k8s1.13.0二进制部署-master节点（三）
时间:2022-07-26
本文章向大家介绍k8s1.13.0二进制部署-master节点（三），主要内容包括其使用实例、应用技巧、基本知识点总结和需要注意事项，具有一定的参考价值，需要的朋友可以参考一下。
部署apiserver
创建生成CSR的JSON配置文件
[root@k8s-master1 ssl]# vim kubernetes-csr.json
{
"CN": "kubernetes",
"hosts": [
"127.0.0.1",
"192.168.0.123",
"192.168.0.124",
"192.168.0.130",
"10.0.0.1",
"kubernetes",
"kubernetes.default",
"kubernetes.default.svc",
"kubernetes.default.svc.cluster",
"kubernetes.default.svc.cluster.local"
],
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"ST": "BeiJing",
"L": "BeiJing",
"O": "k8s",
"OU": "System"
}
]
}生成kubernetes证书和私钥
cfssl gencert -ca=/opt/kubernetes/ssl/ca.pem
-ca-key=/opt/kubernetes/ssl/ca-key.pem
-config=/opt/kubernetes/ssl/ca-config.json
-profile=kubernetes kubernetes-csr.json | cfssljson -bare kubernetes分发证书
[root@k8s-master1 ssl]# cp kubernetes*.pem /opt/kubernetes/ssl/准备软件包
下载二进制包：https://github.com/kubernetes/kubernetes
cd /usr/local/src/
wget https://dl.k8s.io/v1.13.0/kubernetes-server-linux-amd64.tar.gz
tar xf kubernetes-server-linux-amd64.tar.gz
cd kubernetes/server/bin/
cp kube-apiserver kube-scheduler kube-controller-manager kubectl /opt/kubernetes/bin/创建kube-apiserver使用的客户端token文件
export BOOTSTRAP_TOKEN=$(head -c 16 /dev/urandom | od -An -t x | tr -d ' ')
cat > /opt/kubernetes/cfg/token.csv <<EOF
${BOOTSTRAP_TOKEN},kubelet-bootstrap,10001,"system:kubelet-bootstrap"
EOF创建kube-apiserver配置文件
[root@k8s-master1 ~]# vim /opt/kubernetes/cfg/kube-apiserver
KUBE_APISERVER_OPTS="--logtostderr=false
--v=4
--log-dir=/opt/kubernetes/log
--etcd-servers=https://192.168.0.123:2379,https://192.168.0.125:2379,https://192.168.0.126:2379
--bind-address=0.0.0.0
--secure-port=6443
--advertise-address=192.168.0.123
--allow-privileged=true
--service-cluster-ip-range=10.0.0.0/24
--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/kubernetes.pem
--tls-private-key-file=/opt/kubernetes/ssl/kubernetes-key.pem
--client-ca-file=/opt/kubernetes/ssl/ca.pem
--service-account-key-file=/opt/kubernetes/ssl/ca-key.pem
--etcd-cafile=/opt/kubernetes/ssl/ca.pem
--etcd-certfile=/opt/kubernetes/ssl/etcd.pem
--etcd-keyfile=/opt/kubernetes/ssl/etcd-key.pem"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
创建kube-apiserver系统服务
[root@k8s-master1 ~]# vim /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
RestartSec=5
Type=notify
LimitNOFILE=65536
[Install]
WantedBy=multi-user.target启动apiserver
systemctl daemon-reload
systemctl enable kube-apiserver
systemctl restart kube-apiserver
systemctl status kube-apiserver通过url访问api接口
[root@k8s-master1 ~]# curl -L --cacert /opt/kubernetes/ssl/ca.pem https://192.168.0.123:6443/api
{
"kind": "APIVersions",
"versions": [
"v1"
],
"serverAddressByClientCIDRs": [
{
"clientCIDR": "0.0.0.0/0",
"serverAddress": "192.168.0.123:6443"
}
]
}
[root@k8s-master1 ~]# curl -L http://127.0.0.1:8080/api
{
"kind": "APIVersions",
"versions": [
"v1"
],
"serverAddressByClientCIDRs": [
{
"clientCIDR": "0.0.0.0/0",
"serverAddress": "192.168.0.123:6443"
}
]
}部署Controller Manager
创建配置文件
[root@k8s-master1 ~]# vim /opt/kubernetes/cfg/kube-controller-manager
KUBE_CONTROLLER_MANAGER_OPTS="--logtostderr=false
--v=4
--log-dir=/opt/kubernetes/log
--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
--experimental-cluster-signing-duration=87600h0m0s"创建服务文件
