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path: root/runsc/boot/loader_test.go
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2021-03-18Skip /dev submount hack on VFS2.Jamie Liu
containerd usually configures both /dev and /dev/shm as tmpfs mounts, e.g.: ``` "mounts": [ ... { "destination": "/dev", "type": "tmpfs", "source": "/run/containerd/io.containerd.runtime.v2.task/moby/10eedbd6a0e7937ddfcab90f2c25bd9a9968b734c4ae361318142165d445e67e/tmpfs", "options": [ "nosuid", "strictatime", "mode=755", "size=65536k" ] }, ... { "destination": "/dev/shm", "type": "tmpfs", "source": "/run/containerd/io.containerd.runtime.v2.task/moby/10eedbd6a0e7937ddfcab90f2c25bd9a9968b734c4ae361318142165d445e67e/shm", "options": [ "nosuid", "noexec", "nodev", "mode=1777", "size=67108864" ] }, ... ``` (This is mostly consistent with how Linux is usually configured, except that /dev is conventionally devtmpfs, not regular tmpfs. runc/libcontainer implements OCI-runtime-spec-undocumented behavior to create /dev/{ptmx,fd,stdin,stdout,stderr} in non-bind /dev mounts. runsc silently switches /dev to devtmpfs. In VFS1, this is necessary to get device files like /dev/null at all, since VFS1 doesn't support real device special files, only what is hardcoded in devfs. VFS2 does support device special files, but using devtmpfs is the easiest way to get pre-created files in /dev.) runsc ignores many /dev submounts in the spec, including /dev/shm. In VFS1, this appears to be to avoid introducing a submount overlay for /dev, and is mostly fine since the typical mode for the /dev/shm mount is ~consistent with the mode of the /dev/shm directory provided by devfs (modulo the sticky bit). In VFS2, this is vestigial (VFS2 does not use submount overlays), and devtmpfs' /dev/shm mode is correct for the mount point but not the mount. So turn off this behavior for VFS2. After this change: ``` $ docker run --rm -it ubuntu:focal ls -lah /dev/shm total 0 drwxrwxrwt 2 root root 40 Mar 18 00:16 . drwxr-xr-x 5 root root 360 Mar 18 00:16 .. $ docker run --runtime=runsc --rm -it ubuntu:focal ls -lah /dev/shm total 0 drwxrwxrwx 1 root root 0 Mar 18 00:16 . dr-xr-xr-x 1 root root 0 Mar 18 00:16 .. $ docker run --runtime=runsc-vfs2 --rm -it ubuntu:focal ls -lah /dev/shm total 0 drwxrwxrwt 2 root root 40 Mar 18 00:16 . drwxr-xr-x 5 root root 320 Mar 18 00:16 .. ``` Fixes #5687 PiperOrigin-RevId: 363699385
2021-03-06[op] Replace syscall package usage with golang.org/x/sys/unix in runsc/.Ayush Ranjan
The syscall package has been deprecated in favor of golang.org/x/sys. Note that syscall is still used in some places because the following don't seem to have an equivalent in unix package: - syscall.SysProcIDMap - syscall.Credential Updates #214 PiperOrigin-RevId: 361381490
2020-10-20Add /dev to mandatory mounts testFabricio Voznika
PiperOrigin-RevId: 338072845
2020-10-13[vfs2] Don't take reference in Task.MountNamespaceVFS2 and MountNamespace.Root.Dean Deng
This fixes reference leaks related to accidentally forgetting to DecRef() after calling one or the other. PiperOrigin-RevId: 336918922
2020-10-05Enable more VFS2 testsFabricio Voznika
Updates #1487 PiperOrigin-RevId: 335516732
2020-09-08Honor readonly flag for root mountFabricio Voznika
Updates #1487 PiperOrigin-RevId: 330580699
2020-09-04Simplify FD handling for container start/execFabricio Voznika
VFS1 and VFS2 host FDs have different dupping behavior, making error prone to code for both. Change the contract so that FDs are released as they are used, so the caller can simple defer a block that closes all remaining files. This also addresses handling of partial failures. With this fix, more VFS2 tests can be enabled. Updates #1487 PiperOrigin-RevId: 330112266
2020-08-26Make flag propagation automaticFabricio Voznika
Use reflection and tags to provide automatic conversion from Config to flags. This makes adding new flags less error-prone, skips flags using default values (easier to read), and makes tests correctly use default flag values for test Configs. Updates #3494 PiperOrigin-RevId: 328662070
2020-08-19Move boot.Config to its own packageFabricio Voznika
Updates #3494 PiperOrigin-RevId: 327548511
2020-08-03Plumbing context.Context to DecRef() and Release().Nayana Bidari
context is passed to DecRef() and Release() which is needed for SO_LINGER implementation. PiperOrigin-RevId: 324672584
2020-07-14Prepare boot.Loader to support multi-container TTYFabricio Voznika
- Combine process creation code that is shared between root and subcontainer processes - Move root container information into a struct for clarity Updates #2714 PiperOrigin-RevId: 321204798
2020-07-08Add shared mount hints to VFS2Fabricio Voznika
Container restart test is disabled for VFS2 for now. Updates #1487 PiperOrigin-RevId: 320296401
