二进制方式部署k8s集群

目标任务:

1、Kubernetes集群部署架构规划

2、部署Etcd集群

3、在Node节点安装Docker

4、部署Flannel网络

5、在Master节点部署组件

6、在Node节点部署组件

7、查看集群状态

8、运行一个测试示例

9、部署Dashboard(Web UI)

 

1、Kubernetes集群部署架构规划

操作系统:

    CentOS7.6_x64软件版本:

    Docker 18.09.0-ce

    Kubernetes 1.11

环境:

k8s-master       10.206.240.188  

k8s-node1        10.206.240.111 

k8s-node2        10.206.240.112 

机器配置要求:

    2G  

    主机名称必须改必须解析

    selinux

拓扑图:


部署Etcd集群

使用cfssl来生成自签证书,任何机器都行,证书这块儿知道怎么生成、怎么用即可,暂且不用过多研究。


下载cfssl工具:

# wget https://pkg.cfssl.org/R1.2/cfssl_linux-amd64

# wget https://pkg.cfssl.org/R1.2/cfssljson_linux-amd64

# wget https://pkg.cfssl.org/R1.2/cfssl-certinfo_linux-amd64

# chmod +x cfssl_linux-amd64 cfssljson_linux-amd64 cfssl-certinfo_linux-amd64

# mv cfssl_linux-amd64 /usr/local/bin/cfssl

# mv cfssljson_linux-amd64 /usr/local/bin/cfssljson

# mv cfssl-certinfo_linux-amd64 /usr/bin/cfssl-certinfo


生成Etcd证书:

创建以下三个文件:

# cat ca-config.json

{

  "signing": {

    "default": {

      "expiry": "87600h"

    },

    "profiles": {

      "www": {

         "expiry": "87600h",

         "usages": [

            "signing",

            "key encipherment",

            "server auth",

            "client auth"

        ]

      }

    }

  }

}


# cat ca-csr.json

{

    "CN": "etcd CA",

    "key": {

        "algo": "rsa",

        "size": 2048

    },

    "names": [

        {

            "C": "CN",

            "L": "Beijing",

            "ST": "Beijing"

        }

    ]

}


# cat server-csr.json

{

    "CN": "etcd",

    "hosts": [

    "10.206.240.188",

    "10.206.240.189",

    "10.206.240.111"

    ],

    "key": {

        "algo": "rsa",

        "size": 2048

    },

    "names": [

        {

            "C": "CN",

            "L": "BeiJing",

            "ST": "BeiJing"

        }

    ]

}

生成证书:

# cfssl gencert -initca ca-csr.json | cfssljson -bare ca -

# cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=www server-csr.json | cfssljson -bare server

# ls *pem

ca-key.pem  ca.pem  server-key.pem  server.pem安装Etcd:

二进制包下载地址:

    https://github.com/coreos/etcd/releases/tag/v3.2.12


以下部署步骤在规划的三个etcd节点操作一样,唯一不同的是etcd配置文件中的服务器IP要写当前的:

解压二进制包:

# mkdir /opt/etcd/{bin,cfg,ssl} -p

# tar zxvf etcd-v3.2.12-linux-amd64.tar.gz

# mv etcd-v3.2.12-linux-amd64/{etcd,etcdctl} /opt/etcd/bin/


创建etcd配置文件:

# cat /opt/etcd/cfg/etcd   

#[Member]

ETCD_NAME="etcd01"

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

ETCD_LISTEN_PEER_URLS="https://10.206.240.189:2380"   (主机IP)

ETCD_LISTEN_CLIENT_URLS="https://10.206.240.189:2379"  (主机IP)

#[Clustering]

ETCD_INITIAL_ADVERTISE_PEER_URLS="https://10.206.240.189:2380"  (主机IP)

ETCD_ADVERTISE_CLIENT_URLS="https://10.206.240.189:2379"     (主机IP)

