docker文件存放路径, 获取容器启动命令操作
容器早已创建好，如何得知它的启动参数（数据挂载到哪）
#假设通过如下命令启动了一个容器
dockerrun-d--namemysql\
-p3306:3306\
-eMYSQL_ROOT_PASSWORD=123456\
--restart=always\
mysql:5.5--character-set-server=utf8
#如何通过容器名得知启动参数
[root@jenkins~]#dockerinspectmysql_cdh
[
{
"Id":"fbc3fba81b57bc5b5871746098b5f1f7ef0ed7716a786584a5effbb88ba156e6",
"Created":"2019-09-25T01:43:37.720505875Z",
"Path":"docker-entrypoint.sh",
"Args":[
"--character-set-server=utf8"
],
"HostConfig":{
"Binds":[
"mysql-data:/var/lib/mysql"
],
"ContainerIDFile":"",
"LogConfig":{
"Type":"json-file",
"Config":{}
},
"NetworkMode":"default",
"PortBindings":{
"3306/tcp":[{"HostIp":"","HostPort":"3306"}
]
},
"RestartPolicy":{
"Name":"always",
"MaximumRetryCount":0
},
"Mounts":[
{
"Type":"volume",
"Name":"mysql-data",
"Source":"/var/lib/docker/volumes/mysql-data/_data",
"Destination":"/var/lib/mysql",
"Driver":"local",
"Mode":"z",
"RW":true,
"Propagation":""
}
],
1,镜像层：文件存放路径
[root@master~]#dockerimageinspectnginx|tail-n22
"GraphDriver":{
"Data":{
"LowerDir":"/var/lib/docker/overlay2/bf20cf788cc053f00ff1467525d50e19bd1cf07a2167f72511bdfcb28918a472/diff:/var/lib/docker/overlay2/317d80bb7ae58ed288be9ebd84aeb5b4b3a1c06f3211f5d1f32d89b629d1876e/diff",
"MergedDir":"/var/lib/docker/overlay2/7782d0eb292fdc8bbd73bf9bae2d65468e8aba0bcd6baed55ac348618b80ae16/merged",
"UpperDir":"/var/lib/docker/overlay2/7782d0eb292fdc8bbd73bf9bae2d65468e8aba0bcd6baed55ac348618b80ae16/diff",
"WorkDir":"/var/lib/docker/overlay2/7782d0eb292fdc8bbd73bf9bae2d65468e8aba0bcd6baed55ac348618b80ae16/work"
},
"Name":"overlay2"
},
2,容器层：文件存放路径
#1,启动容器 [root@master~]#dockerrun-d--namenginx2nginx a9c9f31cdccf13c3385f3de33443325d2e14d69458e6d679e54c8cf9e5ff24c8 #2,获取容器id [root@master~]#dockerinspectnginx2|grep-iid [root@master~]#dockerinspectnginx2|grep-iid "Id":"a9c9f31cdccf13c3385f3de33443325d2e14d69458e6d679e54c8cf9e5ff24c8", "Pid":2069, "ExecIDs":null, "ContainerIDFile":"", #查看容器临时文件--每次创建时随机生成的文件(容器层) [root@master~]#dockerinspectnginx2|grep-ipath "Path":"nginx", "ResolvConfPath":"/var/lib/docker/containers/a9c9f31cdccf13c3385f3de33443325d2e14d69458e6d679e54c8cf9e5ff24c8/resolv.conf", "HostnamePath":"/var/lib/docker/containers/a9c9f31cdccf13c3385f3de33443325d2e14d69458e6d679e54c8cf9e5ff24c8/hostname", "HostsPath":"/var/lib/docker/containers/a9c9f31cdccf13c3385f3de33443325d2e14d69458e6d679e54c8cf9e5ff24c8/hosts", "LogPath":"/var/lib/docker/containers/a9c9f31cdccf13c3385f3de33443325d2e14d69458e6d679e54c8cf9e5ff24c8/a9c9f31cdccf13c3385f3de33443325d2e14d69458e6d679e54c8cf9e5ff24c8-json.log", #通过容器id,查找容器数据存放目录：/var/lib/docker/overlay2/容器id ###### #对比上面的“镜像层：文件存放路径”，可以看到:容器通过LowerDir挂载的方式，映射了镜像层的文件 ###### [root@master~]#dockerinspectnginx2|grep-idir "LowerDir":"/var/lib/docker/overlay2/d37ff828e63081be6fcfefc73891e7b455596cb921c8021fbf9571f330c0599b-init/diff:/var/lib/docker/overlay2/7782d0eb292fdc8bbd73bf9bae2d65468e8aba0bcd6baed55ac348618b80ae16/diff:/var/lib/docker/overlay2/bf20cf788cc053f00ff1467525d50e19bd1cf07a2167f72511bdfcb28918a472/diff:/var/lib/docker/overlay2/317d80bb7ae58ed288be9ebd84aeb5b4b3a1c06f3211f5d1f32d89b629d1876e/diff", "MergedDir":"/var/lib/docker/overlay2/d37ff828e63081be6fcfefc73891e7b455596cb921c8021fbf9571f330c0599b/merged", "UpperDir":"/var/lib/docker/overlay2/d37ff828e63081be6fcfefc73891e7b455596cb921c8021fbf9571f330c0599b/diff", "WorkDir":"/var/lib/docker/overlay2/d37ff828e63081be6fcfefc73891e7b455596cb921c8021fbf9571f330c0599b/work"
后天修改容器端口
通过容器层文件，找到配置文件hostconfig.json，修改容器映射的端口
[root@dockerd93185e3a0....2e544ccfa]#pwd
/var/lib/docker/containers/d93185e3a0....2e544ccfa
[root@dockerd93185e3a0....2e544ccfa]#cathostconfig.json
{"Binds":["/dockersuperset:/home/superset"],"ContainerIDFile":"",
"LogConfig":{"Type":"json-file","Config":{}},"NetworkMode":"default",
"PortBindings":{"8088/tcp":[{"HostIp":"","HostPort":"8099"}]}......
