k8s安装redis

# 1.基于helm安装

安装helm不在详述，见其他文章

# 2.创建 redis-cluster 目录

[root@master linux-amd64]# mkdir -p /opt/charts/redis-cluster
[root@master linux-amd64]# cd /opt/charts/redis-cluster/
[root@master redis-cluster]# ll
total 0

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# 2.下载最新stalbe/redis-ha

[root@master redis-cluster]# helm repo update
WARNING: Kubernetes configuration file is group-readable. This is insecure. Location: /root/.kube/config
WARNING: Kubernetes configuration file is world-readable. This is insecure. Location: /root/.kube/config
Hang tight while we grab the latest from your chart repositories...
...Successfully got an update from the "stable" chart repository
Update Complete. ⎈Happy Helming!⎈
[root@master redis-cluster]# helm pull stable/redis-ha
WARNING: Kubernetes configuration file is group-readable. This is insecure. Location: /root/.kube/config
WARNING: Kubernetes configuration file is world-readable. This is insecure. Location: /root/.kube/config
[root@master redis-cluster]# ll
total 20
-rw-r--r--. 1 root root 17486 Nov  9 09:54 redis-ha-4.4.4.tgz

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# 3.解压 charts，复制 values.yaml设置

[root@master redis-cluster]# tar zxvf redis-ha-*.tgz
redis-ha/Chart.yaml
tar: redis-ha/Chart.yaml: implausibly old time stamp 1970-01-01 08:00:00
redis-ha/values.yaml
tar: redis-ha/values.yaml: implausibly old time stamp 1970-01-01 08:00:00
redis-ha/templates/NOTES.txt
tar: redis-ha/templates/NOTES.txt: implausibly old time stamp 1970-01-01 08:00:00
redis-ha/templates/_configs.tpl
tar: redis-ha/templates/_configs.tpl: implausibly old time stamp 1970-01-01 08:00:00
redis-ha/templates/_helpers.tpl
tar: redis-ha/templates/_helpers.tpl: implausibly old time stamp 1970-01-01 08:00:00
redis-ha/templates/redis-auth-secret.yaml
tar: redis-ha/templates/redis-auth-secret.yaml: implausibly old time stamp 1970-01-01 08:00:00
redis-ha/templates/redis-ha-announce-service.yaml
tar: redis-ha/templates/redis-ha-announce-service.yaml: implausibly old time stamp 1970-01-01 08:00:00
redis-ha/templates/redis-ha-configmap.yaml
tar: redis-ha/templates/redis-ha-configmap.yaml: implausibly old time stamp 1970-01-01 08:00:00
redis-ha/templates/redis-ha-exporter-script-configmap.yaml
tar: redis-ha/templates/redis-ha-exporter-script-configmap.yaml: implausibly old time stamp 1970-01-01 08:00:00
redis-ha/templates/redis-ha-pdb.yaml
tar: redis-ha/templates/redis-ha-pdb.yaml: implausibly old time stamp 1970-01-01 08:00:00
redis-ha/templates/redis-ha-role.yaml
tar: redis-ha/templates/redis-ha-role.yaml: implausibly old time stamp 1970-01-01 08:00:00
redis-ha/templates/redis-ha-rolebinding.yaml
tar: redis-ha/templates/redis-ha-rolebinding.yaml: implausibly old time stamp 1970-01-01 08:00:00
redis-ha/templates/redis-ha-service.yaml
tar: redis-ha/templates/redis-ha-service.yaml: implausibly old time stamp 1970-01-01 08:00:00
redis-ha/templates/redis-ha-serviceaccount.yaml
tar: redis-ha/templates/redis-ha-serviceaccount.yaml: implausibly old time stamp 1970-01-01 08:00:00
redis-ha/templates/redis-ha-servicemonitor.yaml
tar: redis-ha/templates/redis-ha-servicemonitor.yaml: implausibly old time stamp 1970-01-01 08:00:00
redis-ha/templates/redis-ha-statefulset.yaml
tar: redis-ha/templates/redis-ha-statefulset.yaml: implausibly old time stamp 1970-01-01 08:00:00
redis-ha/templates/redis-haproxy-deployment.yaml
tar: redis-ha/templates/redis-haproxy-deployment.yaml: implausibly old time stamp 1970-01-01 08:00:00
redis-ha/templates/redis-haproxy-service.yaml
tar: redis-ha/templates/redis-haproxy-service.yaml: implausibly old time stamp 1970-01-01 08:00:00
redis-ha/templates/redis-haproxy-serviceaccount.yaml
tar: redis-ha/templates/redis-haproxy-serviceaccount.yaml: implausibly old time stamp 1970-01-01 08:00:00
redis-ha/templates/redis-haproxy-servicemonitor.yaml
tar: redis-ha/templates/redis-haproxy-servicemonitor.yaml: implausibly old time stamp 1970-01-01 08:00:00
redis-ha/templates/tests/test-redis-ha-configmap.yaml
tar: redis-ha/templates/tests/test-redis-ha-configmap.yaml: implausibly old time stamp 1970-01-01 08:00:00
redis-ha/templates/tests/test-redis-ha-pod.yaml
tar: redis-ha/templates/tests/test-redis-ha-pod.yaml: implausibly old time stamp 1970-01-01 08:00:00
redis-ha/OWNERS
tar: redis-ha/OWNERS: implausibly old time stamp 1970-01-01 08:00:00
redis-ha/README.md
tar: redis-ha/README.md: implausibly old time stamp 1970-01-01 08:00:00
redis-ha/ci/haproxy-enabled-values.yaml
tar: redis-ha/ci/haproxy-enabled-values.yaml: implausibly old time stamp 1970-01-01 08:00:00
[root@master redis-cluster]# cp redis-ha/values.yaml .
[root@master redis-cluster]# ll
total 32
drwxr-xr-x. 4 root root   101 Nov  9 09:54 redis-ha
-rw-r--r--. 1 root root 17486 Nov  9 09:54 redis-ha-4.4.4.tgz
-rwxr-xr-x. 1 root root 11632 Nov  9 09:55 values.yaml
[root@master redis-cluster]#

