mirror of https://github.com/easzlab/kubeasz.git
331 lines
12 KiB
Bash
331 lines
12 KiB
Bash
#!/bin/bash
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#--------------------------------------------------
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# This script is for:
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# 1. to download the scripts/binaries/images needed for installing a k8s cluster with kubeasz
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# 2. to run kubeasz in a container
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# @author: gjmzj
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# @usage: ./easzup
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# @repo: https://github.com/easzlab/kubeasz
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# @ref: https://github.com/kubeasz/dockerfiles
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#--------------------------------------------------
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set -o nounset
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set -o errexit
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#set -o xtrace
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# default version, can be overridden by cmd line options
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export DOCKER_VER=18.09.6
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export KUBEASZ_VER=2.0.0
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export K8S_BIN_VER=v1.14.3
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export EXT_BIN_VER=0.3.0
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export SYS_PKG_VER=0.2.1
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function install_docker() {
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# check if a container runtime is already installed
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systemctl status docker|grep Active|grep -q running && { echo "[WARN] docker is already running."; return 0; }
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systemctl status containerd|grep Active|grep -q running && { echo "[ERROR] containerd is running, unsupported."; exit 1; }
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DOCKER_URL=https://mirrors.tuna.tsinghua.edu.cn/docker-ce/linux/static/stable/x86_64/docker-${DOCKER_VER}.tgz
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mkdir -p /opt/kube/bin /etc/docker /etc/ansible/down
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if [[ -f "/etc/ansible/down/docker-${DOCKER_VER}.tgz" ]];then
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echo "[INFO] docker binaries already existed"
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else
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echo -e "[INFO] \033[33mdownloading docker binaries\033[0m $DOCKER_VER"
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curl -C- -O --retry 3 "$DOCKER_URL" || { echo "[ERROR] downloading docker failed"; exit 1; }
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mv ./docker-${DOCKER_VER}.tgz /etc/ansible/down
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fi
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tar zxf /etc/ansible/down/docker-${DOCKER_VER}.tgz -C /etc/ansible/down && \
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mv /etc/ansible/down/docker/* /opt/kube/bin && \
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ln -sf /opt/kube/bin/docker /bin/docker
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echo "[INFO] generate docker service file"
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cat > /etc/systemd/system/docker.service << EOF
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[Unit]
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Description=Docker Application Container Engine
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Documentation=http://docs.docker.io
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[Service]
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Environment="PATH=/opt/kube/bin:/bin:/sbin:/usr/bin:/usr/sbin"
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ExecStart=/opt/kube/bin/dockerd
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ExecStartPost=/sbin/iptables -I FORWARD -s 0.0.0.0/0 -j ACCEPT
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ExecReload=/bin/kill -s HUP \$MAINPID
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Restart=on-failure
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RestartSec=5
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LimitNOFILE=infinity
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LimitNPROC=infinity
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LimitCORE=infinity
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Delegate=yes
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KillMode=process
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[Install]
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WantedBy=multi-user.target
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EOF
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echo "[INFO] generate docker config file"
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cat > /etc/docker/daemon.json << EOF
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{
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"registry-mirrors": [
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"https://dockerhub.azk8s.cn",
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"https://docker.mirrors.ustc.edu.cn",
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"http://hub-mirror.c.163.com"
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],
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"max-concurrent-downloads": 10,
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"log-driver": "json-file",
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"log-level": "warn",
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"log-opts": {
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"max-size": "10m",
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"max-file": "3"
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},
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"data-root": "/var/lib/docker"
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}
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EOF
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if [[ -e /etc/centos-release || -e /etc/redhat-release ]]; then
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echo "[INFO] turn off selinux in CentOS/Redhat"
