搭建K8S高可用集群(二进制方式)

关闭swap

关闭selinux

关闭iptables

master01操作:

cat cfssl.sh

#!/bin/bash

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

自签Etcd SSL证书

cat cert-etcd.sh

cat > ca-config.json <{

"signing": {

"default": {

"expiry": "87600h"

},

"profiles": {

"www": {

"expiry": "87600h",

"usages": [

"signing",

"key encipherment",

"server auth",

"client auth"

]

}

}

}

}

EOF

cat > ca-csr.json <{

"CN": "etcd CA",

"key": {

"algo": "rsa",

"size": 2048

},

"names": [

{

"C": "CN",

"L": "Beijing",

"ST": "Beijing"

}

]

}

EOF

cat > server-csr.json <{

"CN": "etcd",

"hosts": [

"192.168.247.161",

"192.168.247.162",

"192.168.247.163"

],

"key": {

"algo": "rsa",

"size": 2048

},

"names": [

{

"C": "CN",

"L": "BeiJing",

"ST": "BeiJing"

}

]

}

EOF

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

ll *.pem

-rw------- 1 root root 1675 Jan 11 15:50 ca-key.pem

-rw-r--r-- 1 root root 1265 Jan 11 15:50 ca.pem

-rw------- 1 root root 1679 Jan 11 15:50 server-key.pem

-rw-r--r-- 1 root root 1338 Jan 11 15:50 server.pem

Etcd数据库集群部署

master01 02 03操作:

mkdir -pv /opt/etcd/{bin,cfg,ssl}

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

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

master01操作:

cd cert-etcd/

[root@master01 cert-etcd]# ll

total 40

-rw-r--r-- 1 root root 287 Jan 11 15:50 ca-config.json

-rw-r--r-- 1 root root 956 Jan 11 15:50 ca.csr

-rw-r--r-- 1 root root 209 Jan 11 15:50 ca-csr.json

-rw------- 1 root root 1675 Jan 11 15:50 ca-key.pem

-rw-r--r-- 1 root root 1265 Jan 11 15:50 ca.pem

-rw-r--r-- 1 root root 1013 Jan 11 15:50 server.csr

-rw-r--r-- 1 root root 296 Jan 11 15:50 server-csr.json

-rw------- 1 root root 1679 Jan 11 15:50 server-key.pem

-rw-r--r-- 1 root root 1338 Jan 11 15:50 server.pem

-rwxr-xr-x 1 root root 1076 Jan 11 15:50 ssl-etcd.sh

[root@master01 cert-etcd]# cp *.pem /opt/etcd/ssl/

scp -r /opt/etcd master02:/opt/

scp -r /opt/etcd master03:/opt/

分别在master01 02 03操作:

[root@master01 ~]# cat etcd.sh

#!/bin/bash

example: ./etcd.sh etcd01 192.168.1.10 etcd02=https://192.168.1.11:2380,etcd03=https://192.168.1.12:2380

ETCD_NAME=$1

ETCD_IP=$2

ETCD_CLUSTER=$3

WORK_DIR=/opt/etcd

cat <$WORK_DIR/cfg/etcd

#[Member]

ETCD_NAME="${ETCD_NAME}"

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

ETCD_LISTEN_PEER_URLS="https://${ETCD_IP}:2380"

ETCD_LISTEN_CLIENT_URLS="https://${ETCD_IP}:2379"

#[Clustering]

ETCD_INITIAL_ADVERTISE_PEER_URLS="https://${ETCD_IP}:2380"

ETCD_ADVERTISE_CLIENT_URLS="https://${ETCD_IP}:2379"

ETCD_INITIAL_CLUSTER="${ETCD_NAME}=https://${ETCD_IP}:2380,${ETCD_CLUSTER}"

ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"

ETCD_INITIAL_CLUSTER_STATE="new"

EOF

cat

[Unit]

Description=Etcd Server

After=network.target

After=network-online.target

Wants=network-online.target

[Service]

Type=notify

EnvironmentFile=${WORK_DIR}/cfg/etcd

ExecStart=${WORK_DIR}/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=${WORK_DIR}/ssl/server.pem \

--key-file=${WORK_DIR}/ssl/server-key.pem \

--peer-cert-file=${WORK_DIR}/ssl/server.pem \

--peer-key-file=${WORK_DIR}/ssl/server-key.pem \

--trusted-ca-file=${WORK_DIR}/ssl/ca.pem \

--peer-trusted-ca-file=${WORK_DIR}/ssl/ca.pem

Restart=on-failure

LimitNOFILE=65536

[Install]

