On a Windows 10 host, Docker version 19.03.13, build 4484c46d9d, I tried running a docker image with all possible combinations of --tty
, --interactive
, and --detach
, but none of them brings me to a bash prompt, always exiting immediately. /bin/bash
is present in the image. The Dockerfile is from https://hub.docker.com/r/astj/centos5-vault/dockerfile
I ran:
docker run <switches> astj/centos5-vault /bin/bash
where <switches>
had been exercised with the full set of -t
, -i
, -d
combinations, namely:
-d
, -i
, -t
, -it
, -id
, -td
, -dit
In all cases, the container exits immediately.
If I change /bin/bash
to ls
, I can see a directory listing. But of course, the container exits immediately as expected. To troubleshoot, I experimented with the following entry commands on the astj/centos5-vault
image, with these docker switches. All of them exit immediately:
docker run <switches> astj/centos5-vault <entry_command>:
+----------+---------------------+---------------------------------------+
| Switches | Entry command | Output |
+----------+---------------------+---------------------------------------+
| | /bin/bash | None. Exits. |
| -i | /bin/bash | None. Exits. |
| -it | /bin/bash | None. Exits. |
| -t | /bin/bash | None. Exits. |
| -td | /bin/bash | Prints a container hash, exits. |
| -id | /bin/bash | Prints a container hash, exits. |
| -d | /bin/bash | Prints a container hash, exits. |
| -dit | /bin/bash | Prints a container hash, exits. |
| -it | ls -la /bin/bash | Lists bash file info*, exits. |
| -it | /bin/bash --version | None. Exits. |
| -it | /bin/bash --login | None. Exits. |
| -it | /bin/uname -r | "4.19.128-microsoft-standard". Exits. |
| | whoami | "root". Exits. |
+----------+---------------------+---------------------------------------+
*Listed bash file info is: -rwxr-xr-x 1 root root 768664 Jul 10 2013 /bin/bash
I tried to troubleshoot but docker logs <container>
doesn’t show a single line of log.
Does anyone know why the /bin/bash
command still causes the container to exit immediately instead of bringing me to a bash prompt?