一、说明

本篇主要参考kubernetes中文社区的一篇部署文章（CentOS 使用二进制部署 Kubernetes 1.13集群），并做了更详细的记录以备用。

二、部署环境

1、kubernetes 版本：1.13，二进制文件

在参考文章中有下载。

2、本地部署环境

ip hostname version 部署
10.0.3.107 manager107 3.10.0-957.1.3.el7.x86_64 api-server，scheduler，controller-manager，etcd，kubelet，kube-proxy，flannel
10.0.3.68 worker68 3.10.0-957.1.3.el7.x86_64 kubelet，kube-proxy，flannel
10.0.3.80 worker80 3.10.0-957.1.3.el7.x86_64 kubelet，kube-proxy，flannel

3、部署网络说明

参考CentOS 使用二进制部署 Kubernetes 1.13集群。

三、kubernetes 安装及配置

1、创建临时目录

#存放etcd证书及配置文件

[root@manager107 ~]# mkdir -p /home/workspace/etcd

#存放k8s证书及配置文件

[root@manager107 ~]# mkdir -p /home/workspace/k8s

#存放k8s安装文件

[root@manager107 ~]# mkdir -p /home/workspace/packages

2、设置关闭防火墙、Swap及SELINUX

3台服务器上执行：

systemctl stop firewalld && systemctl disable firewalld

setenforce 0
swapoff -a && sysctl -w vm.swappiness=0

vi /etc/selinux/config

SELINUX=disabled

3、安装docker

略

4、创建安装目录

[root@manager107 ~]# mkdir /k8s/etcd/{bin,cfg,ssl} -p

[root@manager107 ~]# mkdir /k8s/kubernetes/{bin,cfg,ssl} -p

5、安装及配置CFSSL

[root@manager107 ~]# wget https://pkg.cfssl.org/R1.2/cfssl_linux-amd64

[root@manager107 ~]# wget https://pkg.cfssl.org/R1.2/cfssljson_linux-amd64

[root@manager107 ~]# wget https://pkg.cfssl.org/R1.2/cfssl-certinfo_linux-amd64

[root@manager107 ~]# chmod +x cfssl_linux-amd64 cfssljson_linux-amd64 cfssl-certinfo_linux-amd64

[root@manager107 ~]# mv cfssl_linux-amd64 /usr/local/bin/cfssl

[root@manager107 ~]# mv cfssljson_linux-amd64 /usr/local/bin/cfssljson

[root@manager107 ~]# mv cfssl-certinfo_linux-amd64 /usr/bin/cfssl-certinfo

6、创建认证证书

[root@manager107 ~]# cd /home/workspace/etcd

#创建 ETCD 证书

[root@manager107 etcd]# cat << EOF | tee ca-config.json

{

  "signing": {

    "default": {

      "expiry": "87600h"

    },

    "profiles": {

      "www": {

         "expiry": "87600h",

         "usages": [

            "signing",

            "key encipherment",

            "server auth",

            "client auth"

        ]

      }

    }

  }

}

EOF

#创建 ETCD CA 配置文件

[root@manager107 etcd]# cat << EOF | tee ca-csr.json

{

    "CN": "etcd CA",

    "key": {

        "algo": "rsa",

        "size":

    },

    "names": [

        {

            "C": "CN",

            "L": "Shenzhen",

            "ST": "Shenzhen"

        }

    ]

}

EOF

#创建 ETCD Server 证书

[root@manager107 etcd]# cat << EOF | tee server-csr.json

{

    "CN": "etcd",

    "hosts": [

    "10.0.3.107",

    "10.0.3.68",

    "10.0.3.80"

    ],

    "key": {

        "algo": "rsa",

        "size":

    },

    "names": [

        {

            "C": "CN",

            "L": "Shenzhen",

            "ST": "Shenzhen"

        }

    ]

}

EOF

#生成 ETCD CA 证书和私钥

[root@manager107 etcd]# cfssl gencert -initca ca-csr.json | cfssljson -bare ca -

[root@manager107 etcd]# cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=www server-csr.json | cfssljson -bare server
[root@manager107 etcd]# cd /home/workspace/k8s/

#创建 Kubernetes CA 证书

[root@manager107 k8s]# cat << EOF | tee ca-config.json

{

  "signing": {

    "default": {

      "expiry": "87600h"

    },

    "profiles": {

      "kubernetes": {

         "expiry": "87600h",

         "usages": [

            "signing",

            "key encipherment",

            "server auth",

            "client auth"

        ]

      }

    }

  }

}

EOF

[root@manager107 k8s]# cat << EOF | tee ca-csr.json

{

    "CN": "kubernetes",

    "key": {

        "algo": "rsa",

        "size":

    },

    "names": [

        {

            "C": "CN",

            "L": "Shenzhen",

            "ST": "Shenzhen",

            "O": "k8s",

            "OU": "System"

        }

    ]

}

EOF

[root@manager107 k8s]# cfssl gencert -initca ca-csr.json | cfssljson -bare ca -

#生成API_SERVER证书

[root@manager107 k8s]# cat << EOF | tee server-csr.json

{

    "CN": "kubernetes",

    "hosts": [

      "10.0.0.1",

      "127.0.0.1",

      "10.0.3.107",

      "kubernetes",

      "kubernetes.default",

      "kubernetes.default.svc",

      "kubernetes.default.svc.cluster",

      "kubernetes.default.svc.cluster.local"

