文章目录
- **一、部署** **Etcd** **集群:**
- **1****、生成证书:**
- **1****)、使用****cfssl****来生成自签证书,先下载****cfssl****工具:**
- **2****)、新建一个目录,用来存放生成** **etcd** **证书的文件,并在其目录下创建文件:**
- **3****)、生成证书,并查看**
- **2****、部署** **Etcd**
- **1****)、创建** **etcd** **工作目录,解压二进制包,并将需要的包移动到** **etcd** **工作目录**
- **2****)、创建** **etcd** **配置文件**
- **3****)、加入系统服务:****systemd** **管理** **etcd**
- **4****)将刚才生成的证书拷贝到配置文件中的位置:**
- **5****)启动并设置开机自启:**
- 二、在两个 node 节点上安装 Docker 及 etcd
- **1****、各** **node** **节点安装** **docker**
- **2****)、安装** **Docker** **并设置为开机自启动**
- **3****)、通过查看** **Docker** **版本查看** **Docker** **服务,并确保两个** **docker** **版本一致**
- **4****)、因为** **docker** **默认是从国外网站拉取镜像,如果网速慢,可以添加加速站点,然后重启** **docker**
- **2****、各** **node** **节点安装** **etcd**
- **1****)、创建工作目录:**
- **2****)、在** **master** **节点将各** **node** **需要的文件远程复制过去**
- **a****)****etcd** **配置文件**
- **b****)****系统服务:****systemd** **管理** **etcd**
- **c****)****Etcd** **生成的证书**
- **3****)、在各** **node** **节点修改配置文件**
- **3****、在各节点全部部署完成后,启动各节点** **etcd** **服务,并检查** **etcd** **集群状态:**
- 三、部署 Flannel 网络
- **1****、****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:**
- **2****、在各** **node** **节点部署** **Flannel** **网络**
- **1****)、首先将** **flannel-v0.10.0-linux-amd64.tar.gz** **包下载或移动到虚拟机:**
- **2****)、解压缩并创建工作目录,将解压缩后需要的二进制文件移动到工作目录**
- **3****)、在各** **node** **节点配置** **Flannel****,****systemd** **管理** **Flannel****、配置** **Docker** **启动指定子网段**
- **a****)****配置** **Flannel**
- **b****)****s****ystemd** **管理** **Flannel**
- **c****)配置** **Docker** **启动指定子网段**
- **d****)重启** **node1** **上的** **flannel** **和** **docker****,并检查是否生效:**
- **4****)将** **node2** **上需要的文件远程复制过去**
- **s****ystemd** **管理** **Flannel**
- **配置** **Docker** **启动指定子网段**
- **5****)重启** **node2** **上的** **flannel** **和** **docker****,并检查是否生效,然后使用** **ping** **命令,测试两台** **docker** **的连通性**
- **6****)确保****docker0****与****flannel.1****在同一网段。**
- **四、在** **master** **节点上部署组件:**
- **1****、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。**
- **2****、生成证书:**
- **1****)、创建存放证书的目录**
- 2)、创建生成证书的文件
- **3****)、生成证书**
- **a****、生成** **ca** **证书:**
- **b****、生成** **apiserver** **证书:**
- **c****、生成** **kube-proxy** **证书:**
- **d****、查看生成证书文件:(一共** **6** **个)**
- **3****、部署** **apiserver** **组件:**
- **1****)、把** **kubernetes-server-linux-amd64.tar.gz** **包传到虚拟机,****kubernetes-server-linux-amd64.tar.gz****,包含了所需的所有组件。**
- **2****)、创建工作目录,解压缩包,并将需要的二进制文件移动到工作目录:**
- **3****)、创建** **token** **文件,并记录生成的** **id** **号**
- **4****)、创建** **apiserver** **配置文件:**
- **5****)、****systemd** **管理** **apiserver****:**
- **6****)、将证书文件复制到工作目录:**
- **7****)、启动** **kube-apiserver****,并设置开启自启动****;**
- **4****、部署** **schedule** **组件:**
- **1****)、创建** **schedule** **配置文件:**
- **2****)、****systemd** **管理** **schduler** **组件:**
- **3****)、启动并设置开机自启**
- **5****、部署** **controller-manager** **组件:**
- **1****)、创建** **controller-manager** **配置文件:**
- **2****)、****systemd** **管理** **controller-manager** **组件:**
- **3****)、启动并设置开机自启**
- **4****)、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:**
- 五、在 node 节点部署组件:
- **1****、将** **kubelet-bootstrap** **用户绑定到系统集群角色**
- **2****、创建 创建****kubeconfig** **文件**
- 1)、创建 kubelet、bootstrapping、kubeconfig
- 2)、设置集群参数
- 3)、设置客户端认证参数
- 4)、设置上下文参数
- 5)、设置默认上下文
- 6)、创建 kube-proxy kubeconfig 文件
- 7)
- 8)
- 9)
- **10****)、将** **bootstrap.kubeconfig kube-proxy.kubeconfig** **这两个文件拷贝到****Node****节点****/opt/kubernetes/cfg****目录下。**
- **3****、部署** **kubelet** **组件**
- **1****)、将前面下载的二进制包中的** **kubelet** **和** **kube-proxy** **拷贝到** **node****节点****/****opt/kubernetes/bin** **目录下。**
- **2****)、创建** **kubelet** **配置文件:**
- **4****)、****systemd** **管理** **kubelet** **组件:**
- **5****)、启动并设置开启自启:**
- **6****)、配置** **node2** **,跟** **node1** **是一样的操作**
- **7****)、在** **Master** **审批** **Node** **加入集群:**