WantedBy=multi-user.target

EOF

systemctl daemon-reload

systemctl start etcd

systemctl enable etcd

./etcd.sh etcd01 192.168.247.161 etcd02=https://192.168.247.162:2380,etcd03=https://192.168.247.163:2380

scp etcd.sh master02:/root/

scp etcd.sh master03:/root/

[root@master02 ~]# ./etcd.sh etcd02 192.168.247.162 etcd01=https://192.168.247.161:2380,etcd03=https://192.168.247.163:2380

[root@master03 ~]# ./etcd.sh etcd03 192.168.247.163 etcd01=https://192.168.247.161:2380,etcd02=https://192.168.247.162:2380

[root@master01 ~]# systemctl restart etcd

cd /opt/etcd/ssl

/opt/etcd/bin/etcdctl \

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

--endpoints="https://192.168.247.161:2379,https://192.168.247.162:2379,https://192.168.247.163:2379" \

cluster-health

member 1afd7ff8f95cf93 is healthy: got healthy result from https://192.168.247.161:2379

member 8f4e6ce663f0d49a is healthy: got healthy result from https://192.168.247.162:2379

member b6230d9c6f20feeb is healthy: got healthy result from https://192.168.247.163:2379

cluster is healthy

如有报错,查看/var/log/message日志

node节点安装docker

yum remove -y docker docker-common docker-selinux docker-engine

yum install -y yum-utils device-mapper-persistent-data lvm2

wget -O /etc/yum.repos.d/docker-ce.repo https://download.docker.com/linux/centos/docker-ce.repo

sed -i 's+download.docker.com+mirrors.tuna.tsinghua.edu.cn/docker-ce+' /etc/yum.repos.d/docker-ce.repo

yum makecache fast

yum install -y docker-ce

systemctl enable docker

systemctl start docker

docker version

如果拉取镜像较慢,可以配置daocloud提供的docker加速器

Flannel网络部署

master01执行:

pwd

/opt/etcd/ssl

/opt/etcd/bin/etcdctl \

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

--endpoints="https://192.168.247.161:2379,https://192.168.247.162:2379,https://192.168.247.163:2379" \

set /coreos.com/network/config '{ "Network": "172.17.0.0/16", "Backend": {"Type": "vxlan"}}'

node01执行

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,cfg,ssl}

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

cat /opt/kubernetes/cfg/flanneld

FLANNEL_OPTIONS="--etcd-endpoints=https://192.168.247.161:2379,https://192.168.247.162:2379,https://192.168.247.163:2379 -etcd-cafile=/opt/etcd/ssl/ca.pem -etcd-certfile=/opt/etcd/ssl/server.pem -etcd-keyfile=/opt/etcd/ssl/server-key.pem"

将master节点的/opt/etcd/ssl/*拷贝到node节点

[root@master03 ~]# scp -r /opt/etcd/ssl node01:/opt/etcd/

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

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

重启flannel和docker:

systemctl daemon-reload

systemctl start flanneld

systemctl enable flanneld

systemctl restart docker

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

cat /run/flannel/subnet.env

DOCKER_OPT_BIP="--bip=172.17.12.1/24"

DOCKER_OPT_IPMASQ="--ip-masq=false"

DOCKER_OPT_MTU="--mtu=1450"

DOCKER_NETWORK_OPTIONS=" --bip=172.17.12.1/24 --ip-masq=false --mtu=1450"

ip a

5: docker0: mtu 1500 qdisc noqueue state DOWN group default

link/ether 02:42:f0:62:07:73 brd ff:ff:ff:ff:ff:ff

inet 172.17.12.1/24 brd 172.17.12.255 scope global docker0

valid_lft forever preferred_lft forever

6: flannel.1: mtu 1450 qdisc noqueue state UNKNOWN group default

link/ether ca:e9:e0:d4:05:be brd ff:ff:ff:ff:ff:ff

inet 172.17.12.0/32 scope global flannel.1

valid_lft forever preferred_lft forever

inet6 fe80::c8e9:e0ff:fed4:5be/64 scope link

valid_lft forever preferred_lft forever

scp -r /opt/kubernetes node02:/opt/

cd /usr/lib/systemd/system/

scp flanneld.service docker.service node02:/usr/lib/systemd/system/

scp -r /opt/etcd/ssl/ node02:/opt/etcd/

node02执行:

mkdir /opt/etcd

systemctl daemon-reload

systemctl start flanneld

systemctl enable flanneld

systemctl restart docker

ip a

5: docker0: mtu 1500 qdisc noqueue state DOWN group default

link/ether 02:42:ca:2c:48:df brd ff:ff:ff:ff:ff:ff

inet 172.17.16.1/24 brd 172.17.16.255 scope global docker0

valid_lft forever preferred_lft forever

6: flannel.1: mtu 1450 qdisc noqueue state UNKNOWN group default

link/ether ee:73:b2:e8:46:c1 brd ff:ff:ff:ff:ff:ff

inet 172.17.16.0/32 scope global flannel.1

valid_lft forever preferred_lft forever

inet6 fe80::ec73:b2ff:fee8:46c1/64 scope link

valid_lft forever preferred_lft forever

[root@node02 opt]# ping 172.17.12.1

PING 172.17.12.1 (172.17.12.1) 56(84) bytes of data.