    ],

    "key": {

        "algo": "rsa",

        "size":

    },

    "names": [

        {

            "C": "CN",

            "L": "Shenzhen",

            "ST": "Shenzhen",

            "O": "k8s",

            "OU": "System"

        }

    ]

}

EOF

[root@manager107 k8s]# cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=kubernetes server-csr.json | cfssljson -bare server

#创建 Kubernetes Proxy 证书

[root@manager107 k8s]# cat << EOF | tee kube-proxy-csr.json

{

  "CN": "system:kube-proxy",

  "hosts": [],

  "key": {

    "algo": "rsa",

    "size":

  },

  "names": [

    {

      "C": "CN",

      "L": "Shenzhen",

      "ST": "Shenzhen",

      "O": "k8s",

      "OU": "System"

    }

  ]

}

EOF

[root@manager107 k8s]# cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=kubernetes kube-proxy-csr.json | cfssljson -bare kube-proxy

7、ssh-key认证

[root@manager107 ~]# ssh-keygen

[root@manager107 ~]# ssh-copy-id 10.0.3.68

[root@manager107 ~]# ssh-copy-id 10.0.3.80

8、部署etcd

[root@manager107 workspace]# cd /home/workspace/packages/k8s1.-centos

[root@manager107 k8s1.-centos]# tar -xvf etcd-v3.3.10-linux-amd64.tar.gz

[root@manager107 k8s1.-centos]# cd etcd-v3.3.10-linux-amd64/

[root@manager107 etcd-v3.3.10-linux-amd64]# cp etcd etcdctl /k8s/etcd/bin/

[root@manager107 etcd-v3.3.10-linux-amd64]# vim /k8s/etcd/cfg/etcd

#[Member]

ETCD_NAME="etcd01"

ETCD_DATA_DIR="/var/lib/etcd/default.etcd"

ETCD_LISTEN_PEER_URLS="https://10.0.3.107:2380"

ETCD_LISTEN_CLIENT_URLS="https://10.0.3.107:2379"

#[Clustering]

ETCD_INITIAL_ADVERTISE_PEER_URLS="https://10.0.3.107:2380"

ETCD_ADVERTISE_CLIENT_URLS="https://10.0.3.107:2379"

ETCD_INITIAL_CLUSTER="etcd01=https://10.0.3.107:2380,etcd02=https://10.0.3.68:2380,etcd03=https://10.0.3.80:2380"

ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"

ETCD_INITIAL_CLUSTER_STATE="new"

#创建 etcd的 systemd unit 文件

[root@manager107 etcd-v3.3.10-linux-amd64]# vim /usr/lib/systemd/system/etcd.service

[Unit]

Description=Etcd Server

After=network.target

After=network-online.target

Wants=network-online.target

[Service]

Type=notify

EnvironmentFile=/k8s/etcd/cfg/etcd

ExecStart=/k8s/etcd/bin/etcd \

--name=${ETCD_NAME} \

--data-dir=${ETCD_DATA_DIR} \

--listen-peer-urls=${ETCD_LISTEN_PEER_URLS} \

--listen-client-urls=${ETCD_LISTEN_CLIENT_URLS},http://127.0.0.1:2379 \

--advertise-client-urls=${ETCD_ADVERTISE_CLIENT_URLS} \

--initial-advertise-peer-urls=${ETCD_INITIAL_ADVERTISE_PEER_URLS} \

--initial-cluster=${ETCD_INITIAL_CLUSTER} \

--initial-cluster-token=${ETCD_INITIAL_CLUSTER_TOKEN} \

--initial-cluster-state=new \

--cert-file=/k8s/etcd/ssl/server.pem \

--key-file=/k8s/etcd/ssl/server-key.pem \

--peer-cert-file=/k8s/etcd/ssl/server.pem \

--peer-key-file=/k8s/etcd/ssl/server-key.pem \

--trusted-ca-file=/k8s/etcd/ssl/ca.pem \

--peer-trusted-ca-file=/k8s/etcd/ssl/ca.pem

Restart=on-failure

LimitNOFILE=

[Install]

WantedBy=multi-user.target

#拷贝证书文件

[root@manager107 etcd-v3.3.10-linux-amd64]# cd /home/workspace/etcd/

[root@manager107 etcd]# cp ca*pem server*pem /k8s/etcd/ssl

#将启动文件、配置文件拷贝到 节点68、节点80

[root@manager107 etcd]# cd /k8s/

[root@manager107 k8s]# scp -r etcd 10.0.3.68:/k8s/etcd/

[root@manager107 k8s]# scp -r etcd 10.0.3.80:/k8s/etcd/

[root@manager107 k8s]# scp /usr/lib/systemd/system/etcd.service  10.0.3.68:/usr/lib/systemd/system/etcd.service

[root@manager107 k8s]# scp /usr/lib/systemd/system/etcd.service  10.0.3.80:/usr/lib/systemd/system/etcd.service

#在68上修改etcd配置文件

[root@worker68 ~]# vim /k8s/etcd/cfg/etcd

#[Member]

ETCD_NAME="etcd02"

ETCD_DATA_DIR="/var/lib/etcd/default.etcd"

ETCD_LISTEN_PEER_URLS="https://10.0.3.68:2380"

ETCD_LISTEN_CLIENT_URLS="https://10.0.3.68:2379"

#[Clustering]

