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2020-06-16Print spec as json when --debug is enabledFabricio Voznika
The previous format skipped many important structs that are pointers, especially for cgroups. Change to print as json, removing parts of the spec that are not relevant. Also removed debug message from gofer that can be very noisy when directories are large. PiperOrigin-RevId: 316713267
2020-06-01More runsc changes for VFS2Fabricio Voznika
- Add /tmp handling - Apply mount options - Enable more container_test tests - Forward signals to child process when test respaws process to run as root inside namespace. Updates #1487 PiperOrigin-RevId: 314263281
2020-05-28Move Cleanup to its own packageFabricio Voznika
PiperOrigin-RevId: 313663382
2020-05-28Automated rollback of changelist 309082540Fabricio Voznika
PiperOrigin-RevId: 313636920
2020-04-26refactor and add test for bindmountmoricho
Signed-off-by: moricho <ikeda.morito@gmail.com>
2020-04-10Add logging message for noNewPrivileges OCI option.Ian Lewis
noNewPrivileges is ignored if set to false since gVisor assumes that PR_SET_NO_NEW_PRIVS is always enabled. PiperOrigin-RevId: 305991947
2020-04-07Add friendlier messages for frequently encountered errors.Ian Lewis
Issue #2270 Issue #1765 PiperOrigin-RevId: 305385436
2020-03-12Kill sandbox process when parent process terminatesFabricio Voznika
When the sandbox runs in attached more, e.g. runsc do, runsc run, the sandbox lifetime is controlled by the parent process. This wasn't working in all cases because PR_GET_PDEATHSIG doesn't propagate through execve when the process changes uid/gid. So it was getting dropped when the sandbox execve's to change to user nobody. PiperOrigin-RevId: 300601247
2020-01-27Standardize on tools directory.Adin Scannell
PiperOrigin-RevId: 291745021
2019-10-22Merge pull request #1046 from tomlanyon:criogVisor bot
PiperOrigin-RevId: 276172466
2019-10-20Add runsc OCI annotations to support CRI-O.Tom Lanyon
Obligatory https://xkcd.com/927 Fixes #626
2019-10-10Update TODO for OCI seccomp support.Ian Lewis
PiperOrigin-RevId: 274042343
2019-10-01Merge pull request #917 from KentaTada:fix-clone-flagsgVisor bot
PiperOrigin-RevId: 272262368
2019-10-01Prevent CAP_NET_RAW from appearing in execFabricio Voznika
'docker exec' was getting CAP_NET_RAW even when --net-raw=false because it was not filtered out from when copying container's capabilities. PiperOrigin-RevId: 272260451
2019-09-26runsc: add the clone flag of cgroup namespaceKenta Tada
Signed-off-by: Kenta Tada <Kenta.Tada@sony.com>
2019-09-16Bring back to life features lost in recent refactorFabricio Voznika
- Sandbox logs are generated when running tests - Kokoro uploads the sandbox logs - Supports multiple parallel runs - Revive script to install locally built runsc with docker PiperOrigin-RevId: 269337274
2019-09-05Ignore the root container when calculating oom_score_adj for the sandbox.Ian Lewis
This is done because the root container for CRI is the infrastructure (pause) container and always gets a low oom_score_adj. We do this to ensure that only the oom_score_adj of user containers is used to calculated the sandbox oom_score_adj. Implemented in runsc rather than the containerd shim as it's a bit cleaner to implement here (in the shim it would require overwriting the oomScoreAdj and re-writing out the config.json again). This processing is Kubernetes(CRI) specific but we are currently only supporting CRI for multi-container support anyway. PiperOrigin-RevId: 267507706
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
2019-06-27Fix various spelling issues in the documentationMichael Pratt
Addresses obvious typos, in the documentation only. COPYBARA_INTEGRATE_REVIEW=https://github.com/google/gvisor/pull/443 from Pixep:fix/documentation-spelling 4d0688164eafaf0b3010e5f4824b35d1e7176d65 PiperOrigin-RevId: 255477779
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
2019-06-12Allow 'runsc do' to run without rootFabricio Voznika
