Kubernetes单节点部署二进制k8s群集
Kubernetes单节点部署二进制k8s群集
Kubernetes单节点部署二进制k8s群集
#环境
| master | 192.168.100.170 | kube-apiserver、kube-scheduler、controller-manager、etcd | 2G+4CPU |
| node1 | 192.168.100.180 | kube-apiserver、kube-scheduler、controller-manager、etcd | 2G+4CPU |
| node2 | 192.168.100.190 | kube-apiserver、kube-scheduler、controller-manager、etcd | 2G+4CPU |
| etcd | ca.pem，server.pem，server-key.pem |
| flannel | ca.pem，server.pem，server-key.pem |
| kube-apiserver | ca.pem，server.pem，server-key.pem |
| kubelet | ca.pem，ca-key.pem |
| kube-proxy | ca.pem，kube-proxy.pem,kube-proxy-key.pem |
| kubectl | ca.pem，admin-pem，admin-key.pem |
一: Etcd群集部署---------------------------------------------------------
hostnamectl set-hostaname master
hostnamectl set-hostaname node1
hostnamectl set-hostaname node2
iptables -F
setenforce 0
//master部署------------------------------
1.master主机创建k8s文件夹并上传etcd脚本，下载cffssl官方证书生成工具
mkdir k8s && cd k8s
//上传脚本etcd-cert.sh etcd.sh
ls
etcd-cert.sh etcd.sh
2.下载证书制作工具
k8s]# vim cfssl.sh
curl -L -o /usr/local/bin/cfssl
curl -L -o /usr/local/bin/cfssljson
curl -L -o /usr/local/bin/cfssl-certinfo
chmod +x /usr/local/bin/cfssl /usr/local/bin/cfssljson /usr/local/bin/cfssl-certinfo
bash cfssl.sh
ls /usr/local/bin/
cfssl cfssl-certinfo cfssljson
3.开始制作证书
#cfssl 生成证书工具 cfssljson通过传入json文件生成证书 cfssl-certinfo查看证书信息
#定义ca证书
k8s]# cd etcd-cert
[root@master etcd-cert]# cat > ca-config.json < ca-csr.json < server-csr.json < flannel.sh </opt/kubernetes/cfg/flanneld
FLANNEL_OPTIONS="--etcd-endpoints=${ETCD_ENDPOINTS} \
-etcd-cafile=/opt/etcd/ssl/ca.pem \
-etcd-certfile=/opt/etcd/ssl/server.pem \
-etcd-keyfile=/opt/etcd/ssl/server-key.pem"
EOF
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
EOF
systemctl daemon-reload
systemctl enable flanneld
systemctl restart flanneld
EOF
3.开启flannel网络功能
[root@node1 ~]# bash flannel.sh https://192.168.100.170:2379,https://192.168.100.170:2379,https://192.168.100.180:2379
4.配置docker连接flannel
[root@node1 ~]# bash flannel.sh https://192.168.100.170:2379,https://192.168.100.180:2379,https://192.168.100.190:2379
Created symlink from /etc/systemd/system/multi-user.target.wants/flanneld.service to /usr/lib/systemd/system/flanneld.service.
5.配置docker连接flannel
[root@node1 ~]# vim /usr/lib/systemd/system/docker.service
[Service]
Type=notify
# the default is not to use systemd for cgroups because the delegate issues still
# exists and systemd currently does not support the cgroup feature set required
# for containers run by docker
EnvironmentFile=/run/flannel/subnet.env "添加行"
ExecStart=/usr/bin/dockerd $DOCKER_NETWORK_OPTIONS -H fd:// --containerd=/run/containerd/containerd.sock "添加$DOCKER_NETWORK_OPTIONS"
ExecReload=/bin/kill -s HUP $MAINPID
TimeoutSec=0
RestartSec=2
Restart=always
[root@localhost ~]# cat /run/flannel/subnet.env
DOCKER_OPT_BIP="--bip=172.17.42.1/24"
DOCKER_OPT_IPMASQ="--ip-masq=false"
DOCKER_OPT_MTU="--mtu=1450"
//说明：bip指定启动时的子网
DOCKER_NETWORK_OPTIONS=" --bip=172.17.42.1/24 --ip-masq=false --mtu=1450"
6.重启docker服务
[root@node1 ~]# systemctl daemon-reload
[root@node1 ~]# systemctl restart docker
7.查看flannel网络
[root@node1 ~]# ifconfig
###node2
[root@node1 ~]# tar zxvf flannel-v0.10.0-linux-amd64.tar.gz
flanneld
mk-docker-opts.sh
README.md
1.创建k8s工作目录
[root@node1 ~]# mkdir /opt/kubernetes/{cfg,bin,ssl} -p
[root@node1 ~]# mv mk-docker-opts.sh flanneld /opt/kubernetes/bin/
2.编写服务脚本与
[root@node1 ~]# cat > flannel.sh </opt/kubernetes/cfg/flanneld
FLANNEL_OPTIONS="--etcd-endpoints=${ETCD_ENDPOINTS} \
-etcd-cafile=/opt/etcd/ssl/ca.pem \
-etcd-certfile=/opt/etcd/ssl/server.pem \
-etcd-keyfile=/opt/etcd/ssl/server-key.pem"
EOF
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
EOF
systemctl daemon-reload
systemctl enable flanneld
systemctl restart flanneld
EOF
3.开启flannel网络功能
[root@node1 ~]# bash flannel.sh https://192.168.100.170:2379,https://192.168.100.170:2379,https://192.168.100.180:2379
4.配置docker连接flannel
[root@node1 ~]# bash flannel.sh https://192.168.100.170:2379,https://192.168.100.180:2379,https://192.168.100.190:2379
Created symlink from /etc/systemd/system/multi-user.target.wants/flanneld.service to /usr/lib/systemd/system/flanneld.service.