ETCD_INITIAL_ADVERTISE_PEER_URLS="https://10.0.3.68:2380"

ETCD_ADVERTISE_CLIENT_URLS="https://10.0.3.68:2379"

ETCD_INITIAL_CLUSTER="etcd01=https://10.0.3.107:2380,etcd02=https://10.0.3.68:2380,etcd03=https://10.0.3.80:2380"

ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"

ETCD_INITIAL_CLUSTER_STATE="new"

#在80上修改etcd配置文件

[root@worker80 ~]# vim /k8s/etcd/cfg/etcd

#[Member]

ETCD_NAME="etcd03"

ETCD_DATA_DIR="/var/lib/etcd/default.etcd"

ETCD_LISTEN_PEER_URLS="https://10.0.3.80:2380"

ETCD_LISTEN_CLIENT_URLS="https://10.0.3.80:2379"

#[Clustering]

ETCD_INITIAL_ADVERTISE_PEER_URLS="https://10.0.3.80:2380"

ETCD_ADVERTISE_CLIENT_URLS="https://10.0.3.80:2379"

ETCD_INITIAL_CLUSTER="etcd01=https://10.0.3.107:2380,etcd02=https://10.0.3.68:2380,etcd03=https://10.0.3.80:2380"

ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"

ETCD_INITIAL_CLUSTER_STATE="new"

#80启动etcd

[root@worker80 ~]# systemctl daemon-reload

[root@worker80 ~]# systemctl enable etcd

[root@worker80 ~]# systemctl start etcd

#68启动etcd

[root@worker68 ~]# systemctl daemon-reload

[root@worker68 ~]# systemctl enable etcd

[root@worker68 ~]# systemctl start etcd

#107启动etcd

[root@manager107 ~]# systemctl daemon-reload

[root@manager107 ~]# systemctl enable etcd

[root@manager107 ~]# systemctl start etcd

#验证集群是否正常运行

[root@manager107 ~]# /k8s/etcd/bin/etcdctl --ca-file=/k8s/etcd/ssl/ca.pem \
--cert-file=/k8s/etcd/ssl/server.pem \
--key-file=/k8s/etcd/ssl/server-key.pem \
--endpoints="https://10.0.3.107:2379,https://10.0.3.68:2379,https://10.0.3.80:2379" \
cluster-health

9、部署Flannel网络

#向 etcd 写入集群 Pod 网段信息

[root@manager107 ssl]# cd /k8s/etcd/ssl/

[root@manager107 ssl]# /k8s/etcd/bin/etcdctl --ca-file=ca.pem --cert-file=server.pem \

--key-file=server-key.pem \

--endpoints="https://10.0.3.107:2379,https://10.0.3.68:2379,https://10.0.3.80:2379" \

set /coreos.com/network/config '{ "Network": "172.20.0.0/16", "Backend": {"Type": "vxlan"}}'

#解压安装

[root@manager107 ssl]# cd /home/workspace/packages/k8s1.-centos

[root@manager107 k8s1.-centos]# tar -xvf flannel-v0.10.0-linux-amd64.tar.gz

[root@manager107 k8s1.-centos]# mv flanneld mk-docker-opts.sh /k8s/kubernetes/bin/

#配置Flannel

[root@manager107 k8s1.-centos]# vim /k8s/kubernetes/cfg/flanneld

FLANNEL_OPTIONS="--etcd-endpoints=https://10.0.3.107:2379,https://10.0.3.68:2379,https://10.0.3.80:2379 -etcd-cafile=/k8s/etcd/ssl/ca.pem -etcd-certfile=/k8s/etcd/ssl/server.pem -etcd-keyfile=/k8s/etcd/ssl/server-key.pem"

#创建 flanneld 的 systemd unit 文件

[root@manager107 k8s1.-centos]# vim /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=/k8s/kubernetes/cfg/flanneld

ExecStart=/k8s/kubernetes/bin/flanneld --ip-masq $FLANNEL_OPTIONS

ExecStartPost=/k8s/kubernetes/bin/mk-docker-opts.sh -k DOCKER_NETWORK_OPTIONS -d /run/flannel/subnet.env

Restart=on-failure

[Install]

WantedBy=multi-user.target

#配置Docker启动指定子网段

[root@manager107 ~]# vim /usr/lib/systemd/system/docker.service

[Unit]

Description=Docker Application Container Engine

Documentation=https://docs.docker.com

BindsTo=containerd.service

After=network-online.target firewalld.service

Wants=network-online.target

[Service]

Type=notify

# the default is not to use systemd for cgroups because the delegate issues still

# exists and systemd currently does not support the cgroup feature set required

# for containers run by docker

EnvironmentFile=/run/flannel/subnet.env

# ExecStart=/usr/bin/dockerd  -H tcp://0.0.0.0:2376 -H unix://

ExecStart=/usr/bin/dockerd $DOCKER_NETWORK_OPTIONS

ExecReload=/bin/kill -s HUP $MAINPID

TimeoutSec=

RestartSec=

Restart=always

# Note that StartLimit* options were moved from "Service" to "Unit" in systemd .

# Both the old, and new location are accepted by systemd  and up, so using the old location

# to make them work for either version of systemd.

StartLimitBurst=

# Note that StartLimitInterval was renamed to StartLimitIntervalSec in systemd .

# Both the old, and new name are accepted by systemd  and up, so using the old name to make

# this option work for either version of systemd.

StartLimitInterval=60s

# 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=infinity

LimitNPROC=infinity

LimitCORE=infinity

# Comment TasksMax if your systemd version does not supports it.

# Only systemd  and above support this option.

TasksMax=infinity

# set delegate yes so that systemd does not reset the cgroups of docker containers

Delegate=yes

# kill only the docker process, not all processes in the cgroup

KillMode=process

[Install]