64 bytes from 172.17.12.1: icmp_seq=1 ttl=64 time=1.07 ms

64 bytes from 172.17.12.1: icmp_seq=2 ttl=64 time=0.300 ms

[root@node01 system]# ping 172.17.16.1

PING 172.17.16.1 (172.17.16.1) 56(84) bytes of data.

64 bytes from 172.17.16.1: icmp_seq=1 ttl=64 time=1.13 ms

自签APIServer SSL证书

在master01执行

cat cert-k8s.sh

#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"

]

}

}

}

}

EOF

cat > ca-csr.json <{

"CN": "kubernetes",

"key": {

"algo": "rsa",

"size": 2048

},

"names": [

{

"C": "CN",

"L": "Beijing",

"ST": "Beijing",

"O": "k8s",

"OU": "System"

}

]

}

EOF

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

#生成apiserver证书:

#注意IP地址,包括master和LB地址

cat > server-csr.json <{

"CN": "kubernetes",

"hosts": [

"10.0.0.1",

"127.0.0.1",

"192.168.247.160",

"192.168.247.161",

"192.168.247.162",

"192.168.247.163",

"192.168.247.164",

"192.168.247.165",

"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"

}

]

}

EOF

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"

}

]

}

EOF

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

cat > admin-csr.json <{

"CN": "admin",

"hosts": [],

"key": {

"algo": "rsa",

"size": 2048

},

"names": [

{

"C": "CN",

"L": "BeiJing",

"ST": "BeiJing",

"O": "system:masters",

"OU": "System"

}

]

}

EOF

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

ll *.pem

-rw------- 1 root root 1679 Jan 11 22:06 admin-key.pem

-rw-r--r-- 1 root root 1399 Jan 11 22:06 admin.pem

-rw------- 1 root root 1679 Jan 11 22:06 ca-key.pem

-rw-r--r-- 1 root root 1359 Jan 11 22:06 ca.pem

-rw------- 1 root root 1675 Jan 11 22:06 kube-proxy-key.pem

-rw-r--r-- 1 root root 1403 Jan 11 22:06 kube-proxy.pem

-rw------- 1 root root 1679 Jan 11 22:06 server-key.pem

-rw-r--r-- 1 root root 1651 Jan 11 22:06 server.pem

Master集群-部署Master组件

master01、02、03执行:

api-server:

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

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

cd kubernetes/server/bin

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

[root@master01 cert-k8s]# pwd

/root/cert-k8s

[root@master01 cert-k8s]# cp *.pem /opt/kubernetes/ssl/

head -c 16 /dev/urandom |od -An -t x |tr -d ' '

1c96cf8a12d4555a52e89bf3925a5c87

cat /opt/kubernetes/cfg/token.csv

1c96cf8a12d4555a52e89bf3925a5c87,kubelet-bootstrap,10001,"system:kubelet-bootstrap"

cat api-server.sh

#!/bin/bash

example: ./api-server.sh 192.168.247.161 https://192.168.247.161:2379,https://192.168.247.162:2379,https://192.168.247.163:2379

MASTER_IP=$1

ETCD_SERVERS=$2

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

KUBE_APISERVER_OPTS="--logtostderr=true \

--v=4 \

--etcd-servers=${ETCD_SERVERS} \

--bind-address=${MASTER_IP} \

--secure-port=6443 \

--advertise-address=${MASTER_IP} \

--allow-privileged=true \

--service-cluster-ip-range=10.0.0.0/24 \

--enable-admission-plugins=NamespaceLifecycle,LimitRanger,SecurityContextDeny,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"

EOF

cat

[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

EOF

systemctl daemon-reload

systemctl enable kube-apiserver

systemctl restart kube-apiserver

./api-server.sh 192.168.247.161 https://192.168.247.161:2379,https://192.168.247.162:2379,https://192.168.247.163:2379

scheduler组件

cat scheduler.sh

cat

KUBE_SCHEDULER_OPTS="--logtostderr=true \

--v=4 \

--master=127.0.0.1:8080 \

--leader-elect"

