安裝

使用Docker

#先安裝docker curl https://releases.rancher.com/install-docker/19.03.sh | sh#通過--docker指定使用docker curl -sfL https://get.k3s.io | sh -s - --docker

離線安裝

下載這兩個文件： https://hub.fastgit.org/k3s-io/k3s/releases/tag/v1.21.7%2Bk3s1然后執行安裝腳本，跳過下載 INSTALL_K3S_SKIP_DOWNLOAD=true ./install.sh

卸載

已經添加到了環境變量中，所以可以直接使用卸載腳本

k3s-uninstall.sh #或是以下命令 k3s-agent-uninstall.sh

附安裝腳本

#!/bin/sh set -e set -o noglob# 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_FORCE_RESTART # If set to true will always restart the K3s service # # - 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 ($@). # # The following commands result in the same behavior: # curl ... | INSTALL_K3S_EXEC="--disable=traefik" sh -s - # curl ... | INSTALL_K3S_EXEC="server --disable=traefik" sh -s - # curl ... | INSTALL_K3S_EXEC="server" sh -s - --disable=traefik # curl ... | sh -s - server --disable=traefik # curl ... | sh -s - --disable=traefik # # - INSTALL_K3S_NAME # Name of systemd service to create, will default from the k3s exec command # if not specified. If specified the name will be prefixed with 'k3s-'. # # - INSTALL_K3S_TYPE # Type of systemd service to create, will default from the k3s exec command # if not specified. # # - INSTALL_K3S_SELINUX_WARN # If set to true will continue if k3s-selinux policy is not found. # # - INSTALL_K3S_SKIP_SELINUX_RPM # If set to true will skip automatic installation of the k3s RPM. # # - INSTALL_K3S_CHANNEL_URL # Channel URL for fetching k3s download URL. # Defaults to 'https://update.k3s.io/v1-release/channels'. # # - INSTALL_K3S_CHANNEL # Channel to use for fetching k3s download URL. # Defaults to 'stable'.GITHUB_URL=https://github.com/k3s-io/k3s/releases STORAGE_URL=https://storage.googleapis.com/k3s-ci-builds DOWNLOADER=# --- helper functions for logs --- info() {echo '[INFO] ' "$@" } warn() {echo '[WARN] ' "$@" >&2 } fatal() {echo '[ERROR] ' "$@" >&2exit 1 }# --- fatal if no systemd or openrc --- verify_system() {if [ -x /sbin/openrc-run ]; thenHAS_OPENRC=truereturnfiif [ -x /bin/systemctl ] || type systemctl > /dev/null 2>&1; thenHAS_SYSTEMD=truereturnfifatal 'Can not find systemd or openrc to use as a process supervisor for k3s' }# --- add quotes to command arguments --- quote() {for arg in "$@"; doprintf '%s\n' "$arg" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/'/"done }# --- add indentation and trailing slash to quoted args --- quote_indent() {printf ' \\\n'for arg in "$@"; doprintf '\t%s \\\n' "$(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' }# --- ensures $K3S_URL is empty or begins with https://, exiting fatally otherwise --- verify_k3s_url() {case "${K3S_URL}" in"");;https://*);;*)fatal "Only https:// URLs are supported for K3S_URL (have ${K3S_URL})";;esac }# --- 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}" ]; thenCMD_K3S=serverelseif [ -z "${K3S_TOKEN}" ] && [ -z "${K3S_TOKEN_FILE}" ] && [ -z "${K3S_CLUSTER_SECRET}" ]; thenfatal "Defaulted k3s exec command to 'agent' because K3S_URL is defined, but K3S_TOKEN, K3S_TOKEN_FILE or K3S_CLUSTER_SECRET is not defined."fiCMD_K3S=agentfi;;# --- command is provided ---(*)CMD_K3S=$1shift;;esacverify_k3s_urlCMD_K3S_EXEC="${CMD_K3S}$(quote_indent "$@")"# --- use systemd name if defined or create default ---if [ -n "${INSTALL_K3S_NAME}" ]; thenSYSTEM_NAME=k3s-${INSTALL_K3S_NAME}elseif [ "${CMD_K3S}" = server ]; thenSYSTEM_NAME=k3selseSYSTEM_NAME=k3s-${CMD_K3S}fifi# --- check for invalid characters in system name ---valid_chars=$(printf '%s' "${SYSTEM_NAME}" | sed -e 's/[][!