WantedBy=multi-user.target

[root@worker68 ~]# vim /usr/lib/systemd/system/docker.service

[Unit]

Description=Docker Application Container Engine

Documentation=https://docs.docker.com

BindsTo=containerd.service

After=network-online.target firewalld.service

Wants=network-online.target

[Service]

Type=notify

# the default is not to use systemd for cgroups because the delegate issues still

# exists and systemd currently does not support the cgroup feature set required

# for containers run by docker

EnvironmentFile=/run/flannel/subnet.env

# ExecStart=/usr/bin/dockerd  -H tcp://0.0.0.0:2376 -H unix://

ExecStart=/usr/bin/dockerd $DOCKER_NETWORK_OPTIONS

ExecReload=/bin/kill -s HUP $MAINPID

TimeoutSec=

RestartSec=

Restart=always

# Note that StartLimit* options were moved from "Service" to "Unit" in systemd .

# Both the old, and new location are accepted by systemd  and up, so using the old location

# to make them work for either version of systemd.

StartLimitBurst=

# Note that StartLimitInterval was renamed to StartLimitIntervalSec in systemd .

# Both the old, and new name are accepted by systemd  and up, so using the old name to make

# this option work for either version of systemd.

StartLimitInterval=60s

# 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=infinity

LimitNPROC=infinity

LimitCORE=infinity

# Comment TasksMax if your systemd version does not supports it.

# Only systemd  and above support this option.

TasksMax=infinity

# set delegate yes so that systemd does not reset the cgroups of docker containers

Delegate=yes

# kill only the docker process, not all processes in the cgroup

KillMode=process

[Install]

WantedBy=multi-user.target

[root@worker80 ~]# vim /usr/lib/systemd/system/docker.service

[Unit]

Description=Docker Application Container Engine

Documentation=https://docs.docker.com

BindsTo=containerd.service

After=network-online.target firewalld.service

Wants=network-online.target

[Service]

Type=notify

# the default is not to use systemd for cgroups because the delegate issues still

# exists and systemd currently does not support the cgroup feature set required

# for containers run by docker

EnvironmentFile=/run/flannel/subnet.env

# ExecStart=/usr/bin/dockerd  -H tcp://0.0.0.0:2376 -H unix://

ExecStart=/usr/bin/dockerd $DOCKER_NETWORK_OPTIONS

ExecReload=/bin/kill -s HUP $MAINPID

TimeoutSec=

RestartSec=

Restart=always

# Note that StartLimit* options were moved from "Service" to "Unit" in systemd .

# Both the old, and new location are accepted by systemd  and up, so using the old location

# to make them work for either version of systemd.

StartLimitBurst=

# Note that StartLimitInterval was renamed to StartLimitIntervalSec in systemd .

# Both the old, and new name are accepted by systemd  and up, so using the old name to make

# this option work for either version of systemd.

StartLimitInterval=60s

# 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=infinity

LimitNPROC=infinity

LimitCORE=infinity

# Comment TasksMax if your systemd version does not supports it.

# Only systemd  and above support this option.

TasksMax=infinity

# set delegate yes so that systemd does not reset the cgroups of docker containers

Delegate=yes

# kill only the docker process, not all processes in the cgroup

KillMode=process

[Install]

WantedBy=multi-user.target

#将flanneld systemd unit 文件到所有节点

[root@manager107 ~]# cd /k8s

[root@manager107 k8s]# scp -r kubernetes 10.0.3.68:/k8s/kubernetes

[root@manager107 k8s]# scp -r kubernetes 10.0.3.80:/k8s/kubernetes

[root@manager107 k8s]# scp /k8s/kubernetes/cfg/flanneld 10.0.3.68:/k8s/kubernetes/cfg/flanneld

[root@manager107 k8s]# scp /k8s/kubernetes/cfg/flanneld 10.0.3.80:/k8s/kubernetes/cfg/flanneld

[root@manager107 k8s]# scp /usr/lib/systemd/system/docker.service  10.0.3.68:/usr/lib/systemd/system/docker.service

[root@manager107 k8s]# scp /usr/lib/systemd/system/docker.service  10.0.3.80:/usr/lib/systemd/system/docker.service

[root@manager107 k8s]# scp /usr/lib/systemd/system/flanneld.service  10.0.3.68:/usr/lib/systemd/system/flanneld.service

[root@manager107 k8s]# scp /usr/lib/systemd/system/flanneld.service  10.0.3.80:/usr/lib/systemd/system/flanneld.service