EOF

cat

[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

EOF

systemctl daemon-reload

systemctl enable kube-scheduler

systemctl restart kube-scheduler

./scheduler.sh

部署controller-manager组件

cat controller-manager.sh

cat

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 \

--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"

EOF

cat

[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

EOF

systemctl daemon-reload

systemctl enable kube-controller-manager

systemctl restart kube-controller-manager

sh controller-manager.sh

添加环境变量

K8S_HOME=/opt/kubernetes

PATH=$K8S_HOME/bin:$PATH

[root@master01 kubernetes]# kubectl get cs

NAME STATUS MESSAGE ERROR

scheduler Healthy ok

controller-manager Healthy ok

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

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

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

[root@master02 ~]# kubectl get cs

NAME STATUS MESSAGE ERROR

scheduler Healthy ok

controller-manager Healthy ok

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

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

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

[root@master03 ~]# kubectl get cs

NAME STATUS MESSAGE ERROR

scheduler Healthy ok

controller-manager Healthy ok

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

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

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

生成Node kubeconfig文件

[root@master01 ~]# scp kubernetes/server/bin/{kubelet,kube-proxy} node01:/opt/kubernetes/bin/

[root@master01 ~]# scp kubernetes/server/bin/{kubelet,kube-proxy} node02:/opt/kubernetes/bin/

master01执行:

kubectl create clusterrolebinding kubelet-bootstrap \

--clusterrole=system:node-bootstrapper \

--user=kubelet-bootstrap

在master01执行

cat kubeconfig.sh

创建kubelet bootstrapping kubeconfig

APISERVER=$1

SSL_DIR=$2

export BOOTSTRAP_TOKEN=cat /opt/kubernetes/cfg/token.csv |awk -F',' '{print $1}'

export KUBE_APISERVER="https://$APISERVER:6443"

设置集群参数

kubectl config set-cluster kubernetes \

--certificate-authority=$SSL_DIR/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=$SSL_DIR/ca.pem \

--embed-certs=true \

--server=${KUBE_APISERVER} \

--kubeconfig=kube-proxy.kubeconfig

kubectl config set-credentials kube-proxy \

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

--client-key=$SSL_DIR/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

./kubeconfig.sh 192.168.247.160 /opt/kubernetes/ssl

ll

total 16

-rw------- 1 root root 2169 Jan 12 08:09 bootstrap.kubeconfig

-rwxr-xr-x 1 root root 1419 Jan 12 08:07 kubeconfig.sh

-rw------- 1 root root 6271 Jan 12 08:09 kube-proxy.kubeconfig

scp bootstrap.kubeconfig kube-proxy.kubeconfig node01:/opt/kubernetes/cfg/

scp bootstrap.kubeconfig kube-proxy.kubeconfig node02:/opt/kubernetes/cfg/

部署Node组件

在node01、02执行:

部署kubelet组件

cat kubelet.sh

#!/bin/bash

NODE_IP=$1

cat

KUBELET_OPTS="--logtostderr=true \

--v=4 \

--address=${NODE_IP} \

--hostname-override=${NODE_IP} \

--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"

EOF

cat

kind: KubeletConfiguration

apiVersion: kubelet.config.k8s.io/v1beta1

address: ${NODE_IP}

port: 10250

readOnlyPort: 10255

cgroupDriver: cgroupfs

clusterDNS: ["10.0.0.2"]

clusterDomain: cluster.local.

failSwapOn: false

authentication:

anonymous:

enabled: true

EOF

cat

[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

EOF

systemctl daemon-reload

systemctl enable kubelet

systemctl restart kubelet

./kubelet.sh 192.168.247.171

./kubelet.sh 192.168.247.172

创建kube-proxy配置文件:

cat kube-proxy.sh

#!/bin/bash

NODE_IP=$1

cat

KUBE_PROXY_OPTS="--logtostderr=true \

--v=4 \

--hostname-override=${NODE_IP} \

--cluster-cidr=10.0.0.0/24 \

--proxy-mode=ipvs \

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

EOF

cat

[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

EOF

systemctl daemon-reload

systemctl enable kube-proxy

systemctl restart kube-proxy

./kube-proxy.sh 192.168.247.171

./kube-proxy.sh 192.168.247.172

使用nginx四层进行转发

[root@lb01 yum.repos.d]# cat nginx.repo

[nginx]

name=nginx repo

baseurl=http://nginx.org/packages/centos/7/$basearch/

gpgcheck=0

enabled=1

yum install nginx

cat /etc/nginx/nginx.conf

添加以下内容:

stream{

log_format main "$remote_addr $upstream_addr $time_local $status";

access_log /var/log/nginx/k8s-access.log main;

upstream k8s-apiserver {

server 192.168.247.161:6443;

server 192.168.247.162:6443;

server 192.168.247.163:6443;

