mirror of
https://github.com/k3s-io/k3s.git
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Merge pull request #382 from erikwilson/add-openrc-support
Add OpenRC support to installer
This commit is contained in:
Darren Shepherd
GitHub
commit
977ba6f512
179
install.sh
179
install.sh
@ -22,6 +22,9 @@ set -e
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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_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 the
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# latest version if not specified.
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@ -30,6 +33,10 @@ set -e
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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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@ -68,11 +75,17 @@ fatal()
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exit 1
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}
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# --- fatal if no systemd ---
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verify_systemd() {
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if [ ! -d /run/systemd ]; then
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fatal "Can not find systemd to use as a process supervisor for k3s"
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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 [ -d /run/systemd ]; 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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# --- define needed environment variables ---
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@ -102,16 +115,16 @@ setup_env() {
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# --- use systemd name if defined or create default ---
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if [ -n "${INSTALL_K3S_NAME}" ]; then
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SYSTEMD_NAME=k3s-${INSTALL_K3S_NAME}
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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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SYSTEMD_NAME=k3s
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SYSTEM_NAME=k3s
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else
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SYSTEMD_NAME=k3s-${CMD_K3S}
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SYSTEM_NAME=k3s-${CMD_K3S}
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fi
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fi
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SERVICE_K3S=${SYSTEMD_NAME}.service
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UNINSTALL_K3S_SH=${SYSTEMD_NAME}-uninstall.sh
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SERVICE_K3S=${SYSTEM_NAME}.service
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UNINSTALL_K3S_SH=${SYSTEM_NAME}-uninstall.sh
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# --- use systemd type if defined or create default ---
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if [ -n "${INSTALL_K3S_TYPE}" ]; then
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@ -138,11 +151,26 @@ setup_env() {
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SYSTEMD_DIR="/etc/systemd/system"
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fi
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# --- use servive or environment location depending on systemd/openrc ---
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if [ "${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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# --- use sudo if we are not already root ---
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SUDO=sudo
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if [ `id -u` = 0 ]; then
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SUDO=
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fi
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PRE_INSTALL_HASHES=`get_installed_hashes`
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if [ "${INSTALL_K3S_BIN_DIR_READ_ONLY}" = "true" ]; then
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INSTALL_K3S_SKIP_DOWNLOAD=true
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fi
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}
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# --- check if skip download environment variable set ---
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@ -300,6 +328,7 @@ download_and_verify() {
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# --- add additional utility links ---
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create_symlinks() {
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[ "${INSTALL_K3S_BIN_DIR_READ_ONLY}" = "true" ] && return
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if [ ! -e ${BIN_DIR}/kubectl ]; then
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info "Creating ${BIN_DIR}/kubectl symlink to k3s"
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$SUDO ln -s k3s ${BIN_DIR}/kubectl
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@ -313,23 +342,26 @@ create_symlinks() {
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# --- create uninstall script ---
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create_uninstall() {
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[ "${INSTALL_K3S_BIN_DIR_READ_ONLY}" = "true" ] && return
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info "Creating uninstall script ${BIN_DIR}/${UNINSTALL_K3S_SH}"
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$SUDO tee ${BIN_DIR}/${UNINSTALL_K3S_SH} >/dev/null << EOF
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#!/bin/sh
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set -x
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systemctl kill ${SYSTEMD_NAME}
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systemctl disable ${SYSTEMD_NAME}
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systemctl reset-failed ${SYSTEMD_NAME}
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systemctl daemon-reload
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rm -f ${SYSTEMD_DIR}/${SERVICE_K3S}
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rm -f ${SYSTEMD_DIR}/${SERVICE_K3S}.env
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if which systemctl; then
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systemctl kill ${SYSTEM_NAME}
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systemctl disable ${SYSTEM_NAME}
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systemctl reset-failed ${SYSTEM_NAME}
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systemctl daemon-reload
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fi
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rm -f ${FILE_K3S_SERVICE}
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rm -f ${FILE_K3S_ENV}
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remove_uninstall() {
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rm -f ${BIN_DIR}/${UNINSTALL_K3S_SH}
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}
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trap remove_uninstall EXIT
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if ls ${SYSTEMD_DIR}/k3s*.service >/dev/null 2>&1; then
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if (ls ${SYSTEMD_DIR}/k3s*.service || ls /etc/init.d/k3s*) >/dev/null 2>&1; then
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set +x; echo "Additional k3s services installed, skipping uninstall of k3s"; set -x
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exit
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fi
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@ -369,22 +401,22 @@ EOF
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systemd_disable() {
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$SUDO rm -f /etc/systemd/system/${SERVICE_K3S} || true
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$SUDO rm -f /etc/systemd/system/${SERVICE_K3S}.env || true
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$SUDO systemctl disable ${SYSTEMD_NAME} >/dev/null 2>&1 || true
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$SUDO systemctl disable ${SYSTEM_NAME} >/dev/null 2>&1 || true
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}
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# --- capture current env and create file containing k3s_ variables ---
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create_env_file() {
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info "systemd: Creating environment file ${SYSTEMD_DIR}/${SERVICE_K3S}.env"
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info "env: Creating environment file ${FILE_K3S_ENV}"
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UMASK=`umask`
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umask 0377
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env | grep '^K3S_' | $SUDO tee ${SYSTEMD_DIR}/${SERVICE_K3S}.env >/dev/null
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env | grep '^K3S_' | $SUDO tee ${FILE_K3S_ENV} >/dev/null
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umask $UMASK
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}
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# --- write service file ---
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create_service_file() {
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info "systemd: Creating service file ${SYSTEMD_DIR}/${SERVICE_K3S}"
