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85 lines
2.5 KiB
Go
85 lines
2.5 KiB
Go
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package container
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import (
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"context"
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"fmt"
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"io/ioutil"
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"strconv"
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"strings"
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"testing"
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"github.com/docker/docker/api/types"
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"github.com/docker/docker/api/types/container"
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"github.com/docker/docker/integration-cli/daemon"
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"github.com/stretchr/testify/assert"
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"golang.org/x/sys/unix"
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)
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// This is a regression test for #36145
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// It ensures that a container can be started when the daemon was improperly
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// shutdown when the daemon is brought back up.
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//
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// The regression is due to improper error handling preventing a container from
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// being restored and as such have the resources cleaned up.
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//
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// To test this, we need to kill dockerd, then kill both the containerd-shim and
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// the container process, then start dockerd back up and attempt to start the
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// container again.
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func TestContainerStartOnDaemonRestart(t *testing.T) {
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t.Parallel()
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d := daemon.New(t, "", "dockerd", daemon.Config{})
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d.StartWithBusybox(t, "--iptables=false")
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defer d.Stop(t)
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client, err := d.NewClient()
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assert.NoError(t, err, "error creating client")
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ctx := context.Background()
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c, err := client.ContainerCreate(ctx,
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&container.Config{
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Image: "busybox",
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Cmd: []string{"top"},
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},
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nil,
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nil,
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"",
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)
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assert.NoError(t, err, "error creating test container")
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defer client.ContainerRemove(ctx, c.ID, types.ContainerRemoveOptions{Force: true})
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err = client.ContainerStart(ctx, c.ID, types.ContainerStartOptions{})
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assert.NoError(t, err, "error starting test container")
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inspect, err := client.ContainerInspect(ctx, c.ID)
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assert.NoError(t, err, "error getting inspect data")
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ppid := getContainerdShimPid(t, inspect)
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err = d.Kill()
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assert.NoError(t, err, "failed to kill test daemon")
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err = unix.Kill(inspect.State.Pid, unix.SIGKILL)
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assert.NoError(t, err, "failed to kill container process")
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err = unix.Kill(ppid, unix.SIGKILL)
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assert.NoError(t, err, "failed to kill containerd-shim")
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d.Start(t, "--iptables=false")
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err = client.ContainerStart(ctx, c.ID, types.ContainerStartOptions{})
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assert.NoError(t, err, "failed to start test container")
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}
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func getContainerdShimPid(t *testing.T, c types.ContainerJSON) int {
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statB, err := ioutil.ReadFile(fmt.Sprintf("/proc/%d/stat", c.State.Pid))
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assert.NoError(t, err, "error looking up containerd-shim pid")
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// ppid is the 4th entry in `/proc/pid/stat`
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ppid, err := strconv.Atoi(strings.Fields(string(statB))[3])
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assert.NoError(t, err, "error converting ppid field to int")
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assert.NotEqual(t, ppid, 1, "got unexpected ppid")
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return ppid
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}
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