码迷,mamicode.com
首页 > Web开发 > 详细

安装Kubernetes(K8S)

时间:2020-07-09 19:29:47      阅读:75      评论:0      收藏:0      [点我收藏+]

标签:方式   服务   ISE   containe   token   master   实验   git   control   

安装Kubernetes(K8S)

用kubeadm的方法安装k8s:
环境: 三台主机 一台master 俩台node
三台主机的硬件需求:
·最少2G内存
·最少2个CPU

更改hosts文件:

[root@master ~]# cat   /etc/hosts
192.168.172.134   master
192.168.172.135   node1
192.168.172.136   node2

关闭swap和selinux 防火墙(实验环境 ) 并设置swap内核参数
永久关闭swap 注释掉就好

cat  /etc/fstab
#/dev/mapper/cl-swap     swap                    swap    defaults        0 0     

关闭selinux

vim  /etc/selinux/config
SELINUX=disabled   ##更改成disabled

关闭防火墙:

systemctl stop  firewalld
systemctl disable  firewalld

设置swap内核参数:

vim   /etc/sysctl.conf
vm.swappiness = 0

重新加载

swapoff -a

设置桥接网:
先加载模块: modprobe br_netfilter

cat <<EOF | sudo tee /etc/sysctl.d/k8s.conf
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
EOF

重新加载并查看:

sysctl  -p

安装docker三台都需要操作

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

yum-config-manager --add-repo https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo

yum makecache fast

yum -y install docker-ce-18.06.3.ce-3.el7

开启服务并且自启动:

systemctl start   docker  
systemctl enable  docker

三台都需要安装:

[root@master ~]# cat   /etc/yum.repos.d/kubernetes.repo 
[kubernetes]
name=Kubernetes
baseurl=https://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64/
enabled=1
gpgcheck=1
repo_gpgcheck=1
gpgkey=https://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg https://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpg

下载kubernetes

yum -y install     kubelet-1.17.0  kubeadm-1.17.0  kubectl-1.17.0

开启服务:

systemctl start   kubelet.service && systemctl enable  kubelet
下载镜像,打上标签,删除之前的

[root@master ~]# vim caoyi.sh

caoyi=registry.aliyuncs.com/google_containers
source=k8s.gcr.io

docker pull $caoyi/kube-apiserver:v1.17.0
docker pull $caoyi/kube-controller-manager:v1.17.0
docker pull $caoyi/kube-scheduler:v1.17.0
docker pull $caoyi/kube-proxy:v1.17.0
docker pull $caoyi/pause:3.1
docker pull $caoyi/etcd:3.4.3-0
docker pull $caoyi/coredns:1.6.5

docker tag $caoyi/kube-apiserver:v1.17.0 $source/kube-apiserver:v1.17.0
docker tag $caoyi/kube-controller-manager:v1.17.0 $source/kube-controller-manager:v1.17.0
docker tag $caoyi/kube-scheduler:v1.17.0 $source/kube-scheduler:v1.17.0
docker tag $caoyi/kube-proxy:v1.17.0 $source/kube-proxy:v1.17.0
docker tag $caoyi/pause:3.1 $source/pause:3.1
docker tag $caoyi/etcd:3.4.3-0 $source/etcd:3.4.3-0
docker tag $caoyi/coredns:1.6.5 $source/coredns:1.6.5

docker rmi $caoyi/kube-apiserver:v1.17.0
docker rmi $caoyi/kube-controller-manager:v1.17.0
docker rmi $caoyi/kube-scheduler:v1.17.0
docker rmi $caoyi/kube-proxy:v1.17.0
docker rmi $caoyi/pause:3.1
docker rmi $caoyi/etcd:3.4.3-0
docker rmi $caoyi/coredns:1.6.5

下载flannel:

docker   pull   quay.io/coreos/flannel:v0.12.0-adm64

三台主机都需要这样做

配置网络:

[root@master ~]# mkdir -p /etc/cni/net.d/
[root@master ~]# cat    /etc/cni/net.d/10-flannel.conf
{"name":"cbr0","type":"flannel","delegate":{"isDefaultGateway":true}}
[root@master ~]# mkdir /usr/share/oci-umount/oci-umount.d -p
[root@master ~]# mkdir /run/flannel/
[root@master ~]# cat   /run/flannel/subnet.env 
FLANNEL_NETWORK=10.244.0.0/16
FLANNEL_SUBNET=10.244.0.1/24
FLANNEL_MTU=1450
FLANNEL_IPMASQ=true

初始化 在master主机上:

kubeadm  init   --kubernetes-version=v1.17.0 --apiserver-advertise-address  192.168.172.134  --pod-network-cidr  10.244.0.0/16

初始化完成后按照提示在master创建文件

mkdir -p $HOME/.kube
sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
sudo chown $(id -u):$(id -g) $HOME/.kube/config

按照提示将网络部署到集群

kubectl apply -f https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml

因为网址是国外的可能无法访问,我把下载好的yml文件传到github上,方便下载,然后把其他的两个节点加入集群

git clone https://github.com/mrlxxx/kube-flannel.yml.git

kubectl apply -f  kube-flannel.yml

  kubeadm join 192.168.172.134:6443 --token nwnany.7rvdbwfm4wjtxa62 --discovery-token-ca-cert-hash sha256:c44ea7dcf98f5611a34d239dd2fc3420ac4e2993b7aa874d70c01f90f1f8fe60

技术图片

 

 

 

注意:如果出现节点NotReady的状况,可按照下面的方式进行配置(三台主机都需要配置):
 
# mkdir -p /etc/cni/net.d/

# cat <<EOF> /etc/cni/net.d/10-flannel.conf
{
"name": "cbr0",
"type": "flannel",
"delegate": {
"isDefaultGateway": true
}
}
 
EOF
[root@master ~]# kubectl get cs
NAME                 STATUS    MESSAGE             ERROR
controller-manager   Healthy   ok                  
scheduler            Healthy   ok                  
etcd-0               Healthy   {"health":"true"}

 

安装Kubernetes(K8S)

标签:方式   服务   ISE   containe   token   master   实验   git   control   

原文地址:https://www.cnblogs.com/cy888888/p/13275278.html

(0)
(0)
   
举报
评论 一句话评论(0
登录后才能评论!
© 2014 mamicode.com 版权所有  联系我们:gaon5@hotmail.com
迷上了代码!