mirror of
https://github.com/k3s-io/k3s.git
synced 2024-06-07 19:41:36 +00:00
921e11930e
When for some reason, k3s crashes, and can't startup again, e.g. when
the data backend is not available (dqlite crashed, database server is
offline, ...), on openrc systems, supervise-daemon will try to restart
it, as per supervise-daemon(8):
respawn-max:
Sets the maximum number of times a daemon will be respawned during
a respawn period. If a daemon dies more than this number of times
during a respawn period, will give up trying to respawn it and exit.
The default is 10, and 0 means unlimited.
Setting respawn-max to 0, makes sure a k3s process on openrc systems will
keep trying to come online, even if the database backend is offline for a
longer period of time.
This aligns the openrc service configuration with the systemd
configuration, which has
Restart=always
RestartSec=5s
784 lines
22 KiB
Bash
Executable File
784 lines
22 KiB
Bash
Executable File
#!/bin/sh
|
|
set -e
|
|
|
|
# Usage:
|
|
# curl ... | ENV_VAR=... sh -
|
|
# or
|
|
# ENV_VAR=... ./install.sh
|
|
#
|
|
# Example:
|
|
# Installing a server without traefik:
|
|
# curl ... | INSTALL_K3S_EXEC="--disable=traefik" sh -
|
|
# Installing an agent to point at a server:
|
|
# curl ... | K3S_TOKEN=xxx K3S_URL=https://server-url:6443 sh -
|
|
#
|
|
# Environment variables:
|
|
# - K3S_*
|
|
# Environment variables which begin with K3S_ will be preserved for the
|
|
# systemd service to use. Setting K3S_URL without explicitly setting
|
|
# a systemd exec command will default the command to "agent", and we
|
|
# enforce that K3S_TOKEN or K3S_CLUSTER_SECRET is also set.
|
|
#
|
|
# - INSTALL_K3S_SKIP_DOWNLOAD
|
|
# If set to true will not download k3s hash or binary.
|
|
#
|
|
# - INSTALL_K3S_SYMLINK
|
|
# If set to 'skip' will not create symlinks, 'force' will overwrite,
|
|
# default will symlink if command does not exist in path.
|
|
#
|
|
# - INSTALL_K3S_SKIP_ENABLE
|
|
# If set to true will not enable or start k3s service.
|
|
#
|
|
# - INSTALL_K3S_SKIP_START
|
|
# If set to true will not start k3s service.
|
|
#
|
|
# - INSTALL_K3S_VERSION
|
|
# Version of k3s to download from github. Will attempt to download from the
|
|
# stable channel if not specified.
|
|
#
|
|
# - INSTALL_K3S_COMMIT
|
|
# Commit of k3s to download from temporary cloud storage.
|
|
# * (for developer & QA use)
|
|
#
|
|
# - INSTALL_K3S_BIN_DIR
|
|
# Directory to install k3s binary, links, and uninstall script to, or use
|
|
# /usr/local/bin as the default
|
|
#
|
|
# - INSTALL_K3S_BIN_DIR_READ_ONLY
|
|
# If set to true will not write files to INSTALL_K3S_BIN_DIR, forces
|
|
# setting INSTALL_K3S_SKIP_DOWNLOAD=true
|
|
#
|
|
# - INSTALL_K3S_SYSTEMD_DIR
|
|
# Directory to install systemd service and environment files to, or use
|
|
# /etc/systemd/system as the default
|
|
#
|
|
# - INSTALL_K3S_EXEC or script arguments
|
|
# Command with flags to use for launching k3s in the systemd service, if
|
|
# the command is not specified will default to "agent" if K3S_URL is set
|
