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Podman pod create --share-parent vs --share=cgroup

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separated cgroupNS sharing from setting the pod as the cgroup parent,
made a new flag --share-parent which sets the pod as the cgroup parent for all
containers entering the pod

remove cgroup from the default kernel namespaces since we want the same default behavior as before which is just the cgroup parent.

resolves #12765

Signed-off-by: cdoern <cdoern@redhat.com>
Signed-off-by: cdoern <cbdoer23@g.holycross.edu>
Signed-off-by: cdoern <cdoern@redhat.com>
This commit is contained in:
cdoern
2022-01-18 15:46:11 -05:00
committed by Matthew Heon
parent 85c0fe7dc0
commit b1bf91a22a
11 changed files with 74 additions and 5 deletions
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8
docs/source/markdown/podman-pod-create.1.md
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@ -265,7 +265,7 @@ Note: Labeling can be disabled for all containers by setting label=false in the
#### **--share**=*namespace*
A comma-separated list of kernel namespaces to share. If none or "" is specified, no namespaces will be shared. The namespaces to choose from are ipc, net, pid, uts.
A comma-separated list of kernel namespaces to share. If none or "" is specified, no namespaces will be shared. The namespaces to choose from are cgroup, ipc, net, pid, uts.
The operator can identify a pod in three ways:
UUID long identifier (“f78375b1c487e03c9438c729345e54db9d20cfa2ac1fc3494b6eb60872e74778”)
@ -276,6 +276,12 @@ podman generates a UUID for each pod, and if a name is not assigned
to the container with **--name** then a random string name will be generated
for it. The name is useful any place you need to identify a pod.
#### **--share-parent**
This boolean determines whether or not all containers entering the pod will use the pod as their cgroup parent. The default value of this flag is true. If you are looking to share the cgroup namespace rather than a cgroup parent in a pod, use **--share**
Note: This options conflict with **--share=cgroup** since that would set the pod as the cgroup parent but enter the container into the same cgroupNS as the infra container.
#### **--sysctl**=_name_=_value_
Configure namespace kernel parameters for all containers in the pod.