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$SUDO tee ${SYSTEMD_DIR}/${SERVICE_K3S} >/dev/null << EOF
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# --- write systemd service file ---
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create_systemd_service_file() {
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info "systemd: Creating service file ${FILE_K3S_SERVICE}"
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$SUDO tee ${FILE_K3S_SERVICE} >/dev/null << EOF
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[Unit]
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Description=Lightweight Kubernetes
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Documentation=https://k3s.io
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@ -392,7 +424,7 @@ After=network.target
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[Service]
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Type=${SYSTEMD_TYPE}
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EnvironmentFile=${SYSTEMD_DIR}/${SERVICE_K3S}.env
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EnvironmentFile=${FILE_K3S_ENV}
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ExecStartPre=-/sbin/modprobe br_netfilter
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ExecStartPre=-/sbin/modprobe overlay
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ExecStart=${BIN_DIR}/k3s ${CMD_K3S_EXEC}
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@ -409,19 +441,100 @@ WantedBy=multi-user.target
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EOF
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}
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# --- enable and start systemd service ---
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systemd_enable_and_start() {
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info "systemd: Enabling ${SYSTEMD_NAME} unit"
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$SUDO systemctl enable ${SYSTEMD_DIR}/${SERVICE_K3S} >/dev/null
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$SUDO systemctl daemon-reload >/dev/null
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# --- write openrc service file ---
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create_openrc_service_file() {
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LOG_FILE=/var/log/${SYSTEM_NAME}.log
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info "systemd: Starting ${SYSTEMD_NAME}"
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$SUDO systemctl restart ${SYSTEMD_NAME}
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info "openrc: Creating service file ${FILE_K3S_SERVICE}"
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$SUDO tee ${FILE_K3S_SERVICE} >/dev/null << EOF
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#!/sbin/openrc-run
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depend() {
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after net-online
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need net
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}
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start_pre() {
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rm -f /tmp/k3s.*
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}
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supervisor=supervise-daemon
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name="${SYSTEM_NAME}"
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command="${BIN_DIR}/k3s"
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command_args="${CMD_K3S_EXEC} >>${LOG_FILE} 2>&1"
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pidfile="/var/run/${SYSTEM_NAME}.pid"
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respawn_delay=5
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set -o allexport
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if [ -f /etc/environment ]; then source /etc/environment; fi
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if [ -f ${FILE_K3S_ENV} ]; then source ${FILE_K3S_ENV}; fi
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set +o allexport
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EOF
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$SUDO chmod 0755 ${FILE_K3S_SERVICE}
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$SUDO tee /etc/logrotate.d/${SYSTEM_NAME} >/dev/null << EOF
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${LOG_FILE} {
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missingok
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notifempty
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copytruncate
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}
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EOF
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}
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# --- write systemd or openrc service file ---
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create_service_file() {
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[ "${HAS_SYSTEMD}" = "true" ] && create_systemd_service_file
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[ "${HAS_OPENRC}" = "true" ] && create_openrc_service_file
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}
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# --- get hashes of the current k3s bin and service files
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get_installed_hashes() {
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sha256sum ${BIN_DIR}/k3s ${FILE_K3S_SERVICE} ${FILE_K3S_ENV} 2>&1 || true
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}
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# --- enable and start systemd service ---
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systemd_enable() {
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info "systemd: Enabling ${SYSTEM_NAME} unit"
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$SUDO systemctl enable ${FILE_K3S_SERVICE} >/dev/null
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$SUDO systemctl daemon-reload >/dev/null
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}
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systemd_start() {
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info "systemd: Starting ${SYSTEM_NAME}"
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$SUDO systemctl restart ${SYSTEM_NAME}
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}
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# --- enable and start openrc service ---
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openrc_enable() {
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info "openrc: Enabling ${SYSTEM_NAME} service for default runlevel"
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$SUDO rc-update add ${SYSTEM_NAME} default >/dev/null
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}
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openrc_start() {
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info "openrc: Starting ${SYSTEM_NAME}"
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$SUDO ${FILE_K3S_SERVICE} restart
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}
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# --- startup systemd or openrc service ---
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service_enable_and_start() {
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[ "${HAS_SYSTEMD}" = "true" ] && systemd_enable
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[ "${HAS_OPENRC}" = "true" ] && openrc_enable
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[ "${INSTALL_K3S_SKIP_START}" = "true" ] && return
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POST_INSTALL_HASHES=`get_installed_hashes`
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if [ "${PRE_INSTALL_HASHES}" = "${POST_INSTALL_HASHES}" ]; then
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info "No change detected so skipping service start"
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return
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fi
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[ "${HAS_SYSTEMD}" = "true" ] && systemd_start
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[ "${HAS_OPENRC}" = "true" ] && openrc_start
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}
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# --- run the install process --
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{
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verify_systemd
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verify_system
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setup_env ${INSTALL_K3S_EXEC} $@
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download_and_verify
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create_symlinks
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@ -429,5 +542,5 @@ systemd_enable_and_start() {
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systemd_disable
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create_env_file
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create_service_file
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systemd_enable_and_start
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service_enable_and_start
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}
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