无法从 docker 修改容器中的文件
Unable to modify files in container from docker
我正在尝试通过修改现有映像中的某些文件来构建映像。但是，文件不会被 RUN 命令更改。我的 docker 文件是
FROM vromero/activemq-artemis
ADD . .
RUN ls
RUN whoami
# Overwrite existing password file. The existing file is invulnerable, and
# cannot be modified by docker. I have no idea why.
RUN rm -f /var/lib/artemis/etc/artemis-users.properties
RUN ls -l /var/lib/artemis/etc
RUN mv passwords.txt /var/lib/artemis/etc/artemis-users.properties
RUN cat /var/lib/artemis/etc/artemis-users.properties
RUN touch /var/lib/artemis/etc/touch-test
# Add the predefined queues
RUN sed -i.bak '/<core/r queues.xml' /var/lib/artemis/etc/broker.xml
# EOF
基本图像来自 public docker 存储库。当我 运行 它时，我得到以下输出
$ docker build .
Sending build context to Docker daemon 4.608 kB
Step 0 : FROM vromero/activemq-artemis
---> 4e0f54c798cc
Step 1 : ADD . .
---> 3efde5a1fdea
Removing intermediate container c8621adc900b
Step 2 : RUN ls
---> Running in 5c5dca9449da
Dockerfile
artemis
artemis-service
passwords.txt
queues.xml
---> 22c541f98339
Removing intermediate container 5c5dca9449da
Step 3 : RUN whoami
---> Running in f11fcd2e2c5b
root
---> 15ee9aeb4c15
Removing intermediate container f11fcd2e2c5b
Step 4 : RUN rm -f /var/lib/artemis/etc/artemis-users.properties
---> Running in ab4383f0bb91
---> 10877bdb08ee
Removing intermediate container ab4383f0bb91
Step 5 : RUN ls -l /var/lib/artemis/etc
---> Running in a5669c8808e8
total 24
-rw-r--r-- 1 artemis artemis 959 Oct 4 05:40 artemis-roles.properties
-rw-r--r-- 1 artemis artemis 968 Oct 4 05:40 artemis-users.properties
-rwxrwxr-x 1 artemis artemis 1342 Oct 4 05:40 artemis.profile
-rw-r--r-- 1 artemis artemis 1302 Oct 4 05:40 bootstrap.xml
-rw-r--r-- 1 artemis artemis 4000 Oct 4 05:40 broker.xml
-rw-r--r-- 1 artemis artemis 2203 Oct 4 05:40 logging.properties
---> 02e3acc58653
Removing intermediate container a5669c8808e8
Step 6 : RUN mv passwords.txt /var/lib/artemis/etc/artemis-users.properties
---> Running in 68000aa34f6b
---> ec057d5adc67
Removing intermediate container 68000aa34f6b
Step 7 : RUN cat /var/lib/artemis/etc/artemis-users.properties
---> Running in 934a36d8c4d1
## ---------------------------------------------------------------------------
## Licensed to the Apache Software Foundation (ASF) under one or more
## contributor license agreements. See the NOTICE file distributed with
## this work for additional information regarding copyright ownership.
## The ASF licenses this file to You under the Apache License, Version 2.0
## (the "License"); you may not use this file except in compliance with
## the License. You may obtain a copy of the License at
##
## http://www.apache.org/licenses/LICENSE-2.0
##
## Unless required by applicable law or agreed to in writing, software
## distributed under the License is distributed on an "AS IS" BASIS,
## WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
## See the License for the specific language governing permissions and
## limitations under the License.
## ---------------------------------------------------------------------------
apollo=ollopaehcapa ---> ca1bad8a8903
