mirror of
https://github.com/k3s-io/k3s.git
synced 2024-06-07 19:41:36 +00:00
1049 lines
32 KiB
Bash
1049 lines
32 KiB
Bash
#!/bin/sh
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set -e
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set -o noglob
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# Usage:
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# curl ... | ENV_VAR=... sh -
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# or
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# ENV_VAR=... ./install.sh
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#
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# Example:
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# Installing a server without traefik:
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# curl ... | INSTALL_K3S_EXEC="--disable=traefik" sh -
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# Installing an agent to point at a server:
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# curl ... | K3S_TOKEN=xxx K3S_URL=https://server-url:6443 sh -
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#
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# Environment variables:
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# - K3S_*
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# Environment variables which begin with K3S_ will be preserved for the
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# systemd service to use. Setting K3S_URL without explicitly setting
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# a systemd exec command will default the command to "agent", and we
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# enforce that K3S_TOKEN is also set.
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#
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# - INSTALL_K3S_SKIP_DOWNLOAD
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# If set to true will not download k3s hash or binary.
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#
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# - INSTALL_K3S_FORCE_RESTART
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# If set to true will always restart the K3s service
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#
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# - INSTALL_K3S_SYMLINK
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# If set to 'skip' will not create symlinks, 'force' will overwrite,
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# default will symlink if command does not exist in path.
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#
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# - INSTALL_K3S_SKIP_ENABLE
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# If set to true will not enable or start k3s service.
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#
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# - INSTALL_K3S_SKIP_START
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# If set to true will not start k3s service.
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#
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# - INSTALL_K3S_VERSION
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# Version of k3s to download from github. Will attempt to download from the
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# stable channel if not specified.
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#
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# - INSTALL_K3S_COMMIT
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# Commit of k3s to download from temporary cloud storage.
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# * (for developer & QA use)
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#
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# - INSTALL_K3S_BIN_DIR
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# Directory to install k3s binary, links, and uninstall script to, or use
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# /usr/local/bin as the default
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#
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# - INSTALL_K3S_BIN_DIR_READ_ONLY
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# If set to true will not write files to INSTALL_K3S_BIN_DIR, forces
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# setting INSTALL_K3S_SKIP_DOWNLOAD=true
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#
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# - INSTALL_K3S_SYSTEMD_DIR
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# Directory to install systemd service and environment files to, or use
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# /etc/systemd/system as the default
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#
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# - INSTALL_K3S_EXEC or script arguments
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# Command with flags to use for launching k3s in the systemd service, if
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# the command is not specified will default to "agent" if K3S_URL is set
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# or "server" if not. The final systemd command resolves to a combination
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# of EXEC and script args ($@).
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#
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# The following commands result in the same behavior:
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# curl ... | INSTALL_K3S_EXEC="--disable=traefik" sh -s -
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# curl ... | INSTALL_K3S_EXEC="server --disable=traefik" sh -s -
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# curl ... | INSTALL_K3S_EXEC="server" sh -s - --disable=traefik
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# curl ... | sh -s - server --disable=traefik
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# curl ... | sh -s - --disable=traefik
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#
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# - INSTALL_K3S_NAME
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# Name of systemd service to create, will default from the k3s exec command
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# if not specified. If specified the name will be prefixed with 'k3s-'.
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#
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# - INSTALL_K3S_TYPE
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# Type of systemd service to create, will default from the k3s exec command
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# if not specified.
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#
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# - INSTALL_K3S_SELINUX_WARN
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# If set to true will continue if k3s-selinux policy is not found.
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#
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# - INSTALL_K3S_SKIP_SELINUX_RPM
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# If set to true will skip automatic installation of the k3s RPM.
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#
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# - INSTALL_K3S_CHANNEL_URL
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# Channel URL for fetching k3s download URL.
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# Defaults to 'https://update.k3s.io/v1-release/channels'.
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#
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# - INSTALL_K3S_CHANNEL
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# Channel to use for fetching k3s download URL.
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# Defaults to 'stable'.
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GITHUB_URL=https://github.com/k3s-io/k3s/releases
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STORAGE_URL=https://k3s-ci-builds.s3.amazonaws.com
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DOWNLOADER=
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# --- helper functions for logs ---
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info()
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{
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echo '[INFO] ' "$@"
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}
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warn()
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{
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echo '[WARN] ' "$@" >&2
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}
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fatal()
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{
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echo '[ERROR] ' "$@" >&2
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exit 1
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}
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# --- fatal if no systemd or openrc ---
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verify_system() {
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if [ -x /sbin/openrc-run ]; then
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HAS_OPENRC=true
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return
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fi
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if [ -x /bin/systemctl ] || type systemctl > /dev/null 2>&1; then
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HAS_SYSTEMD=true
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return
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fi
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fatal 'Can not find systemd or openrc to use as a process supervisor for k3s'
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}
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# --- add quotes to command arguments ---
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quote() {
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for arg in "$@"; do
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printf '%s\n' "$arg" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/'/"
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done
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}
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# --- add indentation and trailing slash to quoted args ---
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quote_indent() {
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printf ' \\\n'
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for arg in "$@"; do
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printf '\t%s \\\n' "$(quote "$arg")"
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done
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}
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# --- escape most punctuation characters, except quotes, forward slash, and space ---
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escape() {
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printf '%s' "$@" | sed -e 's/\([][!#$%&()*;<=>?\_`{|}]\)/\\\1/g;'
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}
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# --- escape double quotes ---
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escape_dq() {
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printf '%s' "$@" | sed -e 's/"/\\"/g'
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}
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# --- ensures $K3S_URL is empty or begins with https://, exiting fatally otherwise ---
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verify_k3s_url() {
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case "${K3S_URL}" in
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"")
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;;
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https://*)
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;;
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*)
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fatal "Only https:// URLs are supported for K3S_URL (have ${K3S_URL})"
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;;
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esac
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}
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# --- define needed environment variables ---
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setup_env() {
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# --- use command args if passed or create default ---
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case "$1" in
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# --- if we only have flags discover if command should be server or agent ---
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(-*|"")
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if [ -z "${K3S_URL}" ]; then
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CMD_K3S=server
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else
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if [ -z "${K3S_TOKEN}" ] && [ -z "${K3S_TOKEN_FILE}" ]; then
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fatal "Defaulted k3s exec command to 'agent' because K3S_URL is defined, but K3S_TOKEN or K3S_TOKEN_FILE is not defined."