}

server {

listen 0.0.0.0:6443;

proxy_pass k8s-apiserver;

}

}

yum install keepalived

yum install libnl3-devel ipset-devel

cat /etc/keepalived/keepalived.conf

! Configuration File for keepalived

global_defs {

notification_email {acassen@firewall.loc

br/>sysadmin@firewall.loc

notification_email_from Alexandre.Cassen@firewall.loc

smtp_server 192.168.200.1

smtp_connect_timeout 30

router_id LVS_DEVEL

vrrp_skip_check_adv_addr

vrrp_strict

vrrp_garp_interval 0

vrrp_gna_interval 0

}

vrrp_script check_nginx {

script "/etc/keepalived/check_nginx.sh"

}

vrrp_instance VI_1 {

state BACKUP

interface ens33

virtual_router_id 51

priority 90

advert_int 1

authentication {

auth_type PASS

auth_pass 1111

}

virtual_ipaddress {

192.168.247.160/24

}

track_script {

check_nginx

}

}

[root@lb02 ~]# cat /etc/keepalived/check_nginx.sh

#!/bin/bash

count=$(ps -ef |grep nginx |egrep -cv "grep|$$")

if [ "$count" -eq 0 ];then

systemctl stop keeplived

fi

chmod 755 check_nginx.sh

[root@master01 ~]# kubectl get csr

NAME AGE REQUESTOR CONDITION

node-csr-gvRm9pzQJCj4cp_hGYp5qwW93LLdAbVPtz7AaztlGv8 17m kubelet-bootstrap Pending

node-csr-luowueA4U43ca96d-Ff64X7o8p9BW6MGIxWfASUPukE 20m kubelet-bootstrap Pending

[root@master01 ~]# kubectl certificate approve node-csr-gvRm9pzQJCj4cp_hGYp5qwW93LLdAbVPtz7AaztlGv8

certificatesigningrequest.certificates.k8s.io/node-csr-gvRm9pzQJCj4cp_hGYp5qwW93LLdAbVPtz7AaztlGv8 approved

[root@master01 ~]# kubectl certificate approve node-csr-luowueA4U43ca96d-Ff64X7o8p9BW6MGIxWfASUPukE

certificatesigningrequest.certificates.k8s.io/node-csr-luowueA4U43ca96d-Ff64X7o8p9BW6MGIxWfASUPukE approved

[root@master01 ~]# kubectl get node

NAME STATUS ROLES AGE VERSION

192.168.247.171 Ready 12s v1.12.4

192.168.247.172 Ready 9m41s v1.12.4

[root@master01 ~]# kubectl run nginx --image=nginx --replicas=3

[root@master01 ~]# kubectl get pod -o wide

NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE

nginx-dbddb74b8-dkhcw 1/1 Running 0 38m 172.17.35.2 192.168.247.172

nginx-dbddb74b8-rdf2v 1/1 Running 0 38m 172.17.17.2 192.168.247.171

nginx-dbddb74b8-rn9l6 1/1 Running 0 38m 172.17.35.3 192.168.247.172

[root@master01 ~]# kubectl expose deployment nginx --port=88 --target-port=80 --type=NodePort

service/nginx exposed

[root@master01 ~]# kubectl get svc

NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE

kubernetes ClusterIP 10.0.0.1 443/TCP 12h

nginx NodePort 10.0.0.30 88:48363/TCP 6s

[root@master01 ~]# curl -I http://192.168.247.147:48363

HTTP/1.1 200 OK

Server: nginx/1.15.8

Date: Sat, 12 Jan 2019 03:54:14 GMT

Content-Type: text/html

Content-Length: 612

Last-Modified: Tue, 25 Dec 2018 09:56:47 GMT

Connection: keep-alive

ETag: "5c21fedf-264"

Accept-Ranges: bytes

[root@master01 ~]# curl -I http://192.168.247.146:48363

HTTP/1.1 200 OK

Server: nginx/1.15.8

Date: Sat, 12 Jan 2019 03:54:24 GMT

Content-Type: text/html

Content-Length: 612

Last-Modified: Tue, 25 Dec 2018 09:56:47 GMT

Connection: keep-alive

ETag: "5c21fedf-264"

Accept-Ranges: bytes

[root@node01 cfg]# curl 10.0.0.30:88

[root@node02 cfg]# curl 10.0.0.30:88

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