|
# or "server" if not. The final systemd command resolves to a combination
|
|
# of EXEC and script args ($@).
|
|
#
|
|
# The following commands result in the same behavior:
|
|
# curl ... | INSTALL_K3S_EXEC="--disable=traefik" sh -s -
|
|
# curl ... | INSTALL_K3S_EXEC="server --disable=traefik" sh -s -
|
|
# curl ... | INSTALL_K3S_EXEC="server" sh -s - --disable=traefik
|
|
# curl ... | sh -s - server --disable=traefik
|
|
# curl ... | sh -s - --disable=traefik
|
|
#
|
|
# - INSTALL_K3S_NAME
|
|
# Name of systemd service to create, will default from the k3s exec command
|
|
# if not specified. If specified the name will be prefixed with 'k3s-'.
|
|
#
|
|
# - INSTALL_K3S_TYPE
|
|
# Type of systemd service to create, will default from the k3s exec command
|
|
# if not specified.
|
|
#
|
|
# - INSTALL_K3S_SELINUX_WARN
|
|
# If set to true will continue if k3s-selinux policy is not found.
|
|
#
|
|
# - INSTALL_K3S_CHANNEL_URL
|
|
# Channel URL for fetching k3s download URL.
|
|
# Defaults to 'https://update.k3s.io/v1-release/channels'.
|
|
#
|
|
# - INSTALL_K3S_CHANNEL
|
|
# Channel to use for fetching k3s download URL.
|
|
# Defaults to 'stable'.
|
|
|
|
GITHUB_URL=https://github.com/rancher/k3s/releases
|
|
STORAGE_URL=https://storage.googleapis.com/k3s-ci-builds
|
|
DOWNLOADER=
|
|
|
|
# --- helper functions for logs ---
|
|
info()
|
|
{
|
|
echo '[INFO] ' "$@"
|
|
}
|
|
warn()
|
|
{
|
|
echo '[WARN] ' "$@" >&2
|
|
}
|
|
fatal()
|
|
{
|
|
echo '[ERROR] ' "$@" >&2
|
|
exit 1
|
|
}
|
|
|
|
# --- fatal if no systemd or openrc ---
|
|
verify_system() {
|
|
if [ -x /sbin/openrc-run ]; then
|
|
HAS_OPENRC=true
|
|
return
|
|
fi
|
|
if [ -d /run/systemd ]; then
|
|
HAS_SYSTEMD=true
|
|
return
|
|
fi
|
|
fatal 'Can not find systemd or openrc to use as a process supervisor for k3s'
|
|
}
|
|
|
|
# --- add quotes to command arguments ---
|
|
quote() {
|
|
for arg in "$@"; do
|
|
printf '%s\n' "$arg" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/'/"
|
|
done
|
|
}
|
|
|
|
# --- add indentation and trailing slash to quoted args ---
|
|
quote_indent() {
|
|
printf ' \\\n'
|
|
for arg in "$@"; do
|
|
printf '\t%s \\\n' "$(quote "$arg")"
|
|
done
|
|
}
|
|
|
|
# --- escape most punctuation characters, except quotes, forward slash, and space ---
|
|
escape() {
|
|
printf '%s' "$@" | sed -e 's/\([][!#$%&()*;<=>?\_`{|}]\)/\\\1/g;'
|
|
}
|
|
|
|
# --- escape double quotes ---
|
|
escape_dq() {
|
|
printf '%s' "$@" | sed -e 's/"/\\"/g'
|
|
}
|
|
|
|
# --- define needed environment variables ---
|
|
setup_env() {
|
|
# --- use command args if passed or create default ---
|
|
case "$1" in
|
|
# --- if we only have flags discover if command should be server or agent ---
|
|
(-*|"")
|
|
if [ -z "${K3S_URL}" ]; then
|
|
CMD_K3S=server
|
|
else
|
|
if [ -z "${K3S_TOKEN}" ] && [ -z "${K3S_CLUSTER_SECRET}" ]; then
|
|
fatal "Defaulted k3s exec command to 'agent' because K3S_URL is defined, but K3S_TOKEN or K3S_CLUSTER_SECRET is not defined."
