练习：docker部署

Posted 2023-04-04 by1314

部署nginx

1. 搜索镜像（最好取hub官网搜索一下）--search
2. 拉取下载镜像--pull
3. 使用后台运行，并起名字，-p 宿主机端口：容器内部端口

[root@bytest01 ~]#  docker search nginx
NAME                                              DESCRIPTION                                     STARS               OFFICIAL            AUTOMATED
nginx                                             Official build of Nginx.                        18336               [OK]
linuxserver/nginx                                 An Nginx container, brought to you by LinuxS…   188
bitnami/nginx                                     Bitnami nginx Docker Image                      155                                     [OK]
ubuntu/nginx                                      Nginx, a high-performance reverse proxy & we…   84
privatebin/nginx-fpm-alpine                       PrivateBin running on an Nginx, php-fpm & Al…   72                                      [OK]
bitnami/nginx-ingress-controller                  Bitnami Docker Image for NGINX Ingress Contr…   23                                      [OK]
rancher/nginx-ingress-controller                                                                  11
kasmweb/nginx                                     An Nginx image based off nginx:alpine and in…   4
ibmcom/nginx-ingress-controller                   Docker Image for IBM Cloud Private-CE (Commu…   4
bitnami/nginx-ldap-auth-daemon                                                                    3
bitnami/nginx-exporter                                                                            3
rapidfort/nginx                                   RapidFort optimized, hardened image for NGINX   3
circleci/nginx                                    This image is for internal use                  2
rancher/nginx                                                                                     2
rancher/nginx-ingress-controller-defaultbackend                                                   2
vmware/nginx                                                                                      2
bitnami/nginx-intel                                                                               1
rapidfort/nginx-official                          RapidFort optimized, hardened image for NGIN…   1
vmware/nginx-photon                                                                               1
rancher/nginx-conf                                                                                0
ibmcom/nginx-ppc64le                              Docker image for nginx-ppc64le                  0
ibmcom/nginx-ingress-controller-ppc64le           Docker Image for IBM Cloud Private-CE (Commu…   0
rancher/nginx-ssl                                                                                 0
rapidfort/nginx-ib                                RapidFort optimized, hardened image for NGIN…   0
continuumio/nginx-ingress-ws                                                                      0
[root@bytest01 ~]#  docker pull nginx
Using default tag: latest
latest: Pulling from library/nginx
a2abf6c4d29d: Pull complete
a9edb18cadd1: Pull complete
589b7251471a: Pull complete
186b1aaa4aa6: Pull complete
b4df32aa5a72: Pull complete
a0bcbecc962e: Pull complete
Digest: sha256:0d17b565c37bcbd895e9d92315a05c1c3c9a29f762b011a10c54a66cd53c9b31
Status: Downloaded newer image for nginx:latest
docker.io/library/nginx:latest
[root@bytest01 ~]#  docker images
REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE
nginx               latest              605c77e624dd        15 months ago       141MB
centos              6                   5bf9684f4720        18 months ago       194MB
centos              latest              5d0da3dc9764        18 months ago       231MB                                                                                         
[root@bytest01 ~]#  docker run -d --name nginx01 -p 3344:80 nginx
e04554f7a734e198df6fe61fb64ad040255e354372b9c6f923f5a5eff5485f31
[root@bytest01 ~]#
[root@bytest01 ~]#  docker ps
CONTAINER ID        IMAGE               COMMAND                  CREATED                                                                                                                   STATUS              PORTS                  NAMES
e04554f7a734        nginx               "/docker-entrypoint.…"   8 seconds ago                                                                                                             Up 5 seconds        0.0.0.0:3344->80/tcp   nginx01
[root@bytest01 ~]#  curl localhost:3344
<!DOCTYPE html>
<html>
<head>
<title>Welcome to nginx!</title>
<style>
html  color-scheme: light dark; 
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>

上面我们实现了在容器内部已经容器外部一个端口的映射，我们可以通过外网来进行访问

问题：如果我们要修改 nginx 配置文件都需要进入容器内部十分麻烦，我们可以在容器恩爱不提供一个映射路径，可以达到在容器外修改文件名，内部自动修改？
-v数据卷技术

部署 tomcat

docker run -it --rm tomcat:9.0 #之前的启动都是后台的，停止容器还是可以查到，官方写法用完就删通用于测试
docker pull tomcat:9.0
docker run -d --name tomcat01 -p 9000:80 tomcat
docker exec -it tomcat01 /bin/bash #进入容器
问题：发现linux命令减少，阿里云镜像获取最小镜像，能删的都删了

部署 es

• es 暴露的端口很多
• es 需要放到安全目录中，挂载
• es 很费内存

--net somenetwork ？ 网络配置

docker run -d --name elasticsearch -p 9200:9200 -p 9300:9300 -e "discovery.type=single-node" elasticsearch:8.6.2

使用 docker stats 查看 cpu状态

docker stats
增加内存限制通过-e 环境修改配置
docker run -d --name elasticsearch -p 9200:9200 -p 9300:9300 -e "discovery.type=single-node" -e ES_JAVA_OPTS="-Xms64m -Xms512m" elasticsearch:8.6.2 #最大内存512MB

如何使用 kibana 去连接 es?

哪有什么胜利可言，坚持意味着一切。如想使用请备注转载链接~

docker部署nginx,tomcat 练习

docker部署nginx步骤

1. docker pull nginx
2. docker run -d --name nginx01 -p 3344:80 nginx #设置端口映射,暴露到公网
3. 使用curl localhost:3344 进行测试 ,会跳出nginx欢迎界面说明跑起来成功了

拓扑图如下:

思考:弊端是每次需要在运行到容器里进行部署,比较麻烦,是否可以容器外部提供映射路径,镜像里改,容器里也自动修改??
其实是可以的,后期需要用到 -v 数据卷的技术.

docker部署tomcat步骤

步骤同上,略,我们会发现这个容器部署好后,tomcat无法访问.
因为阿里的镜像有些事阉割版,把非必要部分都去除了.但是可以发现tomcat下的webapps.dist里有网页部署测试文件,
把这里的文件复制到webapps下, cp webapps.dist/* -r webapps/
就可以访问了