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fi
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CMD_K3S=agent
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fi
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;;
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# --- command is provided ---
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(*)
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CMD_K3S=$1
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shift
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;;
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esac
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verify_k3s_url
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CMD_K3S_EXEC="${CMD_K3S}$(quote_indent "$@")"
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# --- use systemd name if defined or create default ---
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if [ -n "${INSTALL_K3S_NAME}" ]; then
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SYSTEM_NAME=k3s-${INSTALL_K3S_NAME}
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else
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if [ "${CMD_K3S}" = server ]; then
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SYSTEM_NAME=k3s
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else
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SYSTEM_NAME=k3s-${CMD_K3S}
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fi
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fi
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# --- check for invalid characters in system name ---
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valid_chars=$(printf '%s' "${SYSTEM_NAME}" | sed -e 's/[][!#$%&()*;<=>?\_`{|}/[:space:]]/^/g;' )
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if [ "${SYSTEM_NAME}" != "${valid_chars}" ]; then
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invalid_chars=$(printf '%s' "${valid_chars}" | sed -e 's/[^^]/ /g')
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fatal "Invalid characters for system name:
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${SYSTEM_NAME}
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${invalid_chars}"
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fi
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# --- use sudo if we are not already root ---
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SUDO=sudo
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if [ $(id -u) -eq 0 ]; then
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SUDO=
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fi
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# --- use systemd type if defined or create default ---
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if [ -n "${INSTALL_K3S_TYPE}" ]; then
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SYSTEMD_TYPE=${INSTALL_K3S_TYPE}
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else
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SYSTEMD_TYPE=notify
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fi
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# --- use binary install directory if defined or create default ---
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if [ -n "${INSTALL_K3S_BIN_DIR}" ]; then
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BIN_DIR=${INSTALL_K3S_BIN_DIR}
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else
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# --- use /usr/local/bin if root can write to it, otherwise use /opt/bin if it exists
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BIN_DIR=/usr/local/bin
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if ! $SUDO sh -c "touch ${BIN_DIR}/k3s-ro-test && rm -rf ${BIN_DIR}/k3s-ro-test"; then
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if [ -d /opt/bin ]; then
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BIN_DIR=/opt/bin
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fi
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fi
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fi
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# --- use systemd directory if defined or create default ---
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if [ -n "${INSTALL_K3S_SYSTEMD_DIR}" ]; then
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SYSTEMD_DIR="${INSTALL_K3S_SYSTEMD_DIR}"
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else
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SYSTEMD_DIR=/etc/systemd/system
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fi
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# --- set related files from system name ---
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SERVICE_K3S=${SYSTEM_NAME}.service
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UNINSTALL_K3S_SH=${UNINSTALL_K3S_SH:-${BIN_DIR}/${SYSTEM_NAME}-uninstall.sh}
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KILLALL_K3S_SH=${KILLALL_K3S_SH:-${BIN_DIR}/k3s-killall.sh}
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# --- use service or environment location depending on systemd/openrc ---
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if [ "${HAS_SYSTEMD}" = true ]; then
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FILE_K3S_SERVICE=${SYSTEMD_DIR}/${SERVICE_K3S}
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FILE_K3S_ENV=${SYSTEMD_DIR}/${SERVICE_K3S}.env
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elif [ "${HAS_OPENRC}" = true ]; then
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$SUDO mkdir -p /etc/rancher/k3s
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FILE_K3S_SERVICE=/etc/init.d/${SYSTEM_NAME}
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FILE_K3S_ENV=/etc/rancher/k3s/${SYSTEM_NAME}.env
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fi
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# --- get hash of config & exec for currently installed k3s ---
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PRE_INSTALL_HASHES=$(get_installed_hashes)
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# --- if bin directory is read only skip download ---
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if [ "${INSTALL_K3S_BIN_DIR_READ_ONLY}" = true ]; then
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INSTALL_K3S_SKIP_DOWNLOAD=true
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fi
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# --- setup channel values
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INSTALL_K3S_CHANNEL_URL=${INSTALL_K3S_CHANNEL_URL:-'https://update.k3s.io/v1-release/channels'}
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INSTALL_K3S_CHANNEL=${INSTALL_K3S_CHANNEL:-'stable'}
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}
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# --- check if skip download environment variable set ---
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can_skip_download_binary() {
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if [ "${INSTALL_K3S_SKIP_DOWNLOAD}" != true ] && [ "${INSTALL_K3S_SKIP_DOWNLOAD}" != binary ]; then
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return 1
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fi
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}
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can_skip_download_selinux() {
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if [ "${INSTALL_K3S_SKIP_DOWNLOAD}" != true ] && [ "${INSTALL_K3S_SKIP_DOWNLOAD}" != selinux ]; then
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return 1
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fi
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}
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# --- verify an executable k3s binary is installed ---
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verify_k3s_is_executable() {
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if [ ! -x ${BIN_DIR}/k3s ]; then
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fatal "Executable k3s binary not found at ${BIN_DIR}/k3s"
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fi
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}
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# --- set arch and suffix, fatal if architecture not supported ---
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setup_verify_arch() {
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if [ -z "$ARCH" ]; then
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ARCH=$(uname -m)
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fi
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case $ARCH in
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amd64)
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ARCH=amd64
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SUFFIX=
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;;
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x86_64)
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ARCH=amd64
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SUFFIX=
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;;
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arm64)
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ARCH=arm64
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SUFFIX=-${ARCH}
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;;
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s390x)
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ARCH=s390x
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SUFFIX=-${ARCH}
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;;
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aarch64)
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ARCH=arm64
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SUFFIX=-${ARCH}
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;;
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arm*)
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ARCH=arm
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SUFFIX=-${ARCH}hf
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;;
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*)
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fatal "Unsupported architecture $ARCH"
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esac
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}
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# --- verify existence of network downloader executable ---
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verify_downloader() {
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# Return failure if it doesn't exist or is no executable
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[ -x "$(command -v $1)" ] || return 1
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# Set verified executable as our downloader program and return success
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DOWNLOADER=$1
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return 0
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}
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# --- create temporary directory and cleanup when done ---
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setup_tmp() {
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TMP_DIR=$(mktemp -d -t k3s-install.XXXXXXXXXX)
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TMP_HASH=${TMP_DIR}/k3s.hash
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TMP_BIN=${TMP_DIR}/k3s.bin
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cleanup() {
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code=$?