#$%&()*;<=>?\_`{|}/[:space:]]/^/g;' )if [ "${SYSTEM_NAME}" != "${valid_chars}" ]; theninvalid_chars=$(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=sudoif [ $(id -u) -eq 0 ]; thenSUDO=fi# --- use systemd type if defined or create default ---if [ -n "${INSTALL_K3S_TYPE}" ]; thenSYSTEMD_TYPE=${INSTALL_K3S_TYPE}elseif [ "${CMD_K3S}" = server ]; thenSYSTEMD_TYPE=notifyelseSYSTEMD_TYPE=execfifi# --- use binary install directory if defined or create default ---if [ -n "${INSTALL_K3S_BIN_DIR}" ]; thenBIN_DIR=${INSTALL_K3S_BIN_DIR}else# --- use /usr/local/bin if root can write to it, otherwise use /opt/bin if it existsBIN_DIR=/usr/local/binif ! $SUDO sh -c "touch ${BIN_DIR}/k3s-ro-test && rm -rf ${BIN_DIR}/k3s-ro-test"; thenif [ -d /opt/bin ]; thenBIN_DIR=/opt/binfififi# --- use systemd directory if defined or create default ---if [ -n "${INSTALL_K3S_SYSTEMD_DIR}" ]; thenSYSTEMD_DIR="${INSTALL_K3S_SYSTEMD_DIR}"elseSYSTEMD_DIR=/etc/systemd/systemfi# --- set related files from system name ---SERVICE_K3S=${SYSTEM_NAME}.serviceUNINSTALL_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 ]; thenFILE_K3S_SERVICE=${SYSTEMD_DIR}/${SERVICE_K3S}FILE_K3S_ENV=${SYSTEMD_DIR}/${SERVICE_K3S}.envelif [ "${HAS_OPENRC}" = true ]; then$SUDO mkdir -p /etc/rancher/k3sFILE_K3S_SERVICE=/etc/init.d/${SYSTEM_NAME}FILE_K3S_ENV=/etc/rancher/k3s/${SYSTEM_NAME}.envfi# --- 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 ]; thenINSTALL_K3S_SKIP_DOWNLOAD=truefi# --- setup channel valuesINSTALL_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 ]; thenreturn 1fi }# --- verify an executable k3s binary is installed --- verify_k3s_is_executable() {if [ ! -x ${BIN_DIR}/k3s ]; thenfatal "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" ]; thenARCH=$(uname -m)ficase $ARCH inamd64)ARCH=amd64SUFFIX=;;x86_64)ARCH=amd64SUFFIX=;;arm64)ARCH=arm64SUFFIX=-${ARCH};;aarch64)ARCH=arm64SUFFIX=-${ARCH};;arm*)ARCH=armSUFFIX=-${ARCH}hf;;*)fatal "Unsupported architecture $ARCH"esac }# --- verify existence of network downloader executable --- verify_downloader() {# Return failure if it doesn't exist or is no executable[ -x "$(command -v $1)" ] || return 1# Set verified executable as our downloader program and return successDOWNLOADER=$1return 0 }# --- create temporary directory and cleanup when done --- setup_tmp() {TMP_DIR=$(mktemp -d -t k3s-install.XXXXXXXXXX)TMP_HASH=${TMP_DIR}/k3s.hashTMP_BIN=${TMP_DIR}/k3s.bincleanup() {code=$?set +etrap - EXITrm -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}" ]; thenVERSION_K3S="commit ${INSTALL_K3S_COMMIT}"elif [ -n "${INSTALL_K3S_VERSION}" ]; thenVERSION_K3S=${INSTALL_K3S_VERSION}elseinfo "Finding release for channel ${INSTALL_K3S_CHANNEL}"version_url="${INSTALL_K3S_CHANNEL_URL}/${INSTALL_K3S_CHANNEL}"case $DOWNLOADER