- **4****、部署** **kube-proxy** **组件:**
- **1****)、创建** **kube-proxy** **配置文件:**
- **2****)、****systemd** **管理** **kube-proxy** **组件:**
- **3****)、启动并添加开机自启:**
- **4****)、配置** **node2** **,跟** **node1** **是一样的操作:**
- **创建** **kube-proxy** **配置文件:**
- **systemd** **管理** **kube-proxy** **组件:**
- **启动并添加开机自启:**
- 六、查看集群状态
- 七、运行一个测试示例:Nginx
- **1****、创建一个** **Nginx Web****,测试集群是否正常工作:**
- **2****、查看** **Pod****,****Service****:**
- **3****、验证:访问集群中部署的****Nginx****,打开浏览器输入:****http://192.168.73.71:38393**
角色 | IP | 组件 |
k8s-maste | 192.168.73.71 | kube-apiserver,kube-controller-manager,kube-scheduler,etcd |
k8s-node1 | 192.168.73.72 | kubelet,kube-proxy,docker,flannel,etcd |
k8s-node2 | 192.168.73.73 | kubelet,kube-proxy,docker,flannel,etcd |
基础环境:
关闭防火墙、关闭内核安全机制、更改主机名、编写本地 hosts 文件。
一、部署 Etcd 集群:
@k8s-master
开启路由转发:
[root@k8s-master ~]# vim /etc/sysctl.d/99-sysctl.conf
net.ipv4.ip_forward = 1
[root@k8s-master ~]# sysctl -p
1**、生成证书:**
1**)、使用cfssl来生成自签证书,先下载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
[root@k8s-master ~]# wget https://pkg.cfssl.org/R1.2/cfssl_linux-amd64
[root@k8s-master ~]# wget https://pkg.cfssl.org/R1.2/cfssljson_linux-amd64
[root@k8s-master ~]# wget https://pkg.cfssl.org/R1.2/cfssl-certinfo_linux-amd64
[root@k8s-master ~]# chmod +x cfssl_linux-amd64 cfssljson_linux-amd64 cfssl-certinfo_linux-amd64
[root@k8s-master ~]# ls ## 查看是否添加了可执行权限
[root@k8s-master ~]# mv cfssl_linux-amd64 /usr/local/bin/cfssl
[root@k8s-master ~]# mv cfssljson_linux-amd64 /usr/local/bin/cfssljson
[root@k8s-master ~]# mv cfssl-certinfo_linux-amd64 /usr/bin/cfssl-certinfo
2**)、新建一个目录,用来存放生成** etcd 证书的文件,并在其目录下创建文件:
[root@k8s-master ~]# mkdir /root/ssl
[root@k8s-master ~]# cd ssl/
[root@k8s-master ssl]# vim ca-config.json
---------------------------------------------
{
"signing": {
"default": {
"expiry": "87600h"
},
"profiles": {
"www": {
"expiry": "87600h",
"usages": [
"signing",
"key encipherment",
"server auth",
"client auth"
]
}
}
}
}
---------------------------------------------
[root@k8s-master ssl]# vim ca-csr.json
\---------------------------------------------
{
"CN": "etcd CA",
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"L": "Beijing",
"ST": "Beijing"
}
]
}
\---------------------------------------------
[root@k8s-master ssl]# vim server-csr.json
\---------------------------------------------
其中hosts可将IP设置为127.0.0.1通用,客户端IP,下方为绝对集群IP值
{
"CN": "etcd",
"hosts": [
"192.168.73.71",
"192.168.73.72",
"192.168.73.73"
],
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"L": "BeiJing",
"ST": "BeiJing"
}
]
}
\---------------------------------------------
3**)、生成证书,并查看**
[root@k8s-master ssl]# cfssl gencert -initca ca-csr.json | cfssljson -bare ca -
[root@k8s-master ssl]# cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=www server-csr.json | cfssljson -bare server
[root@k8s-master ssl]# ls *pem
[root@k8s-master ssl]# cd
2**、部署** Etcd
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:
@ | k8s-master | k8s-node1 | k8s-node2 |
下载包 etcd-v3.2.12-linux-amd64.tar.gz 到虚拟机
1**)、创建** etcd 工作目录,解压二进制包,并将需要的包移动到 etcd 工作目录
[root@k8s-master ~]# mkdir /opt/etcd/{bin,cfg,ssl} -p
[root@k8s-master ~]# tar zxvf etcd-v3.2.12-linux-amd64.tar.gz
[root@k8s-master ~]# mv etcd-v3.2.12-linux-amd64/{etcd,etcdctl} /opt/etcd/bin/
[root@k8s-master ~]# ls /opt/etcd/bin
2**)、创建** etcd 配置文件
[root@k8s-master ~]# vim /opt/etcd/cfg/etcd
\---------------------------------------------
\#[Member]
ETCD_NAME="etcd01"
ETCD_DATA_DIR="/var/lib/etcd/default.etcd"
ETCD_LISTEN_PEER_URLS="https://192.168.73.71:2380"
ETCD_LISTEN_CLIENT_URLS="https://192.168.73.71:2379"
#[Clustering]
ETCD_INITIAL_ADVERTISE_PEER_URLS="https://192.168.73.71:2380"
ETCD_ADVERTISE_CLIENT_URLS="https://192.168.73.71:2379"