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set +e
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trap - EXIT
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rm -rf ${TMP_DIR}
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exit $code
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}
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trap cleanup INT EXIT
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}
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# --- use desired k3s version if defined or find version from channel ---
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get_release_version() {
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if [ -n "${INSTALL_K3S_COMMIT}" ]; then
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VERSION_K3S="commit ${INSTALL_K3S_COMMIT}"
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elif [ -n "${INSTALL_K3S_VERSION}" ]; then
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VERSION_K3S=${INSTALL_K3S_VERSION}
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else
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info "Finding release for channel ${INSTALL_K3S_CHANNEL}"
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version_url="${INSTALL_K3S_CHANNEL_URL}/${INSTALL_K3S_CHANNEL}"
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case $DOWNLOADER in
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curl)
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VERSION_K3S=$(curl -w '%{url_effective}' -L -s -S ${version_url} -o /dev/null | sed -e 's|.*/||')
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;;
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wget)
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VERSION_K3S=$(wget -SqO /dev/null ${version_url} 2>&1 | grep -i Location | sed -e 's|.*/||')
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;;
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*)
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fatal "Incorrect downloader executable '$DOWNLOADER'"
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;;
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esac
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fi
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info "Using ${VERSION_K3S} as release"
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}
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# --- get k3s-selinux version ---
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get_k3s_selinux_version() {
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available_version="k3s-selinux-1.2-2.${rpm_target}.noarch.rpm"
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info "Finding available k3s-selinux versions"
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# run verify_downloader in case it binary installation was skipped
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verify_downloader curl || verify_downloader wget || fatal 'Can not find curl or wget for downloading files'
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case $DOWNLOADER in
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curl)
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DOWNLOADER_OPTS="-s"
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;;
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wget)
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DOWNLOADER_OPTS="-q -O -"
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;;
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*)
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fatal "Incorrect downloader executable '$DOWNLOADER'"
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;;
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esac
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for i in {1..3}; do
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set +e
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if [ "${rpm_channel}" = "testing" ]; then
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version=$(timeout 5 ${DOWNLOADER} ${DOWNLOADER_OPTS} https://api.github.com/repos/k3s-io/k3s-selinux/releases | grep browser_download_url | awk '{ print $2 }' | grep -oE "[^\/]+${rpm_target}\.noarch\.rpm" | head -n 1)
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else
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version=$(timeout 5 ${DOWNLOADER} ${DOWNLOADER_OPTS} https://api.github.com/repos/k3s-io/k3s-selinux/releases/latest | grep browser_download_url | awk '{ print $2 }' | grep -oE "[^\/]+${rpm_target}\.noarch\.rpm")
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fi
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set -e
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if [ "${version}" != "" ]; then
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break
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fi
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sleep 1
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done
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if [ "${version}" == "" ]; then
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warn "Failed to get available versions of k3s-selinux..defaulting to ${available_version}"
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return
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fi
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available_version=${version}
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}
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# --- download from github url ---
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download() {
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[ $# -eq 2 ] || fatal 'download needs exactly 2 arguments'
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case $DOWNLOADER in
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curl)
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curl -o $1 -sfL $2
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;;
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wget)
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wget -qO $1 $2
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;;
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*)
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fatal "Incorrect executable '$DOWNLOADER'"
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;;
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esac
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# Abort if download command failed
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[ $? -eq 0 ] || fatal 'Download failed'
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}
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# --- download hash from github url ---
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download_hash() {