Removing intermediate container 934a36d8c4d1
Step 8 : RUN touch /var/lib/artemis/etc/touch-test
---> Running in cb931c5cfcd1
---> 6961b4fcde75
Removing intermediate container cb931c5cfcd1
Step 9 : RUN sed -i.bak '/<core/r queues.xml' /var/lib/artemis/etc/broker.xml
---> Running in a829642b29ab
---> effd394fc02f
Removing intermediate container a829642b29ab
Successfully built effd394fc02f
ADD . . 起作用了，因为 passwords.txt 和 queues.xml 都出现在 ls 中。 whoami说明当前用户是root，所以应该没有权限问题。
但是，现有文件没有更改。如果我 运行 图像但使用 bash 作为开始命令（见下文），none 个文件有当前日期，尽管 mved 的文件替换现有文件消失了。如果我将 sed 命令粘贴到 shell，它会更新文件。
$ docker run -it effd394fc02f bash
root@51d1cc0a94cb:/var/lib/artemis/bin# ls -l
total 16
-rw-r--r-- 1 root root 543 Oct 21 22:12 Dockerfile
-rwxrwxr-x 1 artemis artemis 3416 Oct 4 05:40 artemis
-rwxrwxr-x 1 artemis artemis 3103 Oct 4 05:40 artemis-service
-rw-r--r-- 1 root root 329 Oct 21 22:18 queues.xml
root@51d1cc0a94cb:/var/lib/artemis/bin# cd ../etc
root@51d1cc0a94cb:/var/lib/artemis/etc# ls -l
total 24
-rw-r--r-- 1 artemis artemis 959 Oct 4 05:40 artemis-roles.properties
-rw-r--r-- 1 artemis artemis 968 Oct 4 05:40 artemis-users.properties
-rwxrwxr-x 1 artemis artemis 1342 Oct 4 05:40 artemis.profile
-rw-r--r-- 1 artemis artemis 1302 Oct 4 05:40 bootstrap.xml
-rw-r--r-- 1 artemis artemis 4000 Oct 4 05:40 broker.xml
-rw-r--r-- 1 artemis artemis 2203 Oct 4 05:40 logging.properties
为什么 run 命令没有更改这些文件？
不是一个完整的答案，但至少是一个线索：您不更改构建映像的入口点。
这意味着您的图像仍将执行来自 vromero/activemq-artemis, which, according to its Dockerfile 的图像：
ENTRYPOINT ["/docker-entrypoint.sh"]
并且 docker-entrypoint.sh 可能会重置您在 docker run 上所做的一些更改。
Dockerfile 中有两个 RUN 命令。
您正在 运行宁此：RUN <command>（命令是 运行 在 shell - /bin/sh -c (shell形式)
另一个是这样的：RUN ["executable", "param1", "param2"] (exec form)
试试这个：
RUN ["rm", "-f", "/var/lib/artemis/etc/artemis-users.properties"]
RUN ["ls", "-l", "/var/lib/artemis/etc"]
RUN ["mv", "passwords.txt", "/var/lib/artemis/etc/artemis-users.properties"]
RUN ["cat", "/var/lib/artemis/etc/artemis-users.properties"]
RUN ["touch", "/var/lib/artemis/etc/touch-test"]
# Add the predefined queues
RUN ["sed", "-i.bak", "'/<core/r queues.xml'", "/var/lib/artemis/etc/broker.xml"]
实际问题与基础镜像的构建方式有关。如果你 运行 docker history --no-trunc vromero/activemq-artemis，你会看到这些命令（以及其他命令）：
<id> 6 weeks ago /bin/sh -c #(nop) VOLUME [/var/lib/artemis/etc] 0 B
<id> 6 weeks ago /bin/sh -c #(nop) VOLUME [/var/lib/artemis/tmp] 0 B
<id> 6 weeks ago /bin/sh -c #(nop) VOLUME [/var/lib/artemis/data] 0 B
Dockerfile volume documentation 州
Note: If any build steps change the data within the volume after it
has been declared, those changes will be discarded.