2020-05-06Fix runsc syscall documentation generation.Adin Scannell
We can register any number of tables with any number of architectures, and need not limit the definitions to the architecture in question. This allows runsc to generate documentation for all architectures simultaneously. Similarly, this simplifies the VFSv2 patching process. PiperOrigin-RevId: 310224827
2020-05-04Mount VSFS2 filesystem using root credentialsFabricio Voznika
PiperOrigin-RevId: 309787938
2020-04-24VFS2: Get HelloWorld image tests to pass with VFS2Zach Koopmans
This change includes: - Modifications to loader_test.go to get TestCreateMountNamespace to pass with VFS2. - Changes necessary to get TestHelloWorld in image tests to pass with VFS2. This means runsc can run the hello-world container with docker on VSF2. Note: Containers that use sockets will not run with these changes. See "//test/image/...". Any tests here with sockets currently fail (which is all of them but HelloWorld). PiperOrigin-RevId: 308363072
2020-04-17Get /bin/true to run on VFS2Zach Koopmans
Included: - loader_test.go RunTest and TestStartSignal VFS2 - container_test.go TestAppExitStatus on VFS2 - experimental flag added to runsc to turn on VFS2 Note: shared mounts are not yet supported. PiperOrigin-RevId: 307070753
2020-04-14Merge pull request #2212 from aaronlu:dup_stdioFDsgVisor bot
PiperOrigin-RevId: 306477639
2020-01-27Update package locations.Adin Scannell
Because the abi will depend on the core types for marshalling (usermem, context, safemem, safecopy), these need to be flattened from the sentry directory. These packages contain no sentry-specific details. PiperOrigin-RevId: 291811289
2020-01-09New sync package.Ian Gudger
* Rename syncutil to sync. * Add aliases to sync types. * Replace existing usage of standard library sync package. This will make it easier to swap out synchronization primitives. For example, this will allow us to use primitives from github.com/sasha-s/go-deadlock to check for lock ordering violations. Updates #1472 PiperOrigin-RevId: 289033387
2019-08-27Mount volumes as super userFabricio Voznika
This used to be the case, but regressed after a recent change. Also made a few fixes around it and clean up the code a bit. Closes #720 PiperOrigin-RevId: 265717496
2019-08-02Stops container if gofer is killedFabricio Voznika
Each gofer now has a goroutine that polls on the FDs used to communicate with the sandbox. The respective gofer is destroyed if any of the FDs is closed. Closes #601 PiperOrigin-RevId: 261383725
2019-07-03Avoid importing platforms from many source filesAndrei Vagin
PiperOrigin-RevId: 256494243
2019-06-24fsgopher: reopen files via /proc/self/fdAndrei Vagin
When we reopen file by path, we can't be sure that we will open exactly the same file. The file can be deleted and another one with the same name can be created. PiperOrigin-RevId: 254898594
2019-06-13Update canonical repository.Adin Scannell
This can be merged after: https://github.com/google/gvisor-website/pull/77 or https://github.com/google/gvisor-website/pull/78 PiperOrigin-RevId: 253132620
2019-06-11Add support to mount pod shared tmpfs mountsFabricio Voznika
Parse annotations containing 'gvisor.dev/spec/mount' that gives hints about how mounts are shared between containers inside a pod. This information can be used to better inform how to mount these volumes inside gVisor. For example, a volume that is shared between containers inside a pod can be bind mounted inside the sandbox, instead of being two independent mounts. For now, this information is used to allow the same tmpfs mounts to be shared between containers which wasn't possible before. PiperOrigin-RevId: 252704037
2019-06-03Refactor container FS setupFabricio Voznika
No change in functionaly. Added containerMounter object to keep state while the mounts are processed. This will help upcoming changes to share mounts per-pod. PiperOrigin-RevId: 251350096
2019-05-15Cleanup around urpc file payload handlingFabricio Voznika
urpc always closes all files once the RPC function returns. PiperOrigin-RevId: 248406857 Change-Id: I400a8562452ec75c8e4bddc2154948567d572950
2019-04-29Change copyright notice to "The gVisor Authors"Michael Pratt
Based on the guidelines at https://opensource.google.com/docs/releasing/authors/. 1. $ rg -l "Google LLC" | xargs sed -i 's/Google LLC.*/The gVisor Authors./' 2. Manual fixup of "Google Inc" references. 3. Add AUTHORS file. Authors may request to be added to this file. 4. Point netstack AUTHORS to gVisor AUTHORS. Drop CONTRIBUTORS. Fixes #209 PiperOrigin-RevId: 245823212 Change-Id: I64530b24ad021a7d683137459cafc510f5ee1de9
2019-03-13Allow filesystem.Mount to take an optional interface argument.Nicolas Lacasse