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if [ -n "${INSTALL_K3S_COMMIT}" ]; then
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HASH_URL=${STORAGE_URL}/k3s${SUFFIX}-${INSTALL_K3S_COMMIT}.sha256sum
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else
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HASH_URL=${GITHUB_URL}/download/${VERSION_K3S}/sha256sum-${ARCH}.txt
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fi
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info "Downloading hash ${HASH_URL}"
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download ${TMP_HASH} ${HASH_URL}
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HASH_EXPECTED=$(grep " k3s${SUFFIX}$" ${TMP_HASH})
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HASH_EXPECTED=${HASH_EXPECTED%%[[:blank:]]*}
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}
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# --- check hash against installed version ---
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installed_hash_matches() {
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if [ -x ${BIN_DIR}/k3s ]; then
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HASH_INSTALLED=$(sha256sum ${BIN_DIR}/k3s)
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HASH_INSTALLED=${HASH_INSTALLED%%[[:blank:]]*}
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if [ "${HASH_EXPECTED}" = "${HASH_INSTALLED}" ]; then
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return
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fi
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fi
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return 1
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}
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# --- download binary from github url ---
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download_binary() {
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if [ -n "${INSTALL_K3S_COMMIT}" ]; then
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BIN_URL=${STORAGE_URL}/k3s${SUFFIX}-${INSTALL_K3S_COMMIT}
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else
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BIN_URL=${GITHUB_URL}/download/${VERSION_K3S}/k3s${SUFFIX}
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fi
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info "Downloading binary ${BIN_URL}"
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download ${TMP_BIN} ${BIN_URL}
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}
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# --- verify downloaded binary hash ---
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verify_binary() {
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info "Verifying binary download"
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HASH_BIN=$(sha256sum ${TMP_BIN})
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HASH_BIN=${HASH_BIN%%[[:blank:]]*}
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if [ "${HASH_EXPECTED}" != "${HASH_BIN}" ]; then
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fatal "Download sha256 does not match ${HASH_EXPECTED}, got ${HASH_BIN}"
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fi
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}
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# --- setup permissions and move binary to system directory ---
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setup_binary() {
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chmod 755 ${TMP_BIN}
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info "Installing k3s to ${BIN_DIR}/k3s"
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$SUDO chown root:root ${TMP_BIN}
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$SUDO mv -f ${TMP_BIN} ${BIN_DIR}/k3s
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}
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|
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# --- setup selinux policy ---
|
|
setup_selinux() {
|
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case ${INSTALL_K3S_CHANNEL} in
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|
*testing)
|
|
rpm_channel=testing
|
|
;;
|
|
*latest)
|
|
rpm_channel=latest
|
|
;;
|
|
*)
|
|
rpm_channel=stable
|
|
;;
|
|
esac
|
|
|
|
rpm_site="rpm.rancher.io"
|
|
if [ "${rpm_channel}" = "testing" ]; then
|
|
rpm_site="rpm-testing.rancher.io"
|
|
fi
|
|
|
|
[ -r /etc/os-release ] && . /etc/os-release
|
|
if [ `expr "${ID_LIKE}" : ".*suse.*"` != 0 ]; then
|
|
rpm_target=sle
|
|
rpm_site_infix=microos
|
|
package_installer=zypper
|
|
if [ "${ID_LIKE:-}" = suse ] && ( [ "${VARIANT_ID:-}" = sle-micro ] || [ "${ID:-}" = sle-micro ] ); then
|
|
rpm_target=sle
|
|
rpm_site_infix=slemicro
|
|
package_installer=zypper
|
|
fi
|
|
elif [ "${ID_LIKE:-}" = coreos ] || [ "${VARIANT_ID:-}" = coreos ]; then
|
|
rpm_target=coreos
|
|
rpm_site_infix=coreos
|
|
package_installer=rpm-ostree
|
|
elif [ "${VERSION_ID%%.*}" = "7" ]; then
|
|
rpm_target=el7
|
|
rpm_site_infix=centos/7
|
|
package_installer=yum
|
|
elif [ "${VERSION_ID%%.*}" = "8" ] || [ "${VERSION_ID%%.*}" -gt "36" ]; then
|
|
rpm_target=el8
|
|
rpm_site_infix=centos/8
|
|
package_installer=yum
|
|
else
|
|
rpm_target=el9
|
|
rpm_site_infix=centos/9
|
|
package_installer=yum
|
|
fi
|
|
|
|
if [ "${package_installer}" = "rpm-ostree" ] && [ -x /bin/yum ]; then
|
|
package_installer=yum
|
|
fi
|
|
|
|
if [ "${package_installer}" = "yum" ] && [ -x /usr/bin/dnf ]; then
|
|
package_installer=dnf
|
|
fi
|
|
|
|
policy_hint="please install:
|
|
${package_installer} install -y container-selinux
|
|
${package_installer} install -y https://${rpm_site}/k3s/${rpm_channel}/common/${rpm_site_infix}/noarch/${available_version}
|
|
"
|
|
|
|
if [ "$INSTALL_K3S_SKIP_SELINUX_RPM" = true ] || can_skip_download_selinux || [ ! -d /usr/share/selinux ]; then
|
|
info "Skipping installation of SELinux RPM"
|
|
else
|
|
get_k3s_selinux_version
|
|
install_selinux_rpm ${rpm_site} ${rpm_channel} ${rpm_target} ${rpm_site_infix}
|
|
fi
|
|
|
|
policy_error=fatal
|
|
if [ "$INSTALL_K3S_SELINUX_WARN" = true ] || [ "${ID_LIKE:-}" = coreos ] || [ "${VARIANT_ID:-}" = coreos ]; then
|
|
policy_error=warn
|
|
fi
|
|
|
|
if ! $SUDO chcon -u system_u -r object_r -t container_runtime_exec_t ${BIN_DIR}/k3s >/dev/null 2>&1; then
|
|
if $SUDO grep '^\s*SELINUX=enforcing' /etc/selinux/config >/dev/null 2>&1; then
|
|
$policy_error "Failed to apply container_runtime_exec_t to ${BIN_DIR}/k3s, ${policy_hint}"
|
|
fi
|
|
elif [ ! -f /usr/share/selinux/packages/k3s.pp ]; then
|
|
if [ -x /usr/sbin/transactional-update ] || [ "${ID_LIKE:-}" = coreos ] || [ "${VARIANT_ID:-}" = coreos ]; then
|
|
warn "Please reboot your machine to activate the changes and avoid data loss."