incurl)VERSION_K3S=$(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'";;esacfiinfo "Using ${VERSION_K3S} as release" }# --- download from github url --- download() {[ $# -eq 2 ] || fatal 'download needs exactly 2 arguments'case $DOWNLOADER incurl)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}" ]; thenHASH_URL=${STORAGE_URL}/k3s${SUFFIX}-${INSTALL_K3S_COMMIT}.sha256sumelseHASH_URL=${GITHUB_URL}/download/${VERSION_K3S}/sha256sum-${ARCH}.txtfiinfo "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 ${BIN_DIR}/k3s ]; thenHASH_INSTALLED=$(sha256sum ${BIN_DIR}/k3s)HASH_INSTALLED=${HASH_INSTALLED%%[[:blank:]]*}if [ "${HASH_EXPECTED}" = "${HASH_INSTALLED}" ]; thenreturnfifireturn 1 }# --- download binary from github url --- download_binary() {if [ -n "${INSTALL_K3S_COMMIT}" ]; thenBIN_URL=${STORAGE_URL}/k3s${SUFFIX}-${INSTALL_K3S_COMMIT}elseBIN_URL=${GITHUB_URL}/download/${VERSION_K3S}/k3s${SUFFIX}fiinfo "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}" ]; thenfatal "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() {case ${INSTALL_K3S_CHANNEL} in *testing)rpm_channel=testing;;*latest)rpm_channel=latest;;*)rpm_channel=stable;;esacrpm_site="rpm.rancher.io"if [ "${rpm_channel}" = "testing" ]; thenrpm_site="rpm-testing.rancher.io"fi[ -r /etc/os-release ] && . /etc/os-releaseif [ "${ID_LIKE%%[ ]*}" = "suse" ]; thenrpm_target=slerpm_site_infix=microospackage_installer=zypperelif [ "${VERSION_ID%%.*}" = "7" ]; thenrpm_target=el7rpm_site_infix=centos/7package_installer=yumelserpm_target=el8rpm_site_infix=centos/8package_installer=yumfiif [ "${package_installer}" = "yum" ] && [ -x /usr/bin/dnf ]; thenpackage_installer=dnffipolicy_hint="please install:${package_installer} install -y container-selinux${package_installer} install -y https://${rpm_site}/k3s/${rpm_channel}/common/${rpm_site_infix}/noarch/k3s-selinux-0.4-1.${rpm_target}.noarch.rpm "if [ "$INSTALL_K3S_SKIP_SELINUX_RPM" = true ] || can_skip_download || [ ! -d /usr/share/selinux ]; theninfo "Skipping installation of SELinux RPM"elif [ "${ID_LIKE:-}" != coreos ] && [ "${VARIANT_ID:-}" != coreos ]; theninstall_selinux_rpm ${rpm_site} ${rpm_channel} ${rpm_target} ${rpm_site_infix}fipolicy_error=fatalif [ "$INSTALL_K3S_SELINUX_WARN" = true ] || [ "${ID_LIKE:-}" = coreos ] || [ "${VARIANT_ID:-}" = coreos ]; thenpolicy_error=warnfiif ! $SUDO chcon -u system_u -r object_r -t container_runtime_exec_t ${BIN_DIR}/k3s >/dev/null 2>&1; thenif $SUDO grep '^\s*SELINUX=enforcing' /etc/selinux/config >/dev/null 2>&1; then$policy_error "Failed to apply container_runtime_exec_t to ${BIN_DIR}/k3s, ${policy_hint}"fielif [ ! -f /usr/share/selinux/packages/k3s.pp ]; thenif [ -x /usr/sbin/transactional-update ]; thenwarn "Please reboot your machine to activate the changes and avoid data loss."else$policy_error "Failed to find the k3s-selinux policy, ${policy_hint}"fifi }install_selinux_rpm() {if [ -r /etc/redhat-release ] || [ -r /etc/centos-release ] || [ -r /etc/oracle-release ] || [ "${ID_LIKE%%[ ]*}" = "suse" ]; thenrepodir=/etc/yum.repos.dif [ -d /etc/zypp/repos.d ]; thenrepodir=/etc/zypp/repos.dfiset +o noglob$SUDO rm -f ${repodir}/rancher-k3s-common*.reposet -o noglobif [ -r /etc/redhat-release ] && [ "${3}" = "el7" ]; then$SUDO yum install -y yum-utils$SUDO yum-config-manager --enable rhel-7-server-extras-rpmsfi$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 EOFcase ${3} insle)rpm_installer="zypper --gpg-auto-import-keys"if [ "${TRANSACTIONAL_UPDATE=false}" != "true" ] && [ -x /usr/sbin/transactional-update ]; thenrpm_installer="transactional-update --no-selfupdate -d run ${rpm_installer}": "${INSTALL_K3S_SKIP_START:=true}"fi;;*)rpm_installer="yum";;esacif [ "${rpm_installer}" = "yum" ] && [ -x /usr/bin/dnf ]; thenrpm_installer=dnffi# shellcheck disable=SC2086$SUDO ${rpm_installer} install -y "k3s-selinux"fireturn }# --- download and verify k3s --- download_and_verify() {if can_skip_download; theninfo 'Skipping k3s download and verify'verify_k3s_is_executablereturnfisetup_verify_archverify_downloader curl || verify_downloader wget || fatal 'Can not find curl or wget for downloading files'setup_tmpget_release_versiondownload_hashif installed_hash_matches; theninfo 'Skipping binary downloaded, installed k3s matches hash'returnfidownload_binaryverify_binarysetup_binary }# --- add additional utility links --- create_symlinks() {[ "${INSTALL_K3S_BIN_DIR_READ_ONLY}" = true ] && return[ "${INSTALL_K3S_SYMLINK}" = skip ] && returnfor cmd in kubectl crictl ctr; doif [ ! -e ${BIN_DIR}/${cmd} ] || [ "${INSTALL_K3S_SYMLINK}" = force ]; thenwhich_cmd=$(command -v ${cmd} 2>/dev/null || true)if [ -z "${which_cmd}" ] || [ "${INSTALL_K3S_SYMLINK}" = force ]; theninfo "Creating ${BIN_DIR}/${cmd} symlink to k3s"$SUDO ln -sf k3s ${BIN_DIR}/${cmd}elseinfo "Skipping ${BIN_DIR}/${cmd} symlink to k3s, command exists in PATH at ${which_cmd}"fielseinfo "Skipping ${BIN_DIR}/${cmd} symlink to k3s, already exists"fidone }# --- create killall script --- create_killall() {[ "${INSTALL_K3S_BIN_DIR_READ_ONLY}" = true ] && returninfo "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 doneset -xfor service in /etc/systemd/system/k3s*.service; do[ -s $service ] && systemctl stop $(basename $service) donefor service in /etc/init.d/k3s*; do[ -x $service ] && $service stop donepschildren() {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 $@; doecho $pidfor child in $(pschildren $pid); dopstree $childdonedone }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 $({ set +x; } 2>/dev/null; getshims; set -x)do_unmount_and_remove() {set +xwhile read -r _ path _; docase "$path" in $1*) echo "$path" ;; esacdone < /proc/self/mounts | sort -r | xargs -r -t -n 1 sh -c 'umount "$0" && rm -rf "$0"'set -x }do_unmount_and_remove '/run/k3s' do_unmount_and_remove '/var/lib/rancher/k3s' do_unmount_and_remove '/var/lib/kubelet/pods' do_unmount_and_remove '/var/lib/kubelet/plugins' do_unmount_and_remove '/run/netns/cni-'# Remove CNI namespaces ip netns show 2>/dev/null | grep cni- | xargs -r -t -n 1 ip netns delete# Delete network interface(s) that match 'master cni0' ip link show 2>/dev/null | grep 'master cni0' | while read ignore iface ignore; doiface=${iface%%@*}[ -z "$iface" ] || ip link delete $iface done ip link delete cni0 ip link delete flannel.1 ip link delete flannel-v6.1 rm -rf /var/lib/cni/ iptables-save | grep -v KUBE- | grep -v