redis是当前最为流行的缓存服务，内存存储，通过IO多路复用型使得即使是单线程，也有非常高的性能。学习redis时需要有redis环境，这里介绍四种方式，一种是单机模式，一种是主从模式，一种是哨兵模式，一种是集群模式。
单机模式
安装单机版的方式比较多，为了可以实现数据可持久化，这里使用动态存储。并且pv是由nfs作为sc提供。
pvc.yaml
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| apiVersion: v1
kind: PersistentVolumeClaim
metadata:
annotations:
labels:
app: redis
name: redis-pv-claim
spec:
accessModes:
- ReadWriteOnce
resources:
requests:
storage: 1Gi
storageClassName: nfs-client
volumeMode: Filesystem
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cm.yaml
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| [root@master redis-single]# cat cm.yaml
apiVersion: v1
data:
redis.conf: |
port 6379
timeout 3000
tcp-keepalive 0
databases 99
kind: ConfigMap
metadata:
name: redis-config
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sts.yaml
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| apiVersion: apps/v1
kind: StatefulSet
metadata:
name: redis
labels:
app: redis
spec:
serviceName: redis
replicas: 1
selector:
matchLabels:
app: redis
template:
metadata:
labels:
app: redis
spec:
containers:
- name: redis
image: redis:5.0.6
imagePullPolicy: IfNotPresent
resources:
limits:
cpu: 450m
memory: 4000Mi
requests:
cpu: 400m
memory: 4000Mi
env:
- name: TZ
value: Asia/Shanghai
command: ["redis-server","/usr/local/etc/redis/redis.conf","--appendonly yes"]
ports:
- containerPort: 6379
volumeMounts:
- name: vol-conf
mountPath: /usr/local/etc/redis
- name: vol-data
mountPath: /data
volumes:
- name: vol-conf
configMap:
name: redis-config
- name: vol-data
persistentVolumeClaim:
claimName: redis-pv-claim
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svc.yaml
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| apiVersion: v1
kind: Service
metadata:
labels:
app: redis
name: redis
spec:
ports:
- name: "6379"
port: 6379
protocol: TCP
targetPort: 6379
selector:
app: redis
type: NodePort
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安装
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| # kubectl create -f pvc.yaml -n redis
# kubectl create -f cm.yaml -n redis
# kubectl create -f sts.yaml -n redis
# kubectl create -f svc.yaml -n redis
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| # kubectl get svc -n redis
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
redis NodePort 10.1.86.36 <none> 6379:30325/TCP 116s
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连接
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| redis-cli -h 10.1.86.36 -p 6379
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主从模式
主从版redis使用bitname的repo源，通过chart直接安装。后端存储使用nfs提供的的sc
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| # helm pull bitnami/redis
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| global:
storageClass: "nfs-client"
architecture: replication
master:
count: 1
startupProbe:
enabled: false
livenessProbe:
enabled: true
readinessProbe:
enabled: false
service:
type: NodePort
replica:
replicaCount: 3
startupProbe:
enabled: true
livenessProbe:
enabled: true
readinessProbe:
enabled: false
service:
type: NodePort
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安装
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| # helm install redis-cluster -f values.yaml ./ -n redis
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使用
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| # redis-cli -h redis-cluster-master
# redis-cli -h redis-cluster-replicas
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哨兵模式
chart包同主从模式，使用不同的配置即可
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| global:
storageClass: "nfs-client"
architecture: replication
sentinel:
enabled: true
startupProbe:
enabled: false
livenessProbe:
enabled: false
readinessProbe:
enabled: false
persistence:
enabled: true
storageClass: "nfs-client"
service:
type: ClusterIP
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安装
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| # helm install redis-sentinel -f values.yaml ./ -n redis
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使用
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| # kubectl get svc -n redis
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
redis-sentinel NodePort 10.1.71.104 <none> 30001:30001/TCP,30000:30000/TCP,26379:30641/TCP,6379:30446/TCP 55s
redis-sentinel-headless ClusterIP None <none> 6379/TCP,26379/TCP 7m37s
redis-sentinel-node-0 NodePort 10.1.215.86 <none> 30003:30003/TCP,30004:30004/TCP,26379:32280/TCP,6379:30801/TCP 55s
redis-sentinel-node-1 NodePort 10.1.79.59 <none> 30005:30005/TCP,30006:30006/TCP,26379:31888/TCP,6379:30775/TCP 55s
redis-sentinel-node-2 NodePort 10.1.71.91 <none> 30007:30007/TCP,30008:30008/TCP,26379:30772/TCP,6379:32272/TCP 55s
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密码
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| kubectl get secret --namespace redis redis-sentinel -o jsonpath="{.data.redis-password}" | base64 -d
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集群模式
集群版redis使用bitname的repo源，通过chart直接安装。后端存储使用nfs提供的的sc
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| # helm pull bitnami/redis-cluster
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修改配置
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| global:
storageClass: "nfs-client"
service:
type: NodePort
redis:
livenessProbe:
enabled: false
readinessProbe:
enabled: false
startupProbe:
enabled: false
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安装
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| # helm install redis-cluster -f values.yaml ./ -n redis
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密码
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| kubectl get secret --namespace "redis" redis-cluster -o jsonpath="{.data.redis-password}" | base64 -d
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查看端口
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| # kubectl get svc -n redis
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
redis-cluster NodePort 10.1.94.93 <none> 6379:32760/TCP 3m28s
redis-cluster-headless ClusterIP None <none> 6379/TCP,16379/TCP 3m28s
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使用
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| # redis-cli -c -h 10.1.94.93 -p 6379 -a t1vUbLlQCG
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验证集群信息
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| 10.1.94.93:6379> CLUSTER info
cluster_state:ok
cluster_slots_assigned:16384
cluster_slots_ok:16384
cluster_slots_pfail:0
cluster_slots_fail:0
cluster_known_nodes:6
cluster_size:3
cluster_current_epoch:6
cluster_my_epoch:1
cluster_stats_messages_ping_sent:44
cluster_stats_messages_pong_sent:44
cluster_stats_messages_sent:88
cluster_stats_messages_ping_received:39
cluster_stats_messages_pong_received:44
cluster_stats_messages_meet_received:5
cluster_stats_messages_received:88
|