|
|
else
|
|
$policy_error "Failed to find the k3s-selinux policy, ${policy_hint}"
|
|
fi
|
|
fi
|
|
}
|
|
|
|
install_selinux_rpm() {
|
|
if [ -r /etc/redhat-release ] || [ -r /etc/centos-release ] || [ -r /etc/oracle-release ] || [ -r /etc/fedora-release ] || [ "${ID_LIKE%%[ ]*}" = "suse" ]; then
|
|
repodir=/etc/yum.repos.d
|
|
if [ -d /etc/zypp/repos.d ]; then
|
|
repodir=/etc/zypp/repos.d
|
|
fi
|
|
set +o noglob
|
|
$SUDO rm -f ${repodir}/rancher-k3s-common*.repo
|
|
set -o noglob
|
|
if [ -r /etc/redhat-release ] && [ "${3}" = "el7" ]; then
|
|
$SUDO yum install -y yum-utils
|
|
$SUDO yum-config-manager --enable rhel-7-server-extras-rpms
|
|
fi
|
|
$SUDO tee ${repodir}/rancher-k3s-common.repo >/dev/null << EOF
|
|
[rancher-k3s-common-${2}]
|
|
name=Rancher K3s Common (${2})
|
|
baseurl=https://${1}/k3s/${2}/common/${4}/noarch
|
|
enabled=1
|
|
gpgcheck=1
|
|
repo_gpgcheck=0
|
|
gpgkey=https://${1}/public.key
|
|
EOF
|
|
case ${3} in
|
|
sle)
|
|
rpm_installer="zypper --gpg-auto-import-keys"
|
|
if [ "${TRANSACTIONAL_UPDATE=false}" != "true" ] && [ -x /usr/sbin/transactional-update ]; then
|
|
transactional_update_run="transactional-update --no-selfupdate -d run"
|
|
rpm_installer="transactional-update --no-selfupdate -d run ${rpm_installer}"
|
|
: "${INSTALL_K3S_SKIP_START:=true}"
|
|
fi
|
|
# create the /var/lib/rpm-state in SLE systems to fix the prein selinux macro
|
|
${transactional_update_run} mkdir -p /var/lib/rpm-state
|
|
;;
|
|
coreos)
|
|
rpm_installer="rpm-ostree --idempotent"
|
|
# rpm_install_extra_args="--apply-live"
|
|
: "${INSTALL_K3S_SKIP_START:=true}"
|
|
;;
|
|
*)
|
|
rpm_installer="yum"
|
|
;;
|
|
esac
|
|
if [ "${rpm_installer}" = "yum" ] && [ -x /usr/bin/dnf ]; then
|
|
rpm_installer=dnf
|
|
fi
|
|
if rpm -q --quiet k3s-selinux; then
|
|
# remove k3s-selinux module before upgrade to allow container-selinux to upgrade safely
|
|
if check_available_upgrades container-selinux ${3} && check_available_upgrades k3s-selinux ${3}; then
|
|
MODULE_PRIORITY=$($SUDO semodule --list=full | grep k3s | cut -f1 -d" ")
|
|
if [ -n "${MODULE_PRIORITY}" ]; then
|
|
$SUDO semodule -X $MODULE_PRIORITY -r k3s || true
|
|
fi
|
|
fi
|
|
fi
|
|
# shellcheck disable=SC2086
|
|
$SUDO ${rpm_installer} install -y "k3s-selinux"
|
|
fi
|
|
return
|
|
}
|
|
|
|
check_available_upgrades() {
|
|
set +e
|
|
case ${2} in
|
|
sle)
|
|
available_upgrades=$($SUDO zypper -q -t -s 11 se -s -u --type package $1 | tail -n 1 | grep -v "No matching" | awk '{print $3}')
|
|
;;
|
|
coreos)
|
|
# currently rpm-ostree does not support search functionality https://github.com/coreos/rpm-ostree/issues/1877
|
|
;;
|
|
*)
|
|
available_upgrades=$($SUDO yum -q --refresh list $1 --upgrades | tail -n 1 | awk '{print $2}')
|
|
;;
|
|
esac
|
|
set -e
|
|
if [ -n "${available_upgrades}" ]; then
|
|
return 0
|
|
fi
|
|
return 1
|
|
}
|
|
# --- download and verify k3s ---
|
|
download_and_verify() {
|
|
if can_skip_download_binary; then
|
|
info 'Skipping k3s download and verify'
|
|
verify_k3s_is_executable
|
|
return
|
|
fi
|
|
|
|
setup_verify_arch
|
|
verify_downloader curl || verify_downloader wget || fatal 'Can not find curl or wget for downloading files'
|
|
setup_tmp
|
|
get_release_version
|
|
download_hash
|
|
|
|
if installed_hash_matches; then
|
|
info 'Skipping binary downloaded, installed k3s matches hash'
