groupadd --root vs. chroot + groupadd
I am trying to prepare an image with buildah, but I am running into a problem with creating a new group inside the container.
buildah mount created a resonably healthy looking dir structure at /var/lib/containers/storage/overlay/ff00ff...6c/ where .../ff00ff...6c/merged is the root directory for the new fs.
Then if I run groupadd --root /var/lib/containers/storage/overlay/ff00ff...6c/merged --system --gid 888 mqm it fails and returns groupadd: failure while writing changes to /etc/group
However if I run chroot /var/lib/containers/storage/overlay/ff00ff...6c/merged and groupadd --system --gid 888 mqm it completes without an error and the group gets added to /etc/group
I should use the groupadd --root version, since that is what the original (official) script uses. Also all commands are run as root.
Are groupadd --root and chroot + groupadd not equivalent for this purpose? How can one be failing and the other run fine?
Any feedback appreciated, thank you
edit:
strace output
linux rhel group chroot container
asked Sep 20 '18 at 15:01
Raven221221221Raven221221221
11
add a comment |
I am trying to prepare an image with buildah, but I am running into a problem with creating a new group inside the container.
buildah mount created a resonably healthy looking dir structure at /var/lib/containers/storage/overlay/ff00ff...6c/ where .../ff00ff...6c/merged is the root directory for the new fs.
Then if I run groupadd --root /var/lib/containers/storage/overlay/ff00ff...6c/merged --system --gid 888 mqm it fails and returns groupadd: failure while writing changes to /etc/group
However if I run chroot /var/lib/containers/storage/overlay/ff00ff...6c/merged and groupadd --system --gid 888 mqm it completes without an error and the group gets added to /etc/group
I should use the groupadd --root version, since that is what the original (official) script uses. Also all commands are run as root.
Are groupadd --root and chroot + groupadd not equivalent for this purpose? How can one be failing and the other run fine?
Any feedback appreciated, thank you
edit:
strace output
linux rhel group chroot container
asked Sep 20 '18 at 15:01
Raven221221221Raven221221221
11
Can you try running groupadd with --root inside of strace, so we can see exactly where it's failing?
– Joseph Sible
Sep 20 '18 at 23:26
Edited the question with a link to thestraceoutput. I am not sure what I am looking for. The lock for/etc/groupseems fine, but writing to it seems to fail..
– Raven221221221
Sep 21 '18 at 11:35
add a comment |
I am trying to prepare an image with buildah, but I am running into a problem with creating a new group inside the container.
buildah mount created a resonably healthy looking dir structure at /var/lib/containers/storage/overlay/ff00ff...6c/ where .../ff00ff...6c/merged is the root directory for the new fs.
Then if I run groupadd --root /var/lib/containers/storage/overlay/ff00ff...6c/merged --system --gid 888 mqm it fails and returns groupadd: failure while writing changes to /etc/group
However if I run chroot /var/lib/containers/storage/overlay/ff00ff...6c/merged and groupadd --system --gid 888 mqm it completes without an error and the group gets added to /etc/group
I should use the groupadd --root version, since that is what the original (official) script uses. Also all commands are run as root.
Are groupadd --root and chroot + groupadd not equivalent for this purpose? How can one be failing and the other run fine?
Any feedback appreciated, thank you
edit:
strace output
linux rhel group chroot container
asked Sep 20 '18 at 15:01
Raven221221221Raven221221221
11
I am trying to prepare an image with buildah, but I am running into a problem with creating a new group inside the container.
buildah mount created a resonably healthy looking dir structure at /var/lib/containers/storage/overlay/ff00ff...6c/ where .../ff00ff...6c/merged is the root directory for the new fs.
Then if I run groupadd --root /var/lib/containers/storage/overlay/ff00ff...6c/merged --system --gid 888 mqm it fails and returns groupadd: failure while writing changes to /etc/group
However if I run chroot /var/lib/containers/storage/overlay/ff00ff...6c/merged and groupadd --system --gid 888 mqm it completes without an error and the group gets added to /etc/group
I should use the groupadd --root version, since that is what the original (official) script uses. Also all commands are run as root.
Are groupadd --root and chroot + groupadd not equivalent for this purpose? How can one be failing and the other run fine?
Any feedback appreciated, thank you
edit:
strace output
linux rhel group chroot container
linux rhel group chroot container
asked Sep 20 '18 at 15:01
Raven221221221Raven221221221
11
asked Sep 20 '18 at 15:01
Raven221221221Raven221221221
11
edited Sep 21 '18 at 11:32
Raven221221221
asked Sep 20 '18 at 15:01
Raven221221221Raven221221221
11
asked Sep 20 '18 at 15:01
Raven221221221Raven221221221
11
asked Sep 20 '18 at 15:01
Raven221221221Raven221221221
11
11
Can you try running groupadd with --root inside of strace, so we can see exactly where it's failing?
– Joseph Sible
Sep 20 '18 at 23:26
Edited the question with a link to thestraceoutput. I am not sure what I am looking for. The lock for/etc/groupseems fine, but writing to it seems to fail..
– Raven221221221
Sep 21 '18 at 11:35
add a comment |
Can you try running groupadd with --root inside of strace, so we can see exactly where it's failing?
– Joseph Sible
Sep 20 '18 at 23:26
Edited the question with a link to thestraceoutput. I am not sure what I am looking for. The lock for/etc/groupseems fine, but writing to it seems to fail..
– Raven221221221
Sep 21 '18 at 11:35
Can you try running groupadd with --root inside of strace, so we can see exactly where it's failing?
– Joseph Sible
Sep 20 '18 at 23:26
Can you try running groupadd with --root inside of strace, so we can see exactly where it's failing?
– Joseph Sible
Sep 20 '18 at 23:26
Edited the question with a link to the
strace output. I am not sure what I am looking for. The lock for /etc/group seems fine, but writing to it seems to fail..– Raven221221221
Sep 21 '18 at 11:35
Edited the question with a link to the
strace output. I am not sure what I am looking for. The lock for /etc/group seems fine, but writing to it seems to fail..– Raven221221221
Sep 21 '18 at 11:35
add a comment |
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Were you able to find a solution for this ? If so, can you please share ?
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Were you able to find a solution for this ? If so, can you please share ?
answered 19 mins ago
MananManan
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Manan is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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Were you able to find a solution for this ? If so, can you please share ?
answered 19 mins ago
MananManan
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Were you able to find a solution for this ? If so, can you please share ?
answered 19 mins ago
MananManan
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Were you able to find a solution for this ? If so, can you please share ?
answered 19 mins ago
MananManan
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Manan is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
answered 19 mins ago
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answered 19 mins ago
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Can you try running groupadd with --root inside of strace, so we can see exactly where it's failing?
– Joseph Sible
Sep 20 '18 at 23:26
Edited the question with a link to the
straceoutput. I am not sure what I am looking for. The lock for/etc/groupseems fine, but writing to it seems to fail..– Raven221221221
Sep 21 '18 at 11:35