|
|
fi
|
|
CMD_K3S=agent
|
|
fi
|
|
;;
|
|
# --- command is provided ---
|
|
(*)
|
|
CMD_K3S=$1
|
|
shift
|
|
;;
|
|
esac
|
|
CMD_K3S_EXEC="${CMD_K3S}$(quote_indent "$@")"
|
|
|
|
# --- use systemd name if defined or create default ---
|
|
if [ -n "${INSTALL_K3S_NAME}" ]; then
|
|
SYSTEM_NAME=k3s-${INSTALL_K3S_NAME}
|
|
else
|
|
if [ "${CMD_K3S}" = server ]; then
|
|
SYSTEM_NAME=k3s
|
|
else
|
|
SYSTEM_NAME=k3s-${CMD_K3S}
|
|
fi
|
|
fi
|
|
|
|
# --- check for invalid characters in system name ---
|
|
valid_chars=$(printf '%s' "${SYSTEM_NAME}" | sed -e 's/[][!#$%&()*;<=>?\_`{|}/[:space:]]/^/g;' )
|
|
if [ "${SYSTEM_NAME}" != "${valid_chars}" ]; then
|
|
invalid_chars=$(printf '%s' "${valid_chars}" | sed -e 's/[^^]/ /g')
|
|
fatal "Invalid characters for system name:
|
|
${SYSTEM_NAME}
|
|
${invalid_chars}"
|
|
fi
|
|
|
|
# --- use sudo if we are not already root ---
|
|
SUDO=sudo
|
|
if [ $(id -u) -eq 0 ]; then
|
|
SUDO=
|
|
fi
|
|
|
|
# --- use systemd type if defined or create default ---
|
|
if [ -n "${INSTALL_K3S_TYPE}" ]; then
|
|
SYSTEMD_TYPE=${INSTALL_K3S_TYPE}
|
|
else
|
|
if [ "${CMD_K3S}" = server ]; then
|
|
SYSTEMD_TYPE=notify
|
|
else
|
|
SYSTEMD_TYPE=exec
|
|
fi
|
|
fi
|
|
|
|
# --- use binary install directory if defined or create default ---
|
|
if [ -n "${INSTALL_K3S_BIN_DIR}" ]; then
|
|
BIN_DIR=${INSTALL_K3S_BIN_DIR}
|
|
else
|
|
BIN_DIR=/usr/local/bin
|
|
fi
|
|
|
|
# --- use systemd directory if defined or create default ---
|
|
if [ -n "${INSTALL_K3S_SYSTEMD_DIR}" ]; then
|
|
SYSTEMD_DIR="${INSTALL_K3S_SYSTEMD_DIR}"
|
|
else
|
|
SYSTEMD_DIR=/etc/systemd/system
|
|
fi
|
|
|
|
# --- set related files from system name ---
|
|
SERVICE_K3S=${SYSTEM_NAME}.service
|
|
UNINSTALL_K3S_SH=${UNINSTALL_K3S_SH:-${BIN_DIR}/${SYSTEM_NAME}-uninstall.sh}
|
|
KILLALL_K3S_SH=${KILLALL_K3S_SH:-${BIN_DIR}/k3s-killall.sh}
|
|
|
|
# --- use service or environment location depending on systemd/openrc ---
|
|
if [ "${HAS_SYSTEMD}" = true ]; then
|
|
FILE_K3S_SERVICE=${SYSTEMD_DIR}/${SERVICE_K3S}
|
|
FILE_K3S_ENV=${SYSTEMD_DIR}/${SERVICE_K3S}.env
|
|
elif [ "${HAS_OPENRC}" = true ]; then
|
|
$SUDO mkdir -p /etc/rancher/k3s
|
|
FILE_K3S_SERVICE=/etc/init.d/${SYSTEM_NAME}
|
|
FILE_K3S_ENV=/etc/rancher/k3s/${SYSTEM_NAME}.env
|
|
fi
|
|
|
|
# --- get hash of config & exec for currently installed k3s ---
|
|
PRE_INSTALL_HASHES=$(get_installed_hashes)
|
|
|
|
# --- if bin directory is read only skip download ---
|
|
if [ "${INSTALL_K3S_BIN_DIR_READ_ONLY}" = true ]; then
|
|
INSTALL_K3S_SKIP_DOWNLOAD=true
|
|
fi
|
|
|
|
# --- setup channel values
|
|
INSTALL_K3S_CHANNEL_URL=${INSTALL_K3S_CHANNEL_URL:-'https://update.k3s.io/v1-release/channels'}
|
|
INSTALL_K3S_CHANNEL=${INSTALL_K3S_CHANNEL:-'stable'}
|
|
}
|
|
|
|
# --- check if skip download environment variable set ---
|
|
can_skip_download() {
|
|
if [ "${INSTALL_K3S_SKIP_DOWNLOAD}" != true ]; then
|
|
return 1
|
|
fi
|
|
}
|
|
|
|
# --- verify an executabe k3s binary is installed ---
|
|
verify_k3s_is_executable() {
|
|
