8天入门docker系列 —— 第五天使用aspnetcore小案例熟悉容器互联和docker-compose一键部署

　　这一篇继续完善webnotebook，如果你读过上一篇的内容，你应该知道怎么去挂载webnotebook日志和容器的远程访问，但是这些还远不够，webnotebook

总要和一些数据库打交道吧，比如说MysqL，mongodb，redis，通常情况下这些存储设备要么是以容器的方式承载，要么是由DBA在非容器环境下统一管理。

一：webnotebook连接容器redis

我们做一个小案例，把网站的所有PV记录到redis中，webnotebook前端显示当前你是 xxx 位用户，案例不重要，重要的是怎么去实现容器互联。

在docker hub 上去找redis的官方镜像，具体redis该如何合理配置这里我就不管了，用最简单的一条docker run 跑起来再说。

@H_502_23@

[root@localhost data]# docker run --name some-redis -d redis
Unable to find image 'redis:latest' locally
latest: Pulling from library/redis
6ae821421a7d: Pull complete 
e3717477b42d: Pull complete 
8e70bf6cc2e6: Pull complete 
0f84ab76ce60: Pull complete 
0903bdecada2: Pull complete 
492876061fbd: Pull complete 
Digest: sha256:dd5b84ce536dffdcab79024f4df5485d010affa09e6c399b215e199a0dca38c4
Status: Downloaded newer image for redis:latest
ed07890700a5cdb7d737a196c28009a9d1b08de35f55d51f53c80e6cfe6ba199
[root@localhost data]# 
[root@localhost data]# 
[root@localhost data]# docker ps
CONTAINER ID        IMAGE               COMMAND                  CREATED              STATUS              PORTS               NAMES
ed07890700a5        redis               "docker-entrypoint.s…"   About a minute ago   Up About a minute   6379/tcp            some-redis

接下来安装 StackExchange.Redis，在Index这个Action中将当前的访问作为一个PV记录到redis中，不过下面的代码要注意一点的就是，为了去访问redis，

这里我采用了redis.webnotebook.com 去映射到redis容器的ip，映射关系可以在创建容器的时候自动追加到 /etc/hosts 中，每一次访问都执行一次Increment自

public class HomeController : Controller { static Logger logger = LogManager.GetLogger(SimpleDemo"); static ConnectionMultiplexer redis = ConnectionMultiplexer.Connect(redis.webnotebook.com:6379); /// <summary> /// 读取mongodb数据数据 </summary> <returns></returns> public IActionResult Index() { var db = redis.GetDatabase(); var num = db.StringIncrement(count); ViewData[num"] = num; return View(); } }

[root@localhost publish]# docker run -d --name webnotebook -p 8080:8080 --link some-redis:redis.webnotebook.com huangxincheng/webnotebook:v1 b931e040de26c4bfc0b49cbc8e626cdcb30ad9bdff523f623c0a2d6c50899a81 [root@localhost publish]# [root@localhost publish]# [root@localhost publish]# docker CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES b931e040de26 huangxincheng/webnotebook:v1 dotnet WebNotebook.…" 2 seconds ago Up 2 seconds 0.0.0.0:8080->8080/tcp webnotebook ed07890700a5 redis 27 minutes ago Up 27 minutes 6379/tcp some-redis

[root@localhost publish]# docker exec -it webnotebook /bin/bash root@b931e040de26:/data# cat /etc/hosts 127.0.0.1 localhost ::1 localhost ip6-localhost ip6-loopback fe00::0 ip6-localnet ff00::mcastprefix ff02::1 ip6-allnodes ff02::2 ip6-allrouters 172.17.0.2 redis.webnotebook.com ed07890700a5 some-redis 172.17.0.3 b931e040de26 root@b931e040de26:/data#

[root@localhost publish]# docker run -d --name webnotebook -p --add-host redis.webnotebook.com:172.17.0.2 huangxincheng/webnotebook:v1 91e7d9c1b575cc34ae98eebfc437d081b852f450104e2b368f898299852b0f18 [root@localhost publish]# docker exec -it webnotebook /bin/bash root@91e7d9c1b575:/data# 172.17.0.2 redis.webnotebook.com 91e7d9c1b575 root@91e7d9c1b575:/data#

[root@localhost publish]# sudo curl -L https://github.com/docker/compose/releases/download/1.23.2/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose [root@localhost publish]# sudo chmod +x /usr/local/bin/docker-compose [root@localhost publish]# docker-compose --version docker-compose version 1.22.0,build f46880fe [root@localhost publish]#

version: 3.0 services: webnotebook: container_name: webnotebook build: context: . dockerfile: ./Dockerfile depends_on: - redis links: - redis:redis.webnotebook.com ports: - 8080:8080 redis: container_name: some-redis image: redis

[root@localhost publish]# docker-compose up --build Building webnotebook Step 1/9 : FROM microsoft/dotnet:2.2-aspnetcore-runtime ---> dad26d192ae6 Step 2/9 : ENV TZ Asia/Shanghai ---> Using cache ---> 72535a350c5d Step 3/9 : LABEL author hxc@qq.com ---> d4dcb4ba06aa Step 4/9 : RUN mkdir /data ---> 6bbfc1537e42 Step 5/9 : COPY ./ / 5401b74ec21f Step 6/9 : WORKDIR / d93e7949b527 Step 7/9 : VOLUME /data/log ---> 39c4285c6d6c Step 8/9 : EXPOSE 8080 ---> d02932ddfbcc Step 9/9 : CMD [ dotnet",WebNotebook.dll ] ---> 0572ceea51a1 Successfully built 0572ceea51a1 Successfully tagged publish_webnotebook:latest Starting some-redis ... done Starting webnotebook ... Attaching to some-redis,webnotebook some-redis | 1:C 22 Feb 2019 09:11:03.160 # oO0OoO0OoO0Oo Redis is starting oO0OoO0OoO0Oo some-redis | 03.160 # Redis version=5.0.3,bits=64,commit=00000000,modified=0,pid=103.160 # Warning: no config file specified,using the default config. In order to specify a config file use redis-server /path/to/redis.conf some-redis | 1:M 03.161 * Running mode=standalone,port=6379. some-redis | 03.161 # WARNING: The TCP backlog setting of 511 cannot be enforced because /proc/sys/net/core/somaxconn is set to the lower value of 12803.161 # Server initialized some-redis | 03.161 # WARNING overcommit_memory is set to 0! Background save may fail under low memory condition. To fix this issue add vm.overcommit_memory = 1' to /etc/sysctl.conf and then reboot or run the command sysctl vm.overcommit_memory=1' this to take effect. some-redis | 03.161 # WARNING you have Transparent Huge Pages (THP) support enabled in your kernel. This will create latency and memory usage issues with Redis. To fix this issue run the command echo never > /sys/kernel/mm/transparent_hugepage/enabled' as root,and add it to your /etc/rc.local in order to retain the setting after a reboot. Redis must be restarted after THP is disabled. some-redis | 03.161 * Ready to accept connections webnotebook | : Microsoft.AspNetCore.DataProtection.KeyManagement.XmlKeyManager[] webnotebook | User profile is available. Using /root/.aspnet/DataProtection-Keys as key repository; keys will not be encrypted at rest. webnotebook | Hosting environment: Production webnotebook | Content root path: /data webnotebook | Now listening on: http://[::]:8080 webnotebook | Application started. Press Ctrl+C to shut down.

8天入门docker系列 —— 第五天 使用aspnetcore小案例熟悉容器互联和docker-compose一键部署

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8天入门docker系列 —— 第五天使用aspnetcore小案例熟悉容器互联和docker-compose一键部署