#107上启动flannel

[root@manager107 ~]# systemctl daemon-reload

[root@manager107 ~]# systemctl enable flanneld

[root@manager107 ~]# systemctl start flanneld

[root@manager107 ~]# systemctl restart docker

#68上启动flannel

[root@worker68 ~]# systemctl daemon-reload

[root@worker68 ~]# systemctl enable flanneld

[root@worker68 ~]# systemctl start flanneld

[root@worker68 ~]# systemctl restart docker

#80上启动flannel

[root@worker80 ~]# systemctl daemon-reload

[root@worker80 ~]# systemctl enable flanneld

[root@worker80 ~]# systemctl start flanneld

[root@worker80 ~]# systemctl restart docker

#查看是否生效

[root@manager107 ~]# ip add

10、部署master节点

kubernetes master 节点运行如下组件：

  • kube-apiserver
  • kube-scheduler
  • kube-controller-manager

kube-scheduler 和 kube-controller-manager 可以以集群模式运行，通过 leader 选举产生一个工作进程，其它进程处于阻塞模式。

#将二进制文件解压拷贝到master 节点

[root@manager107 ~]# cd /home/workspace/packages/k8s1.-centos

[root@manager107 k8s1.-centos]# tar -xvf kubernetes-server-linux-amd64.tar.gz

[root@manager107 k8s1.-centos]# cd kubernetes/server/bin/

[root@manager107 bin]# cp kube-scheduler kube-apiserver kube-controller-manager kubectl /k8s/kubernetes/bin/

#拷贝认证

[root@manager107 bin]# cd /home/workspace/k8s/

[root@manager107 k8s]# cp *pem /k8s/kubernetes/ssl/

#部署 kube-apiserver 组件

##创建 TLS Bootstrapping Token

[root@manager107 k8s]# head -c  /dev/urandom | od -An -t x | tr -d ' '

e9ca0f3e1b66c9bef910b47171490c53

[root@manager107 k8s]# vim /k8s/kubernetes/cfg/token.csv

e9ca0f3e1b66c9bef910b47171490c53,kubelet-bootstrap,,"system:kubelet-bootstrap"

##创建apiserver配置文件

[root@manager107 k8s]# vim /k8s/kubernetes/cfg/kube-apiserver

KUBE_APISERVER_OPTS="--logtostderr=true \

--v= \

--etcd-servers=https://10.0.3.107:2379,https://10.0.3.68:2379,https://10.0.3.80:2379 \

--bind-address=10.0.3.107 \

--secure-port= \

--advertise-address=10.0.3.107 \

--allow-privileged=true \

--service-cluster-ip-range=10.0.0.0/ \

--enable-admission-plugins=NamespaceLifecycle,LimitRanger,SecurityContextDeny,ServiceAccount,ResourceQuota,NodeRestriction \

--authorization-mode=RBAC,Node \

--enable-bootstrap-token-auth \

--token-auth-file=/k8s/kubernetes/cfg/token.csv \

--service-node-port-range=- \

--tls-cert-file=/k8s/kubernetes/ssl/server.pem  \

--tls-private-key-file=/k8s/kubernetes/ssl/server-key.pem \

--client-ca-file=/k8s/kubernetes/ssl/ca.pem \

--service-account-key-file=/k8s/kubernetes/ssl/ca-key.pem \

--etcd-cafile=/k8s/etcd/ssl/ca.pem \

--etcd-certfile=/k8s/etcd/ssl/server.pem \

--etcd-keyfile=/k8s/etcd/ssl/server-key.pem"

##创建 kube-apiserver systemd unit 文件

[root@manager107 k8s]# vim /usr/lib/systemd/system/kube-apiserver.service

[Unit]

Description=Kubernetes API Server

Documentation=https://github.com/kubernetes/kubernetes

[Service]

EnvironmentFile=-/k8s/kubernetes/cfg/kube-apiserver

ExecStart=/k8s/kubernetes/bin/kube-apiserver $KUBE_APISERVER_OPTS

Restart=on-failure

[Install]

WantedBy=multi-user.target

#启动服务

[root@manager107 k8s]# systemctl daemon-reload

[root@manager107 k8s]# systemctl enable kube-apiserver

[root@manager107 k8s]# systemctl restart kube-apiserver

#查看apiserver是否运行

[root@manager107 k8s]# systemctl status kube-apiserver

#部署kube-scheduler

##创建kube-scheduler配置文件

[root@manager107 k8s]# vim  /k8s/kubernetes/cfg/kube-scheduler

KUBE_SCHEDULER_OPTS="--logtostderr=true --v=4 --master=127.0.0.1:8080 --leader-elect"

##创建kube-scheduler systemd unit 文件

[root@manager107 k8s]# vim /usr/lib/systemd/system/kube-scheduler.service

[Unit]

Description=Kubernetes Scheduler

Documentation=https://github.com/kubernetes/kubernetes

[Service]

EnvironmentFile=-/k8s/kubernetes/cfg/kube-scheduler

ExecStart=/k8s/kubernetes/bin/kube-scheduler $KUBE_SCHEDULER_OPTS

Restart=on-failure

[Install]

WantedBy=multi-user.target

##启动服务

[root@manager107 k8s]# systemctl daemon-reload

[root@manager107 k8s]# systemctl enable kube-scheduler.service

[root@manager107 k8s]# systemctl start kube-scheduler.service

##查看kube-scheduler是否运行

[root@manager107 k8s]# systemctl status kube-scheduler.service

#部署kube-controller-manager

##创建kube-controller-manager配置文件

[root@manager107 k8s]# vim /k8s/kubernetes/cfg/kube-controller-manager

KUBE_CONTROLLER_MANAGER_OPTS="--logtostderr=true \

--v= \

--master=127.0.0.1: \

--leader-elect=true \

--address=127.0.0.1 \

--service-cluster-ip-range=10.0.0.0/ \

--cluster-name=kubernetes \

--cluster-signing-cert-file=/k8s/kubernetes/ssl/ca.pem \

--cluster-signing-key-file=/k8s/kubernetes/ssl/ca-key.pem  \

--root-ca-file=/k8s/kubernetes/ssl/ca.pem \

--service-account-private-key-file=/k8s/kubernetes/ssl/ca-key.pem"