'--rootless' flag lets a non-root user execute 'runsc do'. The drawback is that the sandbox and gofer processes will run as root inside a user namespace that is mapped to the caller's user, intead of nobody. And network is defaulted to '--network=host' inside the root network namespace. On the bright side, it's very convenient for testing: runsc --rootless do ls runsc --rootless do curl www.google.com PiperOrigin-RevId: 252840970
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
2019-05-16tiny fix: avoid panicing when OpenSpec failedLiu Hua
Signed-off-by: Liu Hua <sdu.liu@huawei.com> Change-Id: I11a4620394a10a7d92036b0341e0c21ad50bd122 PiperOrigin-RevId: 248621810
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
2019-04-29Allow and document bug ids in gVisor codebase.Nicolas Lacasse
PiperOrigin-RevId: 245818639 Change-Id: I03703ef0fb9b6675955637b9fe2776204c545789
2019-04-26Make raw sockets a toggleable feature disabled by default.Kevin Krakauer
PiperOrigin-RevId: 245511019 Change-Id: Ia9562a301b46458988a6a1f0bbd5f07cbfcb0615
2019-04-04gvisor: Add support for the MS_NOEXEC mount optionAndrei Vagin
https://github.com/google/gvisor/issues/145 PiperOrigin-RevId: 242044115 Change-Id: I8f140fe05e32ecd438b6be218e224e4b7fe05878
2019-04-01Add release hook and version flagAdin Scannell
PiperOrigin-RevId: 241421671 Change-Id: Ic0cebfe3efd458dc42c49f7f812c13318705199a
2019-03-20Fail in case mount option is unknownFabricio Voznika
PiperOrigin-RevId: 239425816 Change-Id: I3b1479c61b4222c3931a416c4efc909157044330
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
2019-01-31Remove license commentsMichael Pratt
Nothing reads them and they can simply get stale. Generated with: $ sed -i "s/licenses(\(.*\)).*/licenses(\1)/" **/BUILD PiperOrigin-RevId: 231818945 Change-Id: Ibc3f9838546b7e94f13f217060d31f4ada9d4bf0
2019-01-22Don't bind-mount runsc into a sandbox mntnsAndrei Vagin
PiperOrigin-RevId: 230437407 Change-Id: Id9d8ceeb018aad2fe317407c78c6ee0f4b47aa2b
2019-01-09Restore to original cgroup after sandbox and gofer processes are createdFabricio Voznika
The original code assumed that it was safe to join and not restore cgroup, but Container.Run will not exit after calling start, making cgroup cleanup fail because there were still processes inside the cgroup. PiperOrigin-RevId: 228529199 Change-Id: I12a48d9adab4bbb02f20d71ec99598c336cbfe51
2018-12-10Open source system call tests.Brian Geffon
PiperOrigin-RevId: 224886231 Change-Id: I0fccb4d994601739d8b16b1d4e6b31f40297fb22
2018-11-20Internal change.Nicolas Lacasse
PiperOrigin-RevId: 221848471 Change-Id: I882fbe5ce7737048b2e1f668848e9c14ed355665
2018-11-14Internal change.Nicolas Lacasse
PiperOrigin-RevId: 221462069 Change-Id: Id469ed21fe12e582c78340189b932989afa13c67
2018-11-13Internal change.Nicolas Lacasse
PiperOrigin-RevId: 221343421 Change-Id: I418b5204c5ed4fe1e0af25ef36ee66b9b571928e
2018-10-23Track paths and provide a rename hook.Adin Scannell
This change also adds extensive testing to the p9 package via mocks. The sanity checks and type checks are moved from the gofer into the core package, where they can be more easily validated. PiperOrigin-RevId: 218296768 Change-Id: I4fc3c326e7bf1e0e140a454cbacbcc6fd617ab55
2018-10-19Use correct company name in copyright headerIan Gudger
PiperOrigin-RevId: 217951017 Change-Id: Ie08bf6987f98467d07457bcf35b5f1ff6e43c035
2018-10-18Resolve mount paths while setting up root fs mountFabricio Voznika
It's hard to resolve symlinks inside the sandbox because rootfs and mounts may be read-only, forcing us to create mount points inside lower layer of an overlay, **before** the volumes are mounted. Since the destination must already be resolved outside the sandbox when creating mounts, take this opportunity to rewrite the spec with paths resolved. "runsc boot" will use the "resolved" spec to load mounts. In addition, symlink traversals were disabled while mounting containers inside the sandbox. It haven't been able to write a good test for it. So I'm relying on manual tests for now. PiperOrigin-RevId: 217749904 Change-Id: I7ac434d5befd230db1488446cda03300cc0751a9
2018-10-11Make debug log file name configurableFabricio Voznika
This is a breaking change if you're using --debug-log-dir. The fix is to replace it with --debug-log and add a '/' at the end: --debug-log-dir=/tmp/runsc ==> --debug-log=/tmp/runsc/ PiperOrigin-RevId: 216761212 Change-Id: I244270a0a522298c48115719fa08dad55e34ade1
