【Docker学习笔记 三】Docker常用容器安装及图形化管理工具(下)

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简介: 【Docker学习笔记 三】Docker常用容器安装及图形化管理工具(下)

ElasticSearch部署

ElasticSearch是我们常用的搜索引擎,es暴露端口较多且占用内存较高

1 搜索并下载镜像

先搜索并下载elasticsearch的镜像

[root@192 ~]# docker search elasticsearch
NAME                                               DESCRIPTION                                     STARS     OFFICIAL   AUTOMATED
elastichq/elasticsearch-hq                         Official Docker image for ElasticHQ: Elastic…   78                   [OK]
bitnami/elasticsearch                              Bitnami Docker Image for Elasticsearch          47                   [OK]
justwatch/elasticsearch_exporter                   Elasticsearch stats exporter for Prometheus     17                   
bitnami/elasticsearch-exporter                     Bitnami Elasticsearch Exporter Docker Image     4                    [OK]
barchart/elasticsearch-aws                         Elasticsearch AWS node                          3                    
rancher/elasticsearch-conf                                                                         3                    
bitnami/elasticsearch-curator                                                                      2                    
ibmcom/elasticsearch                               Docker Image for IBM Cloud private-CE (Commu…   1                    
ibmcom/elasticsearch-ppc64le                       Docker Image for IBM Cloud Private-CE (Commu…   1                    
rancher/elasticsearch-bootstrap                                                                    1                    
ibmcom/elasticsearch-s390x                                                                         1                    
atlassian/dynamodb-elasticsearch-indexer           An indexer for indexing DynamoDB tables in E…   1                    
ibmcom/elasticsearch-amd64                                                                         0                    
ibmcom/elasticsearch-exporter-amd64                                                                0                    
ibmcom/elasticsearch-plugin-searchguard-amd64                                                      0                    
ibmcom/elasticsearch-exporter-ppc64le                                                              0                    
ibmcom/elasticsearch-plugin-searchguard-s390x                                                      0                    
ibmcom/elasticsearch-exporter-s390x                                                                0                    
ibmcom/elasticsearch-plugin-searchguard-ppc64le                                                    0                    
ibmcom/elasticsearch-dump                                                                          0                    
rancher/elasticsearch                                                                              0                    
amazon/opendistro-for-elasticsearch-data-prepper   The Docker image for the Open Distribution f…   0                    
ibmcom/elasticsearch-exporter                                                                      0                    
ibmcom/elasticsearch-plugin-searchguard                                                            0                    
kibana                                             Kibana gives shape to any kind of data — str…   0         [OK]       
[root@192 ~]# docker pull elasticsearch
Using default tag: latest
latest: Pulling from library/elasticsearch
05d1a5232b46: Pull complete 
5cee356eda6b: Pull complete 
89d3385f0fd3: Pull complete 
65dd87f6620b: Pull complete 
78a183a01190: Pull complete 
1a4499c85f97: Pull complete 
2c9d39b4bfc1: Pull complete 
1b1cec2222c9: Pull complete 
59ff4ce9df68: Pull complete 
1976bc3ee432: Pull complete 
5af49e8af381: Pull complete 
42c8b75ff7af: Pull complete 
7e6902915254: Pull complete 
99853874fa54: Pull complete 
596fbad6fcff: Pull complete 
Digest: sha256:a8081d995ef3443dc6d077093172a5931e02cdb8ffddbf05c67e01d348a9770e
Status: Downloaded newer image for elasticsearch:latest
docker.io/library/elasticsearch:latest
[root@192 ~]# docker images
REPOSITORY      TAG       IMAGE ID       CREATED        SIZE
nginx           latest    605c77e624dd   7 weeks ago    141MB
tomcat          latest    fb5657adc892   8 weeks ago    680MB
mysql           latest    3218b38490ce   2 months ago   516MB
hello-world     latest    feb5d9fea6a5   4 months ago   13.3kB
centos          latest    5d0da3dc9764   5 months ago   231MB
elasticsearch   latest    5acf0e8da90b   3 years ago    486MB
[root@192 ~]#

