K3S + MySQL
先更新apt-get
sudo apt-get update
下载curl
sudo apt install curl
安装docker
curl -fsSL https://get.docker.com | bash -s docker --mirror Aliyun
开启docker
systemctl start docker
docker version # 查看docker 是否开启
systemctl enable docker
到容器镜像服务 (aliyun.com)开启容器镜像服务
sudo mkdir -p /etc/docker
sudo tee /etc/docker/daemon.json <<-'EOF'
{
"registry-mirrors": ["https://t26vj3ej.mirror.aliyuncs.com"]
}
EOF
sudo systemctl daemon-reload
sudo systemctl restart docker
安装k3s
curl -sfL https://rancher-mirror.rancher.cn/k3s/k3s-install.sh | INSTALL_K3S_MIRROR=cn sh -s - --docker
看k3s状态
systemctl start k3s # 开启k3s
service k3s status
安装k3s dashboard
wget https://raw.githubusercontent.com/kubernetes/dashboard/v2.5.1/aio/deploy/recommended.yaml
编辑yaml文件：默认的yaml文件中 Dashboard 服务类型是ClusterIP，ClusterIP只能在集群内部访问，不能使用外部浏览器访问，我们可以选择将"ClusterIP"改为"NodePort"或"LoadBalancer"，也可以使用ingress做代理，本示例选择使用LoadBalancer
# vim recommended.yaml
....
kind: Service
apiVersion: v1
metadata:
labels:
k8s-app: kubernetes-dashboard
name: kubernetes-dashboard
namespace: kubernetes-dashboard
spec:
type: LoadBalancer # 新增，缺省情况下type默认是ClusterIP，我们这里指定type位LoadBalancer
loadBalancerIP: 192.168.1.207 # 设置外部ip，此ip需要能够在宿主机使用
ports:
- port: 443
targetPort: 8443
selector:
k8s-app: kubernetes-dashboard
部署，建议使用 apply 参数创建，而非 create 参数创建
# kubectl apply -f recommended.yaml
namespace/kubernetes-dashboard created
serviceaccount/kubernetes-dashboard created
service/kubernetes-dashboard created
secret/kubernetes-dashboard-certs created
secret/kubernetes-dashboard-csrf created
secret/kubernetes-dashboard-key-holder created
configmap/kubernetes-dashboard-settings created
role.rbac.authorization.k8s.io/kubernetes-dashboard created
clusterrole.rbac.authorization.k8s.io/kubernetes-dashboard created
rolebinding.rbac.authorization.k8s.io/kubernetes-dashboard created
clusterrolebinding.rbac.authorization.k8s.io/kubernetes-dashboard created
deployment.apps/kubernetes-dashboard created
service/dashboard-metrics-scraper created
deployment.apps/dashboard-metrics-scraper created
查看namespace名为kubernetes-dashboard下的服务
kubectl get -n kubernetes-dashboard svc
我这里的地址是https://192.168.1.207:30651
这里要配置用户管理
创建资源清单的yaml文件
# vim dashboard.admin-user.yaml
# 创建 ServiceAccount
apiVersion: v1
kind: ServiceAccount
metadata:
name: admin-user
namespace: kubernetes-dashboard
---
# 创建 ClusterRoleBinding
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
name: admin-user
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: cluster-admin
subjects:
- kind: ServiceAccount
name: admin-user
namespace: kubernetes-dashboard
部署资源
kubectl apply -f dashboard.admin-user.yaml
获取token
sudo k3s kubectl -n kubernetes-dashboard create token admin-user
登录了之后就是这样的
之后安装mysql
按照图下图操作，打开部署界面
部署myql，部署用的yaml如下
apiVersion: apps/v1
kind: Deployment
metadata:
name: mysql-deployment
labels:
app: mysql
spec:
replicas: 1
selector:
matchLabels:
app: mysql
template:
metadata:
labels:
app: mysql
spec:
containers:
- name: mysql
image: mysql:8.0.30-debian
env:
- name: MYSQL_ROOT_PASSWORD
value: password
ports:
- containerPort: 3306
volumeMounts:
- mountPath: /var/lib/mysql
name: mysql-data
- name: mysql-config
mountPath: /etc/mysql/mysql.conf.d
volumes:
- name: mysql-data
hostPath:
path: /root/data/mysql
type: Directory
- name: mysql-config
hostPath:
path: /root/data/mysql-config
type: Directory
注意：1.其中mysql-config挂载，是为了自定义mysql启动配置。
mysql-data是mysql的数据文件，挂载出来可以持久化，避免数据文件丢失。
myql的dockerhub镜像地址
image: mysql:8.0.30-debian
编辑完成后，点击‘Upload’即可部署成功。
此时，无法通过外网和服务间无法调用，需要部署service来实现，部署yaml如下
apiVersion: v1
kind: Service
metadata:
name: mysql-service
spec:
type: NodePort
selector:
app: mysql
ports:
- protocol: TCP
port: 3306
targetPort: 3306
nodePort: 30000
注意：通过NodePort方式，将服务开启在了30000端口。
之后，在本机上可以直接关闭防火墙
sudo ufw disable
之后，就可以用常用数据库连接工具连接了
