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k8s
rke安装k8s集群
1、环境准备
虚拟机 * 3
配置阿里云yum源
2、下载rke二进制文件
安装节点下载即可
curl -L https://github.com/rancher/rke/releases/download/v0.3.2/rke_linux-amd64 -o /usr/bin/rke
chmod +x /usr/bin/rke
3、关闭防火墙、selinux等
关闭所有主机的selinux、firewalld
setenforce 0
sed -i 's/SELINUX=enforcing/SELINUX=disabled/' /etc/selinux/config
systemctl stop firewalld && systemctl disable firewalld
4、安装docker
所有节点
yum install -y epel-release
yum install -y yum-utils net-tools conntrack-tools wget
yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
yum install -y docker-ce-18.06.1.ce
启动
systemctl start docker
systemctl enable docker
配置加速
sudo mkdir -p /etc/docker
sudo tee /etc/docker/daemon.json <<-'EOF'
{
"registry-mirrors": ["https://jz73200c.mirror.aliyuncs.com"]
}
EOF
sudo systemctl daemon-reload
sudo systemctl restart docker
5、初始化docker用户
所有节点
useradd -m docker && echo "1qaz@WSX" | passwd --stdin docker
6、安装节点配置互信
ssh-keygen -t rsa -b 2048 -N '' -f ~/.ssh/id_rsa
ssh-copy-id docker@节点地址
7、创建集群配置文件
cat > rancher-cluster.yml <<EOF
nodes:
- address: 192.168.146.134
internal_address: 192.168.146.134
user: docker
role: [controlplane,worker,etcd]
- address: 192.168.146.135
internal_address: 192.168.146.135
user: docker
role: [controlplane,worker,etcd]
- address: 192.168.146.136
internal_address: 192.168.146.136
user: docker
role: [controlplane,worker,etcd]
services:
etcd:
snapshot: true
creation: 6h
retention: 24h
EOF
8.下载镜像
可提前下载好所需镜像
docker pull rancher/rke-tools:v0.1.50
docker pull rancher/hyperkube:v1.15.5-rancher1
docker pull rancher/coreos-etcd:v3.3.10-rancher1
9、构建集群
rke up --config ./rancher-cluster.yml
10、查看结果
11、配置
主节点
mkdir ~/.kube
cat kube_config_rancher-cluster.yml > ~/.kube/config
12、安装kubectl等
cat > /etc/yum.repos.d/kubernetes.repo <<EOF
[kubernetes]
name=Kubernetes
baseurl=http://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64
enabled=1
gpgcheck=0
repo_gpgcheck=0
gpgkey=http://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg
http://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpg
EOF
主机点安装Kubectl即可
yum -y install kubectl
安装自动补全
yum install -y bash-completion
source /usr/share/bash-completion/bash_completion
source <(kubectl completion bash)
echo "source <(kubectl completion bash)" >> ~/.bashrc
13、查看节点信息
kubectl get node
14、发布应用测试
cat >> nginx.yaml <<EOF
apiVersion: v1
kind: Service
metadata:
labels:
app: nginx-service
name: nginx-service
namespace: default
spec:
ports:
- port: 80
protocol: TCP
targetPort: 80
selector:
app: nginx
sessionAffinity: None
type: ClusterIP
---
apiVersion: apps/v1
kind: Deployment
metadata:
name: nginx-deployment
spec:
selector:
matchLabels:
app: nginx
replicas: 6
template:
metadata:
labels:
app: nginx
spec:
containers:
- name: nginx
image: nginx:1.16.0
ports:
- containerPort: 80
EOF
创建
kubectl apply -f nginx.yaml
查看状态
kubectl get pod -o wide
查看svc,测试
kubectl get svc
删除
kubectl delete deploy --all
kubectl delete svc/nginx-service