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docker如何對(duì)已經(jīng)啟動(dòng)的容器添加目錄映射(掛載目錄)_docker

作者：alwaysonline819 ? 更新時(shí)間： 2023-05-29 編程語言

1. 背景

在自己安裝sharding-proxy時(shí)，使用docker run -v的方式啟動(dòng)時(shí)，只掛載了/opt/shardingsphere-proxy/conf和/opt/shardingsphere-proxy/ext-lib這兩個(gè)目錄，忘記掛載/opt/shardingsphere-proxy/logs日志目錄，導(dǎo)致每次查看都得要進(jìn)入容器內(nèi)部去查看，很是麻煩，于是考慮如何在不刪除容器重新啟動(dòng)部署的情況下進(jìn)行新目錄的映射與掛載

2. 開始新增掛載目錄

1.查看容器存放目錄

[root@iZ2zedqr9yeos47fg4uor5Z proxy-a]# docker info | grep 'Root'
 Docker Root Dir: /var/lib/docker
[root@iZ2zedqr9yeos47fg4uor5Z proxy-a]#

2.查看要新增掛載的容器id

[root@iZ2zedqr9yeos47fg4uor5Z proxy-a]# docker ps
CONTAINER ID   IMAGE                               COMMAND                  CREATED       STATUS          PORTS                               NAMES
6f5f3c195304   apache/shardingsphere-proxy:5.1.1   "/bin/sh -c '${LOCAL…"   4 days ago    Up 9 minutes    0.0.0.0:3321->3307/tcp              server-proxy-a

3.進(jìn)入要新增文件夾掛載的目錄

[root@iZ2zedqr9yeos47fg4uor5Z proxy-a]# docker ps
CONTAINER ID   IMAGE                               COMMAND                  CREATED       STATUS          PORTS                               NAMES
6f5f3c195304   apache/shardingsphere-proxy:5.1.1   "/bin/sh -c '${LOCAL…"   4 days ago    Up 11 minutes   0.0.0.0:3321->3307/tcp              server-proxy-a
[root@iZ2zedqr9yeos47fg4uor5Z proxy-a]# cd /var/lib/docker/containers/
[root@iZ2zedqr9yeos47fg4uor5Z containers]# ll
total 64
drwx------ 4 root root 4096 Nov  7 14:20 1d0c21204385f60fa8859b0ff199569988218e449155634470cfb14ff2ceebf9
drwx------ 4 root root 4096 Nov  7 14:20 21a5f8b6e68ee09f8f80381c536b38abec1b8dcb81c69f1c50caeb95e8ebb35f
drwx------ 4 root root 4096 Nov  7 14:20 28242c9fd16bd610880d42a773e078221a0d34b1c779935fc0c8609a1b63666a
drwx------ 4 root root 4096 Nov  7 14:22 2bc290c8e158229fdc5291a3ea53c5721f5becd39c8cb47cb2f826f6349ac778
drwx------ 4 root root 4096 Nov  7 14:20 2fc0e1b1031abe6b1871332b971ccdc40185b7441e94ba3c266f51d2d4728412
drwx------ 4 root root 4096 Nov  7 14:20 3124c345f129a3c542423c68061c6ded5b41a649b25991125c8e81da7b010e7e
drwx------ 4 root root 4096 Nov  7 14:20 4a1e699a3711b92918f711d7ab021a5ac62bab1b8353ed321337c6f94ac50533
drwx------ 4 root root 4096 Nov  7 14:20 4cdc6456250a922e60f3394b26064be0541f04a0c34825c6487e73ed7979705a
drwx------ 4 root root 4096 Nov  7 14:20 53d710c37c08b9c2ab0c84fea2059d067bbcbc38f22aa2e654e1c62758b1df44
drwx------ 4 root root 4096 Nov  7 14:41 6f5f3c1953044043672723cdf4f3725c500e77a54e07cd0a4759371c04c0cfa1
drwx------ 4 root root 4096 Nov  7 14:20 73cc941fd394d42b8cbdc8fd7a50fc098b5d56c0323e5b9a786703d21a102d33
drwx------ 4 root root 4096 Nov  7 14:35 8dc6124199b0ef6afbc9d2b542c5a46c8767e7daafd52bfedd53a83491e17db0
drwx------ 4 root root 4096 Nov  7 14:20 9c554d94d5eb6c2c6015994b52ae3f3c31d182dde189d86427840b4a1c5d6477
drwx------ 4 root root 4096 Nov  7 14:20 a073fcd724623a98168564707dccfb9562d94d89c0882ad2fd92798a2137be0d
drwx------ 4 root root 4096 Nov  7 14:21 b1191679d1ecea73a74f44ee74b33281fbcccc942307630db02f2cb9e86869d0
drwx------ 4 root root 4096 Nov  7 14:20 eb30519b4804f9ca3c708260e885f99d693332af4a162a956952b601332fed97
[root@iZ2zedqr9yeos47fg4uor5Z containers]# cd 6f5f3c1953044043672723cdf4f3725c500e77a54e07cd0a4759371c04c0cfa1/
[root@iZ2zedqr9yeos47fg4uor5Z 6f5f3c1953044043672723cdf4f3725c500e77a54e07cd0a4759371c04c0cfa1]# ll
total 488
-rw-r----- 1 root root 461990 Nov  7 14:41 6f5f3c1953044043672723cdf4f3725c500e77a54e07cd0a4759371c04c0cfa1-json.log
drwx------ 2 root root   4096 Nov  2 22:29 checkpoints
-rw------- 1 root root   4041 Nov  7 14:41 config.v2.json
-rw-r--r-- 1 root root   1705 Nov  7 14:41 hostconfig.json
-rw-r--r-- 1 root root     13 Nov  7 14:41 hostname
-rw-r--r-- 1 root root    174 Nov  7 14:41 hosts
drwx------ 2 root root   4096 Nov  2 22:29 mounts
-rw-r--r-- 1 root root    149 Nov  7 14:41 resolv.conf
-rw-r--r-- 1 root root     71 Nov  7 14:41 resolv.conf.hash
[root@iZ2zedqr9yeos47fg4uor5Z 6f5f3c1953044043672723cdf4f3725c500e77a54e07cd0a4759371c04c0cfa1]#