##创建kube-controller-manager systemd unit 文件

[root@manager107 k8s]# vim /usr/lib/systemd/system/kube-controller-manager.service

[Unit]

Description=Kubernetes Controller Manager

Documentation=https://github.com/kubernetes/kubernetes

[Service]

EnvironmentFile=/k8s/kubernetes/cfg/kube-controller-manager

ExecStart=/k8s/kubernetes/bin/kube-controller-manager $KUBE_CONTROLLER_MANAGER_OPTS

Restart=on-failure

[Install]

WantedBy=multi-user.target

##启动服务

[root@manager107 k8s]# systemctl daemon-reload

[root@manager107 k8s]# systemctl enable kube-controller-manager

[root@manager107 k8s]# systemctl start kube-controller-manager

##查看kube-controller-manager是否运行

[root@manager107 k8s]# systemctl status kube-controller-manager

#将可执行文件路/k8s/kubernetes/ 添加到 PATH 变量中

[root@manager107 k8s]# vim /etc/profile

PATH=/k8s/kubernetes/bin:$PATH:$HOME/bin

[root@manager107 k8s]# source /etc/profile

#查看master集群状态

[root@manager107 k8s]# kubectl get cs,nodes

11、部署node 节点

kubernetes node 节点运行如下组件：

  • docker
  • kubelet
  • kube-proxy

kubelet 运行在每个 worker 节点上，接收 kube-apiserver 发送的请求，管理 Pod 容器，执行交互式命令，如exec、run、logs 等;

kubelet 启动时自动向 kube-apiserver 注册节点信息，内置的 cadvisor 统计和监控节点的资源使用情况;

为确保安全，本文档只开启接收 https 请求的安全端口，对请求进行认证和授权，拒绝未授权的访问(如apiserver、heapster)。

#将kubelet 二进制文件拷贝至node节点

[root@manager107 bin]# cd /home/workspace/packages/k8s1.-centos/kubernetes/server/bin

[root@manager107 bin]# scp kubelet kube-proxy 10.0.3.68:/k8s/kubernetes/bin/

[root@manager107 bin]# scp kubelet kube-proxy 10.0.3.80:/k8s/kubernetes/bin/

#新建目录

[root@manager107 bin]# mkdir /home/workspace/kubelet_bootstrap_config

[root@manager107 bin]# cd /home/workspace/kubelet_bootstrap_config

#创建 kubelet bootstrap kubeconfig 文件

[root@manager107 kubelet_bootstrap_config]# vim environment.sh

# 创建kubelet bootstrapping kubeconfig

BOOTSTRAP_TOKEN=e9ca0f3e1b66c9bef910b47171490c53

KUBE_APISERVER="https://10.0.3.107:6443"

# 设置集群参数

kubectl config set-cluster kubernetes \

  --certificate-authority=/home/workspace/k8s/ca.pem \

  --embed-certs=true \

  --server=${KUBE_APISERVER} \

  --kubeconfig=bootstrap.kubeconfig

# 设置客户端认证参数

kubectl config set-credentials kubelet-bootstrap \

  --token=${BOOTSTRAP_TOKEN} \

  --kubeconfig=bootstrap.kubeconfig

# 设置上下文参数

kubectl config set-context default \

  --cluster=kubernetes \

  --user=kubelet-bootstrap \

  --kubeconfig=bootstrap.kubeconfig

# 设置默认上下文

kubectl config use-context default --kubeconfig=bootstrap.kubeconfig

# 创建kube-proxy kubeconfig文件

kubectl config set-cluster kubernetes \

  --certificate-authority=/home/workspace/k8s/ca.pem \

  --embed-certs=true \

  --server=${KUBE_APISERVER} \

  --kubeconfig=kube-proxy.kubeconfig

kubectl config set-credentials kube-proxy \

  --client-certificate=/home/workspace/k8s/kube-proxy.pem \

  --client-key=/home/workspace/k8s/kube-proxy-key.pem \

  --embed-certs=true \

  --kubeconfig=kube-proxy.kubeconfig

kubectl config set-context default \

  --cluster=kubernetes \

  --user=kube-proxy \

  --kubeconfig=kube-proxy.kubeconfig

kubectl config use-context default --kubeconfig=kube-proxy.kubeconfig

[root@manager107 kubelet_bootstrap_config]# sh environment.sh

#将bootstrap kubeconfig kube-proxy.kubeconfig 文件拷贝到所有 nodes节点

[root@manager107 kubelet_bootstrap_config]# cp bootstrap.kubeconfig kube-proxy.kubeconfig /k8s/kubernetes/cfg/

[root@manager107 kubelet_bootstrap_config]# scp bootstrap.kubeconfig kube-proxy.kubeconfig 10.0.3.68:/k8s/kubernetes/cfg/

[root@manager107 kubelet_bootstrap_config]# scp bootstrap.kubeconfig kube-proxy.kubeconfig 10.0.3.80:/k8s/kubernetes/cfg/