ETCD_INITIAL_CLUSTER="etcd01=https://192.168.73.71:2380,etcd02=https://192.168.73.72:2380,etcd03=https://192.168.73.73:2380"
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"
ETCD_INITIAL_CLUSTER_STATE="new"
\-------------------------
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
\---------------------------------------------
3**)、加入系统服务:**systemd 管理 etcd
[root@k8s-master ~]# 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=/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-failur
LimitNOFILE=65536
[Install]
WantedBy=multi-user.target
---------------------------------------------
4**)将刚才生成的证书拷贝到配置文件中的位置:**
[root@k8s-master ~]# cd ssl
[root@k8s-master ssl]# ls
[root@k8s-master ssl]# cp *.pem /opt/etcd/ssl
[root@k8s-master ssl]# cd /opt/etcd/ssl/
[root@k8s-master ssl]# ls
5**)启动并设置开机自启:**
systemctl daemon-reload
systemctl start etcd.service
systemctl enable etcd
systemctl status etcd.service
注意:因为只有 master,所以在此时是启动不成功的,所以先结束掉
二、在两个 node 节点上安装 Docker 及 etcd
@ | k8s-node1 | k8s-node2 |
1**、各** node 节点安装 docker
1**)、安装最新版本的** Docker 依赖环境
yum -y install yum-utils
yum-config-manager --add-repo https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
2**)、安装** Docker 并设置为开机自启动
yum -y install docker
systemctl start docker
systemctl enable docker
3**)、通过查看** Docker 版本查看 Docker 服务,并确保两个 docker 版本一致
docker version
4**)、因为** docker 默认是从国外网站拉取镜像,如果网速慢,可以添加加速站点,然后重启 docker
vim /etc/docker/damon.json
---------------------------------------------
{
"registry-mirrors": ["https://ung2thfc.mirror.aliyuncs.com"]
}
\---------------------------------------------
systemctl restart docker
2**、各** node 节点安装 etcd
1**)、创建工作目录:**
[root@k8s-node1 ~]# mkdir /opt/etcd/{bin,cfg,ssl} -p
[root@k8s-node1 ~]# tar zxvf etcd-v3.2.12-linux-amd64.tar.gz
[root@k8s-node1 ~]# mv etcd-v3.2.12-linux-amd64/{etcd,etcdctl} /opt/etcd/bin/
[root@k8s-node1 ~]# ls /opt/etcd/bin
2**)、在** master 节点将各 node 需要的文件远程复制过去
@ k8s-master
a**)**etcd 配置文件
[root@k8s-master ~]# scp /opt/etcd/cfg/etcd root@192.168.73.72:/opt/etcd/cfg/etcd
[root@k8s-master ~]# scp /opt/etcd/cfg/etcd root@192.168.73.73:/opt/etcd/cfg/etcd
b**)****系统服务:**systemd 管理 etcd
[root@k8s-master ~]# scp /usr/lib/systemd/system/etcd.service root@192.168.73.72:/usr/lib/systemd/system/etcd.service
[root@k8s-master ~]# scp /usr/lib/systemd/system/etcd.service root@192.168.73.73:/usr/lib/systemd/system/etcd.service
c**)**Etcd 生成的证书
[root@k8s-master ~]# scp /opt/etcd/ssl/* root@192.168.73.72:/opt/etcd/ssl/
[root@k8s-master ~]# scp /opt/etcd/ssl/* root@192.168.73.73:/opt/etcd/ssl/
3**)、在各** node 节点修改配置文件
@k8s-node1
[root@k8s-node1 ~]# vim /opt/etcd/cfg/etcd
---------------------------------------------
#[Member]
ETCD_NAME="etcd02"
ETCD_DATA_DIR="/var/lib/etcd/default.etcd"
ETCD_LISTEN_PEER_URLS="https://192.168.73.72:2380"
ETCD_LISTEN_CLIENT_URLS="https://192.168.73.72:2379"
#[Clustering]
ETCD_INITIAL_ADVERTISE_PEER_URLS="https://192.168.73.72:2380"
ETCD_ADVERTISE_CLIENT_URLS="https://192.168.73.72:2379"
ETCD_INITIAL_CLUSTER="etcd01=https://192.168.73.71:2380,etcd02=https://192.168.73.72:2380,etcd03=https://192.168.73.73:2380"
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"
ETCD_INITIAL_CLUSTER_STATE="new"
---------------------------------------------
启动并设置开机自启:然后查看运行状态
systemctl daemon-reload
systemctl start etcd.service
systemctl enable etcd
systemctl status etcd.service
k8s-node2
[root@k8s-node2 ~]# vim /opt/etcd/cfg/etcd
---------------------------------------------
#[Member]
ETCD_NAME="etcd03"
ETCD_DATA_DIR="/var/lib/etcd/default.etcd"
ETCD_LISTEN_PEER_URLS="https://192.168.73.73:2380"
ETCD_LISTEN_CLIENT_URLS="https://192.168.73.73:2379"
#[Clustering]
ETCD_INITIAL_ADVERTISE_PEER_URLS="https://192.168.73.73:2380"
ETCD_ADVERTISE_CLIENT_URLS="https://192.168.73.73:2379"