5.配置docker连接flannel
[root@node1 ~]# vim /usr/lib/systemd/system/docker.service
[Service]
Type=notify
# the default is not to use systemd for cgroups because the delegate issues still
# exists and systemd currently does not support the cgroup feature set required
# for containers run by docker
EnvironmentFile=/run/flannel/subnet.env "添加行"
ExecStart=/usr/bin/dockerd $DOCKER_NETWORK_OPTIONS -H fd:// --containerd=/run/containerd/containerd.sock "添加$DOCKER_NETWORK_OPTIONS"
ExecReload=/bin/kill -s HUP $MAINPID
TimeoutSec=0
RestartSec=2
Restart=always
[root@localhost ~]# cat /run/flannel/subnet.env
DOCKER_OPT_BIP="--bip=172.17.42.1/24"
DOCKER_OPT_IPMASQ="--ip-masq=false"
DOCKER_OPT_MTU="--mtu=1450"
//说明：bip指定启动时的子网
DOCKER_NETWORK_OPTIONS=" --bip=172.17.42.1/24 --ip-masq=false --mtu=1450"
6.重启docker服务
[root@node1 ~]# systemctl daemon-reload
[root@node1 ~]# systemctl restart docker
7.查看flannel网络
[root@node2 ~]# ifconfig
#####测试ping通对方docker0网卡 证明flannel起到路由作用
[root@node1 ~]# docker run -it centos:7 /bin/bash
[root@5f9a65565b53 /]# yum install net-tools -y
[root@5f9a65565b53 /]# ifconfig
eth0: flags=4163 mtu 1450
inet 172.17.84.2 netmask 255.255.255.0 broadcast 172.17.84.255
ether 02:42:ac:11:54:02 txqueuelen 0 (Ethernet)
RX packets 18192 bytes 13930229 (13.2 MiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 6179 bytes 337037 (329.1 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
lo: flags=73 mtu 65536
inet 127.0.0.1 netmask 255.0.0.0
loop txqueuelen 1 (Local Loopback)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 0 bytes 0 (0.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
[root@node2 ~]# docker run -it centos:7 /bin/bash
[root@abbc159a6378 /]# yum install net-tools -y
[root@abbc159a6378 /]# ifconfig
eth0: flags=4163 mtu 1450
inet 172.17.36.2 netmask 255.255.255.0 broadcast 172.17.84.255
ether 02:42:ac:11:54:02 txqueuelen 0 (Ethernet)
RX packets 18192 bytes 13930229 (13.2 MiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 6179 bytes 337037 (329.1 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
#测试
[root@abbc159a6378 /]# ping 172.17.84.2
[root@5f9a65565b53 /]# ping 172.17.36.2
"容器相互能ping通就说明容器间能跨宿主机相互访问"
四: 部署master组件
//在master上操作，api-server生成证书
1、master节点操作，api-server生成证书
[root@localhost k8s]# unzip master.zip
[root@localhost k8s]# mkdir /opt/kubernetes/{cfg,bin,ssl} -p "创建配置文件目录,脚本目录,证书目录"
[root@localhost k8s]# mkdir k8s-cert
[root@localhost k8s]# cd k8s-cert/
[root@localhost k8s-cert]# ls "上传k8s-cert.sh到这里"
k8s-cert.sh
[root@master k8s-cert]# cat k8s-cert.sh
cat > ca-config.json < ca-csr.json < server-csr.json < admin-csr.json < kube-proxy-csr.json < 31s v1.12.3
#'//如果有一个节点noready，检查kubelet，如果很多节点noready，那就检查apiserver，如果没问题再检查VIP地址，keepalived'
#---------------------------node1节点操作,启动proxy服务
[root@node1 ~]# ls
anaconda-ks.cfg flannel-v0.10.0-linux-amd64.tar.gz node.zip
docker-install.sh initial-setup-ks.cfg proxy.sh
flannel.sh kubelet.sh README.md
[root@node1 ~]# bash proxy.sh 192.168.100.180
Created symlink from /etc/systemd/system/multi-user.target.wants/kube-proxy.service to /usr/lib/systemd/system/kube-proxy.service.