if [ ! -x ${BIN_DIR}/k3s ]; then
|
|
fatal "Executable k3s binary not found at ${BIN_DIR}/k3s"
|
|
fi
|
|
}
|
|
|
|
# --- set arch and suffix, fatal if architecture not supported ---
|
|
setup_verify_arch() {
|
|
if [ -z "$ARCH" ]; then
|
|
ARCH=$(uname -m)
|
|
fi
|
|
case $ARCH in
|
|
amd64)
|
|
ARCH=amd64
|
|
SUFFIX=
|
|
;;
|
|
x86_64)
|
|
ARCH=amd64
|
|
SUFFIX=
|
|
;;
|
|
arm64)
|
|
ARCH=arm64
|
|
SUFFIX=-${ARCH}
|
|
;;
|
|
aarch64)
|
|
ARCH=arm64
|
|
SUFFIX=-${ARCH}
|
|
;;
|
|
arm*)
|
|
ARCH=arm
|
|
SUFFIX=-${ARCH}hf
|
|
;;
|
|
*)
|
|
fatal "Unsupported architecture $ARCH"
|
|
esac
|
|
}
|
|
|
|
# --- verify existence of network downloader executable ---
|
|
verify_downloader() {
|
|
# Return failure if it doesn't exist or is no executable
|
|
[ -x "$(which $1)" ] || return 1
|
|
|
|
# Set verified executable as our downloader program and return success
|
|
DOWNLOADER=$1
|
|
return 0
|
|
}
|
|
|
|
# --- create tempory directory and cleanup when done ---
|
|
setup_tmp() {
|
|
TMP_DIR=$(mktemp -d -t k3s-install.XXXXXXXXXX)
|
|
TMP_HASH=${TMP_DIR}/k3s.hash
|
|
TMP_BIN=${TMP_DIR}/k3s.bin
|
|
cleanup() {
|
|
code=$?
|
|
set +e
|
|
trap - EXIT
|
|
rm -rf ${TMP_DIR}
|
|
exit $code
|
|
}
|
|
trap cleanup INT EXIT
|
|
}
|
|
|
|
# --- use desired k3s version if defined or find version from channel ---
|
|
get_release_version() {
|
|
if [ -n "${INSTALL_K3S_COMMIT}" ]; then
|
|
VERSION_K3S="commit ${INSTALL_K3S_COMMIT}"
|
|
elif [ -n "${INSTALL_K3S_VERSION}" ]; then
|
|
VERSION_K3S=${INSTALL_K3S_VERSION}
|
|
else
|
|
info "Finding release for channel ${INSTALL_K3S_CHANNEL}"
|
|
version_url="${INSTALL_K3S_CHANNEL_URL}/${INSTALL_K3S_CHANNEL}"
|
|
case $DOWNLOADER in
|
|
curl)
|
|
VERSION_K3S=$(curl -w '%{url_effective}' -L -s -S ${version_url} -o /dev/null | sed -e 's|.*/||')
|
|
;;
|
|
wget)
|
|
VERSION_K3S=$(wget -SqO /dev/null ${version_url} 2>&1 | grep -i Location | sed -e 's|.*/||')
|
|
;;
|
|
*)
|
|
fatal "Incorrect downloader executable '$DOWNLOADER'"
|
|
;;
|
|
esac
|
|
fi
|
|
info "Using ${VERSION_K3S} as release"
|
|
}
|
|
|
|
# --- download from github url ---
|
|
download() {
|
|
[ $# -eq 2 ] || fatal 'download needs exactly 2 arguments'
|
|
|
|
case $DOWNLOADER in
|
|
curl)
|
|
curl -o $1 -sfL $2
|
|
;;
|
|
wget)
|
|
wget -qO $1 $2
|
|
;;
|
|
*)
|
|
fatal "Incorrect executable '$DOWNLOADER'"
|
|
;;
|
|
esac
|
|
|
|
# Abort if download command failed
|
|
[ $? -eq 0 ] || fatal 'Download failed'
|
|
}
|
|
|
|
# --- download hash from github url ---
|
|
download_hash() {
|
|
if [ -n "${INSTALL_K3S_COMMIT}" ]; then
|
|
HASH_URL=${STORAGE_URL}/k3s${SUFFIX}-${INSTALL_K3S_COMMIT}.sha256sum
|
|
else
|
|
HASH_URL=${GITHUB_URL}/download/${VERSION_K3S}/sha256sum-${ARCH}.txt
|
|
fi
|
|
info "Downloading hash ${HASH_URL}"
|
|
download ${TMP_HASH} ${HASH_URL}
|
|
HASH_EXPECTED=$(grep " k3s${SUFFIX}$" ${TMP_HASH})
|
|
HASH_EXPECTED=${HASH_EXPECTED%%[[:blank:]]*}
|
|
}
|
|
|
|
# --- check hash against installed version ---
|
|
installed_hash_matches() {
|
|
if [ -x ${BIN_DIR}/k3s ]; then
