0x00 前言
本篇文章总结下，项目背景是需要在 Kubernetes 集群中部署 Redis 单机 / 集群，需要利用 Statefulsets 与 NFS 来生成。
0x01 单机 Redis 搭建
创建 ConfigMap
首先，把 Redis 的配置文件 redis.conf 存储在 configmap 中，注意其中定义的 Redis 运行目录：/data/middleware-data/redis/
apiVersion: v1
data:
redis.conf: |
bind 0.0.0.0
port 6379
requirepass xxxxxx
pidfile .pid
appendonly yes
cluster-config-file nodes-6379.conf
pidfile /data/middleware-data/redis/log/redis-6379.pid
cluster-config-file /data/middleware-data/redis/conf/redis.conf
dir /data/middleware-data/redis/data/
logfile "/data/middleware-data/redis/log/redis-6379.log"
cluster-node-timeout 5000
protected-mode no
kind: ConfigMap
metadata:
creationTimestamp: "2021-06-27T10:01:29Z"
name: redis-conf
namespace: xxxx
创建 StatefulSet
创建 StatefulSet，并把数据挂载到宿主机上。注意，我们使用 initContainers 来完成前置工作，如目录创建等；
apiVersion: apps/v1beta2
kind: StatefulSet
metadata:
creationTimestamp: "2021-06-27T10:03:08Z"
generation: 1
name: redis
namespace: xxxx
spec:
podManagementPolicy: OrderedReady
replicas: 1
revisionHistoryLimit: 10
selector:
matchLabels:
name: redis
serviceName: redis
template:
metadata:
creationTimestamp: null
labels:
name: redis
spec:
containers:
- command:
- sh
- -c
- exec redis-server /data/middleware-data/redis/conf/redis.conf
image: redis:5.0.6
imagePullPolicy: IfNotPresent
name: redis
ports:
- containerPort: 6379
name: redis
protocol: TCP
resources: {}
terminationMessagePath: /dev/termination-log
terminationMessagePolicy: File
volumeMounts:
- mountPath: /data/middleware-data/redis/conf/
name: redis-config
- mountPath: /data/middleware-data/redis/
name: data
dnsPolicy: ClusterFirst
initContainers:
- command:
- sh
- -c
- mkdir -p /data/middleware-data/redis/log/;mkdir -p /data/middleware-data/redis/conf/;mkdir -p /data/middleware-data/redis/data/
image: busybox
imagePullPolicy: Always
name: init-redis
resources: {}
terminationMessagePath: /dev/termination-log
terminationMessagePolicy: File
volumeMounts:
- mountPath: /data/middleware-data/redis/
name: data
restartPolicy: Always
schedulerName: default-scheduler
securityContext: {}
terminationGracePeriodSeconds: 30
volumes:
- configMap:
defaultMode: 420
name: redis-conf
name: redis-config
- hostPath:
path: /data/middleware-data/redis/
type: ""
name: data
updateStrategy:
rollingUpdate:
partition: 0
type: RollingUpdate
创建 Service
apiVersion: v1
kind: Service
metadata:
creationTimestamp: "2021-06-27T10:03:44Z"
labels:
name: redis
name: redis
namespace: xxxx
spec:
clusterIP: 172.16.255.66
externalTrafficPolicy: Cluster
ports:
- name: redis
nodePort: 30020
port: 6379
protocol: TCP
targetPort: 6379
selector:
name: redis
sessionAffinity: None
type: NodePort
0x02 Redis 集群搭建
第一步：创建 NFS 存储
创建 PV
创建 PVC
使用 NFS 配置 StatefulSet 的动态持久化存储
