-
Notifications
You must be signed in to change notification settings - Fork 1.3k
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
Add test that runs
runsc do inside a non-gVisor container.
This is used in contexts such as Dangerzone: https://gvisor.dev/blog/2024/09/23/safe-ride-into-the-dangerzone/ Updates issue #10944. PiperOrigin-RevId: 681229280
- Loading branch information
1 parent
b89f53b
commit 73cdb91
Showing
6 changed files
with
265 additions
and
4 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,228 @@ | ||
| // Copyright 2024 The gVisor Authors. | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
|
|
||
| // Package integration provides end-to-end integration tests for runsc. | ||
| package integration | ||
|
|
||
| import ( | ||
| "context" | ||
| "fmt" | ||
| "slices" | ||
| "strings" | ||
| "testing" | ||
|
|
||
| "github.com/docker/docker/api/types/mount" | ||
| "gvisor.dev/gvisor/pkg/test/dockerutil" | ||
| "gvisor.dev/gvisor/pkg/test/testutil" | ||
| ) | ||
|
|
||
| // testVariant is a variant of the gVisor in Docker test. | ||
| type testVariant struct { | ||
| Name string | ||
| User string | ||
| WorkDir string | ||
| CapAdd []string | ||
| Args []string | ||
| MountCgroupfs bool | ||
| } | ||
|
|
||
| // run runs the test variant. | ||
| func (test testVariant) run(ctx context.Context, logger testutil.Logger, runscPath string) (string, error) { | ||
| d := dockerutil.MakeNativeContainer(ctx, logger) | ||
| defer d.CleanUp(ctx) | ||
| opts := dockerutil.RunOpts{ | ||
| Image: "basic/integrationtest", | ||
| User: test.User, | ||
| WorkDir: test.WorkDir, | ||
| SecurityOpts: []string{ | ||
| // Disable default seccomp filter which blocks `mount(2)` and others. | ||
| "seccomp=unconfined", | ||
|
|
||
| // Disable AppArmor which also blocks mounts. | ||
| "apparmor=unconfined", | ||
|
|
||
| // Set correct SELinux label; this allows ptrace. | ||
| "label=type:container_engine_t", | ||
| }, | ||
| CapAdd: test.CapAdd, | ||
| Mounts: []mount.Mount{ | ||
| // Mount the runtime binary. | ||
| { | ||
| Type: mount.TypeBind, | ||
| Source: runscPath, | ||
| Target: "/runtime", | ||
| ReadOnly: true, | ||
| }, | ||
| }, | ||
| } | ||
| if test.MountCgroupfs { | ||
| opts.Mounts = append(opts.Mounts, mount.Mount{ | ||
| Type: mount.TypeBind, | ||
| Source: "/sys/fs/cgroup", | ||
| Target: "/sys/fs/cgroup", | ||
| ReadOnly: false, | ||
| }) | ||
| } | ||
| // Remove obstructed read-only masks over procfs so that `runsc` can | ||
| // mount a new instance of `procfs` in the chroot. | ||
| // TODO(gvisor.dev/issue/10944): Remove this once issue is fixed. | ||
| opts.SecurityOpts = append(opts.SecurityOpts, "--security-opt=systempaths=unconfined") | ||
| const wantMessage = "It became a jumble of words, a litany, almost a kind of glossolalia." | ||
| args := []string{ | ||
| "/runtime", | ||
| "--debug=true", | ||
| "--debug-log=/dev/stderr", | ||
| } | ||
| args = append(args, test.Args...) | ||
| args = append(args, "do", "/bin/echo", wantMessage) | ||
| logger.Logf("Running: %v", args) | ||
| got, err := d.Run(ctx, opts, args...) | ||
| got = strings.TrimSpace(got) | ||
| if err != nil { | ||
| return got, err | ||
| } | ||
| if !strings.Contains(got, wantMessage) { | ||
| return got, fmt.Errorf("did not observe substring %q in logs", wantMessage) | ||
| } | ||
| return got, nil | ||
| } | ||
|
|
||
| // failureCases returns modified versions of this same test that are expected | ||
| // to fail. Verifying that these variants fail ensures that each test variant | ||
| // runs with the minimal amount of deviations from the default configuration. | ||
| func (test testVariant) failureCases() []testVariant { | ||
| failureCase := func(name string) testVariant { | ||
| copy := test | ||
| copy.Name = name | ||
