Build k8s1.9.9 on centos7

#! /bin/bash

Manually install k8s1.9.9 on centos7 Reference#https://www.cnblogs.com/peterinblog/p/8124746.html

Binary software download address: https://github.com/coreos/etcd/releases #https://github.com/kubernetes/kubernetes/blob/master/CHANGELOG-1.9.md

https://github.com/coreos/etcd/releases

This time using master-worker, a master node and a worker node master: 192.168.29.102 #worker: 192.168.29.103

For the basic environment, such as configuring local yum, closing the firewall or opening related ports, SELINUX, these need to be prepared in advance.

Master uses root privileges, so I didn’t pay attention to permissions

etcd needs to use an odd number of nodes, because the leader must be promoted through election

1、 download file

mkdir /data && cd /data

wget https://github.com/coreos/etcd/releases/download/v3.3.9/etcd-v3.3.9-linux-amd64.tar.gz # master

wget https://dl.k8s.io/v1.9.9/kubernetes-server-linux-amd64.tar.gz #master

wget https://dl.k8s.io/v1.9.9/kubernetes-node-linux-amd64.tar.gz # worker

2、 Unzip etcd and move files

tar -zxvf etcd-v3.3.9-linux-amd64.tar.gz && etcd-v3.3.9-linux-amd64

mv etcd* /usr/bin

3、 etcd configuration file

mkdir /etc/etcd

cat <>/etc/etcd/etcd.conf

ETCD_NAME=ansible-k8s2

ETCD_LISTEN_CLIENT_URLS="http://0.0.0.0:2379"

ETCD_DATA_DIR="/var/lib/etcd/"

ETCD_ADVERTISE_CLIENT_URLS="http://192.168.29.102:2379"

EOF

4、 Unzip the k8s file and move the file to /usr/bin

tar -zxvf kubernetes-server-linux-amd64.tar.gz && cd kubernetes/server/bin/

mv kube-apiserver kube-controller-manager kube-scheduler kube-proxy kubelet kubectl /usr/bin

5、 k8s related configuration files

mkdir /etc/kubernetes && cd /etc/kubernetes

apiserver

cat <>apiserver

The following values are used to configure the kube-apiserver

The address on the local server to listen to.

KUBE_API_ADDRESS="--address=0.0.0.0"

KUBE_API_ADDRESS="--insecure-bind-address=0.0.0.0"

The port on the local server to listen on.

KUBE_API_PORT="--port=8080"

Port minions listen on

KUBELET_PORT="--kubelet-port=10250"

Comma separated list of nodes in the etcd cluster

KUBE_ETCD_SERVERS="--etcd-servers=http://192.168.29.102:2379"

Address range to use for services

KUBE_SERVICE_ADDRESSES="--service-cluster-ip-range=192.168.4.0/24"

default admission control policies

KUBE_ADMISSION_CONTROL="--admission-control=NamespaceLifecycle,NamespaceExists,LimitRanger,ResourceQuota"

Add your own!

KUBE_API_ARGS=""

EOF

config

cat <>config

KUBE_LOGTOSTDERR="--logtostderr=true"

KUBE_LOG_LEVEL="--v=0"

KUBE_ALLOW_PRIV="--allow-privileged=false"

KUBE_MASTER="--master=http://192.168.29.102:8080"

EOF

controller-manager

cat <>controller-manager

KUBE_CONTROLLER_MANAGER_ARGS=""

EOF

scheduler

cat <>scheduler

KUBE_SCHEDULER_ARGS=""

EOF

6、 etcd k8s startup file

etcd

cat <>/lib/systemd/system/etcd.service

[ Unit]

Description=Etcd Server

Documentation=https://github.com/coreos/etcd

After=network.target

[ Service]

User=root

Type=notify

EnvironmentFile=-/etc/etcd/etcd.conf

ExecStart=/usr/bin/etcd

Restart=on-failure

RestartSec=10s

LimitNOFILE=40000

[ Install]

WantedBy=multi-user.target

EOF

apiserver

cat <>/lib/systemd/system/kube-apiserver.service

[ Unit]

Description=Kubernetes API Server

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

After=network.target

After=etcd.service

Wants=etcd.service

[ Service]

User=root

EnvironmentFile=-/etc/kubernetes/config

EnvironmentFile=-/etc/kubernetes/apiserver

ExecStart=/usr/bin/kube-apiserver \

$KUBE_LOGTOSTDERR \

$KUBE_LOG_LEVEL \

$KUBE_ETCD_SERVERS \

$KUBE_API_ADDRESS \

$KUBE_API_PORT \

$KUBELET_PORT \

$KUBE_ALLOW_PRIV \

$KUBE_SERVICE_ADDRESSES \

$KUBE_ADMISSION_CONTROL \

$KUBE_API_ARGS

Restart=on-failure

Type=notify

LimitNOFILE=65536

[ Install]

WantedBy=multi-user.target

EOF

controller-manager

cat <>/lib/systemd/system/kube-controller-manager.service

[ Unit]

Description=Kubernetes Controller Manager

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

After=etcd.service

After=kube-apiserver.service

Requires=etcd.service

Requires=kube-apiserver.service

[ Service]

User=root

EnvironmentFile=-/etc/kubernetes/config

EnvironmentFile=-/etc/kubernetes/controller-manager

ExecStart=/usr/bin/kube-controller-manager \

$KUBE_LOGTOSTDERR \

$KUBE_LOG_LEVEL \

$KUBE_MASTER \

$KUBE_CONTROLLER_MANAGER_ARGS

Restart=on-failure

LimitNOFILE=65536

[ Install]