|
|
return
|
|
fi
|
|
|
|
download_binary
|
|
verify_binary
|
|
setup_binary
|
|
}
|
|
|
|
# --- add additional utility links ---
|
|
create_symlinks() {
|
|
[ "${INSTALL_K3S_BIN_DIR_READ_ONLY}" = true ] && return
|
|
[ "${INSTALL_K3S_SYMLINK}" = skip ] && return
|
|
|
|
for cmd in kubectl crictl ctr; do
|
|
if [ ! -e ${BIN_DIR}/${cmd} ] || [ "${INSTALL_K3S_SYMLINK}" = force ]; then
|
|
which_cmd=$(command -v ${cmd} 2>/dev/null || true)
|
|
if [ -z "${which_cmd}" ] || [ "${INSTALL_K3S_SYMLINK}" = force ]; then
|
|
info "Creating ${BIN_DIR}/${cmd} symlink to k3s"
|
|
$SUDO ln -sf k3s ${BIN_DIR}/${cmd}
|
|
else
|
|
info "Skipping ${BIN_DIR}/${cmd} symlink to k3s, command exists in PATH at ${which_cmd}"
|
|
fi
|
|
else
|
|
info "Skipping ${BIN_DIR}/${cmd} symlink to k3s, already exists"
|
|
fi
|
|
done
|
|
}
|
|
|
|
# --- create killall script ---
|
|
create_killall() {
|
|
[ "${INSTALL_K3S_BIN_DIR_READ_ONLY}" = true ] && return
|
|
info "Creating killall script ${KILLALL_K3S_SH}"
|
|
$SUDO tee ${KILLALL_K3S_SH} >/dev/null << \EOF
|
|
#!/bin/sh
|
|
[ $(id -u) -eq 0 ] || exec sudo $0 $@
|
|
|
|
for bin in /var/lib/rancher/k3s/data/**/bin/; do
|
|
[ -d $bin ] && export PATH=$PATH:$bin:$bin/aux
|
|
done
|
|
|
|
set -x
|
|
|
|
for service in /etc/systemd/system/k3s*.service; do
|
|
[ -s $service ] && systemctl stop $(basename $service)
|
|
done
|
|
|
|
for service in /etc/init.d/k3s*; do
|
|
[ -x $service ] && $service stop
|
|
done
|
|
|
|
pschildren() {
|
|
ps -e -o ppid= -o pid= | \
|
|
sed -e 's/^\s*//g; s/\s\s*/\t/g;' | \
|
|
grep -w "^$1" | \
|
|
cut -f2
|
|
}
|
|
|
|
pstree() {
|
|
for pid in $@; do
|
|
echo $pid
|
|
for child in $(pschildren $pid); do
|
|
pstree $child
|
|
done
|
|
done
|
|
}
|
|
|
|
killtree() {
|
|
kill -9 $(
|
|
{ set +x; } 2>/dev/null;
|
|
pstree $@;
|
|
set -x;
|
|
) 2>/dev/null
|
|
}
|
|
|
|
remove_interfaces() {
|
|
# Delete network interface(s) that match 'master cni0'
|
|
ip link show 2>/dev/null | grep 'master cni0' | while read ignore iface ignore; do
|
|
iface=${iface%%@*}
|
|
[ -z "$iface" ] || ip link delete $iface
|
|
done
|
|
|
|
# Delete cni related interfaces
|
|
ip link delete cni0
|
|
ip link delete flannel.1
|
|
ip link delete flannel-v6.1
|
|
ip link delete kube-ipvs0
|
|
ip link delete flannel-wg
|
|
ip link delete flannel-wg-v6
|
|
|
|
# Restart tailscale
|
|
if [ -n "$(command -v tailscale)" ]; then
|
|
tailscale set --advertise-routes=
|
|
fi
|
|
}
|
|
|
|
getshims() {
|
|
ps -e -o pid= -o args= | sed -e 's/^ *//; s/\s\s*/\t/;' | grep -w 'k3s/data/[^/]*/bin/containerd-shim' | cut -f1
|
|
}
|
|
|
|
killtree $({ set +x; } 2>/dev/null; getshims; set -x)
|
|
|
|
do_unmount_and_remove() {
|
|
set +x
|
|
while read -r _ path _; do
|
|
case "$path" in $1*) echo "$path" ;; esac
|
|
done < /proc/self/mounts | sort -r | xargs -r -t -n 1 sh -c 'umount "$0" && rm -rf "$0"'
|
|
set -x
|
|
}
|
|
|
|
do_unmount_and_remove '/run/k3s'
|
|
do_unmount_and_remove '/var/lib/rancher/k3s'
|
|
do_unmount_and_remove '/var/lib/kubelet/pods'
|
|
do_unmount_and_remove '/var/lib/kubelet/plugins'
|
|
do_unmount_and_remove '/run/netns/cni-'
|
|
|
|
# Remove CNI namespaces
|
|
ip netns show 2>/dev/null | grep cni- | xargs -r -t -n 1 ip netns delete
|
|
|
|
remove_interfaces
|
|
|
|
rm -rf /var/lib/cni/
|
|
iptables-save | grep -v KUBE- | grep -v CNI- | grep -iv flannel | iptables-restore