这意味着基础映像中的配置已锁定。
我通过根据历史命令的输出创建自己的 dockerfile 解决了我的问题，没有 volume 行。
我正在尝试通过修改现有映像中的某些文件来构建映像。但是，文件不会被 RUN 命令更改。我的 docker 文件是
FROM vromero/activemq-artemis
ADD . .
RUN ls
RUN whoami
# Overwrite existing password file. The existing file is invulnerable, and
# cannot be modified by docker. I have no idea why.
RUN rm -f /var/lib/artemis/etc/artemis-users.properties
RUN ls -l /var/lib/artemis/etc
RUN mv passwords.txt /var/lib/artemis/etc/artemis-users.properties
RUN cat /var/lib/artemis/etc/artemis-users.properties
RUN touch /var/lib/artemis/etc/touch-test
# Add the predefined queues
RUN sed -i.bak '/<core/r queues.xml' /var/lib/artemis/etc/broker.xml
# EOF
基本图像来自 public docker 存储库。当我 运行 它时，我得到以下输出
$ docker build .
Sending build context to Docker daemon 4.608 kB
Step 0 : FROM vromero/activemq-artemis
---> 4e0f54c798cc
Step 1 : ADD . .
---> 3efde5a1fdea
Removing intermediate container c8621adc900b
Step 2 : RUN ls
---> Running in 5c5dca9449da
Dockerfile
artemis
artemis-service
passwords.txt
queues.xml
---> 22c541f98339
Removing intermediate container 5c5dca9449da
Step 3 : RUN whoami
---> Running in f11fcd2e2c5b
root
---> 15ee9aeb4c15
Removing intermediate container f11fcd2e2c5b
Step 4 : RUN rm -f /var/lib/artemis/etc/artemis-users.properties
---> Running in ab4383f0bb91
---> 10877bdb08ee
Removing intermediate container ab4383f0bb91
Step 5 : RUN ls -l /var/lib/artemis/etc
---> Running in a5669c8808e8
total 24
-rw-r--r-- 1 artemis artemis 959 Oct 4 05:40 artemis-roles.properties
-rw-r--r-- 1 artemis artemis 968 Oct 4 05:40 artemis-users.properties
-rwxrwxr-x 1 artemis artemis 1342 Oct 4 05:40 artemis.profile
-rw-r--r-- 1 artemis artemis 1302 Oct 4 05:40 bootstrap.xml
-rw-r--r-- 1 artemis artemis 4000 Oct 4 05:40 broker.xml
-rw-r--r-- 1 artemis artemis 2203 Oct 4 05:40 logging.properties
---> 02e3acc58653
Removing intermediate container a5669c8808e8
Step 6 : RUN mv passwords.txt /var/lib/artemis/etc/artemis-users.properties
---> Running in 68000aa34f6b
---> ec057d5adc67
Removing intermediate container 68000aa34f6b
Step 7 : RUN cat /var/lib/artemis/etc/artemis-users.properties
---> Running in 934a36d8c4d1
## ---------------------------------------------------------------------------
## Licensed to the Apache Software Foundation (ASF) under one or more
## contributor license agreements. See the NOTICE file distributed with
## this work for additional information regarding copyright ownership.
## The ASF licenses this file to You under the Apache License, Version 2.0
## (the "License"); you may not use this file except in compliance with
## the License. You may obtain a copy of the License at
##
## http://www.apache.org/licenses/LICENSE-2.0
##
## Unless required by applicable law or agreed to in writing, software
## distributed under the License is distributed on an "AS IS" BASIS,
## WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
## See the License for the specific language governing permissions and
## limitations under the License.
## ---------------------------------------------------------------------------
apollo=ollopaehcapa ---> ca1bad8a8903