| return copy | ||
| } | ||
| var failureCases []testVariant | ||
| if test.MountCgroupfs { | ||
| copy := failureCase("without cgroupfs mounted") | ||
| copy.MountCgroupfs = false | ||
| failureCases = append(failureCases, copy) | ||
| } | ||
| for i, capAdd := range test.CapAdd { | ||
| copy := failureCase(fmt.Sprintf("without capability %s", capAdd)) | ||
| copy.CapAdd = append(append([]string(nil), test.CapAdd[:i]...), test.CapAdd[i+1:]...) | ||
| failureCases = append(failureCases, copy) | ||
| } | ||
| for _, tryRemoveArg := range []string{ | ||
| "--rootless=true", | ||
| "--ignore-cgroups=true", | ||
| } { | ||
| if index := slices.Index(test.Args, tryRemoveArg); index != -1 { | ||
| copy := failureCase(fmt.Sprintf("without argument %s", tryRemoveArg)) | ||
| copy.Args = append(append([]string(nil), test.Args[:index]...), test.Args[index+1:]...) | ||
| failureCases = append(failureCases, copy) | ||
| } | ||
| } | ||
| return failureCases | ||
| } | ||
|
|
||
| // TestGVisorInDocker runs `runsc` inside a non-gVisor container. | ||
| // This is used in contexts such as Dangerzone: | ||
| // https://gvisor.dev/blog/2024/09/23/safe-ride-into-the-dangerzone/ | ||
| func TestGVisorInDocker(t *testing.T) { | ||
| ctx := context.Background() | ||
| runscPath, err := dockerutil.RuntimePath() | ||
| if err != nil { | ||
| t.Fatalf("Cannot locate runtime path: %v", err) | ||
| } | ||
| for _, test := range []testVariant{ | ||
| { | ||
| Name: "Rootful", | ||
| User: "root", | ||
| CapAdd: []string{ | ||
| // Necessary to set up networking (creating veth devices). | ||
| "NET_ADMIN", | ||
| // Necessary to set up networking, which calls `ip netns add` which | ||
| // calls `mount(2)`. | ||
| "SYS_ADMIN", | ||
| }, | ||
| // Mount cgroupfs as writable, otherwise the runtime won't be able to | ||
| // set up cgroups. | ||
| MountCgroupfs: true, | ||
| }, | ||
| { | ||
| Name: "Rootful without networking", | ||
| User: "root", | ||
| CapAdd: []string{ | ||
| // "Can't run sandbox process in minimal chroot since we don't have CAP_SYS_ADMIN" | ||
| "SYS_ADMIN", | ||
| }, | ||
| Args: []string{ | ||
| "--network=none", | ||
| }, | ||
| MountCgroupfs: true, | ||
| }, | ||
| { | ||
| Name: "Rootful with host networking", | ||
| User: "root", | ||
| CapAdd: []string{ | ||
| // Necessary to set up networking (creating veth devices). | ||
| "NET_ADMIN", | ||
| // Necessary to set up networking, which calls `ip netns add` which | ||
| // calls `mount(2)`. | ||
| "SYS_ADMIN", | ||
| }, | ||
| Args: []string{ | ||
| "--network=host", | ||
| }, | ||
| MountCgroupfs: true, | ||
| }, | ||
| { | ||
| Name: "Rootful without networking and cgroupfs", | ||
| User: "root", | ||
| CapAdd: []string{ | ||
| // "Can't run sandbox process in minimal chroot since we don't have CAP_SYS_ADMIN" | ||
| "SYS_ADMIN", | ||
| }, | ||
| Args: []string{ | ||
| "--network=none", | ||
| "--ignore-cgroups=true", | ||
| }, | ||
| }, | ||
| { | ||
| Name: "Rootless", | ||
| User: "nonroot", | ||
| WorkDir: "/home/nonroot", | ||
| Args: []string{ | ||
| "--rootless=true", | ||
| }, | ||
| }, | ||
| { | ||
| Name: "Rootless without networking", | ||
| User: "nonroot", | ||
| WorkDir: "/home/nonroot", | ||
| Args: []string{ | ||
| "--rootless=true", | ||
| "--network=none", | ||
| }, | ||
| }, | ||
| } { | ||
| t.Run(test.Name, func(t *testing.T) { | ||
| if logs, err := test.run(ctx, t, runscPath); err != nil { | ||
| t.Fatalf("Error: %v; logs:\n%s", err, logs) | ||
| } | ||
| for _, failureCase := range test.failureCases() { | ||
| t.Run(failureCase.Name, func(t *testing.T) { | ||
| if logs, err := failureCase.run(ctx, t, runscPath); err == nil { | ||
| t.Fatalf("Failure case unexpectedly succeeded; logs:\n%s", logs) | ||
| } | ||
| }) | ||
| } | ||
| }) | ||
| } | ||
| } |