1.emptyDir类型
删除容器后数据会保存，但是删除pod后数据丢失
[root@k8s-master tomcat_demo]# cat mysql-rc.yml
apiVersion: v1
kind: ReplicationController
metadata:
name: mysql
namespace: tomcat
spec:
replicas: 1
selector:
app: mysql
template:
metadata:
labels:
app: mysql
spec:
volumes: *
- name: mysql *
emptyDir: {} *
containers:
- name: mysql
image: 10.0.0.11:5000/mysql:5.7
volumeMounts: *
- name: mysql *
mountPath: /var/lib/mysql *
ports:
- containerPort: 3306
env:
- name: MYSQL_ROOT_PASSWORD
value: '123456'
2. HostPath类型
删除容器与删除pod，数据都会保存
[root@k8s-master tomcat_demo]# cat mysql-rc.yml
apiVersion: v1
kind: ReplicationController
metadata:
name: mysql
namespace: tomcat
spec:
replicas: 1
selector:
app: mysql
template:
metadata:
labels:
app: mysql
spec:
nodeName: 10.0.0.13
volumes:
- name: mysql
hostPath: *
path: /data/mysql *
containers:
- name: mysql
image: 10.0.0.11:5000/mysql:5.7
volumeMounts: *
- name: mysql *
mountPath: /var/lib/mysql *
ports:
- containerPort: 3306
env:
- name: MYSQL_ROOT_PASSWORD
value: '123456'
3.nfs类型
[root@k8s-master tomcat_demo]# cat mysql-rc.yml
apiVersion: v1
kind: ReplicationController
metadata:
name: mysql
namespace: tomcat
spec:
replicas: 1
selector:
app: mysql
template:
metadata:
labels:
app: mysql
spec:
nodeName: 10.0.0.13
volumes:
- name: mysql
nfs: *
path: /data/tomcat-db *
server: 10.0.0.11 *
containers:
- name: mysql
image: 10.0.0.11:5000/mysql:5.7
volumeMounts: *
- name: mysql *
mountPath: /var/lib/mysql *
ports:
- containerPort: 3306
env:
- name: MYSQL_ROOT_PASSWORD
value: '123456'
4.分布式存储glusterfs
Glusterfs是一个开源分布式文件系统，具有强大的横向扩展能力，可支持数PB存储容量和数千客户端，通过网络互联成一个并行的网络文件系统。具有可扩展性、高性能、高可用性等特点
1.安装glusterfs
- 所有节点：
yum install centos-release-gluster -y
yum install install glusterfs-server -y
systemctl start glusterd.service
systemctl enable glusterd.service
- 为gluster集群增加存储单元brick
mkdir -p /gfs/test1
mkdir -p /gfs/test2
mkdir -p /gfs/test3
2.添加存储资源池
master节点：
gluster peer probe k8s-node1
gluster peer probe k8s-node2
gluster pool list
3.glusterfs卷管理
- 创建分布式复制卷
gluster volume create dddd replica 2 k8s-master:/gfs/test1 k8s-node-1:/gfs/test1 k8s-master:/gfs/test2 k8s-node-1:/gfs/test2 force - 启动卷
gluster volume start dddd - 查看卷
gluster volume info dddd - 挂载卷
mount -t glusterfs 10.0.0.11:/dddd /mnt
4.添加分布式复制卷
gluster volume add-brick oldxu replica 2 k8s-master:/gfs/test2 k8s-node-1:/gfs/test2 k8s-node-2:/gfs/test2 force
5.扩容
gluster volume add-brick oldxu k8s-master:/gfs/test3 k8s-node-1:/gfs/test3 force
6.k8s 对接glusterfs存储
glusterfs对接需要创建endpoints和service
- 创建endpoints
vi glusterfs-ep.yaml
iapiVersion: v1
kind: Endpoints
metadata:
name: glusterfs
namespace: tomcat
subsets:
- addresses:
- ip: 10.0.0.11
- ip: 10.0.0.12
- ip: 10.0.0.13
ports:
- port: 49152
protocol: TCP
- 创建service
vi glusterfs-svc.yaml
iapiVersion: v1
kind: Service
metadata:
name: glusterfs
namespace: tomcat
spec:
ports:
- port: 49152
protocol: TCP
targetPort: 49152
sessionAffinity: None
type: ClusterIP
endpoints和service关联只需要name跟namespace相同
-
修改mysql的rc文件
path为创建的卷名
image.png
5.k8s映射外部服务
把外部的服务，通过svc和endpoint映射到k8s内部
不再创建mysql-rc，创建endpoint链接外端数据库
- 编写endpoint文件
[root@k8s-master wordpress]# cat mysql-ep.yaml
apiVersion: v1
kind: Endpoints
metadata:
name: mysql-wp
namespace: wordpress
subsets:
- addresses:
- ip: 10.0.0.12
ports:
- port: 3306
protocol: TCP
[root@k8s-master wordpress]# cat mysql-svc.yml
apiVersion: v1
kind: Service
metadata:
namespace: wordpress
name: mysql-wp
spec:
ports:
- port: 3306
targetPort: 3306
- 在12节点创建数据库
yum install -y mariadb-server
systemctl start mariadb
create database wordpress;
grant all on wordpress.* to wordpress@'%' identified by 'wordpress'; - 启动
kubectl create namespace wordpress
kubectl create -f .
6.pv和pvc
全局资源：所有namespace都能看见的资源 node、naspace、pv
局部资源：只属于某一个namespace下的资源 pod、rc、dashdoard、pvc ~ ~ ~
管理员创建pv，pvc使用资源
- 创建两个pv
[root@k8s-master pv_pvc]# cat mysql_pv.yaml
apiVersion: v1
kind: PersistentVolume
metadata:
name: pv1
labels:
type: nfs
spec:
capacity:
storage: 10Gi
accessModes:
- ReadWriteMany
persistentVolumeReclaimPolicy: Recycle
nfs:
path: "/data/pv1"
server: 10.0.0.11
[root@k8s-master pv_pvc]# cat mysql_pv2.yaml
apiVersion: v1
kind: PersistentVolume
metadata:
name: pv2
labels:
type: nfs
spec:
capacity:
storage: 30Gi
accessModes:
- ReadWriteMany
persistentVolumeReclaimPolicy: Recycle
nfs:
path: "/data/pv2"
server: 10.0.0.11
- 创建pvc
[root@k8s-master pv_pvc]# cat mysql_pvc.yaml
kind: PersistentVolumeClaim
apiVersion: v1
metadata:
name: pvc1
namespace: tomcat
spec:
accessModes:
- ReadWriteMany
resources:
requests:
storage: 20Gi
创建的pvc为20G，会在pv1上使用
image.png
- 指定存储类型为pvc
spec:
nodeName: 10.0.0.13
volumes:
- name: mysql
persistentVolumeClaim:
claimName: pvc1
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