PiperOrigin-RevId: 238360231 Change-Id: I5eaf8d26f8892f77d71c7fbd6c5225ef471cedf1
2019-01-16Prevent internal tmpfs mount to override files in /tmpFabricio Voznika
Runsc wants to mount /tmp using internal tmpfs implementation for performance. However, it risks hiding files that may exist under /tmp in case it's present in the container. Now, it only mounts over /tmp iff: - /tmp was not explicitly asked to be mounted - /tmp is empty If any of this is not true, then /tmp maps to the container's image /tmp. Note: checkpoint doesn't have sentry FS mounted to check if /tmp is empty. It simply looks for explicit mounts right now. PiperOrigin-RevId: 229607856 Change-Id: I10b6dae7ac157ef578efc4dfceb089f3b94cde06
2018-12-04Max link traversals should be for an entire path.Brian Geffon
The number of symbolic links that are allowed to be followed are for a full path and not just a chain of symbolic links. PiperOrigin-RevId: 224047321 Change-Id: I5e3c4caf66a93c17eeddcc7f046d1e8bb9434a40
2018-11-01Use spec with clean paths for goferFabricio Voznika
Otherwise the gofer's attach point may be different from sandbox when there symlinks in the path. PiperOrigin-RevId: 219730492 Change-Id: Ia9c4c2d16228c6a1a9e790e0cb673fd881003fe1
2018-10-19Use correct company name in copyright headerIan Gudger
PiperOrigin-RevId: 217951017 Change-Id: Ie08bf6987f98467d07457bcf35b5f1ff6e43c035
2018-10-17Close the gofer socket gracefully in boot:boot_test.Nicolas Lacasse
We were closing the FD directly. If the test then created a new socket pair with the same FD, in-flight RPCs would get directed to the new socket and break the test. Instead, we should use unet.Socket.Close(), which allows any in-flight RPCs to finish. PiperOrigin-RevId: 217608491 Change-Id: I8c5a76638899ba30f33ca976e6fac967fa0aadbf
2018-10-11Fix reference leak in tests.Nicolas Lacasse
PiperOrigin-RevId: 216780438 Change-Id: Ide637fe36f8d2a61fea9e5b16d1b3401f2540416
2018-10-10Add sandbox to cgroupFabricio Voznika
Sandbox creation uses the limits and reservations configured in the OCI spec and set cgroup options accordinly. Then it puts both the sandbox and gofer processes inside the cgroup. It also allows the cgroup to be pre-configured by the caller. If the cgroup already exists, sandbox and gofer processes will join the cgroup but it will not modify the cgroup with spec limits. PiperOrigin-RevId: 216538209 Change-Id: If2c65ffedf55820baab743a0edcfb091b89c1019
2018-10-03runsc: Pass root container's stdio via FD.Nicolas Lacasse
We were previously using the sandbox process's stdio as the root container's stdio. This makes it difficult/impossible to distinguish output application output from sandbox output, such as panics, which are always written to stderr. Also close the console socket when we are done with it. PiperOrigin-RevId: 215585180 Change-Id: I980b8c69bd61a8b8e0a496fd7bc90a06446764e0
2018-09-27Refactor 'runsc boot' to take container ID as argumentFabricio Voznika
This makes the flow slightly simpler (no need to call Loader.SetRootContainer). And this is required change to tag tasks with container ID inside the Sentry. PiperOrigin-RevId: 214795210 Change-Id: I6ff4af12e73bb07157f7058bb15fd5bb88760884
2018-09-17runsc: Enable waiting on exited processes.Kevin Krakauer
This makes `runsc wait` behave more like waitpid()/wait4() in that: - Once a process has run to completion, you can wait on it and get its exit code. - Processes not waited on will consume memory (like a zombie process) PiperOrigin-RevId: 213358916 Change-Id: I5b5eca41ce71eea68e447380df8c38361a4d1558
2018-09-11platform: Pass device fd into platform constructor.Nicolas Lacasse
We were previously openining the platform device (i.e. /dev/kvm) inside the platfrom constructor (i.e. kvm.New). This requires that we have RW access to the platform device when constructing the platform. However, now that the runsc sandbox process runs as user "nobody", it is not able to open the platform device. This CL changes the kvm constructor to take the platform device FD, rather than opening the device file itself. The device file is opened outside of the sandbox and passed to the sandbox process. PiperOrigin-RevId: 212505804 Change-Id: I427e1d9de5eb84c84f19d513356e1bb148a52910
2018-09-07Remove '--file-access=direct' optionFabricio Voznika
It was used before gofer was implemented and it's not supported anymore. BREAKING CHANGE: proxy-shared and proxy-exclusive options are now: shared and exclusive. PiperOrigin-RevId: 212017643 Change-Id: If029d4073fe60583e5ca25f98abb2953de0d78fd
2018-08-27Put fsgofer inside chrootFabricio Voznika
Now each container gets its own dedicated gofer that is chroot'd to the rootfs path. This is done to add an extra layer of security in case the gofer gets compromised. PiperOrigin-RevId: 210396476 Change-Id: Iba21360a59dfe90875d61000db103f8609157ca0