Removing intermediate container 934a36d8c4d1
Step 8 : RUN touch /var/lib/artemis/etc/touch-test
---> Running in cb931c5cfcd1
---> 6961b4fcde75
Removing intermediate container cb931c5cfcd1
Step 9 : RUN sed -i.bak '/<core/r queues.xml' /var/lib/artemis/etc/broker.xml
---> Running in a829642b29ab
---> effd394fc02f
Removing intermediate container a829642b29ab
Successfully built effd394fc02f
ADD . . 起作用了，因为 passwords.txt 和 queues.xml 都出现在 ls 中。 whoami说明当前用户是root，所以应该没有权限问题。
但是，现有文件没有更改。如果我 运行 图像但使用 bash 作为开始命令（见下文），none 个文件有当前日期，尽管 mved 的文件替换现有文件消失了。如果我将 sed 命令粘贴到 shell，它会更新文件。
$ docker run -it effd394fc02f bash
root@51d1cc0a94cb:/var/lib/artemis/bin# ls -l
total 16
-rw-r--r-- 1 root root 543 Oct 21 22:12 Dockerfile
-rwxrwxr-x 1 artemis artemis 3416 Oct 4 05:40 artemis
-rwxrwxr-x 1 artemis artemis 3103 Oct 4 05:40 artemis-service
-rw-r--r-- 1 root root 329 Oct 21 22:18 queues.xml
root@51d1cc0a94cb:/var/lib/artemis/bin# cd ../etc
root@51d1cc0a94cb:/var/lib/artemis/etc# ls -l
total 24
-rw-r--r-- 1 artemis artemis 959 Oct 4 05:40 artemis-roles.properties
-rw-r--r-- 1 artemis artemis 968 Oct 4 05:40 artemis-users.properties
-rwxrwxr-x 1 artemis artemis 1342 Oct 4 05:40 artemis.profile
-rw-r--r-- 1 artemis artemis 1302 Oct 4 05:40 bootstrap.xml
-rw-r--r-- 1 artemis artemis 4000 Oct 4 05:40 broker.xml
-rw-r--r-- 1 artemis artemis 2203 Oct 4 05:40 logging.properties
为什么 run 命令没有更改这些文件？
不是一个完整的答案，但至少是一个线索：您不更改构建映像的入口点。
这意味着您的图像仍将执行来自 vromero/activemq-artemis, which, according to its Dockerfile 的图像：
ENTRYPOINT ["/docker-entrypoint.sh"]
并且 docker-entrypoint.sh 可能会重置您在 docker run 上所做的一些更改。
Dockerfile 中有两个 RUN 命令。
您正在 运行宁此：RUN <command>（命令是 运行 在 shell - /bin/sh -c (shell形式)
另一个是这样的：RUN ["executable", "param1", "param2"] (exec form)
试试这个：
RUN ["rm", "-f", "/var/lib/artemis/etc/artemis-users.properties"]
RUN ["ls", "-l", "/var/lib/artemis/etc"]
RUN ["mv", "passwords.txt", "/var/lib/artemis/etc/artemis-users.properties"]
RUN ["cat", "/var/lib/artemis/etc/artemis-users.properties"]
RUN ["touch", "/var/lib/artemis/etc/touch-test"]
# Add the predefined queues
RUN ["sed", "-i.bak", "'/<core/r queues.xml'", "/var/lib/artemis/etc/broker.xml"]
实际问题与基础镜像的构建方式有关。如果你 运行 docker history --no-trunc vromero/activemq-artemis，你会看到这些命令（以及其他命令）：
<id> 6 weeks ago /bin/sh -c #(nop) VOLUME [/var/lib/artemis/etc] 0 B
<id> 6 weeks ago /bin/sh -c #(nop) VOLUME [/var/lib/artemis/tmp] 0 B
<id> 6 weeks ago /bin/sh -c #(nop) VOLUME [/var/lib/artemis/data] 0 B
Dockerfile volume documentation 州
Note: If any build steps change the data within the volume after it has been declared, those changes will be discarded.
这意味着基础映像中的配置已锁定。
我通过根据历史命令的输出创建自己的 dockerfile 解决了我的问题，没有 volume 行。