ETCD_INITIAL_CLUSTER="etcd01=https://192.168.73.71:2380,etcd02=https://192.168.73.72:2380,etcd03=https://192.168.73.73:2380"
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"
ETCD_INITIAL_CLUSTER_STATE="new"
---------------------------------------------
启动并设置开机自启:然后查看运行状态
systemctl daemon-reload
systemctl start etcd.service
systemctl enable etcd
systemctl status etcd.service
3**、在各节点全部部署完成后,启动各节点** etcd 服务,并检查 etcd 集群状态:
@ | k8s-master |
[root@k8s-master ~]# systemctl start etcd
[root@k8s-master ~]# systemctl status etcd
[root@k8s-master ~]# cd /opt/etcd/ssl/
[root@k8s-master ssl]#/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://192.168.73.71:2379,https://192.168.73.72:2379,https://192.168.73.73:2379" cluster-health
---------------------------------------------
member 350160273f5f96c4 is healthy: got healthy result from https://192.168.73.72:2379
member 38eaefc54f18a232 is healthy: got healthy result from https://192.168.73.73:2379
member a8796da733cd7114 is healthy: got healthy result from https://192.168.73.71:2379
cluster is healthy
---------------------------------------------
三、部署 Flannel 网络
1**、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:**
@ | k8s-master |
[root@k8s-master ssl]# /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://192.168.73.71:2379,https://192.168.73.72:2379,https://192.168.73.73:2379" set /coreos.com/network/config '{ "Network": "172.17.0.0/16", "Backend": {"Type": "vxlan"}}'
2**、在各** node 节点部署 Flannel 网络
@ | k8s-node1 | k8s-node2 |
1**)、首先将** flannel-v0.10.0-linux-amd64.tar.gz 包下载或移动到虚拟机:
wget https://github.com/coreos/flannel/releases/download/v0.10.0/flannel-v0.10.0-linux-amd64.tar.gz
wget https://github.com/coreos/flannel/releases/download/v0.11.0/flannel-v0.11.0-linux-amd64.tar.gz
2**)、解压缩并创建工作目录,将解压缩后需要的二进制文件移动到工作目录**
[root@k8s-node1 ~]# tar zxvf flannel-v0.10.0-linux-amd64.tar.gz
[root@k8s-node1 ~]# mkdir -p /opt/kubernetes/{bin,ssl,cfg}
[root@k8s-node1 ~]# mv flanneld mk-docker-opts.sh /opt/kubernetes/bin
3**)、在各** node 节点配置 Flannel**,systemd 管理 Flannel、配置** Docker 启动指定子网段
@ | k8s-node1 |
a**)**配置 Flannel
[root@k8s-node1 ~]# vim /opt/kubernetes/cfg/flanneld
---------------------------------------------
FLANNEL_OPTIONS="--etcd-endpoints=https://192.168.73.71:2379,https://192.168.73.72:2379,https://192.168.73.73:2379 -etcd-cafile=/opt/etcd/ssl/ca.pem -etcd-certfile=/opt/etcd/ssl/server.pem -etcd-keyfile=/opt/etcd/ssl/server-key.pem"
---------------------------------------------
b**)systemd** 管理 Flannel
[root@k8s-node1 ~]# 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=/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
---------------------------------------------
c**)配置** Docker 启动指定子网段
[root@k8s-node1 ~]# cp /usr/lib/systemd/system/docker.service /usr/lib/systemd/system/docker.service.bak
[root@k8s-node1 ~]# vim /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
---------------------------------------------
d**)重启** node1 上的 flannel 和 docker**,并检查是否生效:**
[root@k8s-node1 ~]# systemctl daemon-reload
[root@k8s-node1 ~]# systemctl start flanneld.service
[root@k8s-node1 ~]# systemctl enable flanneld.service
[root@k8s-node1 ~]# systemctl status flanneld.service
[root@k8s-node1 ~]# systemctl restart docker
[root@k8s-node1 ~]# ps -ef |grep docker
[root@k8s-node1 ~]# ip a
[root@node1 k8s]# ifconfig docker
docker0: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500
inet 172.17.58.1 netmask 255.255.255.0 broadcast 172.17.58.255
ether 02:42:2f:c5:af:c1 txqueuelen 0 (Ethernet)
4**)将** node2 上需要的文件远程复制过去
配置 Flannel****文件
[root@k8s-node1 ~]# scp -r /opt/kubernetes/cfg/flanneld root@k8s-node2:/opt/kubernetes/cfg/
s****ystemd 管理 Flannel
[root@k8s-node1 ~]# scp -r /usr/lib/systemd/system/flanneld.service root@k8s-node2:/usr/lib/systemd/system/flanneld.service
