我的Dockerfile创建一个目录,使用chown命令更改它的所有者,然后列出该目录的内容。但是该目录仍然由root用户拥有。为什么会这样呢?
以下是Dockerfile的内容:
FROM ubuntu:precise
RUN useradd -d /home/testuser -m -s /bin/bash testuser
RUN mkdir -p /var/local/testrunner/logs
VOLUME ["/var/local/testrunner/logs"]
RUN grep testuser /etc/passwd
RUN grep root /etc/passwd
RUN chown -R testuser:testuser /var/local/testrunner/logs
RUN ls -ld /var/local/testrunner/logs
以下是 "docker build" 命令的输出结果:
Sending build context to Docker daemon 10.24 kB
Sending build context to Docker daemon
Step 0 : FROM ubuntu:precise
---> ab8e2728644c
Step 1 : RUN useradd -d /home/testuser -m -s /bin/bash testuser
---> Using cache
---> 640f12671c86
Step 2 : RUN mkdir -p /var/local/testrunner/logs
---> Using cache
---> bf7756fd5b1f
Step 3 : VOLUME ["/var/local/testrunner/logs"]
---> Using cache
---> 65c73ee76c20
Step 4 : RUN grep testuser /etc/passwd
---> Using cache
---> db72fff0b965
Step 5 : RUN grep root /etc/passwd
---> Running in ebff78df7a9a
root:x:0:0:root:/root:/bin/bash
---> ead0ff704a59
Removing intermediate container ebff78df7a9a
Step 6 : RUN chown -R testuser:testuser /var/local/testrunner/logs
---> Running in c925f67b2ab4
---> 253132be935e
Removing intermediate container c925f67b2ab4
Step 7 : RUN ls -ld /var/local/testrunner/logs
---> Running in 978bc66aa47e
drwxr-xr-x 2 root staff 4096 Oct 1 15:15 /var/local/testrunner/logs
Docker版本为1.2.0,构建版本号为fa7b24f。
主机运行的是Ubuntu 12.04操作系统,但内核版本为3.13.0-36-generic。