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kubernetes 单机安装

本贴最后更新于 2203 天前，其中的信息可能已经时过境迁

服务器规划

角色 IP 环境
MASTER 192.168.112.110 kube-apiserver，kube-controller-manager，kube-scheduler，etcd
NODE 192.168.112.110 kubelet，kube-proxy，docker，flannel

安装 etcd

1.检测防火墙

# systemctl disable firewalld
# systemctl stop firewalld

2.安装 etcd 服务

# mkdir -p /var/lib/etcd && mv etcd/{etcd,etcdctl} /usr/bin/
# vi /usr/lib/systemd/system/etcd.service

[Unit]
Description=Etcd Server
After=network.target

[Service]
Type=simple
WorkingDirectory=/var/lib/etcd/ 
EnvironmentFile=-/etc/etcd/etcd.conf
ExecStart=/usr/bin/etcd
Type=notify

[Install]
WantedBy=multi-user.target

# mkdir -p /etc/etcd/ && vi /etc/etcd/etcd.conf

# [member]
ETCD_NAME=etcd1   
ETCD_DATA_DIR="/var/lib/etcd"
ETCD_LISTEN_CLIENT_URLS="http://192.168.112.110:2379,http://127.0.0.1:2379"
ETCD_ADVERTISE_CLIENT_URLS="http://192.168.112.110:2379,http://127.0.0.1:2379"

#[cluster]
ETCD_LISTEN_PEER_URLS="http://192.168.112.110:2380"   
ETCD_INITIAL_ADVERTISE_PEER_URLS="http://192.168.112.110:2380"
ETCD_INITIAL_CLUSTER="etcd1=http://192.168.112.110:2380"
ETCD_INITIAL_CLUSTER_STATE="new"
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster" 

# systemctl daemon-reload
# systemctl enable etcd.service
# systemctl restart etcd
# etcdctl cluster-health

安装 Flannel

etcdctl --endpoints="http://192.168.112.110:2379" set \
/coreos.com/network/config '{ "Network": "10.1.0.0/16", "Backend": {"Type": "vxlan"}}'

# unzip flannel.zip && cd flannel
# mkdir -p /opt/kubernetes/bin && mv flanneld mk-docker-opts.sh /opt/kubernetes/bin

# mkdir -p /opt/kubernetes/cfg/ && vi /opt/kubernetes/cfg/flanneld 

FLANNEL_OPTIONS="--etcd-endpoints=http://192.168.112.110:2379"

配置 flanneld

# vi /usr/lib/systemd/system/flanneld.service

[Unit]
Description=Flanneld overlay address etcd agent
After=network-online.target network.target
Before=docker.service

[Service]
Type=notify
EnvironmentFile=/opt/kubernetes/cfg/flanneld
ExecStart=/opt/kubernetes/bin/flanneld --ip-masq $FLANNEL_OPTIONS
ExecStartPost=/opt/kubernetes/bin/mk-docker-opts.sh -k DOCKER_NETWORK_OPTIONS -d /run/flannel/subnet.env
Restart=on-failure

[Install]
WantedBy=multi-user.target

# mv /usr/lib/systemd/system/docker.service /usr/lib/systemd/system/docker.service.bak

# vi /usr/lib/systemd/system/docker.service 

[Unit]
Description=Docker Application Container Engine
Documentation=https://docs.docker.com
After=network-online.target firewalld.service
Wants=network-online.target

[Service]
Type=notify
EnvironmentFile=/run/flannel/subnet.env
ExecStart=/usr/bin/dockerd $DOCKER_NETWORK_OPTIONS
ExecReload=/bin/kill -s HUP $MAINPID
LimitNOFILE=infinity
LimitNPROC=infinity
LimitCORE=infinity
TimeoutStartSec=0
Delegate=yes
KillMode=process
Restart=on-failure
StartLimitBurst=3
StartLimitInterval=60s

[Install]
WantedBy=multi-user.target

# systemctl daemon-reload
# systemctl start flanneld
# systemctl enable flanneld
# systemctl restart docker

检查是否生效：

# ps -ef |grep docker
# ip addr
# etcdctl ls /coreos.com/network/subnets
# etcdctl get /coreos.com/network/subnets/10.1.22.0-24

安装 MASTER 节点

配置 kube-apiserver

# cp kubernetes/server/bin/{kube-apiserver,kube-scheduler,kubectl,kube-controller-manager} /usr/bin/

# vi /usr/lib/systemd/system/kube-apiserver.service

[Unit]
Description=Kubernetes API Server
Documentation=https://github.com/kubernetes/kubernetes
After=etcd.service
Wants=etcd.service

[Service]
EnvironmentFile=/etc/kubernetes/apiserver
ExecStart=/usr/bin/kube-apiserver $KUBE_API_ARGS
Restart=on-failure
Type=notify
LimitNOFILE=65536