配置 Docker 启动指定子网段
[root@k8s-node1 ~]# scp -r /usr/lib/systemd/system/docker.service root@k8s-node2:/usr/lib/systemd/system/
5**)重启** node2 上的 flannel 和 docker**,并检查是否生效,然后使用** ping 命令,测试两台 docker 的连通性
@ | k8s-node2 |
[root@k8s-node2 ~]# systemctl daemon-reload
[root@k8s-node2 ~]# systemctl start flanneld.service
[root@k8s-node2 ~]# systemctl enable flanneld.service
[root@k8s-node2 ~]# systemctl status flanneld.service
[root@k8s-node2 ~]# systemctl restart docker
[root@k8s-node2 ~]# ps -ef |grep docker
[root@node2 k8s]# ifconfig docker
docker0: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500
inet 172.17.89.1 netmask 255.255.255.0 broadcast 172.17.89.255
6**)确保docker0与flannel.1在同一网段。**
测试不同节点互通,在当前节点访问另一个Node节点docker0 IP:
[root@k8s-node2 ~]# ip a
[root@k8s-node2 ~]# ping 172.17.58.1
ping node1上面 docker0 的 ip,查看是否能互通
四、在 master 节点上部署组件:
@ | k8s-master |
1**、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。**
检查各节点(master+node)服务是否正常运行:
[root@k8s-master ssl]# /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://192.168.73.71:2379,https://192.168.73.72:2379,https://192.168.73.73:2379" cluster-health
[root@k8s-node1 ~]# systemctl status etcd
[root@k8s-node1 ~]# systemctl status flanneld.service
[root@k8s-node1 ~]# systemctl status docker
2**、生成证书:**
1**)、创建存放证书的目录**
[root@k8s-master ~]# mkdir k8s
[root@k8s-master ~]# cd k8s/
2)、创建生成证书的文件
[root@k8s-master k8s]# vim ca-config.json
---------------------------------------------
{
"signing": {
"default": {
"expiry": "87600h"
},
"profiles": {
"kubernetes": {
"expiry": "87600h",
"usages": [
"signing",
"key encipherment",
"server auth",
"client auth"
]
}
}
}
}
---------------------------------------------
[root@k8s-master k8s]# vim ca-csr.json
---------------------------------------------
{
"CN": "kubernetes",
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"L": "Beijing",
"ST": "Beijing",
"O": "k8s",
"OU": "System"
}
]
}
---------------------------------------------
[root@k8s-master k8s]# vim server-csr.json
---------------------------------------------
{
"CN": "kubernetes",
"hosts": [
"10.0.0.1",
"127.0.0.1",
"192.168.73.71",
"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"
}
]
}
---------------------------------------------
[root@k8s-master k8s]# vim 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"
}
]
}
---------------------------------------------
3**)、生成证书**
a**、生成** ca 证书:
[root@k8s-master k8s]# cfssl gencert -initca ca-csr.json | cfssljson -bare ca -
b**、生成** apiserver 证书:
[root@k8s-master k8s]# cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=kubernetes server-csr.json | cfssljson -bare server
c**、生成** kube-proxy 证书:
[root@k8s-master 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
d**、查看生成证书文件:(一共** 6 个)
[root@k8s-master k8s]# ls *.pem
ca-key.pem ca.pem kube-proxy-key.pem kube-proxy.pem server-key.pem server.pem
3**、部署** apiserver 组件:
1**)、把** kubernetes-server-linux-amd64.tar.gz 包传到虚拟机,kubernetes-server-linux-amd64.tar.gz,包含了所需的所有组件。
各个版本的https://kubernetes.io/zh/docs/setup/release/notes/
wget https://dl.k8s.io/v1.18.0/kubernetes-server-linux-amd64.tar.gz
2**)、创建工作目录,解压缩包,并将需要的二进制文件移动到工作目录:**
[root@k8s-master ~]# mkdir /opt/kubernetes/{bin,cfg,ssl} -p
[root@k8s-master ~]# tar zxvf kubernetes-server-linux-amd64.tar.gz
[root@k8s-master ~]# cd kubernetes/server/bin
[root@k8s-master bin]# cp kube-apiserver kube-scheduler kube-controller-manager kubectl /opt/kubernetes/bin/
[root@k8s-master bin]# cd
[root@k8s-master ~]# ls /opt/kubernetes/bin/
3**)、创建** token 文件,并记录生成的 id 号
[root@k8s-master ~]# export BOOTSTRAP_TOKEN=$(head -c 16 /dev/urandom | od -An -t x | tr -d ' ')
[root@k8s-master ~]# echo $BOOTSTRAP_TOKEN
9465881e2449a5427cf4b2da9e9da2ef
[root@k8s-master ~]# vim /opt/kubernetes/cfg/token.csv