#107上创建 kubelet 参数配置文件

[root@manager107 ~]# vim /k8s/kubernetes/cfg/kubelet.config

kind: KubeletConfiguration

apiVersion: kubelet.config.k8s.io/v1beta1

address: 10.0.3.107

port:

readOnlyPort:

cgroupDriver: cgroupfs

clusterDNS: ["10.0.0.2"]

clusterDomain: cluster.local.

failSwapOn: false

authentication:

  anonymous:

    enabled: true

#107上创建kubelet配置文件

[root@manager107 ~]# vim /k8s/kubernetes/cfg/kubelet

KUBELET_OPTS="--logtostderr=true \

--v= \

--hostname-override=10.0.3.107 \

--kubeconfig=/k8s/kubernetes/cfg/kubelet.kubeconfig \

--bootstrap-kubeconfig=/k8s/kubernetes/cfg/bootstrap.kubeconfig \

--config=/k8s/kubernetes/cfg/kubelet.config \

--cert-dir=/k8s/kubernetes/ssl \

--pod-infra-container-image=registry.cn-hangzhou.aliyuncs.com/google-containers/pause-amd64:3.0"

#107上创建kubelet systemd unit 文件

[root@manager107 ~]# vim /usr/lib/systemd/system/kubelet.service

[Unit]

Description=Kubernetes Kubelet

After=docker.service

Requires=docker.service

[Service]

EnvironmentFile=/k8s/kubernetes/cfg/kubelet

ExecStart=/k8s/kubernetes/bin/kubelet $KUBELET_OPTS

Restart=on-failure

KillMode=process

[Install]

WantedBy=multi-user.target

#68上创建 kubelet 参数配置文件：

[root@worker68 ~]# vim /k8s/kubernetes/cfg/kubelet.config

kind: KubeletConfiguration

apiVersion: kubelet.config.k8s.io/v1beta1

address: 10.0.3.68

port:

readOnlyPort:

cgroupDriver: cgroupfs

clusterDNS: ["10.0.0.2"]

clusterDomain: cluster.local.

failSwapOn: false

authentication:

  anonymous:

    enabled: true

#68上创建kubelet配置文件

[root@worker68 ~]# vim /k8s/kubernetes/cfg/kubelet

KUBELET_OPTS="--logtostderr=true \

--v= \

--hostname-override=10.0.3.68 \

--kubeconfig=/k8s/kubernetes/cfg/kubelet.kubeconfig \

--bootstrap-kubeconfig=/k8s/kubernetes/cfg/bootstrap.kubeconfig \

--config=/k8s/kubernetes/cfg/kubelet.config \

--cert-dir=/k8s/kubernetes/ssl \

--pod-infra-container-image=registry.cn-hangzhou.aliyuncs.com/google-containers/pause-amd64:3.0"

#68上创建kubelet systemd unit 文件

[root@worker68 ~]# vim /usr/lib/systemd/system/kubelet.service

[Unit]

Description=Kubernetes Kubelet

After=docker.service

Requires=docker.service

[Service]

EnvironmentFile=/k8s/kubernetes/cfg/kubelet

ExecStart=/k8s/kubernetes/bin/kubelet $KUBELET_OPTS

Restart=on-failure

KillMode=process

[Install]

WantedBy=multi-user.target

#80上创建 kubelet 参数配置文件

[root@worker80 ~]# vim /k8s/kubernetes/cfg/kubelet.config

kind: KubeletConfiguration

apiVersion: kubelet.config.k8s.io/v1beta1

address: 10.0.3.80

port:

readOnlyPort:

cgroupDriver: cgroupfs

clusterDNS: ["10.0.0.2"]

clusterDomain: cluster.local.

failSwapOn: false

authentication:

  anonymous:

    enabled: true

#80上创建kubelet配置文件

[root@worker80 ~]# vim /k8s/kubernetes/cfg/kubelet

KUBELET_OPTS="--logtostderr=true \

--v= \

--hostname-override=10.0.3.80 \

--kubeconfig=/k8s/kubernetes/cfg/kubelet.kubeconfig \

--bootstrap-kubeconfig=/k8s/kubernetes/cfg/bootstrap.kubeconfig \

--config=/k8s/kubernetes/cfg/kubelet.config \

--cert-dir=/k8s/kubernetes/ssl \

--pod-infra-container-image=registry.cn-hangzhou.aliyuncs.com/google-containers/pause-amd64:3.0"

#80上创建kubelet systemd unit 文件

[root@worker80 ~]# vim /usr/lib/systemd/system/kubelet.service

[Unit]

Description=Kubernetes Kubelet

After=docker.service

Requires=docker.service

[Service]

EnvironmentFile=/k8s/kubernetes/cfg/kubelet

ExecStart=/k8s/kubernetes/bin/kubelet $KUBELET_OPTS

Restart=on-failure

KillMode=process

[Install]

