作业：Docker安装Nginx

#1、搜索镜像
#2、下载镜像 pull
#3、运行测试
[root@localhost home]# docker pull nginx 
Using default tag: latest
latest: Pulling from library/nginx
33847f680f63: Already exists 
dbb907d5159d: Pull complete 
8a268f30c42a: Pull complete 
b10cf527a02d: Pull complete 
c90b090c213b: Pull complete 
1f41b2f2bf94: Pull complete 
Digest: sha256:8f335768880da6baf72b70c701002b45f4932acae8d574dedfddaf967fc3ac90
Status: Downloaded newer image for nginx:latest
docker.io/library/nginx:latest
#-d 后台运行
#--name 给容器命名
#-p 暴露端口  宿主机端口：容器内部端口
[root@localhost home]# docker run -d --name nginx01 -p 3344:80 nginx
3960a4e43a0252633d1b61f16902bd3926b43111e390b0d812a4daa0544656ac
[root@localhost home]# docker ps 
CONTAINER ID   IMAGE     COMMAND                  CREATED          STATUS          PORTS                                   NAMES
3960a4e43a02   nginx     "/docker-entrypoint.…"   15 seconds ago   Up 14 seconds   0.0.0.0:3344->80/tcp, :::3344->80/tcp   nginx01
[root@localhost home]# curl localhost:3344
<!DOCTYPE html>
<html>
<head>
<title>Welcome to nginx!</title>
<style>
    body {
        width: 35em;
        margin: 0 auto;
        font-family: Tahoma, Verdana, Arial, sans-serif;
    }
</style>
</head>
<body>
<h1>Welcome to nginx!</h1>
<p>If you see this page, the nginx web server is successfully installed and
working. Further configuration is required.</p>
<p>For online documentation and support please refer to
<a href="http://nginx.org/">nginx.org</a>.<br/>
Commercial support is available at
<a href="http://nginx.com/">nginx.com</a>.</p>
<p><em>Thank you for using nginx.</em></p>
</body>
</html>
#进入Nginx容器
[root@localhost home]# docker ps
CONTAINER ID   IMAGE     COMMAND                  CREATED         STATUS         PORTS                                   NAMES
3960a4e43a02   nginx     "/docker-entrypoint.…"   9 minutes ago   Up 9 minutes   0.0.0.0:3344->80/tcp, :::3344->80/tcp   nginx01
[root@localhost home]# docker exec -it nginx01 /bin/bash
root@3960a4e43a02:/# whereis nginx
nginx: /usr/sbin/nginx /usr/lib/nginx /etc/nginx /usr/share/nginx
root@3960a4e43a02:/# cd /etc/nginx/
root@3960a4e43a02:/etc/nginx# ls
conf.d    fastcgi_params    mime.types  modules  nginx.conf  scgi_params  uwsgi_params
root@3960a4e43a02:/etc/nginx#

思考问题：我们每次改动Nginx配置文件，都需要进入容器内部，很麻烦，我要是可以在容器外部提供一个映射路径，达到在容器外部修改文件，容器内部就可以自动修改？？ -v 数据卷技术！

作业：部署Tomcat

#官方的使用 run -it --rm tomcat:9.0
docker run -it --rm tomcat:9.0
#我们之前的启动都是后天启动，停止了容器之后，容器还是可以查到，docker run -it --rm 一般用来测试，用完就删除
#下载启动
docker pull tomcat
#启动运行
docker run -d -p 3355:8080 --name tomcat01 tomcat
#用完就删除的方式测试
[root@localhost home]# docker run -it --rm tomcat:9.0
Unable to find image 'tomcat:9.0' locally
9.0: Pulling from library/tomcat
627b765e08d1: Pull complete 
c040670e5e55: Pull complete 
073a180f4992: Pull complete 
bf76209566d0: Pull complete 
f10db7ba7580: Pull complete 
5b2f970878fa: Pull complete 
ed434bfebf18: Pull complete 
f6c437110aa9: Pull complete 
a772951f83db: Pull complete 
752225c3768e: Pull complete 
Digest: sha256:6e40250d8fac4eca05c2067cb81f79427e4ddbaf4e78d5ecd21c35e8c5f2bfcf
Status: Downloaded newer image for tomcat:9.0
Using CATALINA_BASE:   /usr/local/tomcat
Using CATALINA_HOME:   /usr/local/tomcat
Using CATALINA_TMPDIR: /usr/local/tomcat/temp
Using JRE_HOME:        /usr/local/openjdk-11
Using CLASSPATH:       /usr/local/tomcat/bin/bootstrap.jar:/usr/local/tomcat/bin/tomcat-juli.jar
Using CATALINA_OPTS:   
#启动运行
[root@localhost home]# docker run -d -p 3355:8080 --name tomcat01 tomcat:9.0
48e19c70ce022167ea3c69bdbe61195a622f858f63985af01335ddfe1dbc0de4
[root@localhost home]# docker exec -it tomcat01 /bin/bash
root@48e19c70ce02:/usr/local/tomcat# ll
bash: ll: command not found
#发现问题：1、Linux命令少了 2、webapps中没有部署应用。  由于镜像的原因这里的命令是缺少的，默认镜像要保证最小可运行环境的安装，所以有些东西是被剔除掉了
root@48e19c70ce02:/usr/local/tomcat# ls
BUILDING.txt     LICENSE  README.md     RUNNING.txt  conf  logs        temp     webapps.dist
CONTRIBUTING.md  NOTICE   RELEASE-NOTES  bin          lib   native-jni-lib  webapps  work
root@48e19c70ce02:/usr/local/tomcat# cd webapps
root@48e19c70ce02:/usr/local/tomcat/webapps# ls
#这个webapps下面是没有部署任何应用的
root@48e19c70ce02:/usr/local/tomcat/webapps# cd ..
root@48e19c70ce02:/usr/local/tomcat# cd webapps.dist/
root@48e19c70ce02:/usr/local/tomcat/webapps.dist# ls
ROOT  docs  examples  host-manager  manager
root@48e19c70ce02:/usr/local/tomcat/webapps.dist# cd ..
root@48e19c70ce02:/usr/local/tomcat# cp -r webapps.dist/* webapps   #将webapps.dist文件下的拷贝到webapps部署应用
root@48e19c70ce02:/usr/local/tomcat# cd webapps
root@48e19c70ce02:/usr/local/tomcat/webapps# ls
ROOT  docs  examples  host-manager  manager
#这里就部署好了tomcat 映射端口号是3355

