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274d34a25a
Add auto-update support to `podman kube play`. Auto-update policies can
be configured for:
* the entire pod via the `io.containers.autoupdate` annotation
* a specific container via the `io.containers.autoupdate/$name` annotation
To make use of rollbacks, the `io.containers.sdnotify` policy should be
set to `container` such that the workload running _inside_ the container
can send the READY message via the NOTIFY_SOCKET once ready. For
further details on auto updates and rollbacks, please refer to the
specific article [1].
Since auto updates and rollbacks bases on Podman's systemd integration,
the k8s YAML must be executed in the `podman-kube@` systemd template.
For further details on how to run k8s YAML in systemd via Podman, please
refer to the specific article [2].
An examplary k8s YAML may look as follows:
```YAML
apiVersion: v1
kind: Pod
metadata:
annotations:
io.containers.autoupdate: "local"
io.containers.autoupdate/b: "registry"
labels:
app: test
name: test_pod
spec:
containers:
- command:
- top
image: alpine
name: a
- command:
- top
image: alpine
name: b
```
[1] https://www.redhat.com/sysadmin/podman-auto-updates-rollbacks
[2] https://www.redhat.com/sysadmin/kubernetes-workloads-podman-systemd
Signed-off-by: Valentin Rothberg <vrothberg@redhat.com>
59 lines
1.3 KiB
Go
59 lines
1.3 KiB
Go
package notifyproxy
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import (
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"testing"
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"time"
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"github.com/coreos/go-systemd/v22/daemon"
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"github.com/stretchr/testify/require"
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)
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// Helper function to send the specified message over the socket of the proxy.
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func sendMessage(t *testing.T, proxy *NotifyProxy, message string) {
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err := SendMessage(proxy.SocketPath(), message)
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require.NoError(t, err)
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}
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func TestNotifyProxy(t *testing.T) {
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proxy, err := New("")
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require.NoError(t, err)
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require.FileExists(t, proxy.SocketPath())
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require.NoError(t, proxy.close())
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require.NoFileExists(t, proxy.SocketPath())
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}
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func TestWaitAndClose(t *testing.T) {
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proxy, err := New("")
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require.NoError(t, err)
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require.FileExists(t, proxy.SocketPath())
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ch := make(chan error)
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go func() {
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ch <- proxy.WaitAndClose()
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}()
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sendMessage(t, proxy, "foo\n")
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time.Sleep(250 * time.Millisecond)
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select {
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case err := <-ch:
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t.Fatalf("Should still be waiting but received %v", err)
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default:
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}
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sendMessage(t, proxy, daemon.SdNotifyReady+"\nsomething else\n")
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done := func() bool {
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for i := 0; i < 10; i++ {
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select {
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case err := <-ch:
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require.NoError(t, err, "Waiting should succeed")
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return true
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default:
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time.Sleep(time.Duration(i*250) * time.Millisecond)
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}
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}
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return false
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}()
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require.True(t, done, "READY MESSAGE SHOULD HAVE ARRIVED")
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}
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