我們將要修改的文件就是config.v2.json和hostconfig.json

4.關(guān)閉容器、關(guān)閉docker

systemctl stop docker

5.修改config.v2.json

說明：想要將容器中的/opt/shardingsphere-proxy/logs目錄映射到宿主機(jī)的/atguigu/server/proxy-a/logs目錄下。
在config.v2.json文件中找到MountPoints，添加如下/opt/shardingsphere-proxy/logs的映射即可(這里如果前面還有內(nèi)容的話，注意逗號(hào))

{
    ......
	
	"MountPoints": {
		......,
		"/opt/shardingsphere-proxy/logs": {
			"Source": "/atguigu/server/proxy-a/logs",
			"Destination": "/opt/shardingsphere-proxy/logs",
			"RW": true,
			"Name": "",
			"Driver": "",
			"Type": "bind",
			"Propagation": "rprivate",
			"Spec": {
				"Type": "bind",
				"Source": "/atguigu/server/proxy-a/logs",
				"Target": "/opt/shardingsphere-proxy/logs"
			},
			"SkipMountpointCreation": false
		}
	},
	
	......
	
}

6.修改hostconfig.json

說明：Binds中添加內(nèi)容"/atguigu/server/proxy-a/logs:/opt/shardingsphere-proxy/logs"

{
	"Binds": [
		......,
		"/atguigu/server/proxy-a/logs:/opt/shardingsphere-proxy/logs"
	],
	......
}

7.重啟docker與容器

systemctl start docker
docker start 容器id

8.進(jìn)行目錄驗(yàn)證

目錄成功映射 出來，查看日志就不用每次很麻煩的進(jìn)入容器內(nèi)部查看了

[root@iZ2zedqr9yeos47fg4uor5Z logs]# pwd
/atguigu/server/proxy-a/logs
[root@iZ2zedqr9yeos47fg4uor5Z logs]# ll
total 36
-rw-r--r-- 1 root root 36421 Nov  7 14:41 stdout.log
-rw-r--r-- 1 root root     0 Nov  7 14:41 xa_tx1.log
-rw-r--r-- 1 root root     0 Nov  7 14:41 xa_tx.lck
[root@iZ2zedqr9yeos47fg4uor5Z logs]#

3. 注意

  • config.v2.json和hostconfig.json文件修改之前，需要關(guān)閉docker與容器！如果先修改了這兩個(gè)文件，再關(guān)閉docker，這兩個(gè)文件中的內(nèi)容會(huì)被重置掉，導(dǎo)致新增的目錄映射失效 （自己在這里折騰了很久才發(fā)現(xiàn)的！）
  • config.v2.json和hostconfig.json文件vi命令打開后，并非格式化后的json，這里可以通過:%!python3 -m json.tool命令將其進(jìn)行格式化，方便查看

總結(jié)

原文鏈接：https://blog.csdn.net/qq_39198749/article/details/127731024

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