思考问题：以后如果需要用docker部署tomcat，然后需要在tomcat上部署我们自己的应用，就需要进入容器，非常的麻烦。
所以还是那个问题。可以在容器外部提供一个映射路径，webapps，我们在外部部署项目，就自动同步到内部就好了！

作业：部署es+kibana

#es 暴露的端口很多！
#es 十分的耗内存
#es 的数据一般需要放置到安全目录！挂载
#docker run -d --name elasticsearch --net somenetwork -p 9200:9200 -p 9300:9300 -e "discovery.type=single-node" elasticsearch:tag
# --net somenetwork  ？ docker网络配置
#启动elasticsearch
docker run -d --name elasticsearch  -p 9200:9200 -p 9300:9300 -e "discovery.type=single-node" elasticsearch:7.6.2
[root@localhost ~]# curl localhost:9200
{
  "name" : "8da72f00f4a3",
  "cluster_name" : "docker-cluster",
  "cluster_uuid" : "8cTmM07VR8ezLtoZUQUw9g",
  "version" : {
    "number" : "7.6.2",
    "build_flavor" : "default",
    "build_type" : "docker",
    "build_hash" : "ef48eb35cf30adf4db14086e8aabd07ef6fb113f",
    "build_date" : "2020-03-26T06:34:37.794943Z",
    "build_snapshot" : false,
    "lucene_version" : "8.4.0",
    "minimum_wire_compatibility_version" : "6.8.0",
    "minimum_index_compatibility_version" : "6.0.0-beta1"
  },
  "tagline" : "You Know, for Search"
}
#此时仅仅es就占用了1.2个G的内存
#使用docker stats 来查看内存 以及cpu的状态
#赶紧关闭，增加内存的限制，修改配置文件  -e 环境配置修改  最小内存64m 最大内存512m
docker run -d --name elasticsearch02  -p 9200:9200 -p 9300:9300 -e "discovery.type=single-node" 
-e ES_JAVA_OPTS="-Xms64m -Xmx512m" elasticsearch:7.6.2
CONTAINER ID   NAME              CPU %     MEM USAGE / LIMIT   MEM %     NET I/O     BLOCK I/O    PIDS
68fd7232219b   elasticsearch02   0.44%     392MiB / 3.685GiB   10.39%    648B / 0B   0B / 696kB   47
^C
[root@localhost ~]# curl localhost:9200
{
  "name" : "68fd7232219b",
  "cluster_name" : "docker-cluster",
  "cluster_uuid" : "P9WkyzOdT564mq2b0_sdAQ",
  "version" : {
    "number" : "7.6.2",
    "build_flavor" : "default",
    "build_type" : "docker",
    "build_hash" : "ef48eb35cf30adf4db14086e8aabd07ef6fb113f",
    "build_date" : "2020-03-26T06:34:37.794943Z",
    "build_snapshot" : false,
    "lucene_version" : "8.4.0",
    "minimum_wire_compatibility_version" : "6.8.0",
    "minimum_index_compatibility_version" : "6.0.0-beta1"
  },
  "tagline" : "You Know, for Search"
}

作业：使用kibana连接es 思考网络如何才能连过去！

可视化

portainer （先用这个） ```shell docker run -d -p 8088:9000 —restart=always -v /var/run/docker.sock:/var/run/docker.sock —privileged=true portainer/portainer


- Rancher （CI/CD再用）
<a name="wurvH"></a>
### 什么是portainer？
docker图形化界面管理工具！提供一个后台面板供我们操作！
```shell
[root@localhost ~]# docker run -d -p 8088:9000 --restart=always -v /var/run/docker.sock:/var/run/docker.sock --privileged=true portainer/portainer
Unable to find image 'portainer/portainer:latest' locally
latest: Pulling from portainer/portainer
94cfa856b2b1: Pull complete 
49d59ee0881a: Pull complete 
a2300fd28637: Pull complete 
Digest: sha256:fb45b43738646048a0a0cc74fcee2865b69efde857e710126084ee5de9be0f3f
Status: Downloaded newer image for portainer/portainer:latest
6fd8a8735359499d8d0bc0990fd636a963653242fd781055a2c3ec6adb1e1ae2

访问外网测试：ip：192.168.150.131:8088

进入之后选择本地

Docker安装MySQL

docker run -itd --name mysql-test -p 3306:3306 -e MYSQL_ROOT_PASSWORD=123456 mysql

作业练习

作业：Docker安装Nginx

作业：部署Tomcat

作业：部署es+kibana

可视化

Docker安装MySQL