[root@k8s-master1 ~]# vim /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
RestartSec=5
[Install]
WantedBy=multi-user.target启动服务
systemctl daemon-reload
systemctl enable kube-controller-manager
systemctl restart kube-controller-manager
systemctl status kube-controller-manager部署scheduller
创建配置文件
[root@k8s-master1 ~]# vim /opt/kubernetes/cfg/kube-scheduler
KUBE_SCHEDULER_OPTS="--logtostderr=false
--v=4
--log-dir=/opt/kubernetes/log
--master=127.0.0.1:8080
--leader-elect"--master 连接本地apiserver --leader-elect 当该组件启动多个时，自动选举（HA）
创建服务文件
[root@k8s-master1 ~]# vim /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
RestartSec=5
[Install]
WantedBy=multi-user.target启动服务
systemctl daemon-reload
systemctl enable kube-scheduler
systemctl restart kube-scheduler
systemctl status kube-schedulermaster2部署
将master1的配置复制到master2，修改对应ip启动服务即可
scp -r /opt/kubernetes 192.168.0.124:/opt/
scp /usr/lib/systemd/system/kube-* 192.168.0.124:/usr/lib/systemd/system/访问master2 API接口
[root@k8s-master2 ~]# curl -L --cacert /opt/kubernetes/ssl/ca.pem https://192.168.0.124:6443/api
{
"kind": "APIVersions",
"versions": [
"v1"
],
"serverAddressByClientCIDRs": [
{
"clientCIDR": "0.0.0.0/0",
"serverAddress": "192.168.0.124:6443"
}
]
}
[root@k8s-master2 ~]# curl -L http://127.0.0.1:8080/api
{
"kind": "APIVersions",
"versions": [
"v1"
],
"serverAddressByClientCIDRs": [
{
"clientCIDR": "0.0.0.0/0",
"serverAddress": "192.168.0.124:6443"
}
]
}配置apiserver的高可用
安装keepalived
yum -y install keepalivedmaster1 的keepalived配置文件
[root@k8s-master1 ~]# cat /etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {
# 接收邮件地址
notification_email {
acassen@firewall.loc
failover@firewall.loc
sysadmin@firewall.loc
}
# 邮件发送地址
notification_email_from Alexandre.Cassen@firewall.loc
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id API_MASTER
}
vrrp_script check_api {
script "/etc/keepalived/check_api.sh"
}
vrrp_instance VI_1 {
state MASTER
interface ens32
virtual_router_id 51 # VRRP 路由 ID实例，每个实例是唯一的
priority 100 # 优先级，备服务器设置 90
advert_int 1 # 指定VRRP 心跳包通告间隔时间，默认1秒
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.0.130/24
}
track_script {
check_api
}
}master2的keepalived配置文件
[root@k8s-master2 ~]# cat /etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {
# 接收邮件地址
notification_email {
acassen@firewall.loc
failover@firewall.loc
sysadmin@firewall.loc
}
# 邮件发送地址
notification_email_from Alexandre.Cassen@firewall.loc
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id API_MASTER
}
vrrp_script check_api {
script "/etc/keepalived/check_api.sh"
}
vrrp_instance VI_1 {
state BACKUP
interface ens32
virtual_router_id 51 # VRRP 路由 ID实例，每个实例是唯一的
priority 90 # 优先级，备服务器设置 90
advert_int 1 # 指定VRRP 心跳包通告间隔时间，默认1秒
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.0.130/24
}
track_script {
check_api
}
}准备检查apiserver的脚本
[root@k8s-master1 ~]# vim /etc/keepalived/check_api.sh
count=$(ps -ef |grep kube-apiserver |egrep -cv "grep|$$")
if [ "$count" -eq 0 ];then
systemctl stop keepalived
fi
[root@k8s-master1 ~]# chmod +x /etc/keepalived/check_api.sh启动keepalived
systemctl start keepalived
systemctl enable keepalived
systemctl status keepalived高可用测试
查看ip信息
[root@k8s-master1 ~]# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: ens32: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
link/ether 00:0c:29:8a:2b:5f brd ff:ff:ff:ff:ff:ff