|
|
HASH_INSTALLED=$(sha256sum ${BIN_DIR}/k3s)
|
|
HASH_INSTALLED=${HASH_INSTALLED%%[[:blank:]]*}
|
|
if [ "${HASH_EXPECTED}" = "${HASH_INSTALLED}" ]; then
|
|
return
|
|
fi
|
|
fi
|
|
return 1
|
|
}
|
|
|
|
# --- download binary from github url ---
|
|
download_binary() {
|
|
if [ -n "${INSTALL_K3S_COMMIT}" ]; then
|
|
BIN_URL=${STORAGE_URL}/k3s${SUFFIX}-${INSTALL_K3S_COMMIT}
|
|
else
|
|
BIN_URL=${GITHUB_URL}/download/${VERSION_K3S}/k3s${SUFFIX}
|
|
fi
|
|
info "Downloading binary ${BIN_URL}"
|
|
download ${TMP_BIN} ${BIN_URL}
|
|
}
|
|
|
|
# --- verify downloaded binary hash ---
|
|
verify_binary() {
|
|
info "Verifying binary download"
|
|
HASH_BIN=$(sha256sum ${TMP_BIN})
|
|
HASH_BIN=${HASH_BIN%%[[:blank:]]*}
|
|
if [ "${HASH_EXPECTED}" != "${HASH_BIN}" ]; then
|
|
fatal "Download sha256 does not match ${HASH_EXPECTED}, got ${HASH_BIN}"
|
|
fi
|
|
}
|
|
|
|
# --- setup permissions and move binary to system directory ---
|
|
setup_binary() {
|
|
chmod 755 ${TMP_BIN}
|
|
info "Installing k3s to ${BIN_DIR}/k3s"
|
|
$SUDO chown root:root ${TMP_BIN}
|
|
$SUDO mv -f ${TMP_BIN} ${BIN_DIR}/k3s
|
|
}
|
|
|
|
# --- setup selinux policy ---
|
|
setup_selinux() {
|
|
policy_hint="please install:
|
|
yum install -y container-selinux selinux-policy-base
|
|
rpm -i https://rpm.rancher.io/k3s-selinux-0.1.1-rc1.el7.noarch.rpm
|
|
"
|
|
policy_error=fatal
|
|
if [ "$INSTALL_K3S_SELINUX_WARN" = true ]; 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
|
|
else
|
|
if [ ! -f /usr/share/selinux/packages/k3s.pp ]; then
|
|
$policy_error "Failed to find the k3s-selinux policy, ${policy_hint}"
|
|
fi
|
|
fi
|
|
}
|
|
|
|
# --- download and verify k3s ---
|
|
download_and_verify() {
|
|
if can_skip_download; then
|
|
info 'Skipping k3s download and verify'
|
|
verify_k3s_is_executable
|
|
return
|
|
fi
|
|
|
|
setup_verify_arch
|
|
verify_downloader curl || verify_downloader wget || fatal 'Can not find curl or wget for downloading files'
|
|
setup_tmp
|
|
get_release_version
|
|
download_hash
|
|
|
|
if installed_hash_matches; then
|
|
info 'Skipping binary downloaded, installed k3s matches hash'
|
|
return
|
|
fi
|
|
|
|
download_binary
|
|
verify_binary
|
|
setup_binary
|
|
}
|
|
|
|
# --- add additional utility links ---
|
|
create_symlinks() {
|
|
[ "${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} ] || [ "${INSTALL_K3S_SYMLINK}" = force ]; then
|
|
which_cmd=$(which ${cmd} 2>/dev/null || true)
|
|
if [ -z "${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
|
|
}
|
|
|
|
getshims() {
|
|
ps -e -o pid= -o args= | sed -e 's/^ *//; s/\s\s*/\t/;' | grep -w 'k3s/data/[^/]*/bin/containerd-shim' | cut -f1
|
|
}
|
|
|
|
killtree $({ set +x; } 2>/dev/null; getshims; set -x)
|
|
|
|
do_unmount() {
|
|
{ set +x; } 2>/dev/null
|
|
MOUNTS=
|
|
while read ignore mount ignore; do
|
|
MOUNTS="$mount\n$MOUNTS"
|
|
done </proc/self/mounts
|
|
MOUNTS=$(printf $MOUNTS | grep "^$1" | sort -r)
|
|
if [ -n "${MOUNTS}" ]; then
|
|
set -x
|
|
umount ${MOUNTS}
|
|
else
|
|
set -x
