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path: root/runsc/cmd/gofer.go
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2021-03-08Internal change.Chong Cai
PiperOrigin-RevId: 361689477
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
2020-09-17Remove option to panic goferFabricio Voznika
Gofer panics are suppressed by p9 server and an error is returned to the caller, making it effectively the same as returning EROFS. PiperOrigin-RevId: 332282959
2020-09-01Let flags be overriden from OCI annotationsFabricio Voznika
This allows runsc flags to be set per sandbox instance. For example, K8s pod annotations can be used to enable --debug for a single pod, making troubleshoot much easier. Similarly, features like --vfs2 can be enabled for experimentation without affecting other pods in the node. Closes #3494 PiperOrigin-RevId: 329542815
2020-08-19Move boot.Config to its own packageFabricio Voznika
Updates #3494 PiperOrigin-RevId: 327548511
2020-06-09Mount root and volumes as read-only if --overlay is enabledFabricio Voznika
PiperOrigin-RevId: 315583963
2020-06-01Make gofer mount readonly when overlay is enabledFabricio Voznika
No writes are expected to the underlying filesystem when using --overlay. PiperOrigin-RevId: 314171457
2020-04-08Clean up TODOsFabricio Voznika
PiperOrigin-RevId: 305592245
2020-03-19Improve error message when pivot_root failsFabricio Voznika
PiperOrigin-RevId: 301949722
2020-02-10Add flag package to limit visibility.Adin Scannell
PiperOrigin-RevId: 294297004
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
2019-10-16Fix problem with open FD when copy up is triggered in overlayfsFabricio Voznika
Linux kernel before 4.19 doesn't implement a feature that updates open FD after a file is open for write (and is copied to the upper layer). Already open FD will continue to read the old file content until they are reopened. This is especially problematic for gVisor because it caches open files. Flag was added to force readonly files to be reopenned when the same file is open for write. This is only needed if using kernels prior to 4.19. Closes #1006 It's difficult to really test this because we never run on tests on older kernels. I'm adding a test in GKE which uses kernels with the overlayfs problem for 1.14 and lower. PiperOrigin-RevId: 275115289
2019-10-11Set base to rootDavor Kapsa
2019-10-10Remove unnecessary assignment to pathDavor Kapsa
2019-09-24Refactor command line options and remove the allowed terminology for udsRobert Tonic
2019-09-19Fix documentation, clean up seccomp filter installation, rename helpers.Robert Tonic
Filter installation has been streamlined and functions renamed. Documentation has been fixed to be standards compliant, and missing documentation added. gofmt has also been applied to modified files.
2019-09-19Place the host UDS mounting behind --fsgofer-host-uds-allowed.Robert Tonic
This commit allows the use of the `--fsgofer-host-uds-allowed` flag to enable mounting sockets and add the appropriate seccomp filters.
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
2019-04-29Change 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
2019-03-28gofer: some fixs in setupRootFSLiu Hua
1.use root instead of spec.Root.path as mountpoint 2.put remount readonly logic ahead to avoid device busy errors Signed-off-by: Liu Hua <sdu.liu@huawei.com> Change-Id: I9222b4695f917136a97b0898ac6f75fcff296e5d PiperOrigin-RevId: 240818182
2019-03-18Add support for mount propagationFabricio Voznika
Properly handle propagation options for root and mounts. Now usage of mount options shared, rshared, and noexec cause error to start. shared/ rshared breaks sandbox=>host isolation. slave however can be supported because changes propagate from host to sandbox. Root FS setup moved inside the gofer. Apart from simplifying the code, it keeps all mounts inside the namespace. And they are torn down when the namespace is destroyed (DestroyFS is no longer needed). PiperOrigin-RevId: 239037661 Change-Id: I8b5ee4d50da33c042ea34fa68e56514ebe20e6e0
