Centos7离线部署kubernetes 1.13集群记录

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