添加 -e ES_JAVA_OPTS="-Xms128m -Xmx512m" 配置ElasticSearch的虚拟机占用的内存大小

2 运行测试

给es设定最大内存进行启动

[root@192 ~]# docker run -d --name elasticsearch-tml -p 3392:9200 -p 3393:9300 -e "discovery.type=single-node" -e ES_JAVA_OPTS="-Xms128m -Xmx512m" elasticsearch
bd6877cd46cebf68c2f9b0571dafde1da474c159b28939d9a24faabe21a86802
[root@192 ~]# docker ps
CONTAINER ID   IMAGE           COMMAND                  CREATED          STATUS          PORTS                                                                                  NAMES
bd6877cd46ce   elasticsearch   "/docker-entrypoint.…"   13 seconds ago   Up 12 seconds   0.0.0.0:3392->9200/tcp, :::3392->9200/tcp, 0.0.0.0:3393->9300/tcp, :::3393->9300/tcp   elasticsearch-tml
2f59536a92da   tomcat          "catalina.sh run"        2 hours ago      Up 2 hours      0.0.0.0:3335->8080/tcp, :::3335->8080/tcp                                              tomcat-tml
b8ae778bad8c   nginx           "/docker-entrypoint.…"   2 hours ago      Up 2 hours      0.0.0.0:3334->80/tcp, :::3334->80/tcp                                                  nginx-tml
4ed9be7f96c8   centos          "/bin/bash"              2 weeks ago      Up 2 weeks                                                                                             inspiring_rhodes
cc886973b2cb   centos          "/bin/sh -c 'while t…"   2 weeks ago      Up 2 weeks

通过命令stats查看内存使用情况:

[root@192 ~]# docker stats bd6877cd46ce
CONTAINER ID   NAME                CPU %     MEM USAGE / LIMIT     MEM %     NET I/O     BLOCK I/O       PIDS
bd6877cd46ce   elasticsearch-tml   0.02%     184.2MiB / 972.4MiB   18.94%    656B / 0B   941MB / 537kB   31
CONTAINER ID   NAME                CPU %     MEM USAGE / LIMIT     MEM %     NET I/O     BLOCK I/O       PIDS
bd6877cd46ce   elasticsearch-tml   0.02%     184.2MiB / 972.4MiB   18.94%    656B / 0B   941MB / 537kB   31
CONTAINER ID   NAME                CPU %     MEM USAGE / LIMIT     MEM %     NET I/O     BLOCK I/O       PIDS
bd6877cd46ce   elasticsearch-tml   0.80%     184.7MiB / 972.4MiB   18.99%    656B / 0B   948MB / 537kB   31
CONTAINER ID   NAME                CPU %     MEM USAGE / LIMIT     MEM %     NET I/O     BLOCK I/O       PIDS
bd6877cd46ce   elasticsearch-tml   0.80%     184.7MiB / 972.4MiB   18.99%    656B / 0B   948MB / 537kB   31
CONTAINER ID   NAME                CPU %     MEM USAGE / LIMIT     MEM %     NET I/O     BLOCK I/O       PIDS

3 访问测试

我们进行访问测试看下效果:

[root@192 ~]# curl localhost:3392
{
  "name" : "xcQQz-u",
  "cluster_name" : "elasticsearch",
  "cluster_uuid" : "D5CjYDPoQvOzarlg-GY0nQ",
  "version" : {
    "number" : "5.6.12",
    "build_hash" : "cfe3d9f",
    "build_date" : "2018-09-10T20:12:43.732Z",
    "build_snapshot" : false,
    "lucene_version" : "6.6.1"
  },
  "tagline" : "You Know, for Search"
}
[root@192 ~]#

公网访问效果如下:

当然也可以部署新版本es并访问,很简单:

[root@192 ~]# docker run -d --name elasticsearch-tml-7.6.2 -p 3396:9200 -p 3397:9300 -e "discovery.type=single-node" -e ES_JAVA_OPTS="-Xms128m -Xmx512m" elasticsearch:7.6.2
Unable to find image 'elasticsearch:7.6.2' locally
7.6.2: Pulling from library/elasticsearch
ab5ef0e58194: Pull complete 
c4d1ca5c8a25: Pull complete 
941a3cc8e7b8: Pull complete 
43ec483d9618: Pull complete 
c486fd200684: Pull complete 
1b960df074b2: Pull complete 
1719d48d6823: Pull complete 
Digest: sha256:1b09dbd93085a1e7bca34830e77d2981521a7210e11f11eda997add1c12711fa
Status: Downloaded newer image for elasticsearch:7.6.2
3b66fa35905f90af7d8ddfb37b457f31d9045a9ffebc2f1c9e99c7d0374bae01
[root@192 ~]# docker ps
CONTAINER ID   IMAGE                 COMMAND                  CREATED          STATUS         PORTS                                                                                  NAMES
3b66fa35905f   elasticsearch:7.6.2   "/usr/local/bin/dock…"   14 seconds ago   Up 8 seconds   0.0.0.0:3396->9200/tcp, :::3396->9200/tcp, 0.0.0.0:3397->9300/tcp, :::3397->9300/tcp   elasticsearch-tml-7.6.2
bd6877cd46ce   elasticsearch         "/docker-entrypoint.…"   7 minutes ago    Up 7 minutes   0.0.0.0:3392->9200/tcp, :::3392->9200/tcp, 0.0.0.0:3393->9300/tcp, :::3393->9300/tcp   elasticsearch-tml
2f59536a92da   tomcat                "catalina.sh run"        2 hours ago      Up 2 hours     0.0.0.0:3335->8080/tcp, :::3335->8080/tcp                                              tomcat-tml
b8ae778bad8c   nginx                 "/docker-entrypoint.…"   2 hours ago      Up 2 hours     0.0.0.0:3334->80/tcp, :::3334->80/tcp                                                  nginx-tml
4ed9be7f96c8   centos                "/bin/bash"              2 weeks ago      Up 2 weeks                                                                                            inspiring_rhodes
cc886973b2cb   centos                "/bin/sh -c 'while t…"   2 weeks ago      Up 2 weeks                                                                                            suspicious_borg
[root@192 ~]# docker images
REPOSITORY      TAG       IMAGE ID       CREATED         SIZE
nginx           latest    605c77e624dd   7 weeks ago     141MB
tomcat          latest    fb5657adc892   8 weeks ago     680MB
mysql           latest    3218b38490ce   2 months ago    516MB
hello-world     latest    feb5d9fea6a5   4 months ago    13.3kB
centos          latest    5d0da3dc9764   5 months ago    231MB
elasticsearch   7.6.2     f29a1ee41030   23 months ago   791MB
elasticsearch   latest    5acf0e8da90b   3 years ago     486MB

公网访问如下:

MySQL部署

MySQL是我们的常用的数据库管理软件:

1 搜索并下载镜像

同样的搜索和下载镜像:

[root@192 ~]# docker search mysql
NAME                             DESCRIPTION                                     STARS     OFFICIAL   AUTOMATED
mysql/mysql-server               Optimized MySQL Server Docker images. Create…   905                  [OK]
centos/mysql-57-centos7          MySQL 5.7 SQL database server                   92                   
mysql/mysql-cluster              Experimental MySQL Cluster Docker images. Cr…   92                   
bitnami/mysql                    Bitnami MySQL Docker Image                      65                   [OK]
circleci/mysql                   MySQL is a widely used, open-source relation…   24                   
ubuntu/mysql                     MySQL open source fast, stable, multi-thread…   23                   
mysql/mysql-router               MySQL Router provides transparent routing be…   23                   
centos/mysql-56-centos7          MySQL 5.6 SQL database server                   21                   
google/mysql                     MySQL server for Google Compute Engine          19                   [OK]
mysqlboy/mydumper                mydumper for mysql logcial backups              3                    
mysqlboy/docker-mydumper         docker-mydumper containerizes MySQL logical …   3                    
ibmcom/mysql-s390x               Docker image for mysql-s390x                    1                    
bitnami/mysqld-exporter                                                          1                    
mysql                            MySQL is a widely used, open-source relation…   0         [OK]       
ibmcom/tidb-ppc64le              TiDB is a distributed NewSQL database compat…   0                    
mirantis/mysql                                                                   0                    
mysql/mysql-operator             MySQL Operator for Kubernetes                   0                    
cimg/mysql                                                                       0                    
phpmyadmin                       phpMyAdmin - A web interface for MySQL and M…   0         [OK]       
mysqlboy/elasticsearch                                                           0                    
mysqleatmydata/mysql-eatmydata                                                   0                    
percona                          Percona Server is a fork of the MySQL relati…   0         [OK]       
mysqled25519/mysqled25519                                                        0                    
mariadb                          MariaDB Server is a high performing open sou…   0         [OK]       
mysql/ndb-operator               MySQL NDB Operator for Kubernetes               0                    
[root@192 ~]# docker pull mysql
Using default tag: latest
latest: Pulling from library/mysql
Digest: sha256:e9027fe4d91c0153429607251656806cc784e914937271037f7738bd5b8e7709
Status: Image is up to date for mysql:latest
docker.io/library/mysql:latest
[root@192 ~]# docker images
REPOSITORY      TAG       IMAGE ID       CREATED         SIZE
nginx           latest    605c77e624dd   7 weeks ago     141MB
tomcat          latest    fb5657adc892   8 weeks ago     680MB
mysql           latest    3218b38490ce   2 months ago    516MB
hello-world     latest    feb5d9fea6a5   4 months ago    13.3kB
centos          latest    5d0da3dc9764   5 months ago    231MB
elasticsearch   7.6.2     f29a1ee41030   23 months ago   791MB
elasticsearch   latest    5acf0e8da90b   3 years ago     486MB
[root@192 ~]#

2 运行测试

运行启动mysql并设置账户密码:

[root@192 ~]# docker run -d --name mysql-tml -p 3366:3306 -e MYSQL_ROOT_PASSWORD=123456 mysql
b7842800b1cb46a7a79e01531d1e706fd4e54f8a6edadd07c8c32bd3abb41233
[root@192 ~]# docker ps
CONTAINER ID   IMAGE                 COMMAND                  CREATED          STATUS          PORTS                                                                                  NAMES
b7842800b1cb   mysql                 "docker-entrypoint.s…"   4 seconds ago    Up 3 seconds    33060/tcp, 0.0.0.0:3366->3306/tcp, :::3366->3306/tcp                                   mysql-tml
3b66fa35905f   elasticsearch:7.6.2   "/usr/local/bin/dock…"   6 minutes ago    Up 6 minutes    0.0.0.0:3396->9200/tcp, :::3396->9200/tcp, 0.0.0.0:3397->9300/tcp, :::3397->9300/tcp   elasticsearch-tml-7.6.2
bd6877cd46ce   elasticsearch         "/docker-entrypoint.…"   13 minutes ago   Up 13 minutes   0.0.0.0:3392->9200/tcp, :::3392->9200/tcp, 0.0.0.0:3393->9300/tcp, :::3393->9300/tcp   elasticsearch-tml
2f59536a92da   tomcat                "catalina.sh run"        2 hours ago      Up 2 hours      0.0.0.0:3335->8080/tcp, :::3335->8080/tcp                                              tomcat-tml
b8ae778bad8c   nginx                 "/docker-entrypoint.…"   2 hours ago      Up 2 hours      0.0.0.0:3334->80/tcp, :::3334->80/tcp                                                  nginx-tml
4ed9be7f96c8   centos                "/bin/bash"              2 weeks ago      Up 2 weeks                                                                                             inspiring_rhodes
cc886973b2cb   centos                "/bin/sh -c 'while t…"   2 weeks ago      Up 2 weeks                                                                                             suspicious_borg
[root@192 ~]#

运行命令说明:

-p 3306:3306 :映射容器服务的 3306 端口到宿主机的 3306 端口,外部主机可以直接通过 宿主机ip:3306 访问到 MySQL 的服务。
MYSQL_ROOT_PASSWORD=123456:设置 MySQL 服务 默认账号root 用户的密码。

3 访问测试

进入容器,并通过账号root查看MySQL服务能否正常连接

[root@192 ~]# docker exec -it b7842800b1cb /bin/bash
root@b7842800b1cb:/# mysql -h localhost -u root -p
Enter password: 
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 8
Server version: 8.0.27 MySQL Community Server - GPL
Copyright (c) 2000, 2021, Oracle and/or its affiliates.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql>