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setenforce 0
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echo "SELINUX=disabled" > /etc/selinux/config
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fi
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echo "[INFO] enable and start docker"
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systemctl enable docker
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systemctl daemon-reload && systemctl restart docker && sleep 8
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}
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function get_kubeasz() {
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# check if kubeasz already existed
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[[ -d "/etc/ansible/roles/kube-node" ]] && { echo "[WARN] kubeasz already existed"; return 0; }
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echo -e "[INFO] \033[33mdownloading kubeasz\033[0m $KUBEASZ_VER" && \
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docker pull easzlab/kubeasz:${KUBEASZ_VER} && \
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echo "[INFO] run a temporary container" && \
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docker run -d --name temp_easz easzlab/kubeasz:${KUBEASZ_VER} && \
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mv "/etc/ansible/down/docker-${DOCKER_VER}.tgz" /tmp && \
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rm -rf /etc/ansible && \
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echo "[INFO] cp kubeasz code from the temporary container" && \
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docker cp temp_easz:/etc/ansible /etc/ansible && \
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echo "[INFO] stop&remove temporary container" && \
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docker rm -f temp_easz && \
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mv "/tmp/docker-${DOCKER_VER}.tgz" /etc/ansible/down
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}
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function get_k8s_bin() {
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[[ -f "/etc/ansible/bin/kubelet" ]] && { echo "[WARN] kubernetes binaries existed"; return 0; }
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echo -e "[INFO] \033[33mdownloading kubernetes\033[0m $K8S_BIN_VER binaries"
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docker pull easzlab/kubeasz-k8s-bin:${K8S_BIN_VER} && \
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echo "[INFO] run a temporary container" && \
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docker run -d --name temp_k8s_bin easzlab/kubeasz-k8s-bin:${K8S_BIN_VER} && \
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echo "[INFO] cp k8s binaries" && \
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docker cp temp_k8s_bin:/k8s /k8s_bin_tmp && \
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mv /k8s_bin_tmp/* /etc/ansible/bin && \
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echo "[INFO] stop&remove temporary container" && \
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docker rm -f temp_k8s_bin && \
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rm -rf /k8s_bin_tmp
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}
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function get_ext_bin() {
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[[ -f "/etc/ansible/bin/etcdctl" ]] && { echo "[WARN] extral binaries existed"; return 0; }
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echo -e "[INFO] \033[33mdownloading extral binaries\033[0m kubeasz-ext-bin:$EXT_BIN_VER"
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docker pull easzlab/kubeasz-ext-bin:${EXT_BIN_VER} && \
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echo "[INFO] run a temporary container" && \
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docker run -d --name temp_ext_bin easzlab/kubeasz-ext-bin:${EXT_BIN_VER} && \
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echo "[INFO] cp extral binaries" && \
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docker cp temp_ext_bin:/extra /extra_bin_tmp && \
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mv /extra_bin_tmp/* /etc/ansible/bin && \
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echo "[INFO] stop&remove temporary container" && \
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docker rm -f temp_ext_bin && \
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rm -rf /extra_bin_tmp
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}
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function get_sys_pkg() {
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[[ -f "/etc/ansible/down/packages/chrony_xenial.tar.gz" ]] && { echo "[WARN] system packages existed"; return 0; }
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echo -e "[INFO] \033[33mdownloading system packages\033[0m kubeasz-sys-pkg:$SYS_PKG_VER"
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docker pull easzlab/kubeasz-sys-pkg:${SYS_PKG_VER} && \
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echo "[INFO] run a temporary container" && \
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docker run -d --name temp_sys_pkg easzlab/kubeasz-sys-pkg:${SYS_PKG_VER} && \
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echo "[INFO] cp system packages" && \
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docker cp temp_sys_pkg:/packages /etc/ansible/down && \
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echo "[INFO] stop&remove temporary container" && \
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docker rm -f temp_sys_pkg
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}
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function get_offline_image() {
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# images needed by k8s cluster
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calicoVer=v3.4.4
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corednsVer=1.5.0
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dashboardVer=v1.10.1
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flannelVer=v0.11.0-amd64
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heapsterVer=v1.5.4
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metricsVer=v0.3.3
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pauseVer=3.1
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traefikVer=v1.7.12