inet 192.168.0.123/24 brd 192.168.0.255 scope global ens32
valid_lft forever preferred_lft forever
inet 192.168.0.130/24 scope global secondary ens32
valid_lft forever preferred_lft forever
inet6 fe80::20c:29ff:fe8a:2b5f/64 scope link
valid_lft forever preferred_lft forever
[root@k8s-master2 ~]# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: ens32: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
link/ether 00:0c:29:77:dc:9c brd ff:ff:ff:ff:ff:ff
inet 192.168.0.124/24 brd 192.168.0.255 scope global ens32
valid_lft forever preferred_lft forever
inet6 fe80::20c:29ff:fe77:dc9c/64 scope link
valid_lft forever preferred_lft forevervip绑定在master1，访问vip
[root@k8s-master1 ~]# curl -L --cacert /opt/kubernetes/ssl/ca.pem https://192.168.0.130:6443/api
{
"kind": "APIVersions",
"versions": [
"v1"
],
"serverAddressByClientCIDRs": [
{
"clientCIDR": "0.0.0.0/0",
"serverAddress": "192.168.0.123:6443"
}
]
}停止master1的apiserver，再次访问vip
[root@k8s-master1 ~]# curl -L --cacert /opt/kubernetes/ssl/ca.pem https://192.168.0.130:6443/api
{
"kind": "APIVersions",
"versions": [
"v1"
],
"serverAddressByClientCIDRs": [
{
"clientCIDR": "0.0.0.0/0",
"serverAddress": "192.168.0.124:6443"
}
]
}查看ip信息，vip绑定在master2
[root@k8s-master1 ~]# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: ens32: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
link/ether 00:0c:29:8a:2b:5f brd ff:ff:ff:ff:ff:ff
inet 192.168.0.123/24 brd 192.168.0.255 scope global ens32
valid_lft forever preferred_lft forever
inet6 fe80::20c:29ff:fe8a:2b5f/64 scope link
valid_lft forever preferred_lft forever
[root@k8s-master2 ~]# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: ens32: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
link/ether 00:0c:29:77:dc:9c brd ff:ff:ff:ff:ff:ff
inet 192.168.0.124/24 brd 192.168.0.255 scope global ens32
valid_lft forever preferred_lft forever
inet 192.168.0.130/24 scope global secondary ens32
valid_lft forever preferred_lft forever
inet6 fe80::20c:29ff:fe77:dc9c/64 scope link
valid_lft forever preferred_lft forever配置kubectl命令行工具
创建admin证书签名请求
[root@k8s-master1 ssl]# vim admin-csr.json
{
"CN": "admin",
"hosts": [],
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"ST": "BeiJing",
"L": "BeiJing",
"O": "system:masters",
"OU": "System"
}
]
}生成admin证书和密钥
[root@k8s-master1 ssl]# cfssl gencert -ca=/opt/kubernetes/ssl/ca.pem
-ca-key=/opt/kubernetes/ssl/ca-key.pem
-config=/opt/kubernetes/ssl/ca-config.json
-profile=kubernetes admin-csr.json | cfssljson -bare admin
[root@k8s-master1 ssl]# cp admin*.pem /opt/kubernetes/ssl/设置集群参数
kubectl config set-cluster kubernetes
--certificate-authority=/opt/kubernetes/ssl/ca.pem
--embed-certs=true
--server=https://192.168.0.130:6443设置客户端认证参数
kubectl config set-credentials admin
--client-certificate=/opt/kubernetes/ssl/admin.pem
--embed-certs=true
--client-key=/opt/kubernetes/ssl/admin-key.pem设置上下文参数
kubectl config set-context kubernetes
--cluster=kubernetes
--user=admin设置默认上下文
kubectl config use-context kubernetes查看集群信息
[root@k8s-master1 ~]# kubectl get cs
NAME STATUS MESSAGE ERROR
controller-manager Healthy ok
scheduler Healthy ok
etcd-1 Healthy {"health":"true"}
etcd-2 Healthy {"health":"true"}
etcd-0 Healthy {"health":"true"}
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