CNI- | iptables-restore EOF$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 ] && returninfo "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; thensystemctl disable ${SYSTEM_NAME}systemctl reset-failed ${SYSTEM_NAME}systemctl daemon-reload fi if command -v rc-update; thenrc-update delete ${SYSTEM_NAME} default firm -f ${FILE_K3S_SERVICE} rm -f ${FILE_K3S_ENV}remove_uninstall() {rm -f ${UNINSTALL_K3S_SH} } trap remove_uninstall EXITif (ls ${SYSTEMD_DIR}/k3s*.service || ls /etc/init.d/k3s*) >/dev/null 2>&1; thenset +x; echo 'Additional k3s services installed, skipping uninstall of k3s'; set -xexit fifor cmd in kubectl crictl ctr; doif [ -L ${BIN_DIR}/\$cmd ]; thenrm -f ${BIN_DIR}/\$cmdfi donerm -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 ${KILLALL_K3S_SH}if type yum >/dev/null 2>&1; thenyum remove -y k3s-selinuxrm -f /etc/yum.repos.d/rancher-k3s-common*.repo elif type zypper >/dev/null 2>&1; thenuninstall_cmd="zypper remove -y k3s-selinux"if [ "\${TRANSACTIONAL_UPDATE=false}" != "true" ] && [ -x /usr/sbin/transactional-update ]; thenuninstall_cmd="transactional-update --no-selfupdate -d run \$uninstall_cmd"fi\$uninstall_cmdrm -f /etc/zypp/repos.d/rancher-k3s-common*.repo fi EOF$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/nullsh -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}.loginfo "openrc: Creating service file ${FILE_K3S_SERVICE}"$SUDO tee ${FILE_K3S_SERVICE} >/dev/null << EOF #!/sbin/openrc-rundepend() {after network-onlinewant cgroups }start_pre() {rm -f /tmp/k3s.* }supervisor=supervise-daemon name=${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=0set -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 ${LOG_FILE} {missingoknotifemptycopytruncate } EOF }# --- write systemd or openrc service file --- create_service_file() {[ "${HAS_SYSTEMD}" = true ] && create_systemd_service_file[ "${HAS_OPENRC}" = true ] && create_openrc_service_filereturn 0 }# --- get hashes of the current k3s bin and service files get_installed_hashes() {$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 $enabled; done)" -eq 0 ];theninfo 'Failed to find memory cgroup, you may need to add "cgroup_memory=1 cgroup_enable=memory" to your linux cmdline (/boot/cmdline.txt on a Raspberry Pi)'fi[ "${INSTALL_K3S_SKIP_ENABLE}" = true ] && return[ "${HAS_SYSTEMD}" = true ] && systemd_enable[ "${HAS_OPENRC}" = true ] && openrc_enable[ "${INSTALL_K3S_SKIP_START}" = true ] && returnPOST_INSTALL_HASHES=$(get_installed_hashes)if [ "${PRE_INSTALL_HASHES}" = "${POST_INSTALL_HASHES}" ] && [ "${INSTALL_K3S_FORCE_RESTART}" != true ]; theninfo 'No change detected so skipping service start'returnfi[ "${HAS_SYSTEMD}" = true ] && systemd_start[ "${HAS_OPENRC}" = true ] && openrc_startreturn 0 }# --- re-evaluate args to include env command --- eval set -- $(escape "${INSTALL_K3S_EXEC}") $(quote "$@")# --- run the install process -- {verify_systemsetup_env "$@"download_and_verifysetup_selinuxcreate_symlinkscreate_killallcreate_uninstallsystemd_disablecreate_env_filecreate_service_fileservice_enable_and_start }

參考鏈接：https://docs.rancher.cn/docs/k3s/installation/airgap/_index/

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