9465881e2449a5427cf4b2da9e9da2ef,kubelet-bootstrap,10001,"system:kubelet-bootstrap"
-----------------------------------
此为注释:不需要写进配置文件
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
-----------------------------------
4**)、创建** apiserver 配置文件:
[root@k8s-master ~]# vim /opt/kubernetes/cfg/kube-apiserver
---------------------------------------------
KUBE_APISERVER_OPTS="--logtostderr=true \
--v=4 \
--etcd-servers=https://192.168.73.71:2379,https://192.168.73.72:2379,https://192.168.73.73:2379 \
--bind-address=192.168.73.71 \
--secure-port=6443 \
--advertise-address=192.168.73.71 \
--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"
--------------------------------------------------------
KUBE_APISERVER_OPTS="--logtostderr=true \
--v=4 \
--etcd-servers=https://192.168.73.71:2379,https://192.168.73.72:2379,https://192.168.73.73:2379 \
--bind-address=192.168.73.71 \
--secure-port=6443 \
--advertise-address=192.168.73.71 \
--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"
-----------------------
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
\---------------------------------------------
5**)、systemd 管理 apiserver:**
[root@k8s-master ~]# 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
**[Install]**
WantedBy=multi-user.target
---------------------------------------------
6**)、将证书文件复制到工作目录:**
[root@k8s-master ~]# cp k8s/*.pem /opt/kubernetes/ssl/
[root@k8s-master ~]# ls /opt/kubernetes/ssl/
7**)、启动** kube-apiserver**,并设置开启自启动****;**
[root@k8s-master ~]# systemctl daemon-reload
[root@k8s-master ~]# systemctl enable kube-apiserver
[root@k8s-master ~]# systemctl restart kube-apiserver
[root@k8s-master ~]# systemctl status kube-apiserver.service
4**、部署** schedule 组件:
1**)、创建** schedule 配置文件:
[root@k8s-master ~]# vim /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)
---------------------------------------------
2**)、**systemd 管理 schduler 组件:
[root@k8s-master ~]# 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
**[Install]**
WantedBy=multi-user.target
---------------------------------------------
3**)、启动并设置开机自启**
systemctl daemon-reload
systemctl enable kube-scheduler.service
systemctl restart kube-scheduler.service
systemctl status kube-scheduler.service
5**、部署** controller-manager 组件:
1**)、创建** controller-manager 配置文件:
[root@k8s-master ~]# vim /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 \
--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"
---------------------------------------------
2**)、**systemd 管理 controller-manager 组件:
[root@k8s-master ~]# 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 $KUBE_CONTROLLER_MANAGER_OPTS
Restart=on-failure
**[Install]**
WantedBy=multi-user.ta
---------------------------------------------
3**)、启动并设置开机自启**
systemctl daemon-reload
systemctl enable kube-controller-manager
systemctl restart kube-controller-manager
systemctl status kube-controller-manager
4**)、所有组件都已经启动成功,通过** kubectl 工具查看当前集群组件状态:
[root@k8s-master ~]# /opt/kubernetes/bin/kubectl get cs
NAME | STATUS | MESSAGE | ERROR |
Scheduler | Healthy | Ok | |
controller-manager | Healthy | Ok | |
etcd-0 | Healthy | {“health”:“true”} | |
etcd-1 | Healthy | {“health”:“true”} | |
etcd-2 | Healthy | {“health”:“true”} |
五、在 node 节点部署组件:
Master apiserver启用TLS认证后,Node节点kubelet组件 想要加入集群,必须使用CA签发的有效证书才能与apiserver通信,当Node节点 很多时,签署证书是一件很繁琐的事情,因此有了TLS Bootstrapping机制,kubelet会以一个低权限用户自动向apiserver申请证书,kubelet的证书由apiserver动态签署。
认证大致工作流程如图所示:
@ | k8s-master |
1**、将** kubelet-bootstrap 用户绑定到系统集群角色
[root@k8s-master ~]#
/opt/kubernetes/bin/kubectl **create** clusterrolebinding kubelet-bootstrap \
*--clusterrole=system:node-bootstrapper \*
*--user=kubelet-bootstrap
2**、创建 创建****kubeconfig** 文件
在生成kubernetes证书的目录下执行以下命令生成kubeconfig文件:
1)、创建 kubelet、bootstrapping、kubeconfig