|
|
ip6tables-save | grep -v KUBE- | grep -v CNI- | grep -iv flannel | ip6tables-restore
|
|
EOF
|
|
$SUDO chmod 755 ${KILLALL_K3S_SH}
|
|
$SUDO chown root:root ${KILLALL_K3S_SH}
|
|
}
|
|
|
|
# --- create uninstall script ---
|
|
create_uninstall() {
|
|
[ "${INSTALL_K3S_BIN_DIR_READ_ONLY}" = true ] && return
|
|
info "Creating uninstall script ${UNINSTALL_K3S_SH}"
|
|
$SUDO tee ${UNINSTALL_K3S_SH} >/dev/null << EOF
|
|
#!/bin/sh
|
|
set -x
|
|
[ \$(id -u) -eq 0 ] || exec sudo \$0 \$@
|
|
|
|
${KILLALL_K3S_SH}
|
|
|
|
if command -v systemctl; then
|
|
systemctl disable ${SYSTEM_NAME}
|
|
systemctl reset-failed ${SYSTEM_NAME}
|
|
systemctl daemon-reload
|
|
fi
|
|
if command -v rc-update; then
|
|
rc-update delete ${SYSTEM_NAME} default
|
|
fi
|
|
|
|
rm -f ${FILE_K3S_SERVICE}
|
|
rm -f ${FILE_K3S_ENV}
|
|
|
|
remove_uninstall() {
|
|
rm -f ${UNINSTALL_K3S_SH}
|
|
}
|
|
trap remove_uninstall EXIT
|
|
|
|
if (ls ${SYSTEMD_DIR}/k3s*.service || ls /etc/init.d/k3s*) >/dev/null 2>&1; then
|
|
set +x; echo 'Additional k3s services installed, skipping uninstall of k3s'; set -x
|
|
exit
|
|
fi
|
|
|
|
for cmd in kubectl crictl ctr; do
|
|
if [ -L ${BIN_DIR}/\$cmd ]; then
|
|
rm -f ${BIN_DIR}/\$cmd
|
|
fi
|
|
done
|
|
|
|
rm -rf /etc/rancher/k3s
|
|
rm -rf /run/k3s
|
|
rm -rf /run/flannel
|
|
rm -rf /var/lib/rancher/k3s
|
|
rm -rf /var/lib/kubelet
|
|
rm -f ${BIN_DIR}/k3s
|
|
rm -f ${KILLALL_K3S_SH}
|
|
|
|
if type yum >/dev/null 2>&1; then
|
|
yum remove -y k3s-selinux
|
|
rm -f /etc/yum.repos.d/rancher-k3s-common*.repo
|
|
elif type rpm-ostree >/dev/null 2>&1; then
|
|
rpm-ostree uninstall k3s-selinux
|
|
rm -f /etc/yum.repos.d/rancher-k3s-common*.repo
|
|
elif type zypper >/dev/null 2>&1; then
|
|
uninstall_cmd="zypper remove -y k3s-selinux"
|
|
if [ "\${TRANSACTIONAL_UPDATE=false}" != "true" ] && [ -x /usr/sbin/transactional-update ]; then
|
|
uninstall_cmd="transactional-update --no-selfupdate -d run \$uninstall_cmd"
|
|
fi
|
|
\$uninstall_cmd
|
|
rm -f /etc/zypp/repos.d/rancher-k3s-common*.repo
|
|
fi
|
|
EOF
|
|
$SUDO chmod 755 ${UNINSTALL_K3S_SH}
|
|
$SUDO chown root:root ${UNINSTALL_K3S_SH}
|
|
}
|
|
|
|
# --- disable current service if loaded --
|
|
systemd_disable() {
|
|
$SUDO systemctl disable ${SYSTEM_NAME} >/dev/null 2>&1 || true
|
|
$SUDO rm -f /etc/systemd/system/${SERVICE_K3S} || true
|
|
$SUDO rm -f /etc/systemd/system/${SERVICE_K3S}.env || true
|
|
}
|
|
|
|
# --- capture current env and create file containing k3s_ variables ---
|
|
create_env_file() {
|
|
info "env: Creating environment file ${FILE_K3S_ENV}"
|
|
$SUDO touch ${FILE_K3S_ENV}
|
|
$SUDO chmod 0600 ${FILE_K3S_ENV}
|
|
sh -c export | while read x v; do echo $v; done | grep -E '^(K3S|CONTAINERD)_' | $SUDO tee ${FILE_K3S_ENV} >/dev/null
|
|
sh -c export | while read x v; do echo $v; done | grep -Ei '^(NO|HTTP|HTTPS)_PROXY' | $SUDO tee -a ${FILE_K3S_ENV} >/dev/null
|
|
}
|
|
|
|
# --- write systemd service file ---
|
|
create_systemd_service_file() {
|
|
info "systemd: Creating service file ${FILE_K3S_SERVICE}"
|
|
$SUDO tee ${FILE_K3S_SERVICE} >/dev/null << EOF
|
|
[Unit]
|
|
Description=Lightweight Kubernetes
|
|
Documentation=https://k3s.io
|
|
Wants=network-online.target
|
|
After=network-online.target
|
|
|
|
[Install]
|
|
WantedBy=multi-user.target
|
|
|
|
[Service]