[root@node1 ~]# systemctl status kube-proxy.service
● kube-proxy.service - Kubernetes Proxy
Loaded: loaded (/usr/lib/systemd/system/kube-proxy.service; enabled; vendor preset: disabled)
Active: active (running) since 二 2020-09-29 12:04:50 CST; 9s ago
Main PID: 34171 (kube-proxy)
Tasks: 0
Memory: 8.2M
CGroup: /system.slice/kube-proxy.service
‣ 34171 /opt/kubernetes/bin/kube-proxy --logtostderr=true --v=4 -...
#部署node2
#----------------------------在node01节点操作
#把现成的/opt/kubernetes目录复制到其他node节点进行修改即可
[root@node1 ~]# scp -r /opt/kubernetes/ root@192.168.100.190:/opt/
#把kubelet，kube-proxy的service文件拷贝到node2中
[root@node1 ~]# scp /usr/lib/systemd/system/{kubelet,kube-proxy}.service root@192.168.100.190:/usr/lib/systemd/system/
root@192.168.100.190's 'password:
kubelet.service 100% 264 159.9KB/s 00:00
kube-proxy.service 100% 231 302.4KB/s 00:00
[root@node1 ~]# systemctl enable kubelet.service
#------------------------------node2操作
1、修改三个配置文件的IP地址
#首先删除复制过来的证书，等会node02会自行申请证书
[root@node2 ~]# cd kubeconfig/
[root@node2 kubeconfig]# cd /opt/kubernetes/ssl/
[root@node2 ssl]# ls
kubelet-client-2020-09-29-12-03-29.pem kubelet.crt
kubelet-client-current.pem kubelet.key
[root@node2 ssl]# rm -rf *
[root@node2 ssl]# ls
[root@node2 ssl]# cd ../cfg/
2、启动服务并查看状态
#修改配置文件kubelet kubelet.config kube-proxy（三个配置文件）
[root@node2 cfg]# vim kubelet
KUBELET_OPTS="--logtostderr=true \
--v=4 \
--hostname-override=192.168.100.190 \ "改成node2地址"
--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"
[root@node2 cfg]# vim kubelet.config
kind: KubeletConfiguration
apiVersion: kubelet.config.k8s.io/v1beta1
address: 192.168.100.190 "node2地址"
port: 10250
readOnlyPort: 10255
cgroupDriver: cgroupfs
clusterDNS:
- 10.0.0.2
clusterDomain: cluster.local.
failSwapOn: false
authentication:
anonymous:
enabled: true
[root@node2 cfg]# vim kube-proxy
KUBE_PROXY_OPTS="--logtostderr=true \
--v=4 \
--hostname-override=192.168.100.190 \ "node2的地址"
--cluster-cidr=10.0.0.0/24 \
--proxy-mode=ipvs \
--kubeconfig=/opt/kubernetes/cfg/kube-proxy.kubeconfig"
#启动服务
[root@node2 cfg]# systemctl start kubelet.service
[root@node2 cfg]# systemctl enable kubelet.service
Created symlink from /etc/systemd/system/multi-user.target.wants/kubelet.service to /usr/lib/systemd/system/kubelet.service.
[root@node2 cfg]# systemctl start kube-proxy.service
[root@node2 cfg]# systemctl enable kube-proxy.service
Created symlink from /etc/systemd/system/multi-user.target.wants/kube-proxy.service to /usr/lib/systemd/system/kube-proxy.service.
3.master上操作查看请求并同意node02证书
//在master上操作查看请求Pending
[root@master kubeconfig]# kubectl get csr
NAME AGE REQUESTOR CONDITION
node-csr-Q22FXrUtwbkKu5b0LQcMbbyXYMuCMkGKUyH0ME1x2ow 47s kubelet-bootstrap Pending
node-csr-lk45yzxFkiUhV8b36fmhmFsZdqtD8JUWV1Vkiq9w7Nw 12m kubelet-bootstrap Approved,Issued
[root@master kubeconfig]# kubectl get node
NAME STATUS ROLES AGE VERSION
192.168.100.180 Ready 6m26s v1.12.3
[root@master kubeconfig]# kubectl certificate approve node-csr-Q22FXrUtwbkKu5b0LQcMbbyXYMuCMkGKUyH0ME1x2ow "授权允许请求加入群集"
certificatesigningrequest.certificates.k8s.io/node-csr-Q22FXrUtwbkKu5b0LQcMbbyXYMuCMkGKUyH0ME1x2ow approved
"master查看群集中的节点"
[root@master kubeconfig]# kubectl get node
NAME STATUS ROLES AGE VERSION
192.168.100.180 Ready 8m52s v1.12.3
192.168.100.190 Ready 43s v1.12.3
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