[root@master k-ssl]# cat /opt/kubernetes/cfg/token.csv
b6036f0c394f940686b7b7ee444b7d4b,kubelet-bootstrap,10001,"system:kubelet-bootstrap"
[root@master k-ssl]# BOOTSTRAP_TOKEN=b6036f0c394f940686b7b7ee444b7d4b
[root@k8s-master ~]# KUBE_APISERVER="https://192.168.73.71:6443"
2)、设置集群参数
[root@k8s-master ~]#/opt/kubernetes/bin/kubectl config **set**-cluster kubernetes --certificate-authority=./ca.pem --embed-certs=true --server=${KUBE_APISERVER} --kubeconfig=bootstrap.kubeconfig
3)、设置客户端认证参数
[root@k8s-master ~]#/opt/kubernetes/bin/kubectl config **set**-credentials kubelet-bootstrap --token=${BOOTSTRAP_TOKEN} --kubeconfig=bootstrap.kubeconfig
4)、设置上下文参数
[root@k8s-master ~]#/opt/kubernetes/bin/kubectl config **set**-context **default** --cluster=kubernetes --user=kubelet-bootstrap --kubeconfig=bootstrap.kubeconfig
5)、设置默认上下文
[root@k8s-master ~]# /opt/kubernetes/bin/kubectl config use-context default --kubeconfig=bootstrap.kubeconfig
6)、创建 kube-proxy kubeconfig 文件
[root@k8s-master ~]# /opt/kubernetes/bin/kubectl config **set**-cluster kubernetes --certificate-authority=./ca.pem --embed-certs=true --server=${KUBE_APISERVER} --kubeconfig=kube-proxy.kubeconfig
7)
[root@k8s-master ~]# /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
8)
[root@k8s-master ~]# /opt/kubernetes/bin/kubectl config **set**-context **default** --cluster=kubernetes --user=kube-proxy --kubeconfig=kube-proxy.kubeconfig
9)
[root@k8s-master ~]# /opt/kubernetes/bin/kubectl config use-context **default** --kubeconfig=kube-proxy.kubeconfig
[root@k8s-master ~]# ls # 查看是否生成 bootstrap.kubeconfig kube-proxy.kubeconfig 这两个文件
10**)、将** bootstrap.kubeconfig kube-proxy.kubeconfig 这两个文件拷贝到Node节点**/opt/kubernetes/cfg****目录下。**
[root@k8s-master ~]# scp ./*.kubeconfig root@k8s-node1:/opt/kubernetes/cfg
[root@k8s-master ~]# scp ./*.kubeconfig root@k8s-node2:/opt/kubernetes/cfg
3**、部署** kubelet 组件
1**)、将前面下载的二进制包中的** kubelet 和 kube-proxy 拷贝到 **node节点/**opt/kubernetes/bin 目录下。
[root@k8s-master ~]# cd /root/kubernetes/server/bin/
[root@k8s-master bin]# scp kubelet kube-proxy root@k8s-node1:/opt/kubernetes/bin/
[root@k8s-master bin]# scp kubelet kube-proxy root@k8s-node2:/opt/kubernetes/bin/
@ | k8s-node1 | k8s-node2 |
2**)、创建** kubelet 配置文件:
[root@k8s-node1 ~]# vim /opt/kubernetes/cfg/kubelet
---------------------------------------------
KUBELET_OPTS="--logtostderr=true \
--v=4 \
--hostname-override=192.168.73.72 \
--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
---------------------------------------------
3**)、创建** kubelet.config 配置文件如下:
[root@k8s-node1 ~]# vim /opt/kubernetes/cfg/kubelet.config
---------------------------------------------
**kind: KubeletConfiguration**
**apiVersion: kubelet.config.k8s.io/v1beta1**
**address: 192.168.****73.72**
**port: 10250**
**readOnlyPort: 10255**
**cgroupDriver: cgroupfs**
**clusterDNS: ["10.0.0.2"]**
**clusterDomain: cluster.local.**
**failSwapOn: false**
**authentication:**
anonymous:
enabled: true
---------------------------------------------
4**)、**systemd 管理 kubelet 组件:
[root@k8s-node1 ~]# 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
---------------------------------------------
5**)、启动并设置开启自启:**
[root@k8s-node1 ~]# systemctl daemon-reload
[root@k8s-node1 ~]# systemctl enable kubelet
[root@k8s-node1 ~]# systemctl restart kubelet
[root@k8s-node1 ~]# systemctl status kubelet
6**)、配置** node2 ,跟 node1 是一样的操作
**创建** **kubelet** **配置文件:**
[root@k8s-node2 ~]# vim /opt/kubernetes/cfg/kubelet
---------------------------------------------
KUBELET_OPTS="--logtostderr=true \
--v=4 \
--hostname-override=192.168.73.73 \
--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"
---------------------------------------------
**创建** **kubelet.config** **配置文件如下:**
[root@k8s-node2 ~]# vim /opt/kubernetes/cfg/kubelet.config