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imageDir=/etc/ansible/down
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[[ -d "$imageDir" ]] || { echo "[ERROR] $imageDir not existed!"; exit 1; }
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echo -e "[INFO] \033[33mdownloading offline images\033[0m"
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if [[ ! -f "$imageDir/calico_$calicoVer.tar" ]];then
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docker pull calico/cni:${calicoVer} && \
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docker pull calico/kube-controllers:${calicoVer} && \
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docker pull calico/node:${calicoVer} && \
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docker save -o ${imageDir}/calico_${calicoVer}.tar calico/cni:${calicoVer} calico/kube-controllers:${calicoVer} calico/node:${calicoVer}
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fi
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if [[ ! -f "$imageDir/coredns_$corednsVer.tar" ]];then
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docker pull coredns/coredns:${corednsVer} && \
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docker save -o ${imageDir}/coredns_${corednsVer}.tar coredns/coredns:${corednsVer}
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fi
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if [[ ! -f "$imageDir/dashboard_$dashboardVer.tar" ]];then
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docker pull mirrorgooglecontainers/kubernetes-dashboard-amd64:${dashboardVer} && \
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docker save -o ${imageDir}/dashboard_${dashboardVer}.tar mirrorgooglecontainers/kubernetes-dashboard-amd64:${dashboardVer}
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fi
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if [[ ! -f "$imageDir/flannel_$flannelVer.tar" ]];then
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docker pull easzlab/flannel:${flannelVer} && \
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docker save -o ${imageDir}/flannel_${flannelVer}.tar easzlab/flannel:${flannelVer}
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fi
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if [[ ! -f "$imageDir/heapster_$heapsterVer.tar" ]];then
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docker pull mirrorgooglecontainers/heapster-amd64:${heapsterVer} && \
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docker save -o ${imageDir}/heapster_${heapsterVer}.tar mirrorgooglecontainers/heapster-amd64:${heapsterVer}
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fi
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if [[ ! -f "$imageDir/metrics-server_$metricsVer.tar" ]];then
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docker pull mirrorgooglecontainers/metrics-server-amd64:${metricsVer} && \
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docker save -o ${imageDir}/metrics-server_${metricsVer}.tar mirrorgooglecontainers/metrics-server-amd64:${metricsVer}
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fi
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if [[ ! -f "$imageDir/pause_$pauseVer.tar" ]];then
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docker pull mirrorgooglecontainers/pause-amd64:${pauseVer} && \
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docker save -o ${imageDir}/pause_${pauseVer}.tar mirrorgooglecontainers/pause-amd64:${pauseVer}
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fi
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if [[ ! -f "$imageDir/traefik_$traefikVer.tar" ]];then
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docker pull traefik:${traefikVer} && \
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docker save -o ${imageDir}/traefik_${traefikVer}.tar traefik:${traefikVer}
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fi
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if [[ ! -f "$imageDir/kubeasz_$KUBEASZ_VER.tar" ]];then
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docker pull easzlab/kubeasz:${KUBEASZ_VER} && \
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docker save -o ${imageDir}/kubeasz_${KUBEASZ_VER}.tar easzlab/kubeasz:${KUBEASZ_VER}
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fi
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}
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function download_all() {
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install_docker && \
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get_kubeasz && \
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get_k8s_bin && \
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get_ext_bin && \
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get_sys_pkg && \
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get_offline_image
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}
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function start_kubeasz_docker() {
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[[ -d "/etc/ansible/roles/kube-node" ]] || { echo "[ERROR] not initialized. try 'easzup -D' first."; exit 1; }
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# get host's IP
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host_if=$(ip route|grep default|cut -d' ' -f5)
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host_ip=$(ip a|grep "$host_if$"|awk '{print $2}'|cut -d'/' -f1)
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echo "[INFO] get host IP: $host_ip"
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# allow ssh login using key locally
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if [[ ! -e /root/.ssh/id_rsa ]]; then
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echo "[INFO] generate ssh key pair"
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ssh-keygen -t rsa -b 2048 -N '' -f /root/.ssh/id_rsa > /dev/null
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cat /root/.ssh/id_rsa.pub >> /root/.ssh/authorized_keys
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ssh-keyscan -t ecdsa -H "$host_ip" >> /root/.ssh/known_hosts
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fi
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# create a link '/usr/bin/python' in Ubuntu1604
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if [[ ! -e /usr/bin/python && -e /etc/debian_version ]]; then
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echo "[INFO] create a soft link '/usr/bin/python'"
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ln -s /usr/bin/python3 /usr/bin/python