WantedBy=multi-user.target

EOF

scheduler

cat <>/lib/systemd/system/kube-scheduler.service

[ Unit]

Description=Kubernetes Scheduler

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

[ Service]

User=root

EnvironmentFile=-/etc/kubernetes/config

EnvironmentFile=-/etc/kubernetes/scheduler

ExecStart=/usr/bin/kube-scheduler \

$KUBE_LOGTOSTDERR \

$KUBE_MASTER

Restart=on-failure

LimitNOFILE=65536

[ Install]

WantedBy=multi-user.target

EOF

7、 Turn on

systemctl daemon-reload

for service in etcd.service kube-apiserver.service kube-controller-manager.service kube-scheduler.service;

do systemctl enable $service;

done

8、 Start and view status

for service in etcd.service kube-apiserver.service kube-controller-manager.service kube-scheduler.service;

do systemctl start $service;

done

for service in etcd.service kube-apiserver.service kube-controller-manager.service kube-scheduler.service;

do systemctl status $service;

done

worker

1、 Download, unzip and move files

wget wget https://dl.k8s.io/v1.9.9/kubernetes-node-linux-amd64.tar.gz

tar -zxvf kubernetes-node-linux-amd64.tar.gz && cd cd kubernetes/node/bin/

mv kube* /usr/bin

2、 Configuration file

config

mkdir -p /etc/kubernetes && cd /etc/kubernetes

cat <>config

KUBE_LOGTOSTDERR="--logtostderr=true"

KUBE_LOG_LEVEL="--v=3"

KUBE_ALLOW_PRIV="--allow-privileged=false"

KUBE_MASTER="--master=http://192.168.29.102:8080" version is not supported

EOF

kubeconfig

mkdir /var/lib/kubelet

cat <>/var/lib/kubelet/kubeconfig

apiVersion: v1

kind: Config

users:

• name: kubelet

clusters:

• name: kubernetes

cluster:

server: http://192.168.29.102:8080

contexts:

• context:

cluster: kubernetes

user: kubelet

name: service-account-context

current-context: service-account-context

EOF

kubelet

cat <>kubelet

KUBELET_ADDRESS="--address=127.0.0.1"

KUBELET_HOSTNAME="--hostname-override=192.168.29.103"

KUBELET_API_SERVER="--api-servers=http://192.168.29.102:8080"

pod infrastructure container

KUBELET_POD_INFRA_CONTAINER="--pod-infra-container-image=registry.access.redhat.com/rhel7/pod-infrastructure:latest"

KUBELET_ARGS="--enable-server=true --enable-debugging-handlers=true --fail-swap-on=false --kubeconfig=/var/lib/kubelet/kubeconfig"

EOF

proxy

cat <>proxy

KUBE_PROXY_ARGS=""

EOF

3、 Startup file

cat <>/lib/systemd/system/kubelet.service

[ Unit]

Description=Kubernetes Kubelet

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

After=docker.service #

Requires=docker.service # Install docker first and then start worker

[ Service]

WorkingDirectory=/var/lib/kubelet

EnvironmentFile=-/etc/kubernetes/config

EnvironmentFile=-/etc/kubernetes/kubelet

ExecStart=/usr/bin/kubelet \

$KUBE_LOGTOSTDERR \

$KUBE_LOG_LEVEL \

$KUBELET_API_SERVER \

$KUBELET_ADDRESS \

$KUBELET_PORT \

$KUBELET_HOSTNAME \

$KUBE_ALLOW_PRIV \

$KUBELET_POD_INFRA_CONTAINER \

$KUBELET_ARGS

Restart=on-failure

KillMode=process

[ Install]

WantedBy=multi-user.target

EOF

proxy

cat <>/lib/systemd/system/kube-proxy.service

[ Unit]

Description=Kubernetes Proxy

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

After=network.target

[ Service]

EnvironmentFile=-/etc/kubernetes/config

EnvironmentFile=-/etc/kubernetes/proxy

ExecStart=/usr/bin/kube-proxy \

$KUBE_LOGTOSTDERR \

$KUBE_LOG_LEVEL \

$KUBE_MASTER \

$KUBE_PROXY_ARGS

Restart=on-failure

LimitNOFILE=65536

[ Install]

WantedBy=multi-user.target

EOF

4、 Install docker I installed it through rpm, it is best to install it through yum, regardless of dependency

cd /data/

yum -y install container-selinux libcgroup libltdl.so.7 pigz libtool-ltdl

rpm -ivh docker-ce-18.03.1.ce-1.el7.centos.x86_64.rpm --nodeps #May involve dependency issues

5、 boot

systemctl daemon-reload

for service in docker.service kube-proxy.service kubelet.service;

do systemctl enable $service;

done

6、 Start worker

for service in docker.service kube-proxy.service kubelet.service;

do systemctl start $service;

done

Check on master

[ root@ansible-k8s2 system]# kubectl get nodes

NAME STATUS ROLES AGE VERSION

192.168.29.103 Ready 16h v1.9.9

[ root@ansible-k8s2 system]# kubectl get cs

NAME STATUS MESSAGE ERROR

controller-manager Healthy ok

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

scheduler Healthy ok

Note: If you execute kubectl and prompt “cannot excute binary file”, this is a problem that occurs after the downloaded file is decompressed. I just need to re-decompress and move it.

github address: https://github.com/chances-for-those-who-have-prepared/study/blob/master/k8s/install_k8s_by_manual

If you have any questions, please refer to the github address: https://github.com/chances-for-those-who-have-prepared/study/issues