WantedBy=multi-user.target

#将kubelet-bootstrap用户绑定到系统集群角色

[root@manager107 ~]# kubectl create clusterrolebinding kubelet-bootstrap \

--clusterrole=system:node-bootstrapper \

--user=kubelet-bootstrap

#107上启动服务

[root@manager107 ~]# systemctl daemon-reload

[root@manager107 ~]# systemctl enable kubelet

[root@manager107 ~]# systemctl start kubelet

#68上启动服务

[root@worker68 ~]# systemctl daemon-reload

[root@worker68 ~]# systemctl enable kubelet

[root@worker68 ~]# systemctl start kubelet

#80上启动服务

[root@worker80 ~]# systemctl daemon-reload

[root@worker80 ~]# systemctl enable kubelet

[root@worker80 ~]# systemctl start kubelet

kubelet 首次启动时向 kube-apiserver 发送证书签名请求，必须通过后 kubernetes 系统才会将该 Node 加入到集群。

#查看未授权的CSR请求

[root@manager107 ~]# kubectl get csr

#通过CSR请求

[root@manager107 ~]# kubectl certificate approve 节点名
#查看集群状态

[root@manager107 ~]# kubectl get nodes

NAME              STATUS     ROLES     AGE      VERSION

node/10.0.3.107   Ready      master    20h      v1.13.0

node/10.0.3.68    Ready      node      20h      v1.13.0

node/10.0.3.80    Ready      node      20h      v1.13.0
#部署 kube-proxy 组件

#kube-proxy 运行在所有 node节点上，它监听 apiserver 中 service 和 Endpoint 的变化情况，创建路由规则来进行服务负载均衡。

#107上创建 kube-proxy 配置文件

[root@manager107 ~]# vim /k8s/kubernetes/cfg/kube-proxy

KUBE_PROXY_OPTS="--logtostderr=true \

--v= \

--hostname-override=10.0.3.107 \

--cluster-cidr=10.0.0.0/ \

--kubeconfig=/k8s/kubernetes/cfg/kube-proxy.kubeconfig"

#107上创建kube-proxy systemd unit 文件

[root@manager107 ~]# vim /usr/lib/systemd/system/kube-proxy.service

[Unit]

Description=Kubernetes Proxy

After=network.target

[Service]

EnvironmentFile=/k8s/kubernetes/cfg/kube-proxy

ExecStart=/k8s/kubernetes/bin/kube-proxy $KUBE_PROXY_OPTS

Restart=on-failure

[Install]

WantedBy=multi-user.target

#68上创建 kube-proxy 配置文件

[root@worker68 ~]# vim /k8s/kubernetes/cfg/kube-proxy

KUBE_PROXY_OPTS="--logtostderr=true \

--v= \

--hostname-override=10.0.3.68 \

--cluster-cidr=10.0.0.0/ \

--kubeconfig=/k8s/kubernetes/cfg/kube-proxy.kubeconfig"

#68上创建kube-proxy systemd unit 文件

[root@worker68 ~]# vim /usr/lib/systemd/system/kube-proxy.service

[Unit]

Description=Kubernetes Proxy

After=network.target

[Service]

EnvironmentFile=/k8s/kubernetes/cfg/kube-proxy

ExecStart=/k8s/kubernetes/bin/kube-proxy $KUBE_PROXY_OPTS

Restart=on-failure

[Install]

WantedBy=multi-user.target

#80上创建 kube-proxy 配置文件

[root@worker80 ~]# vim /k8s/kubernetes/cfg/kube-proxy

KUBE_PROXY_OPTS="--logtostderr=true \

--v= \

--hostname-override=10.0.3.80 \

--cluster-cidr=10.0.0.0/ \

--kubeconfig=/k8s/kubernetes/cfg/kube-proxy.kubeconfig"

#80上创建kube-proxy systemd unit 文件

[root@worker80 ~]# vim /usr/lib/systemd/system/kube-proxy.service

[Unit]

Description=Kubernetes Proxy

After=network.target

[Service]

EnvironmentFile=/k8s/kubernetes/cfg/kube-proxy

ExecStart=/k8s/kubernetes/bin/kube-proxy $KUBE_PROXY_OPTS

Restart=on-failure

[Install]

WantedBy=multi-user.target

#107上启动服务

[root@manager107 ~]# systemctl daemon-reload

[root@manager107 ~]# systemctl enable kube-proxy

[root@manager107 ~]# systemctl start kube-proxy

#68上启动服务

[root@worker68 ~]# systemctl daemon-reload

[root@worker68 ~]# systemctl enable kube-proxy

[root@worker68 ~]# systemctl start kube-proxy

#80上启动服务

[root@worker80 ~]# systemctl daemon-reload

[root@worker80 ~]# systemctl enable kube-proxy

[root@worker80 ~]# systemctl start kube-proxy
#给node和master节点打标签

[root@manager107 ~]# kubectl label node 10.0.3.107  node-role.kubernetes.io/master='master'

[root@manager107 ~]# kubectl label node 10.0.3.68  node-role.kubernetes.io/node='node'

[root@manager107 ~]# kubectl label node 10.0.3.80  node-role.kubernetes.io/node='node'
#查看集群状态

[root@manager107 ~]# kubectl get node,cs

NAME              STATUS   ROLES    AGE   VERSION

node/10.0.3.107   Ready    master   21h   v1.13.0

node/10.0.3.68    Ready    node     21h   v1.13.0

node/10.0.3.80    Ready    node     21h   v1.13.0

NAME                                 STATUS    MESSAGE             ERROR

componentstatus/scheduler            Healthy   ok

componentstatus/controller-manager   Healthy   ok

componentstatus/etcd-               Healthy   {"health":"true"}

componentstatus/etcd-               Healthy   {"health":"true"}

componentstatus/etcd-               Healthy   {"health":"true"}

四、参考

https://www.kubernetes.org.cn/4963.html

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