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fi
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#
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docker load -i /etc/ansible/down/kubeasz_${KUBEASZ_VER}.tar
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# run kubeasz docker container
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echo "[INFO] run kubeasz in a container"
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docker run --detach \
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--name kubeasz \
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--restart always \
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--env HOST_IP="$host_ip" \
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--volume /etc/ansible:/etc/ansible \
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--volume /root/.kube:/root/.kube \
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--volume /root/.ssh/id_rsa:/root/.ssh/id_rsa:ro \
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--volume /root/.ssh/id_rsa.pub:/root/.ssh/id_rsa.pub:ro \
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--volume /root/.ssh/known_hosts:/root/.ssh/known_hosts:ro \
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easzlab/kubeasz:${KUBEASZ_VER}
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}
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function clean_container() {
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echo "[INFO] clean all running containers"
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docker ps -a|awk 'NR>1{print $1}'|xargs docker rm -f
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}
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function usage() {
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cat <<EOF
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Usage: easzup [options] [args]
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option: -{DdekSz}
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-C stop&clean all local containers
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-D download all into /etc/ansible
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-S start kubeasz in a container
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-d <ver> set docker-ce version, default "$DOCKER_VER"
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-e <ver> set kubeasz-ext-bin version, default "$EXT_BIN_VER"
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-k <ver> set kubeasz-k8s-bin version, default "$K8S_BIN_VER"
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-p <ver> set kubeasz-sys-pkg version, default "$SYS_PKG_VER"
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-z <ver> set kubeasz version, default "$KUBEASZ_VER"
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see more at https://github.com/kubeasz/dockerfiles
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EOF
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}
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### Main Lines ##################################################
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function main() {
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# check if use bash shell
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readlink /proc/$$/exe|grep -q "dash" && { echo "[ERROR] you should use bash shell, not sh"; exit 1; }
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# check if use with root
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[[ "$EUID" -ne 0 ]] && { echo "[ERROR] you should run this script as root"; exit 1; }
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[[ "$#" -eq 0 ]] && { usage >&2; exit 1; }
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ACTION=""
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while getopts "CDSd:e:k:p:z:" OPTION; do
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case "$OPTION" in
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C)
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ACTION="clean_container"
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;;
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D)
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ACTION="download_all"
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;;
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S)
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ACTION="start_kubeasz_docker"
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;;
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d)
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export DOCKER_VER="$OPTARG"
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;;
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e)
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export EXT_BIN_VER="$OPTARG"
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;;
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k)
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export K8S_BIN_VER="$OPTARG"
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;;
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p)
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export K8S_SYS_PKG="$OPTARG"
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;;
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z)
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export KUBEASZ_VER="$OPTARG"
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;;
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?)
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usage
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exit 1
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;;
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esac
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done
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[[ "$ACTION" == "" ]] && { echo "[ERROR] illegal option"; usage; exit 1; }
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# excute cmd "$ACTION"
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echo -e "[INFO] \033[33mAction begin\033[0m : $ACTION"
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${ACTION} || { echo -e "[ERROR] \033[31mAction failed\033[0m : $ACTION"; return 1; }
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echo -e "[INFO] \033[32mAction successed\033[0m : $ACTION"
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}
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main "$@"
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