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implement init containers in podman

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this is the first pass at implementing init containers for podman pods.
init containersare made popular by k8s as a way to run setup for pods
before the pods standard containers run.

unlike k8s, we support two styles of init containers: always and
oneshot.  always means the container stays in the pod and starts
whenever a pod is started.  this does not apply to pods restarting.
oneshot means the container runs onetime when the pod starts and then is
removed.

Signed-off-by: Brent Baude <bbaude@redhat.com>
This commit is contained in:
Brent Baude
2021-07-14 16:03:55 -05:00
parent e93661f5e7
commit 3c3fa6fac4
16 changed files with 366 additions and 20 deletions
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2
libpod/container_graph.go
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@ -259,7 +259,7 @@ func startNode(ctx context.Context, node *containerNode, setError bool, ctrError
}
// Start the container (only if it is not running)
if !ctrErrored {
if !ctrErrored && len(node.container.config.InitContainerType) < 1 {
if !restart && node.container.state.State != define.ContainerStateRunning {
if err := node.container.initAndStart(ctx); err != nil {
ctrErrored = true