2:52 a.m.
Hi Jan,
are you using cgroup v2 on your host? podman info can confirm that.
If so, the ubi7 image uses a systemd version that has no support for
cgroup v2.
What you can do is:
1) use cgroup v1 on the host
2) use ubi:8 for the container
3) if you are using crun, you can mount cgroup v1 in the container:
# mkdir /sys/fs/cgroup/systemd
# mount none -t cgroup -o none,name=systemd /sys/fs/cgroup/systemd
# podman run --annotation run.oci.systemd.force_cgroup_v1=/sys/fs/cgroup ....
Giuseppe
Jan Hutař <jhutar(a)redhat.com> writes:
Hello!
I have an issue with running "ubi7-init" based container. When I base mine
container on "fedora", it works fine:
$ cat Containerfile
FROM fedora
RUN dnf -y install httpd; dnf clean all; systemctl enable httpd
EXPOSE 80
CMD [ "/sbin/init" ]
and then:
$ sudo podman build -f Containerfile
$ sudo podman run -ti -p 80:80
20185593d0f96c4dee56e351eae4754cdd429679c1b645dae1b6f24880ce33fc
systemd v246.6-3.fc33 running in system mode. (+PAM +AUDIT
+SELINUX +IMA -APPARMOR +SMACK +SYSVINIT +UTMP +LIBCRYPTSETUP +GCRYPT
+GNUTLS +ACL +XZ +LZ4 +ZSTD +SECCOMP +BLKID +ELFUTILS +KMOD +IDN2 -IDN
+PCRE2 default-hierarchy=unified)
[...]
[ OK ] Started The Apache HTTP Server.
[...]
But when I try the same with ubi7-init based container (or rhel7-init):
$ cat Containerfile
FROM registry.access.redhat.com/ubi7/ubi-init
RUN echo -e
"[repo1]\nname=repo1\nbaseurl=http://repos.example.com/RHEL-7/7.9/Server/x86_64/os/\ngpgcheck=0\nenabled=1"
>/etc/yum.repos.d/repo1.repo; yum -y install httpd; yum clean all;
systemctl enable httpd
EXPOSE 80
CMD [ "/sbin/init" ]
it fails:
$ sudo podman run -ti -p 80:80
d872b16b8d0f9718c60420e3569cb4d5ddd16053fb72903e70d7b62ba3f34964
Failed to mount cgroup at /sys/fs/cgroup/systemd: Operation not permitted
[!!!!!!] Failed to mount API filesystems, freezing.
And same with privileged:
$ sudo podman run -ti -p 80:80 --privileged=true
d872b16b8d0f9718c60420e3569cb4d5ddd16053fb72903e70d7b62ba3f34964
Failed to mount cgroup at /sys/fs/cgroup/systemd: Operation not permitted
[!!!!!!] Failed to mount API filesystems, freezing.
I have these versions:
$ rpm -q fedora-release-common podman
fedora-release-common-33-3.noarch
podman-2.2.1-1.fc33.x86_64
$ sudo podman version
Version: 2.2.1
API Version: 2.1.0
Go Version: go1.15.5
Built: Tue Dec 8 15:37:50 2020
OS/Arch: linux/amd64
Running very similar container on RHEL7 with docker-1.10.3-59.el7.x86_64
(there is 1.13.1 available, but have not tried) works fine.
Please, any idea on what I'm doing wrong?
Thank you in advance and happy new year!
Regards,
Jan