Docker入门第六章
部署Nginx
#1.搜索镜像 search 建议大家去docker搜索,可以看到帮助文档
#2.下载镜像 pull
#3.运行测试
[root@localhost ~]# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
nginx latest 08b152afcfae 3 weeks ago 133MB
centos latest 300e315adb2f 8 months ago 209MB
# -d 后台运行
# --name 给容器命名
# -p 宿主机端口,容器内部端口
[root@localhost ~]# docker run -d --name nginx01 -p 3344:80 nginx
98fe864057ca7582ada2fc6b0b6f0fa3c40416481fb6ad7663931916315e84be
[root@localhost ~]# docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
98fe864057ca nginx "/docker-entrypoint.…" 13 seconds ago Up 6 seconds 0.0.0.0:3344->80/tcp, :::3344->80/tcp nginx01
[root@localhost ~]# curl localhost:3344
#进入容器
[root@localhost ~]# docker exec -it nginx01 /bin/bash
root@98fe864057ca:/# whereis nginx
nginx: /usr/sbin/nginx /usr/lib/nginx /etc/nginx /usr/share/nginx
root@98fe864057ca:/# cd /etc/nginx/
root@98fe864057ca:/etc/nginx# ls
conf.d fastcgi_params mime.types modules nginx.conf scgi_params uwsgi_params
部署Tomcat
#官方的使用
docker run -it --rm tomcat:9.0
#我们之前的启动都是后台,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
#下载再启动
docker pull tomcat
#启动运行
docker run -d -p 3355:8080 --name tomcat01 tomcat
#测试访问没有问题
#进入容器
[root@localhost ~]# docker exec -it tomcat01 /bin/bash
#发现问题:
# 1.linux命令少了,2.webapps没有文件,阿里云镜像的原因,默认是最小的镜像,所有不必要的都剔除掉
# 保证最小可运行环境
部署ES+Kibana
# es 暴露的端口很多!
# es 十分的耗内存
# es 的数据一啊不能需要放置到安全目录!挂载
# --net somenetwork 是网络配置
docker run -d --name elasticsearch --net somenetwork -p 9200:9200 -p 9300:9300 -e "discovery.type=single-node" elasticsearch:tag
#启动 elaticsearch
docker run -d --name elasticsearch -p 9200:9200 -p 9300:9300 -e "discovery.type=single-node" elasticsearch:7.6.2
#测试一下es是否成功
[root@localhost ~]# curl localhost:9200
{
"name" : "566b9cc477be",
"cluster_name" : "docker-cluster",
"cluster_uuid" : "IAy-Zq6LTqa2dhC8LLCBSA",
"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"
}
#docker stats 查看cpu的状态
可以看到我的虚拟机是1G内存,这个ElasticSearch占用了我545.6M,相当于占用了我56.11%的内存,我们可以对ES增加内存的限制,修改配置文件,
我们可以通过-e参数进行环境配置的修改,先关闭掉elasticsearch
#关闭掉刚刚启动的ElasticSearch
[root@localhost ~]# docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
566b9cc477be elasticsearch:7.6.2 "/usr/local/bin/dock…" 37 minutes ago Up 36 minutes 0.0.0.0:9200->9200/tcp, :::9200->9200/tcp, 0.0.0.0:9300->9300/tcp, :::9300->9300/tcp elasticsearch
[root@localhost ~]# docker stop 566b9cc477be
#重新运行一个ElasticSearch实例
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
#启动成功之后查看是否能够正常访问
[root@localhost ~]# curl localhost:9200
{
"name" : "9ca8bdf59d48",
"cluster_name" : "docker-cluster",
"cluster_uuid" : "xgzM52tdTRyF-xqCzuPdBg",
"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"
}
然后再看一下内存占用的情况docker stats
可以看到此时占用内存才399M,依然正常访问成功
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作者:吕世昊
个性签名:学习如逆水行舟,不进则退!
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