stats: ignore errors from containers without cgroups

Now `podman stats --all` ignores failures from a container that has no
cgroups.

Closes: https://github.com/containers/podman/issues/24632

Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>

pkg/domain/infra/abi/containers.go

@@ -1633,7 +1633,8 @@ func (ic *ContainerEngine) ContainerStats(ctx context.Context, namesOrIds []stri
 						// update the container state
 						// https://github.com/containers/podman/issues/23334
 						(errors.Is(err, define.ErrCtrRemoved) || errors.Is(err, define.ErrNoSuchCtr) ||
-							errors.Is(err, define.ErrCtrStateInvalid) || errors.Is(err, define.ErrCtrStopped)) {
+							errors.Is(err, define.ErrCtrStateInvalid) || errors.Is(err, define.ErrCtrStopped) ||
+							errors.Is(err, define.ErrNoCgroups)) {
 						continue
 					}
 					return nil, err

test/system/420-cgroups.bats

@@ -52,6 +52,19 @@ load helpers
     # --cgroupns=host is required to have full visibility of the cgroup path inside the container
     run_podman run --cgroups=disabled --cgroupns=host --rm $IMAGE cat /proc/self/cgroup
     is "$output" $current_cgroup "--cgroups=disabled must not change the current cgroup"
+
+    ctr1="c1-$(safename)"
+    ctr2="c2-$(safename)"
+
+    # verify that "podman stats --all" works when there is a container with --cgroups=disabled
+    run_podman run --cgroups=disabled --name $ctr1 -d $IMAGE top
+    run_podman run --name $ctr2 -d $IMAGE top
+
+    run_podman stats -a --no-stream --no-reset
+    assert "$output" !~ "$ctr1" "ctr1 not in stats output"
+    assert "$output" =~ "$ctr2" "ctr2 in stats output"
+
+    run_podman rm -f -t 0 $ctr1 $ctr2
 }
 
 # vim: filetype=sh