[Install]
WantedBy=multi-user.target

# mkdir -p /etc/kubernetes/ && vi /etc/kubernetes/apiserver

KUBE_API_ARGS="--v=2 \
--logtostderr=false \
--log-dir=/var/log/kubernetes \
--etcd-servers=http://127.0.0.1:2379  \
--insecure-bind-address=0.0.0.0  \
--insecure-port=8080 \
--service-cluster-ip-range=169.169.0.0/16 \
--service-node-port-range=1-65535 \
--admission_control=\
NamespaceLifecycle,LimitRanger,SecurityContextDeny,ServiceAccount,ResourceQuota"


# ServiceAccount

# systemctl daemon-reload
# systemctl enable kube-apiserver
# systemctl restart kube-apiserver
# curl http://192.168.112.110:8080

配置 kube-controller

# vi /usr/lib/systemd/system/kube-controller-manager.service 

[Unit]
Description=Kubernetes Controller Manager
Documentation=https://github.com/kubernetes/kubernetes
After=kube-apiserver.service
Requires=kube-apiserver.service

[Service]
EnvironmentFile=/etc/kubernetes/kube-controller-manager
ExecStart=/usr/bin/kube-controller-manager $KUBE_CONTROLLER_MANAGER_OPTS
Restart=on-failure
LimitNOFILE=65536

[Install]
WantedBy=multi-user.target

# vi /etc/kubernetes/kube-controller-manager

KUBE_CONTROLLER_MANAGER_OPTS="--v=2 \
--log-dir=/var/log/kubernetes \
--logtostderr=false \
--service_account_private_key_file=/var/run/kubernetes/apiserver.key \
--master=http://127.0.0.1:8080"

# systemctl daemon-reload
# systemctl enable kube-controller-manager
# systemctl restart kube-controller-manager

配置 kube-scheduler

# vi /usr/lib/systemd/system/kube-scheduler.service 

[Unit]
Description=Kubernetes Scheduler
Documentation=https://github.com/kubernetes/kubernetes
After=kube-apiserver.service
Requires=kube-apiserver.service

[Service]
EnvironmentFile=/etc/kubernetes/scheduler
ExecStart=/usr/bin/kube-scheduler $KUBE_SCHEDULER_OPTS
Restart=on-failure
LimitNOFILE=65536

[Install]
WantedBy=multi-user.target

# vi /etc/kubernetes/scheduler

KUBE_SCHEDULER_OPTS="--v=2 \
--log-dir=/var/log/kubernetes \
--logtostderr=false \
--master=http://127.0.0.1:8080"

# systemctl daemon-reload
# systemctl enable kube-scheduler 
# systemctl restart kube-scheduler

验证

# systemctl status kube-apiserver
# systemctl status kube-scheduler 
# systemctl status kube-controller-manager
# curl http://192.168.112.110:8080

安装 NODE 节点

# mkdir -p /var/lib/kubelet
# cp kubernetes/server/bin/{kubelet,kube-proxy} /usr/bin/

配置 kubelet

# vi /usr/lib/systemd/system/kubelet.service 

[Unit]
Description=Kubernetes Kubelet
After=docker.service
Requires=docker.service

[Service]
WorkingDirectory=/var/lib/kubelet
EnvironmentFile=/etc/kubernetes/kubelet
ExecStart=/usr/bin/kubelet $KUBELET_ARGS
Restart=on-failure

[Install]
WantedBy=multi-user.target

# vi /etc/kubernetes/kubelet

KUBELET_ARGS="--v=2 \
--api-servers=http://192.168.112.110:8080 \
--hostname-override=192.168.112.110 \
--logtostderr=false \
--log-dir=/var/log/kubernetes"

# systemctl daemon-reload
# systemctl enable kubelet
# systemctl restart kubelet

配置 kube-proxy

# vi /usr/lib/systemd/system/kube-proxy.service 

[Unit]
Description=Kubernetes Proxy
After=network.target
Requires=network.target

[Service]
EnvironmentFile=/etc/kubernetes/proxy
ExecStart=/usr/bin/kube-proxy $KUBE_PROXY_ARGS
Restart=on-failure
LimitNOFILE=65536

[Install]
WantedBy=multi-user.target

# vi /etc/kubernetes/proxy

KUBE_PROXY_ARGS="--v=2 \
--log-dir=/var/log/kubernetes \
--logtostderr=false \
--master=http://192.168.112.110:8080"

# systemctl daemon-reload
# systemctl enable kube-proxy
# systemctl restart kube-proxy

验证

# systemctl status kubelet
# systemctl status kube-proxy
# kubectl get nodes
  • Kubernetes

    Kubernetes 是 Google 开源的一个容器编排引擎，它支持自动化部署、大规模可伸缩、应用容器化管理。

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