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package container // import "github.com/docker/docker/integration/container"
import (
"context"
"os/exec"
"regexp"
"sort"
"testing"
"time"
"github.com/docker/docker/api/types/checkpoint"
containertypes "github.com/docker/docker/api/types/container"
mounttypes "github.com/docker/docker/api/types/mount"
"github.com/docker/docker/client"
"github.com/docker/docker/integration/internal/container"
"github.com/docker/docker/testutil/request"
"gotest.tools/v3/assert"
is "gotest.tools/v3/assert/cmp"
"gotest.tools/v3/poll"
"gotest.tools/v3/skip"
)
//nolint:unused // false positive: linter detects this as "unused"
func containerExec(ctx context.Context, t *testing.T, client client.APIClient, cID string, cmd []string) {
t.Logf("Exec: %s", cmd)
r, err := container.Exec(ctx, client, cID, cmd)
assert.NilError(t, err)
t.Log(r.Combined())
assert.Equal(t, r.ExitCode, 0)
}
func TestCheckpoint(t *testing.T) {
t.Skip("TestCheckpoint is broken; see https://github.com/moby/moby/issues/38963")
skip.If(t, testEnv.DaemonInfo.OSType == "windows")
skip.If(t, !testEnv.DaemonInfo.ExperimentalBuild)
ctx := setupTest(t)
stdoutStderr, err := exec.Command("criu", "check").CombinedOutput()
t.Logf("%s", stdoutStderr)
assert.NilError(t, err)
apiClient := request.NewAPIClient(t)
t.Log("Start a container")
cID := container.Run(ctx, t, apiClient, container.WithMount(mounttypes.Mount{
Type: mounttypes.TypeTmpfs,
Target: "/tmp",
}))
// FIXME: ipv6 iptables modules are not uploaded in the test environment
stdoutStderr, err = exec.Command("bash", "-c", "set -x; "+
"mount --bind $(type -P true) $(type -P ip6tables-restore) && "+
"mount --bind $(type -P true) $(type -P ip6tables-save)",
).CombinedOutput()
t.Logf("%s", stdoutStderr)
assert.NilError(t, err)
defer func() {
stdoutStderr, err = exec.Command("bash", "-c", "set -x; "+
"umount -c -i -l $(type -P ip6tables-restore); "+
"umount -c -i -l $(type -P ip6tables-save)",
).CombinedOutput()
t.Logf("%s", stdoutStderr)
assert.NilError(t, err)
}()
t.Log("Do a checkpoint and leave the container running")
err = apiClient.CheckpointCreate(ctx, cID, checkpoint.CreateOptions{
Exit: false,
CheckpointID: "test",
})
if err != nil {
// An error can contain a path to a dump file
t.Log(err)
re := regexp.MustCompile("path= (.*): ")
m := re.FindStringSubmatch(err.Error())
if len(m) >= 2 {
dumpLog := m[1]
t.Logf("%s", dumpLog)
cmd := exec.Command("cat", dumpLog)
stdoutStderr, err = cmd.CombinedOutput()
t.Logf("%s", stdoutStderr)
}
}
assert.NilError(t, err)
inspect, err := apiClient.ContainerInspect(ctx, cID)
assert.NilError(t, err)
assert.Check(t, is.Equal(true, inspect.State.Running))
checkpoints, err := apiClient.CheckpointList(ctx, cID, checkpoint.ListOptions{})
assert.NilError(t, err)
assert.Equal(t, len(checkpoints), 1)
assert.Equal(t, checkpoints[0].Name, "test")
// Create a test file on a tmpfs mount.
containerExec(ctx, t, apiClient, cID, []string{"touch", "/tmp/test-file"})
// Do a second checkpoint
t.Log("Do a checkpoint and stop the container")
err = apiClient.CheckpointCreate(ctx, cID, checkpoint.CreateOptions{
Exit: true,
CheckpointID: "test2",
})
assert.NilError(t, err)
poll.WaitOn(t,
container.IsInState(ctx, apiClient, cID, "exited"),
poll.WithDelay(100*time.Millisecond),
)
inspect, err = apiClient.ContainerInspect(ctx, cID)
assert.NilError(t, err)
assert.Check(t, is.Equal(false, inspect.State.Running))
// Check that both checkpoints are listed.
checkpoints, err = apiClient.CheckpointList(ctx, cID, checkpoint.ListOptions{})
assert.NilError(t, err)
assert.Equal(t, len(checkpoints), 2)
cptNames := make([]string, 2)
for i, c := range checkpoints {
cptNames[i] = c.Name
}
sort.Strings(cptNames)
assert.Equal(t, cptNames[0], "test")
assert.Equal(t, cptNames[1], "test2")
// Restore the container from a second checkpoint.
t.Log("Restore the container")
err = apiClient.ContainerStart(ctx, cID, containertypes.StartOptions{
CheckpointID: "test2",
})
assert.NilError(t, err)
inspect, err = apiClient.ContainerInspect(ctx, cID)
assert.NilError(t, err)
assert.Check(t, is.Equal(true, inspect.State.Running))
// Check that the test file has been restored.
containerExec(ctx, t, apiClient, cID, []string{"test", "-f", "/tmp/test-file"})
for _, id := range []string{"test", "test2"} {
err = apiClient.CheckpointDelete(ctx, cID, checkpoint.DeleteOptions{
CheckpointID: id,
})
assert.NilError(t, err)
}
}
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