ETCD_INITIAL_CLUSTER="etcd01=https://10.206.240.189:2380,etcd02=https: //10.206.240.188:2380,etcd03=https://10.206.240.111:2380"      (集群IP)

ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"

ETCD_INITIAL_CLUSTER_STATE="new"

解释:

* ETCD_NAME节点名称

* ETCD_DATA_DIR数据目录

* ETCD_LISTEN_PEER_URLS集群通信监听地址

* ETCD_LISTEN_CLIENT_URLS客户端访问监听地址

* ETCD_INITIAL_ADVERTISE_PEER_URLS集群通告地址

* ETCD_ADVERTISE_CLIENT_URLS客户端通告地址

* ETCD_INITIAL_CLUSTER集群节点地址

* ETCD_INITIAL_CLUSTER_TOKEN集群Token

* ETCD_INITIAL_CLUSTER_STATE加入集群的当前状态,new是新集群,existing表示加入已有集群

systemd管理etcd:

# cat /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=/opt/etcd/cfg/etcd

ExecStart=/opt/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=/opt/etcd/ssl/server.pem \

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

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

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

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

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

Restart=on-failure

LimitNOFILE=65536

[Install]

WantedBy=multi-user.target

把刚才生成的证书拷贝到配置文件中的位置:

# cp ca*pem server*pem /opt/etcd/ssl

启动并设置开启启动:

# systemctl start etcd

# systemctl enable etcd

都部署完成后,检查etcd集群状态:

# /opt/etcd/bin/etcdctl \--ca-file=/opt/etcd/ssl/ca.pem --cert-file=/opt/etcd/ssl/server.pem --key-file=/opt/etcd/ssl/server-key.pem \--endpoints="https://10.206.240.189:2379,https://10.206.240.188:2379,https://10.206.240.111:2379" \cluster-health

member 18218cfabd4e0dea is healthy: got healthy result from https://10.206.240.111:2379

member 541c1c40994c939b is healthy: got healthy result from https://10.206.240.189:2379

member a342ea2798d20705 is healthy: got healthy result from https://10.206.240.188:2379

cluster is healthy

如果输出上面信息,就说明集群部署成功。

报错:

Jan 15 12:06:55 k8s-master1 etcd: request cluster ID mismatch (got 99f4702593c94f98 want cdf818194e3a8c32)

解决:因为集群搭建过程,单独启动过单一etcd,做为测试验证,集群内第一次启动其他etcd服务时候,是通过发现服务引导的,所以需要删除旧的成员信息,所有节点作以下操作

[root@k8s-master1 default.etcd]# pwd

/var/lib/etcd/default.etcd

[root@k8s-master1 default.etcd]# rm -rf member/

在Node节点安装Docker

部署Flannel网络

工作原理:

Falnnel要用etcd存储自身一个子网信息,所以要保证能成功连接Etcd,写入预定义子网段:

# /opt/etcd/bin/etcdctl \--ca-file=ca.pem --cert-file=server.pem --key-file=server-key.pem \--endpoints="https://10.206.240.189:2379,https://10.206.240.188:2379,https://10.206.240.111:2379" \set /coreos.com/network/config  '{ "Network": "172.17.0.0/16", "Backend": {"Type": "vxlan"}}'  (注意IP)

以下部署步骤在规划的每个node节点都操作。

下载二进制包:

# wget https://github.com/coreos/flannel/releases/download/v0.10.0/flannel-v0.10.0-linux-amd64.tar.gz

# tar zxvf flannel-v0.10.0-linux-amd64.tar.gz

# mkdir -pv /opt/kubernetes/bin

# mv flanneld mk-docker-opts.sh /opt/kubernetes/bin


配置Flannel:

