I have a fresh CentOS 8 machine. Not knowing about "podman" I installed docker: yum install docker. This actually installs podman 1.0.5.
I can't run any images:
devrisenshine2 [wiretap_wrapper] % podman run -it --rm alpine sh
error creating libpod runtime: Error running podman info while refreshing state: exit status 1
devrisenshine2 [wiretap_wrapper] % sudo podman run -it --rm alpine sh
container create failed: cannot specify gid= mount options for unmapped gid in rootless containers
: internal libpod error
I understand /etc/sub?id can be related to this:
devrisenshine2 [wiretap_wrapper] % cat /etc/subuid
garyo:100000:65536
devrisenshine2 [wiretap_wrapper] % cat /etc/subgid
garyo:100000:65536
devrisenshine2 [wiretap_wrapper] % ls -l /etc/sub?id
-rw-r--r-- 1 root root 19 Jan 10 15:32 /etc/subgid
-rw-r--r-- 1 root root 19 Jan 10 15:32 /etc/subuid
Googling around I figured I need to install some other stuff:
sudo dnf install -y @container-tools
that installs buildah, ocio-umount, and skopeo, but nothing changes. I rebooted after that as well.
I'm not sure what to do next. I've used docker for years but not podman. Maybe I missed a config step?
It looks like there may be some fixes in later versions of podman, but on this machine I don't want to install all the build tools and dependencies to build podman from scratch.
Oh, here's my podman info:
devrisenshine2 [wiretap_wrapper] % podman info
ERRO[0000] cannot setup namespace using newuidmap: exit status 1
devrisenshine2 [wiretap_wrapper] % sudo podman info
host:
BuildahVersion: 1.6-dev
Conmon:
package: podman-1.0.5-1.gitf604175.module_el8.0.0+194+ac560166.x86_64
path: /usr/libexec/podman/conmon
version: 'conmon version 1.14.0-dev, commit: db4132fdf7a7a29546679331f7119a745266f613-dirty'
Distribution:
distribution: '"centos"'
version: "8"
MemFree: 1359548416
MemTotal: 1585446912
OCIRuntime:
package: runc-1.0.0-55.rc5.dev.git2abd837.module_el8.0.0+58+91b614e7.x86_64
path: /usr/bin/runc
version: 'runc version spec: 1.0.0'
SwapFree: 2122317824
SwapTotal: 2122317824
arch: amd64
cpus: 2
hostname: devrisenshine2
kernel: 5.3.13-1-pve
os: linux
rootless: false
uptime: 1m 40s
insecure registries:
registries: []
registries:
registries:
- registry.redhat.io
- quay.io
- docker.io
store:
ConfigFile: /etc/containers/storage.conf
ContainerStore:
number: 0
GraphDriverName: overlay
GraphOptions: null
GraphRoot: /var/lib/containers/storage
GraphStatus:
Backing Filesystem: extfs
Native Overlay Diff: "false"
Supports d_type: "true"
Using metacopy: "false"
ImageStore:
number: 2
RunRoot: /var/run/containers/storage
What might I be missing?
