- 一 概述
- 二 准备工作
- 三 Redis 单实例部署
- 四 使用Redis
- 脚注
一 概述
一句话总结本文内容:
如何将以下 Redis 单实例 部署到OpenShift 4.
二 Redis 单实例部署
创建新Redis应用, 多个版本可供选择:
- 临时存储Redis 3.2版本
oc new-app --name=redis --template=redis-ephemeral:3.2 - 临时存储Redis 5.0版本
oc new-app --name=redis --image-stream=redis-5-rhel7:latest - 持久化存储Redis 3.2版本
oc new-app --name=redis --template=redis-persistent:3.2 --param=VOLUME_CAPACITY=1Gi
示例输出
代码语言：javascript复制$ oc new-app --template=redis-ephemeral --name=redis
--> Deploying template "openshift/redis-ephemeral" to project demo
Redis (Ephemeral)
---------
Redis in-memory data structure store, without persistent storage. For more information about using this template, including OpenShift considerations, see https://github.com/sclorg/redis-container/blob/master/3.2.
WARNING: Any data stored will be lost upon pod destruction. Only use this template for testing
The following service(s) have been created in your project: redis.
Password: onTXNxV05Nsiea5c
Connection URL: redis://redis:6379/
For more information about using this template, including OpenShift considerations, see https://github.com/sclorg/redis-container/blob/master/3.2.
* With parameters:
* Memory Limit=512Mi
* Namespace=openshift
* Database Service Name=redis
* Redis Connection Password=onTXNxV05Nsiea5c # generated
* Version of Redis Image=3.2
--> Creating resources ...
secret "redis" created
service "redis" created
deploymentconfig.apps.openshift.io "redis" created
--> Success
Application is not exposed. You can expose services to the outside world by executing one or more of the commands below:
'oc expose svc/redis'
Run 'oc status' to view your app.
oc new-app --name=redis --image-stream=redis-5-rhel7:latest
--> Found image 3273270 (3 months old) in image stream "openshift/redis-5-rhel7" under tag "latest" for "redis-5-rhel7:latest"
Redis 5
-------
Redis 5 available as container, is an advanced key-value store. It is often referred to as a data structure server since keys can contain strings, hashes, lists, sets and sorted sets. You can run atomic operations on these types, like appending to a string; incrementing the value in a hash; pushing to a list; computing set intersection, union and difference; or getting the member with highest ranking in a sorted set. In order to achieve its outstanding performance, Redis works with an in-memory dataset. Depending on your use case, you can persist it either by dumping the dataset to disk every once in a while, or by appending each command to a log.
Tags: database, redis, redis5, rh-redis5
* This image will be deployed in deployment config "redis"
* Port 6379/tcp will be load balanced by service "redis"
* Other containers can access this service through the hostname "redis"
* This image declares volumes and will default to use non-persistent, host-local storage.
You can add persistent volumes later by running 'oc set volume dc/redis --add ...'
--> Creating resources ...
imagestreamtag.image.openshift.io "redis:latest" created
deploymentconfig.apps.openshift.io "redis" created
service "redis" created
--> Success
Application is not exposed. You can expose services to the outside world by executing one or more of the commands below:
'oc expose svc/redis'
Run 'oc status' to view your app.三 使用Redis
容器内同一租户 的Java应用/微服务等直接通过以下域名 端口来使用: redis:6379 密码在部署时会有提示, 如:* Redis Connection Password=onTXNxV05Nsiea5c # generated, 如果提示没有就仔细在其他地方找找.
脚注
--name=redis可以按需调整;--param可以传入创建部署时候的参数, 比如本次部署传入的是要求存储为1Gi.redis:6379这种只能供 容器内同一租户 调用. 容器外 调用需要通过NodePort方式, 且可能需要开通NetworkPolicy防火墙策略.