3,进入镜容器文件存储目录，修改配置文件
#进入镜容器文件存储目录，修改配置文件 [root@master~]#cd/var/lib/docker/overlay2/d37ff828e63081be6fcfefc73891e7b455596cb921c8021fbf9571f330c0599b [root@masterd37ff828e63081be6fcfefc73891e7b455596cb921c8021fbf9571f330c0599b]#ls difflinklowermergedwork [root@masterd37ff828e63081be6fcfefc73891e7b455596cb921c8021fbf9571f330c0599b]#lsdiff/run/ nginx.pid [root@masterd37ff828e63081be6fcfefc73891e7b455596cb921c8021fbf9571f330c0599b]#lsdiff/var/cache/nginx/ client_tempfastcgi_tempproxy_tempscgi_tempuwsgi_temp [root@masterd37ff828e63081be6fcfefc73891e7b455596cb921c8021fbf9571f330c0599b]#lsmerged/ bin/dev/etc/lib/media/opt/root/sbin/sys/usr/ boot/.dockerenvhome/lib64/mnt/proc/run/srv/tmp/var/ [root@masterd37ff828e63081be6fcfefc73891e7b455596cb921c8021fbf9571f330c0599b]#lsmerged/etc/nginx/ conf.dfastcgi_paramskoi-utfkoi-winmime.typesmodulesnginx.confscgi_paramsuwsgi_paramswin-utf [root@masterd37ff828e63081be6fcfefc73891e7b455596cb921c8021fbf9571f330c0599b]#headmerged/etc/nginx/nginx.conf usernginx; worker_processes1; #在此处修改配置文件，把usernginx;worker_process1;这两行的分号去掉，看容器里面的配置是否更改 [root@masterd37ff828e63081be6fcfefc73891e7b455596cb921c8021fbf9571f330c0599b]#headmerged/etc/nginx/nginx.conf-n3 usernginx worker_processes1 #登陆容器，查看修改的配置：验证是否生效 [root@masterd37ff828e63081be6fcfefc73891e7b455596cb921c8021fbf9571f330c0599b]#dockerexec-itnginx2bash root@a9c9f31cdccf:/#head/etc/nginx/nginx.conf-n3 usernginx worker_processes1
4,修改默认存储路径
a,重建/var/lib/docker目录 #备份数据到新的存放路径 servicedockerstop mkdir/docker.bak mv/var/lib/docker/*/docker.bak #创建软连接 mkdir/home/docker-data mv/docker.bak/*/home/docker-data/&&rmdir/docker.bak ln-s/home/docker-data/var/lib/docker b,修改配置 vi/usr/lib/systemd/system/docker.service ExecStart=/usr/bin/dockerd--graph/new-path/docker #reload配置文件 systemctldaemon-reload #重启docker systemctlrestartdocker.service
补充知识：Docker指定数据储存目录
Docker指定储存目录(原参数--graph已经失效。)
方法一
一、在Docker配置文件中配置/etc/docker/daemon.json
下面的命令是在daemon.json文件没有内容的时候进行添加的。如果有内容，就需要
cat<>/etc/docker/daemon.json { "data-root":"/mnt/docker-data" } EOF systemctlrestartdocker
方法二
二、在启动参数中配置
vim/usr/lib/systemd/system/docker.service
在里面的EXECStart的后面增加后如下:
ExecStart=/usr/bin/dockerd--data-root='/home/docker' systemctldaemon-reload systemctlrestartdocker
以上这篇docker文件存放路径,获取容器启动命令操作就是小编分享给大家的全部内容了，希望能给大家一个参考，也希望大家多多支持毛票票。