|
|
fi
|
|
}
|
|
|
|
do_unmount '/run/k3s'
|
|
do_unmount '/var/lib/rancher/k3s'
|
|
do_unmount '/var/lib/kubelet/pods'
|
|
do_unmount '/run/netns/cni-'
|
|
|
|
# Delete network interface(s) that match 'master cni0'
|
|
ip link show 2>/dev/null | grep 'master cni0' | while read ignore iface ignore; do
|
|
iface=${iface%%@*}
|
|
[ -z "$iface" ] || ip link delete $iface
|
|
done
|
|
ip link delete cni0
|
|
ip link delete flannel.1
|
|
rm -rf /var/lib/cni/
|
|
iptables-save | grep -v KUBE- | grep -v CNI- | iptables-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 which systemctl; then
|
|
systemctl disable ${SYSTEM_NAME}
|
|
systemctl reset-failed ${SYSTEM_NAME}
|
|
systemctl daemon-reload
|
|
fi
|
|
if which 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 /var/lib/rancher/k3s
|
|
rm -rf /var/lib/kubelet
|
|
rm -f ${BIN_DIR}/k3s
|
|
rm -f ${KILLALL_K3S_SH}
|
|
EOF
|
|
$SUDO chmod 755 ${UNINSTALL_K3S_SH}
|
|
$SUDO chown root:root ${UNINSTALL_K3S_SH}
|
|
}
|
|
|
|
# --- disable current service if loaded --
|
|
systemd_disable() {
|
|
$SUDO rm -f /etc/systemd/system/${SERVICE_K3S} || true
|
|
$SUDO rm -f /etc/systemd/system/${SERVICE_K3S}.env || true
|
|
$SUDO systemctl disable ${SYSTEM_NAME} >/dev/null 2>&1 || true
|
|
}
|
|
|
|
# --- capture current env and create file containing k3s_ variables ---
|
|
create_env_file() {
|
|
info "env: Creating environment file ${FILE_K3S_ENV}"
|
|
UMASK=$(umask)
|
|
umask 0377
|
|
env | grep '^K3S_' | $SUDO tee ${FILE_K3S_ENV} >/dev/null
|
|
env | egrep -i '^(NO|HTTP|HTTPS)_PROXY' | $SUDO tee -a ${FILE_K3S_ENV} >/dev/null
|
|
umask $UMASK
|
|
}
|
|
|
|
# --- write systemd service file ---
|
|
create_systemd_service_file() {
|
|
info "systemd: Creating service file ${FILE_K3S_SERVICE}"
|
|
$SUDO tee ${FILE_K3S_SERVICE} >/dev/null << EOF
|
|
[Unit]
|
|
Description=Lightweight Kubernetes
|
|
Documentation=https://k3s.io
|
|
Wants=network-online.target
|
|
|
|
[Install]
|
|
WantedBy=multi-user.target
|
|
|
|
[Service]
|
|
Type=${SYSTEMD_TYPE}
|
|
EnvironmentFile=${FILE_K3S_ENV}
|
|
KillMode=process
|
|
Delegate=yes
|
|
# Having non-zero Limit*s causes performance problems due to accounting overhead
|
|
# in the kernel. We recommend using cgroups to do container-local accounting.
|
|
LimitNOFILE=1048576
|
|
LimitNPROC=infinity
|
|
LimitCORE=infinity
|
|
TasksMax=infinity
|
|
TimeoutStartSec=0
|
|
Restart=always
|
|
RestartSec=5s
|
|
ExecStartPre=-/sbin/modprobe br_netfilter
|
|
ExecStartPre=-/sbin/modprobe overlay
|
|
ExecStart=${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 source /etc/environment; fi
|
|
if [ -f ${FILE_K3S_ENV} ]; then source ${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 ${FILE_K3S_SERVICE} restart
|
|
}
|
|
|
|
# --- startup systemd or openrc service ---
|
|
service_enable_and_start() {
|
|
[ "${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}" ]; then
|
|
info 'No change detected so skipping service start'
|
|
return
|
|
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
|
|
}
|