---------------------------------------------
**kind: KubeletConfiguration**
**apiVersion: kubelet.config.k8s.io/v1beta1**
**address: 192.168.****73.73**
**port: 10250**
**readOnlyPort: 10255**
**cgroupDriver: cgroupfs**
**clusterDNS: ["10.0.0.2"]**
**clusterDomain: cluster.local.**
**failSwapOn: false**
**authentication:**
anonymous:
enabled: true
---------------------------------------------
**systemd** **管理** **kubelet** **组件:**
[root@k8s-node2 ~]# 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
---------------------------------------------
systemctl daemon-reload
systemctl enable kubelet
systemctl restart kubelet
systemctl status kubelet
7**)、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:
@ | k8s-master |
查看为添加的节点
[root@k8s-master ~]# /opt/kubernetes/bin/kubectl get csr
NAME | AGE | REQUESTOR | CONDITION |
node-csr-Bj4m02iAVLfY4lsLMDFGBfG1sfgPBnHTOAneF5DH1cA | 116s | kubelet-bootstrap | Pending |
添加节点**
[root@k8s-master ~]# /opt/kubernetes/bin/kubectl certificate approve node-csr-Bj4m02iAVLfY4lsLMDFGBfG1sfgPBnHTOAneF5DH1cA
[root@k8s-master ~]# /opt/kubernetes/bin/kubectl certificate approve node-csr-fhLxPnTrXwEYak7Lf2r_aB0780ZZ_b-CnwCdo1g0_n0
**查看已添加的节点**
[root@k8s-master ~]# /opt/kubernetes/bin/kubectl get node
4**、部署** kube-proxy 组件:
@ | k8s-node1 |
1**)、创建** kube-proxy 配置文件:
[root@k8s-node1 ~]# vim /opt/kubernetes/cfg/kube-proxy
---------------------------------------------
KUBE_PROXY_OPTS="--logtostderr=true \
--v=4 \
--hostname-override=192.168.73.72 \
--cluster-cidr=10.0.0.0/24 \
--kubeconfig=/opt/kubernetes/cfg/kube-proxy.kubeconfig"
---------------------------------------------
2**)、**systemd 管理 kube-proxy 组件:
[root@k8s-node1 ~]# vim /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
---------------------------------------------
3**)、启动并添加开机自启:**
[root@k8s-node1 ~]# systemctl daemon-reload
[root@k8s-node1 ~]# systemctl enable kube-proxy
[root@k8s-node1 ~]# systemctl restart kube-proxy
[root@k8s-node1 ~]# systemctl status kube-proxy.service
4**)、配置** node2 ,跟 node1 是一样的操作:
@ | k8s-node2 |
创建 kube-proxy 配置文件:
[root@k8s-node2 ~]# vim /opt/kubernetes/cfg/kube-proxy
---------------------------------------------
KUBE_PROXY_OPTS="--logtostderr=true \
--v=4 \
--hostname-override=192.168.73.73 \
--cluster-cidr=10.0.0.0/24 \
--kubeconfig=/opt/kubernetes/cfg/kube-proxy.kubeconfig"
---------------------------------------------
systemd 管理 kube-proxy 组件:
root@k8s-node2 ~]# vim /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
---------------------------------------------
启动并添加开机自启:
systemctl daemon-reload
systemctl enable kube-proxy
systemctl restart kube-proxy
systemctl status kube-proxy.service
六、查看集群状态
@ | k8s-master |
[root@k8s-master ~]# /opt/kubernetes/bin/kubectl get node
[root@k8s-master ~]# /opt/kubernetes/bin/kubectl get cs
七、运行一个测试示例:Nginx
1**、创建一个** Nginx Web**,测试集群是否正常工作:**
[root@k8s-master ~]# /opt/kubernetes/bin/kubectl run nginx --image=nginx --replicas=3
[root@k8s-master ~]# /opt/kubernetes/bin/kubectl expose deployment nginx --port=80 --target-port=80 --type=NodePort
2**、查看** Pod**,Service:**
[root@k8s-master ~]# /opt/kubernetes/bin/kubectl get pods
[root@k8s-master ~]# /opt/kubernetes/bin/kubectl get svc
3**、验证:访问集群中部署的Nginx,打开浏览器输入:**http://192.168.73.71:38393
提醒:
若嫌 执行命令输入比较麻烦,可以使用软连接:
[root@k8s-master ~]# ln -i /opt/kubernetes/bin/* /usr/local/bin/
[root@k8s-master ~]# vim /etc/docker/damon.json
{
"registry-mirrors": ["https://ung2thfc.mirror.aliyuncs.com","https://u9nigs6v.mirror.aliynucs.com","https://docker.mirros.ustc.edu.cn","https://dockerhub.azk8s.cn","https://registry.docker-cn.com"]
}
vim /etc/docker/daemon.json
{
"registry-mirrors" : ["https://7efasetw.mirror.aliyuncs.com"]
}
systemctl daemon-reload
systemctl restart docker