2019-01-31gvisor/gofer: Use pivot_root instead of chrootAndrei Vagin
PiperOrigin-RevId: 231864273 Change-Id: I8545b72b615f5c2945df374b801b80be64ec3e13
2019-01-18Scrub runsc error messagesFabricio Voznika
Removed "error" and "failed to" prefix that don't add value from messages. Adjusted a few other messages. In particular, when the container fail to start, the message returned is easier for humans to read: $ docker run --rm --runtime=runsc alpine foobar docker: Error response from daemon: OCI runtime start failed: <path> did not terminate sucessfully: starting container: starting root container [foobar]: starting sandbox: searching for executable "foobar", cwd: "/", $PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin": no such file or directory Closes #77 PiperOrigin-RevId: 230022798 Change-Id: I83339017c70dae09e4f9f8e0ea2e554c4d5d5cd1
2018-11-28Internal change.Googler
PiperOrigin-RevId: 223231273 Change-Id: I8fb97ea91f7507b4918f7ce6562890611513fc30
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
2018-10-31Make lazy open the mode of operation for fsgoferFabricio Voznika
With recent changes to 9P server, path walks are now safe inside open, create, rename and setattr calls. To simplify the code, remove the lazyopen=false mode that was used for bind mounts, and converge all mounts to using lazy open. PiperOrigin-RevId: 219508628 Change-Id: I073e7e1e2e9a9972d150eaf4cb29e553997a9b76
2018-10-19Use correct company name in copyright headerIan Gudger
PiperOrigin-RevId: 217951017 Change-Id: Ie08bf6987f98467d07457bcf35b5f1ff6e43c035
2018-09-19Fix sandbox and gofer capabilitiesFabricio Voznika
Capabilities.Set() adds capabilities, but doesn't remove existing ones that might have been loaded. Fixed the code and added tests. PiperOrigin-RevId: 213726369 Change-Id: Id7fa6fce53abf26c29b13b9157bb4c6616986fba
2018-09-04runsc: fix container rootfs path.Lantao Liu
PiperOrigin-RevId: 211515350 Change-Id: Ia495af57447c799909aa97bb873a50b87bee2625
2018-08-30Add seccomp filter to fsgoferFabricio Voznika
PiperOrigin-RevId: 211011542 Change-Id: Ib5a83a00f8eb6401603c6fb5b59afc93bac52558
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
2018-08-24Add option to panic gofer if writes are attempted over RO mountsFabricio Voznika
This is used when '--overlay=true' to guarantee writes are not sent to gofer. PiperOrigin-RevId: 210116288 Change-Id: I7616008c4c0e8d3668e07a205207f46e2144bf30
2018-08-15runsc fsgofer: Support dynamic serving of filesystems.Kevin Krakauer
When multiple containers run inside a sentry, each container has its own root filesystem and set of mounts. Containers are also added after sentry boot rather than all configured and known at boot time. The fsgofer needs to be able to serve the root filesystem of each container. Thus, it must be possible to add filesystems after the fsgofer has already started. This change: * Creates a URPC endpoint within the gofer process that listens for requests to serve new content. * Enables the sentry, when starting a new container, to add the new container's filesystem. * Mounts those new filesystems at separate roots within the sentry. PiperOrigin-RevId: 208903248 Change-Id: Ifa91ec9c8caf5f2f0a9eead83c4a57090ce92068
2018-06-28Error out if spec is invalidFabricio Voznika
Closes #66 PiperOrigin-RevId: 202496258 Change-Id: Ib9287c5bf1279ffba1db21ebd9e6b59305cddf34
2018-06-26runsc: set gofer umask to 0.Lantao Liu
PiperOrigin-RevId: 202185642 Change-Id: I2eefcc0b2ffadc6ef21d177a8a4ab0cda91f3399
2018-06-21Fix typo in runsc gofer flag descriptionIan Gudger
PiperOrigin-RevId: 201529295 Change-Id: I55eb516ec6d14fbcd48593a3d61f724adc253a23
2018-06-08Drop capabilities not needed by GoferFabricio Voznika
PiperOrigin-RevId: 199808391 Change-Id: Ib37a4fb6193dc85c1f93bc16769d6aa41854b9d4
2018-04-28Check in gVisor.Googler
PiperOrigin-RevId: 194583126 Change-Id: Ica1d8821a90f74e7e745962d71801c598c652463
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