Portaniner工具安装

Portaniner是Docker的图形化管理工具,类似的工具还有Rancher(CI/CD再用),使用时下载运行Portaniner镜像并运行,设置本机映射端口为8088,一键拉取镜像并运行容器

[root@192 ~]# 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
78664208a245f44dd9cb9ea7c1fb8418431a7c36affb7e0dcfd110d21ce95196
[root@192 ~]# docker ps
CONTAINER ID   IMAGE                 COMMAND                  CREATED          STATUS          PORTS                                                                                  NAMES
78664208a245   portainer/portainer   "/portainer"             13 seconds ago   Up 12 seconds   0.0.0.0:8088->9000/tcp, :::8088->9000/tcp                                              thirsty_gauss
b7842800b1cb   mysql                 "docker-entrypoint.s…"   5 minutes ago    Up 5 minutes    33060/tcp, 0.0.0.0:3366->3306/tcp, :::3366->3306/tcp                                   mysql-tml
3b66fa35905f   elasticsearch:7.6.2   "/usr/local/bin/dock…"   11 minutes ago   Up 11 minutes   0.0.0.0:3396->9200/tcp, :::3396->9200/tcp, 0.0.0.0:3397->9300/tcp, :::3397->9300/tcp   elasticsearch-tml-7.6.2
bd6877cd46ce   elasticsearch         "/docker-entrypoint.…"   18 minutes ago   Up 18 minutes   0.0.0.0:3392->9200/tcp, :::3392->9200/tcp, 0.0.0.0:3393->9300/tcp, :::3393->9300/tcp   elasticsearch-tml
2f59536a92da   tomcat                "catalina.sh run"        2 hours ago      Up 2 hours      0.0.0.0:3335->8080/tcp, :::3335->8080/tcp                                              tomcat-tml
b8ae778bad8c   nginx                 "/docker-entrypoint.…"   3 hours ago      Up 3 hours      0.0.0.0:3334->80/tcp, :::3334->80/tcp                                                  nginx-tml
4ed9be7f96c8   centos                "/bin/bash"              2 weeks ago      Up 2 weeks                                                                                             inspiring_rhodes
cc886973b2cb   centos                "/bin/sh -c 'while t…"   2 weeks ago      Up 2 weeks                                                                                             suspicious_borg
[root@192 ~]#

第一次登录设置admin用户的密码:

登录后选择本地连接:

进入就可以看到自己的镜像和容器了:

以及我们刚开启的容器服务:

总结一下

经过之前的命令学习,今天这篇Blog主要是拿几个容器练手来熟悉之前的docker命令、进行一些简单的请求测试,并且通过工具面板可视化的去管理容器。到此为止,学习到的Docker容器的应用概念还是停留在单个组件的功能实现上,大型的分布式服务集群其实是融合了多种中间件去实现的,这到底是如何实现的,容器如何联合起来提供服务,还是比较好奇?所以还是比较期待后续容器编排一些高级概念的学习。

相关实践学习
使用阿里云Elasticsearch体验信息检索加速
通过创建登录阿里云Elasticsearch集群,使用DataWorks将MySQL数据同步至Elasticsearch,体验多条件检索效果,简单展示数据同步和信息检索加速的过程和操作。
ElasticSearch 入门精讲
ElasticSearch是一个开源的、基于Lucene的、分布式、高扩展、高实时的搜索与数据分析引擎。根据DB-Engines的排名显示,Elasticsearch是最受欢迎的企业搜索引擎,其次是Apache Solr(也是基于Lucene)。 ElasticSearch的实现原理主要分为以下几个步骤: 用户将数据提交到Elastic Search 数据库中 通过分词控制器去将对应的语句分词,将其权重和分词结果一并存入数据 当用户搜索数据时候,再根据权重将结果排名、打分 将返回结果呈现给用户 Elasticsearch可以用于搜索各种文档。它提供可扩展的搜索,具有接近实时的搜索,并支持多租户。
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