|
|
Type=${SYSTEMD_TYPE}
|
|
EnvironmentFile=-/etc/default/%N
|
|
EnvironmentFile=-/etc/sysconfig/%N
|
|
EnvironmentFile=-${FILE_K3S_ENV}
|
|
KillMode=process
|
|
Delegate=yes
|
|
# Having non-zero Limit*s causes performance problems due to accounting overhead
|
|
# in the kernel. We recommend using cgroups to do container-local accounting.
|
|
LimitNOFILE=1048576
|
|
LimitNPROC=infinity
|
|
LimitCORE=infinity
|
|
TasksMax=infinity
|
|
TimeoutStartSec=0
|
|
Restart=always
|
|
RestartSec=5s
|
|
ExecStartPre=/bin/sh -xc '! /usr/bin/systemctl is-enabled --quiet nm-cloud-setup.service'
|
|
ExecStartPre=-/sbin/modprobe br_netfilter
|
|
ExecStartPre=-/sbin/modprobe overlay
|
|
ExecStart=${BIN_DIR}/k3s \\
|
|
${CMD_K3S_EXEC}
|
|
|
|
EOF
|
|
}
|
|
|
|
# --- write openrc service file ---
|
|
create_openrc_service_file() {
|
|
LOG_FILE=/var/log/${SYSTEM_NAME}.log
|
|
|
|
info "openrc: Creating service file ${FILE_K3S_SERVICE}"
|
|
$SUDO tee ${FILE_K3S_SERVICE} >/dev/null << EOF
|
|
#!/sbin/openrc-run
|
|
|
|
depend() {
|
|
after network-online
|
|
want cgroups
|
|
}
|
|
|
|
start_pre() {
|
|
rm -f /tmp/k3s.*
|
|
}
|
|
|
|
supervisor=supervise-daemon
|
|
name=${SYSTEM_NAME}
|
|
command="${BIN_DIR}/k3s"
|
|
command_args="$(escape_dq "${CMD_K3S_EXEC}")
|
|
>>${LOG_FILE} 2>&1"
|
|
|
|
output_log=${LOG_FILE}
|
|
error_log=${LOG_FILE}
|
|
|
|
pidfile="/var/run/${SYSTEM_NAME}.pid"
|
|
respawn_delay=5
|
|
respawn_max=0
|
|
|
|
set -o allexport
|
|
if [ -f /etc/environment ]; then . /etc/environment; fi
|
|
if [ -f ${FILE_K3S_ENV} ]; then . ${FILE_K3S_ENV}; fi
|
|
set +o allexport
|
|
EOF
|
|
$SUDO chmod 0755 ${FILE_K3S_SERVICE}
|
|
|
|
$SUDO tee /etc/logrotate.d/${SYSTEM_NAME} >/dev/null << EOF
|
|
${LOG_FILE} {
|
|
missingok
|
|
notifempty
|
|
copytruncate
|
|
}
|
|
EOF
|
|
}
|
|
|
|
# --- write systemd or openrc service file ---
|
|
create_service_file() {
|
|
[ "${HAS_SYSTEMD}" = true ] && create_systemd_service_file
|
|
[ "${HAS_OPENRC}" = true ] && create_openrc_service_file
|
|
return 0
|
|
}
|
|
|
|
# --- get hashes of the current k3s bin and service files
|
|
get_installed_hashes() {
|
|
$SUDO sha256sum ${BIN_DIR}/k3s ${FILE_K3S_SERVICE} ${FILE_K3S_ENV} 2>&1 || true
|
|
}
|
|
|
|
# --- enable and start systemd service ---
|
|
systemd_enable() {
|
|
info "systemd: Enabling ${SYSTEM_NAME} unit"
|
|
$SUDO systemctl enable ${FILE_K3S_SERVICE} >/dev/null
|
|
$SUDO systemctl daemon-reload >/dev/null
|
|
}
|
|
|
|
systemd_start() {
|
|
info "systemd: Starting ${SYSTEM_NAME}"
|
|
$SUDO systemctl restart ${SYSTEM_NAME}
|
|
}
|
|
|
|
# --- enable and start openrc service ---
|
|
openrc_enable() {
|
|
info "openrc: Enabling ${SYSTEM_NAME} service for default runlevel"
|
|
$SUDO rc-update add ${SYSTEM_NAME} default >/dev/null
|
|
}
|
|
|
|
openrc_start() {
|
|
info "openrc: Starting ${SYSTEM_NAME}"
|
|
$SUDO ${FILE_K3S_SERVICE} restart
|
|
}
|
|
|
|
# --- startup systemd or openrc service ---
|
|
service_enable_and_start() {
|
|
if [ -f "/proc/cgroups" ] && [ "$(grep memory /proc/cgroups | while read -r n n n enabled; do echo $enabled; done)" -eq 0 ];
|
|
then
|
|
info 'Failed to find memory cgroup, you may need to add "cgroup_memory=1 cgroup_enable=memory" to your linux cmdline (/boot/cmdline.txt on a Raspberry Pi)'
|
|
fi
|
|
|
|
[ "${INSTALL_K3S_SKIP_ENABLE}" = true ] && return
|
|
|
|
[ "${HAS_SYSTEMD}" = true ] && systemd_enable
|
|
[ "${HAS_OPENRC}" = true ] && openrc_enable
|
|
|
|
[ "${INSTALL_K3S_SKIP_START}" = true ] && return
|
|
|
|
POST_INSTALL_HASHES=$(get_installed_hashes)
|
|
if [ "${PRE_INSTALL_HASHES}" = "${POST_INSTALL_HASHES}" ] && [ "${INSTALL_K3S_FORCE_RESTART}" != true ]; then
|
|
info 'No change detected so skipping service start'
|
|
return
|
|
fi
|
|
|
|
if command -v iptables-save 1> /dev/null && command -v iptables-restore 1> /dev/null
|
|
then
|
|
$SUDO iptables-save | grep -v KUBE- | grep -iv flannel | $SUDO iptables-restore
|
|
fi
|
|
if command -v ip6tables-save 1> /dev/null && command -v ip6tables-restore 1> /dev/null
|
|
then
|
|
$SUDO ip6tables-save | grep -v KUBE- | grep -iv flannel | $SUDO ip6tables-restore
|
|
fi
|
|
|
|
[ "${HAS_SYSTEMD}" = true ] && systemd_start
|
|
[ "${HAS_OPENRC}" = true ] && openrc_start
|
|
return 0
|
|
}
|
|
|
|
# --- re-evaluate args to include env command ---
|
|
eval set -- $(escape "${INSTALL_K3S_EXEC}") $(quote "$@")
|
|
|
|
# --- run the install process --
|
|
{
|
|
verify_system
|
|
setup_env "$@"
|
|
download_and_verify
|
|
setup_selinux
|
|
create_symlinks
|
|
create_killall
|
|
create_uninstall
|
|
systemd_disable
|
|
create_env_file
|
|
create_service_file
|
|
service_enable_and_start
|
|
}
|
|
|