# mkdir -pv /opt/kubernetes/cfg/

# cat /opt/kubernetes/cfg/flanneld

FLANNEL_OPTIONS="--etcd-endpoints=https://10.206.240.189:2379,https://10.206.240.188:2379,https://10.206.240.111:2379 -etcd-cafile=/opt/etcd/ssl/ca.pem -etcd-certfile=/opt/etcd/ssl/server.pem -etcd-keyfile=/opt/etcd/ssl/server-key.pem" (注意IP)

systemd管理Flannel:

# cat /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

配置Docker启动指定子网段:

# cat /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

从其他节点拷贝证书文件到node1和2上:因为node1和2上没有证书,但是flanel需要证书

# mkdir -pv /opt/etcd/ssl/

# scp /opt/etcd/ssl/*  k8s-node2:/opt/etcd/ssl/

#scp /opt/etcd/ssl/*  k8s-node1:/opt/etcd/ssl/

重启flannel和docker:

# systemctl daemon-reload

# systemctl start flanneld

# systemctl enable flanneld

# systemctl restart docker

检查是否生效:

# ps -ef | grep docker

root     20941     1  1 Jun28 ?        09:15:34 /usr/bin/dockerd --bip=172.17.34.1/24 --ip-masq=false --mtu=1450

# ip addr

3607: flannel.1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1450 qdisc noqueue state UNKNOWN

    link/ether 8a:2e:3d:09:dd:82 brd ff:ff:ff:ff:ff:ff

    inet 172.17.34.0/32 scope global flannel.1

       valid_lft forever preferred_lft forever

3608: docker0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1450 qdisc noqueue state UP

    link/ether 02:42:31:8f:d3:02 brd ff:ff:ff:ff:ff:ff

    inet 172.17.34.1/24 brd 172.17.34.255 scope global docker0

       valid_lft forever preferred_lft forever

    inet6 fe80::42:31ff:fe8f:d302/64 scope link

       valid_lft forever preferred_lft forever


注:

1. 确保docker0与flannel.1在同一网段。


2. 测试不同节点互通,在当前节点访问另一个Node节点docker0 IP:

# ping 172.17.58.1

PING 172.17.58.1 (172.17.58.1) 56(84) bytes of data.

64 bytes from 172.17.58.1: icmp_seq=1 ttl=64 time=0.263 ms

64 bytes from 172.17.58.1: icmp_seq=2 ttl=64 time=0.204 ms

如果能通说明Flannel部署成功。如果不通检查下日志:journalctl -u flannel


在Master节点部署组件

在部署Kubernetes之前一定要确保etcd、flannel、docker是正常工作的,否则先解决问题再继续。

生成证书

创建CA证书:

# cat ca-config.json

{

  "signing": {

    "default": {

      "expiry": "87600h"

    },

    "profiles": {

      "kubernetes": {

         "expiry": "87600h",

         "usages": [

            "signing",

            "key encipherment",

            "server auth",

            "client auth"

        ]

      }

    }

  }

}


# cat ca-csr.json

{

    "CN": "kubernetes",

    "key": {

        "algo": "rsa",

        "size": 2048

    },

    "names": [

        {

            "C": "CN",

            "L": "Beijing",

            "ST": "Beijing",

            "O": "k8s",

            "OU": "System"

        }

    ]

}


# cfssl gencert -initca ca-csr.json | cfssljson -bare ca -


生成apiserver证书:

# cat server-csr.json

{

    "CN": "kubernetes",

    "hosts": [

"10.0.0.1",         //这是后面dns要使用的虚 拟网络的网关,不用改,就用这个切忌

      "127.0.0.1",

      "10.206.176.19",

      "10.206.240.188",

      "10.206.240.189",

      "kubernetes",

      "kubernetes.default",

      "kubernetes.default.svc",

      "kubernetes.default.svc.cluster",

      "kubernetes.default.svc.cluster.local"

    ],

    "key": {

        "algo": "rsa",

        "size": 2048

    },

    "names": [

        {

            "C": "CN",

            "L": "BeiJing",

            "ST": "BeiJing",

            "O": "k8s",

            "OU": "System"