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
2018-09-28Switch to root in userns when CAP_SYS_CHROOT is also missingFabricio Voznika
Some tests check current capabilities and re-run the tests as root inside userns if required capabibilities are missing. It was checking for CAP_SYS_ADMIN only, CAP_SYS_CHROOT is also required now. PiperOrigin-RevId: 214949226 Change-Id: Ic81363969fa76c04da408fae8ea7520653266312
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
2018-09-19Add docker command line args support for --cpuset-cpus and --cpusLingfu
`docker run --cpuset-cpus=/--cpus=` will generate cpu resource info in config.json (runtime spec file). When nginx worker_connections is configured as auto, the worker is generated according to the number of CPUs. If the cgroup is already set on the host, but it is not displayed correctly in the sandbox, performance may be degraded. This patch can get cpus info from spec file and apply to sentry on bootup, so the /proc/cpuinfo can show the correct cpu numbers. `lscpu` and other commands rely on `/sys/devices/system/cpu/online` are also affected by this patch. e.g. --cpuset-cpus=2,3 -> cpu number:2 --cpuset-cpus=4-7 -> cpu number:4 --cpus=2.8 -> cpu number:3 --cpus=0.5 -> cpu number:1 Change-Id: Ideb22e125758d4322a12be7c51795f8018e3d316 PiperOrigin-RevId: 213685199
2018-09-07runsc: Support multi-container exec.Nicolas Lacasse
We must use a context.Context with a Root Dirent that corresponds to the container's chroot. Previously we were using the root context, which does not have a chroot. Getting the correct context required refactoring some of the path-lookup code. We can't lookup the path without a context.Context, which requires kernel.CreateProcArgs, which we only get inside control.Execute. So we have to do the path lookup much later than we previously were. PiperOrigin-RevId: 212064734 Change-Id: I84a5cfadacb21fd9c3ab9c393f7e308a40b9b537
2018-09-07runsc: Run sandbox process inside minimal chroot.Nicolas Lacasse
We construct a dir with the executable bind-mounted at /exe, and proc mounted at /proc. Runsc now executes the sandbox process inside this chroot, thus limiting access to the host filesystem. The mounts and chroot dir are removed when the sandbox is destroyed. Because this requires bind-mounts, we can only do the chroot if we have CAP_SYS_ADMIN. PiperOrigin-RevId: 211994001 Change-Id: Ia71c515e26085e0b69b833e71691830148bc70d1
2018-09-05runsc: Promote getExecutablePathInternal to getExecutablePath.Nicolas Lacasse
Remove GetExecutablePath (the non-internal version). This makes path handling more consistent between exec, root, and child containers. The new getExecutablePath now uses MountNamespace.FindInode, which is more robust than Walking the Dirent tree ourselves. This also removes the last use of lstat(2) in the sentry, so that can be removed from the filters. PiperOrigin-RevId: 211683110 Change-Id: Ic8ec960fc1c267aa7d310b8efe6e900c88a9207a
2018-09-04runsc: Run sandbox as user nobody.Nicolas Lacasse
When starting a sandbox without direct file or network access, we create an empty user namespace and run the sandbox in there. However, the root user in that namespace is still mapped to the root user in the parent namespace. This CL maps the "nobody" user from the parent namespace into the child namespace, and runs the sandbox process as user "nobody" inside the new namespace. PiperOrigin-RevId: 211572223 Change-Id: I1b1f9b1a86c0b4e7e5ca7bc93be7d4887678bab6
2018-09-04runsc: Pass log and config files to sandbox process by FD.Nicolas Lacasse
This is a prereq for running the sandbox process as user "nobody", when it may not have permissions to open these files. Instead, we must open then before starting the sandbox process, and pass them by FD. The specutils.ReadSpecFromFile method was fixed to always seek to the beginning of the file before reading. This allows Files from the same FD to be read multiple times, as we do in the boot command when the apply-caps flag is set. Tested with --network=host. PiperOrigin-RevId: 211570647 Change-Id: I685be0a290aa7f70731ebdce82ebc0ebcc9d475c
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