2018-08-14runsc: Change cache policy for root fs and volume mounts.Nicolas Lacasse
Previously, gofer filesystems were configured with the default "fscache" policy, which caches filesystem metadata and contents aggressively. While this setting is best for performance, it means that changes from inside the sandbox may not be immediately propagated outside the sandbox, and vice-versa. This CL changes volumes and the root fs configuration to use a new "remote-revalidate" cache policy which tries to retain as much caching as possible while still making fs changes visible across the sandbox boundary. This cache policy is enabled by default for the root filesystem. The default value for the "--file-access" flag is still "proxy", but the behavior is changed to use the new cache policy. A new value for the "--file-access" flag is added, called "proxy-exclusive", which turns on the previous aggressive caching behavior. As the name implies, this flag should be used when the sandbox has "exclusive" access to the filesystem. All volume mounts are configured to use the new cache policy, since it is safest and most likely to be correct. There is not currently a way to change this behavior, but it's possible to add such a mechanism in the future. The configurability is a smaller issue for volumes, since most of the expensive application fs operations (walking + stating files) will likely served by the root fs. PiperOrigin-RevId: 208735037 Change-Id: Ife048fab1948205f6665df8563434dbc6ca8cfc9
2018-07-18Moved restore code out of create and made to be called after create.Justine Olshan
Docker expects containers to be created before they are restored. However, gVisor restoring requires specificactions regarding the kernel and the file system. These actions were originally in booting the sandbox. Now setting up the file system is deferred until a call to a call to runsc start. In the restore case, the kernel is destroyed and a new kernel is created in the same process, as we need the same process for Docker. These changes required careful execution of concurrent processes which required the use of a channel. Full docker integration still needs the ability to restore into the same container. PiperOrigin-RevId: 205161441 Change-Id: Ie1d2304ead7e06855319d5dc310678f701bd099f
2018-07-03runsc: Mount "mandatory" mounts right after mounting the root.Nicolas Lacasse
The /proc and /sys mounts are "mandatory" in the sense that they should be mounted in the sandbox even when they are not included in the spec. Runsc treats /tmp similarly, because it is faster to use the internal tmpfs implementation instead of proxying to the host. However, the spec may contain submounts of these mandatory mounts (particularly for /tmp). In those cases, we must mount our mandatory mounts before the submount, otherwise the submount will be masked. Since the mandatory mounts are all top-level directories, we can mount them right after the root. PiperOrigin-RevId: 203145635 Change-Id: Id69bae771d32c1a5b67e08c8131b73d9b42b2fbf
2018-06-29Sets the restore environment for restoring a container.Justine Olshan
Updated how restoring occurs through boot.go with a separate Restore function. This prevents a new process and new mounts from being created. Added tests to ensure the container is restored. Registered checkpoint and restore commands so they can be used. Docker support for these commands is still limited. Working on #80. PiperOrigin-RevId: 202710950 Change-Id: I2b893ceaef6b9442b1ce3743bd112383cb92af0c
2018-06-22runsc: Enable waiting on individual containers within a sandbox.Kevin Krakauer
PiperOrigin-RevId: 201742160 Change-Id: Ia9fa1442287c5f9e1196fb117c41536a80f6bb31
2018-06-21Added functionality to create a RestoreEnvironment.Justine Olshan
Before a container can be restored, the mounts must be configured. The root and submounts and their key information is compiled into a RestoreEnvironment. Future code will be added to set this created environment before restoring a container. Tests to ensure the correct environment were added. PiperOrigin-RevId: 201544637 Change-Id: Ia894a8b0f80f31104d1c732e113b1d65a4697087
2018-06-18Modified boot.go to allow for restores.Justine Olshan
A file descriptor was added as a flag to boot so a state file can restore a container that was checkpointed. PiperOrigin-RevId: 201068699 Change-Id: I18e96069488ffa3add468861397f3877725544aa
2018-06-15runsc: support /dev bind mount which does not conflict with default /dev mount.Lantao Liu
PiperOrigin-RevId: 200768923 Change-Id: I4b8da10bcac296e8171fe6754abec5aabfec5e65
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-18 14:34:10 +0000