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# 4.创建 start.sh 脚本记录启动命令

[root@master redis-cluster]# vim start.sh 
[root@master redis-cluster]# cat start.sh 
#!/bin/sh
set -x

cd /opt/charts/redis-cluster 

helm install redis --create-namespace --namespace dependency -f ./values.yaml ./redis-ha
[root@master redis-cluster]# ll
total 36
drwxr-xr-x. 4 root root   101 Nov  9 09:54 redis-ha
-rw-r--r--. 1 root root 17486 Nov  9 09:54 redis-ha-4.4.4.tgz
-rw-r--r--. 1 root root   138 Nov  9 10:03 start.sh
-rwxr-xr-x. 1 root root 11632 Nov  9 09:55 values.yaml
[root@master redis-cluster]# pwd
/opt/charts/redis-cluster
[root@master redis-cluster]#

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# 5.修改当前目录的 values.yaml 配置

#举例values.yaml 配置如下，没有启用PV
#cat values.yaml
image:
  repository: redis
  tag: 5.0.6-alpine

replicas: 2

## Redis specific configuration options
redis:
  port: 6379
  masterGroupName: "mymaster"       # must match ^[\\w-\\.]+$) and can be templated
  config:
    ## For all available options see http://download.redis.io/redis-stable/redis.conf
    min-replicas-to-write: 1
    min-replicas-max-lag: 5   # Value in seconds
    maxmemory: "4g"       # Max memory to use for each redis instance. Default is unlimited.
    maxmemory-policy: "allkeys-lru"  # Max memory policy to use for each redis instance. Default is volatile-lru.
    repl-diskless-sync: "yes"
    rdbcompression: "yes"
    rdbchecksum: "yes"

  resources:
    requests:
      memory: 200Mi
      cpu: 100m
    limits:
      memory: 4000Mi

## Sentinel specific configuration options
sentinel:
  port: 26379
  quorum: 1

  resources:
    requests:
      memory: 200Mi
      cpu: 100m
    limits:
      memory: 200Mi

hardAntiAffinity: true

## Configures redis with AUTH (requirepass & masterauth conf params)
auth: false

persistentVolume:
  enabled: false

hostPath:
  path: "/data/mcs-redis/{{ .Release.Name }}"

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# 6.安装

[root@master redis-cluster]# ./start.sh 
+ cd /opt/charts/redis-cluster
+ helm install redis --create-namespace --namespace dependency -f ./values.yaml ./redis-ha
WARNING: Kubernetes configuration file is group-readable. This is insecure. Location: /root/.kube/config
WARNING: Kubernetes configuration file is world-readable. This is insecure. Location: /root/.kube/config
NAME: redis
LAST DEPLOYED: Mon Nov  9 11:45:19 2020
NAMESPACE: dependency
STATUS: deployed
REVISION: 1
NOTES:
Redis can be accessed via port 6379 and Sentinel can be accessed via port 26379 on the following DNS name from within your cluster:
redis-redis-ha.dependency.svc.cluster.local

To connect to your Redis server:
1. Run a Redis pod that you can use as a client:

   kubectl exec -it redis-redis-ha-server-0 sh -n dependency

2. Connect using the Redis CLI:

  redis-cli -h redis-redis-ha.dependency.svc.cluster.local

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# 7.资源验证

[root@master redis-cluster]# helm ls -A
WARNING: Kubernetes configuration file is group-readable. This is insecure. Location: /root/.kube/config
WARNING: Kubernetes configuration file is world-readable. This is insecure. Location: /root/.kube/config
NAME 	NAMESPACE 	REVISION	UPDATED                                	STATUS  	CHART         	APP VERSION
redis	dependency	1       	2020-11-09 11:45:19.443314165 +0800 CST	deployed	redis-ha-4.4.4	5.0.6      
[root@master redis-cluster]# kubectl get pod,svc -n dependency
NAME                          READY   STATUS    RESTARTS   AGE
pod/redis-redis-ha-server-0   2/2     Running   0          3m19s
pod/redis-redis-ha-server-1   2/2     Running   0          2m48s

NAME                                TYPE        CLUSTER-IP      EXTERNAL-IP   PORT(S)              AGE
service/redis-redis-ha              ClusterIP   None            <none>        6379/TCP,26379/TCP   3m20s
service/redis-redis-ha-announce-0   ClusterIP   10.99.224.212   <none>        6379/TCP,26379/TCP   3m19s
service/redis-redis-ha-announce-1   ClusterIP   10.108.123.21   <none>        6379/TCP,26379/TCP   3m20s

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# 8.redis验证

[root@master redis-cluster]# kubectl exec -it redis-redis-ha-server-0 sh -n dependency
kubectl exec [POD] [COMMAND] is DEPRECATED and will be removed in a future version. Use kubectl kubectl exec [POD] -- [COMMAND] instead.
Defaulting container name to redis.
Use 'kubectl describe pod/redis-redis-ha-server-0 -n dependency' to see all of the containers in this pod.
/data $ 
/data $ 
/data $ 
/data $ redis-cli -h redis-redis-ha.dependency.svc.cluster.local
redis-redis-ha.dependency.svc.cluster.local:6379> ping
PONG
redis-redis-ha.dependency.svc.cluster.local:6379>

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