        }

    ]

}


# cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=kubernetes server-csr.json | cfssljson -bare server


生成kube-proxy证书:

# cat kube-proxy-csr.json

{

  "CN": "system:kube-proxy",

  "hosts": [],

  "key": {

    "algo": "rsa",

    "size": 2048

  },

  "names": [

    {

      "C": "CN",

      "L": "BeiJing",

      "ST": "BeiJing",

      "O": "k8s",

      "OU": "System"

    }

  ]

}


# cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=kubernetes kube-proxy-csr.json | cfssljson -bare kube-proxy


最终生成以下证书文件:

# ls *pem

ca-key.pem  ca.pem  kube-proxy-key.pem  kube-proxy.pem  server-key.pem  server.pem

部署apiserver组件

下载二进制包:https://github.com/kubernetes/kubernetes/blob/master/CHANGELOG-1.11.md下载这个包(kubernetes-server-linux-amd64.tar.gz)就够了,包含了所需的所有组件。

# mkdir /opt/kubernetes/{bin,cfg,ssl} -pv

# tar zxvf kubernetes-server-linux-amd64.tar.gz

# cd kubernetes/server/bin

# cp kube-apiserver kube-scheduler kube-controller-manager kubectl /opt/kubernetes/bin

从生成证书的机器拷贝证书到master1,master2:

# scp server.pem  server-key.pem ca.pem ca-key.pem k8s-master1:/opt/kubernetes/ssl/

# scp server.pem  server-key.pem ca.pem ca-key.pem k8s-master2:/opt/kubernetes/ssl/


创建token文件,后面会讲到:

# cat /opt/kubernetes/cfg/token.csv

674c457d4dcf2eefe4920d7dbb6b0ddc,kubelet-bootstrap,10001,"system:kubelet-bootstrap"

第一列:随机字符串,自己可生成第二列:用户名第三列:UID第四列:用户组


创建apiserver配置文件:

# cat /opt/kubernetes/cfg/kube-apiserver

KUBE_APISERVER_OPTS="--logtostderr=true \

--v=4 \

--etcd-servers=https://10.206.240.189:2379,https://10.206.240.188:2379,https://10.206.240.111:2379 \

--bind-address=10.206.240.189 \

--secure-port=6443 \

--advertise-address=10.206.240.189 \

--allow-privileged=true \

--service-cluster-ip-range=10.0.0.0/24 \   //这里就用这个网段,切忌不要改

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

--authorization-mode=RBAC,Node \

--enable-bootstrap-token-auth \

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

--service-node-port-range=30000-50000 \

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

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

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

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

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

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

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


配置好前面生成的证书,确保能连接etcd。


参数说明:

* --logtostderr启用日志

* --v日志等级

* --etcd-servers etcd集群地址

* --bind-address监听地址

* --secure-port https安全端口

* --advertise-address集群通告地址

* --allow-privileged启用授权

* --service-cluster-ip-range Service虚拟IP地址段

* --enable-admission-plugins准入控制模块

* --authorization-mode认证授权,启用RBAC授权和节点自管理

* --enable-bootstrap-token-auth启用TLS bootstrap功能,后面会讲到

* --token-auth-file token文件

* --service-node-port-range Service Node类型默认分配端口范围


systemd管理apiserver:

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

[Unit]

Description=Kubernetes API Server

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


[Service]

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

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

Restart=on-failure

[Install]

WantedBy=multi-user.target


启动:

# systemctl daemon-reload

# systemctl enable kube-apiserver

# systemctl start kube-apiserver

部署schduler组件

创建schduler配置文件:

# cat /opt/kubernetes/cfg/kube-scheduler


KUBE_SCHEDULER_OPTS="--logtostderr=true \

--v=4 \

--master=127.0.0.1:8080 \

--leader-elect"

参数说明:

* --master连接本地apiserver

* --leader-elect当该组件启动多个时,自动选举(HA)


systemd管理schduler组件:

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

[Unit]

Description=Kubernetes Scheduler

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


[Service]

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

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

Restart=on-failure

[Install]

WantedBy=multi-user.target

启动:

# systemctl daemon-reload

# systemctl enable kube-scheduler

# systemctl start kube-scheduler


部署controller-manager组件

创建controller-manager配置文件:

# cat /opt/kubernetes/cfg/kube-controller-manager

KUBE_CONTROLLER_MANAGER_OPTS="--logtostderr=true \

--v=4 \

--master=127.0.0.1:8080 \

--leader-elect=true \

--address=127.0.0.1 \

--service-cluster-ip-range=10.0.0.0/24 \    //这是后面dns要使用的虚拟网络,不用改,就用这个  切忌

--cluster-name=kubernetes \

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

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

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

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


systemd管理controller-manager组件:

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

[Unit]

Description=Kubernetes Controller Manager

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


[Service]

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

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

Restart=on-failure


[Install]

WantedBy=multi-user.target


 启动:

# systemctl daemon-reload

# systemctl enable kube-controller-manager

# systemctl start kube-controller-manager

所有组件都已经启动成功,通过kubectl工具查看当前集群组件状态:

# /opt/kubernetes/bin/kubectl get cs

NAME                 STATUS    MESSAGE             ERROR

scheduler            Healthy   ok                  

etcd-0               Healthy   {"health":"true"}   

etcd-2               Healthy   {"health":"true"}   

etcd-1               Healthy   {"health":"true"}   

controller-manager   Healthy   ok

如上输出说明组件都正常。

在Node节点部署组件

Master apiserver启用TLS认证后,Node节点kubelet组件想要加入集群,必须使用CA签发的有效证书才能与apiserver通信,当Node节点很多时,签署证书是一件很繁琐的事情,因此有了TLS Bootstrapping机制,kubelet会以一个低权限用户自动向apiserver申请证书,kubelet的证书由apiserver动态签署。

认证大致工作流程如图所示:


下面这些操作在master节点完成:

将kubelet-bootstrap用户绑定到系统集群角色

# /opt/kubernetes/bin/kubectl create clusterrolebinding kubelet-bootstrap \

  --clusterrole=system:node-bootstrapper \

  --user=kubelet-bootstrap


创建kubeconfig文件:

在生成kubernetes证书的目录下执行以下命令生成kubeconfig文件:


指定apiserver内网负载均衡地址

# KUBE_APISERVER="https://10.206.176.19:6443"

# BOOTSTRAP_TOKEN=674c457d4dcf2eefe4920d7dbb6b0ddc


#设置集群参数

# /opt/kubernetes/bin/kubectl config set-cluster kubernetes \

  --certificate-authority=./ca.pem \

  --embed-certs=true \

  --server=${KUBE_APISERVER} \

  --kubeconfig=bootstrap.kubeconfig


#设置客户端认证参数

# /opt/kubernetes/bin/kubectl config set-credentials kubelet-bootstrap \

  --token=${BOOTSTRAP_TOKEN} \

  --kubeconfig=bootstrap.kubeconfig


#设置上下文参数

# /opt/kubernetes/bin/kubectl config set-context default \

  --cluster=kubernetes \

  --user=kubelet-bootstrap \

  --kubeconfig=bootstrap.kubeconfig


#设置默认上下文

# /opt/kubernetes/bin/kubectl config use-context default --kubeconfig=bootstrap.kubeconfig


#创建kube-proxy kubeconfig文件


# /opt/kubernetes/bin/kubectl config set-cluster kubernetes \

  --certificate-authority=./ca.pem \

  --embed-certs=true \

  --server=${KUBE_APISERVER} \

  --kubeconfig=kube-proxy.kubeconfig


# /opt/kubernetes/bin/kubectl config set-credentials kube-proxy \

  --client-certificate=./kube-proxy.pem \

  --client-key=./kube-proxy-key.pem \

  --embed-certs=true \

  --kubeconfig=kube-proxy.kubeconfig


# /opt/kubernetes/bin/kubectl config set-context default \

  --cluster=kubernetes \

  --user=kube-proxy \

  --kubeconfig=kube-proxy.kubeconfig


# /opt/kubernetes/bin/kubectl config use-context default --kubeconfig=kube-proxy.kubeconfig


# ls

bootstrap.kubeconfig  kube-proxy.kubeconfig

必看:将这两个文件拷贝到Node节点/opt/kubernetes/cfg目录下。


 ----------------------下面这些操作在node节点完成:---------------------------

部署kubelet组件

将前面下载的二进制包中的kubelet和kube-proxy拷贝到/opt/kubernetes/bin目录下。

创建kubelet配置文件:

# vim /opt/kubernetes/cfg/kubelet

KUBELET_OPTS="--logtostderr=true \

--v=4 \

--hostname-override=10.206.240.112 \

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

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

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

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

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

参数说明:

* --hostname-override在集群中显示的主机名

* --kubeconfig指定kubeconfig文件位置,会自动生成

* --bootstrap-kubeconfig指定刚才生成的bootstrap.kubeconfig文件

* --cert-dir颁发证书存放位置

* --pod-infra-container-image管理Pod网络的镜像


其中/opt/kubernetes/cfg/kubelet.config配置文件如下:

# vim /opt/kubernetes/cfg/kubelet.config

kind: KubeletConfiguration

apiVersion: kubelet.config.k8s.io/v1beta1

address: 10.206.240.112

port: 10250

readOnlyPort: 10255

cgroupDriver: cgroupfs

clusterDNS: ["10.0.0.2"]     //不要改,就是这个ip

clusterDomain: cluster.local.

failSwapOn: false

authentication:

  anonymous:

    enabled: true

  webhook:

    enabled: false


systemd管理kubelet组件:

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

[Unit]

Description=Kubernetes Kubelet

After=docker.service

Requires=docker.service


[Service]

EnvironmentFile=/opt/kubernetes/cfg/kubelet

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

Restart=on-failure

KillMode=process


[Install]

WantedBy=multi-user.target


启动:

# systemctl daemon-reload

# systemctl enable kubelet

# systemctl start kubelet


在Master审批Node加入集群:

启动后还没加入到集群中,需要手动允许该节点才可以。在Master节点查看请求签名的Node:

# /opt/kubernetes/bin/kubectl get csr

# /opt/kubernetes/bin/kubectl certificate approve XXXXID

# /opt/kubernetes/bin/kubectl get node

部署kube-proxy组件

创建kube-proxy配置文件:

# cat /opt/kubernetes/cfg/kube-proxy

KUBE_PROXY_OPTS="--logtostderr=true \

--v=4 \

--hostname-override=10.206.240.111 \

--cluster-cidr=10.0.0.0/24 \           //不要改,就是这个ip

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


systemd管理kube-proxy组件:

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

[Unit]

Description=Kubernetes Proxy

After=network.target


[Service]

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

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

Restart=on-failure

[Install]

WantedBy=multi-user.target 

启动:

# systemctl daemon-reload

# systemctl enable kube-proxy

# systemctl start kube-proxy

查看集群状态

# /opt/kubernetes/bin/kubectl get node

NAME             STATUS    ROLES     AGE       VERSION

10.206.240.111   Ready     <none>    28d       v1.11.0

10.206.240.112   Ready     <none>    28d       v1.11.0


# /opt/kubernetes/bin/kubectl get cs

NAME                      STATUS   MESSAGE             ERROR

controller-manager    Healthy    ok                  

scheduler                  Healthy    ok                  

etcd-2                      Healthy    {"health":"true"}   

etcd-1                      Healthy    {"health":"true"}   

etcd-0                      Healthy    {"health":"true"}

















       




 

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