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path: root/libpod/container_api.go
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* EXPERIMENTAL: Do not call out to runc for syncMatthew Heon2018-11-07
| | | | | | | | | | | | | | | When syncing container state, we normally call out to runc to see the container's status. This does have significant performance implications, though, and we've seen issues with large amounts of runc processes being spawned. This patch attempts to use stat calls on the container exit file created by Conmon instead to sync state. This massively decreases the cost of calling updateContainer (it has gone from an almost-unconditional fork/exec of runc to a single stat call that can be avoided in most states). Signed-off-by: Matthew Heon <matthew.heon@gmail.com>
* Merge pull request #1715 from baude/getusergroupOpenShift Merge Robot2018-10-30
|\ | | | | get user and group information using securejoin and runc's user library
| * get user and group information using securejoin and runc's user librarybaude2018-10-29
| | | | | | | | | | | | | | | | | | | | | | for the purposes of performance and security, we use securejoin to contstruct the root fs's path so that symlinks are what they appear to be and no pointing to something naughty. then instead of chrooting to parse /etc/passwd|/etc/group, we now use the runc user/group methods which saves us quite a bit of performance. Signed-off-by: baude <bbaude@redhat.com>
* | unmount: fix error logicValentin Rothberg2018-10-29
|/ | | | | | | | | Only return `ErrCtrStateInvalid` errors when the mount counter is equal to 1. Also fix the "can't unmount [...] last mount[..]" error which hasn't been returned when the error passed to `errors.Errorf()` is nil. Fixes: #1695 Signed-off-by: Valentin Rothberg <vrothberg@suse.com>
* Make podman ps fastbaude2018-10-23
| | | | | | Like Ricky Bobby, we want to go fast. Signed-off-by: baude <bbaude@redhat.com>
* Add support to checkpoint/restore containersAdrian Reber2018-10-03
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | runc uses CRIU to support checkpoint and restore of containers. This brings an initial checkpoint/restore implementation to podman. None of the additional runc flags are yet supported and container migration optimization (pre-copy/post-copy) is also left for the future. The current status is that it is possible to checkpoint and restore a container. I am testing on RHEL-7.x and as the combination of RHEL-7 and CRIU has seccomp troubles I have to create the container without seccomp. With the following steps I am able to checkpoint and restore a container: # podman run --security-opt="seccomp=unconfined" -d registry.fedoraproject.org/f27/httpd # curl -I 10.22.0.78:8080 HTTP/1.1 403 Forbidden # <-- this is actually a good answer # podman container checkpoint <container> # curl -I 10.22.0.78:8080 curl: (7) Failed connect to 10.22.0.78:8080; No route to host # podman container restore <container> # curl -I 10.22.0.78:8080 HTTP/1.1 403 Forbidden I am using CRIU, runc and conmon from git. All required changes for checkpoint/restore support in podman have been merged in the corresponding projects. To have the same IP address in the restored container as before checkpointing, CNI is told which IP address to use. If the saved network configuration cannot be found during restore, the container is restored with a new IP address. For CRIU to restore established TCP connections the IP address of the network namespace used for restore needs to be the same. For TCP connections in the listening state the IP address can change. During restore only one network interface with one IP address is handled correctly. Support to restore containers with more advanced network configuration will be implemented later. v2: * comment typo * print debug messages during cleanup of restore files * use createContainer() instead of createOCIContainer() * introduce helper CheckpointPath() * do not try to restore a container that is paused * use existing helper functions for cleanup * restructure code flow for better readability * do not try to restore if checkpoint/inventory.img is missing * git add checkpoint.go restore.go v3: * move checkpoint/restore under 'podman container' v4: * incorporated changes from latest reviews Signed-off-by: Adrian Reber <areber@redhat.com>
* Add ContainerStateExited and OCI delete() in cleanup()Matthew Heon2018-10-02
| | | | | | | | | | | | | | | | To work better with Kata containers, we need to delete() from the OCI runtime as a part of cleanup, to ensure resources aren't retained longer than they need to be. To enable this, we need to add a new state to containers, ContainerStateExited. Containers transition from ContainerStateStopped to ContainerStateExited via cleanupRuntime which is invoked as part of cleanup(). A container in the Exited state is identical to Stopped, except it has been removed from the OCI runtime and thus will be handled differently when initializing the container. Signed-off-by: Matthew Heon <matthew.heon@gmail.com>
* Refactor Wait() to not require a timeoutMatthew Heon2018-09-21
| | | | | | | | | | | We added a timeout for convenience, but most invocations don't care about it. Refactor it into WaitWithTimeout() and add a Wait() that doesn't require a timeout and uses the default. Signed-off-by: Matthew Heon <matthew.heon@gmail.com> Closes: #1527 Approved by: mheon
* Increase pidWaitTimeout to 1000msEmilien Macchi2018-09-18
| | | | | | | | | | | | | | | | | When managing the containers with systemd, it takes a bit more than 250ms to have podman creating the pidfile. Increasing the value to 1 second will avoid timeout issues when running a lot of containers managed by systemd. This patch was tested in a VM with 56 services (OpenStack) deployed by TripleO and managed by systemd. Fixes #1495 Signed-off-by: Emilien Macchi <emilien@redhat.com> Closes: #1497 Approved by: rhatdan
* Add --interval flag to podman waitDaniel J Walsh2018-09-13
| | | | | | | Waiting uses a lot of CPU, so drop back to checking once/second and allow user to pass in the interval. Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>
* Up time between checks for podman waitMatthew Heon2018-08-31
| | | | | | | | | Prior to this patch, we were polling continuously to check if a container had died. This patch changes this to poll 10 times a second, which should be more than sufficient and drastically reduce CPU utilization. Signed-off-by: Matthew Heon <matthew.heon@gmail.com>
* rootless: exec handle processes that create an user namespaceGiuseppe Scrivano2018-08-26
| | | | | | | | | | | | | | Manage the case where the main process of the container creates and joins a new user namespace. In this case we want to join only the first child in the new hierarchy, which is the user namespace that was used to create the container. Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com> Closes: #1331 Approved by: rhatdan
* Properly translate users into runc format for execMatthew Heon2018-08-23
| | | | | | | | | | | Runc exec expects the --user flag to be formatted as UID:GID. Use chrootuser code to translate whatever user is passed to exec into this format. Signed-off-by: Matthew Heon <matthew.heon@gmail.com> Closes: #1315 Approved by: vrothberg
* switch projectatomic to containersDaniel J Walsh2018-08-16
| | | | | | | | | | Need to get some small changes into libpod to pull back into buildah to complete buildah transition. Signed-off-by: Daniel J Walsh <dwalsh@redhat.com> Closes: #1270 Approved by: mheon
* We need to sort mounts so that one mount does not over mount another.Daniel J Walsh2018-08-10
| | | | | | | | | | | | | | | | | Currently we add mounts from images, volumes and internal. We can accidently over mount an existing mount. This patch sorts the mounts to make sure a parent directory is always mounted before its content. Had to change the default propagation on image volume mounts from shared to private to stop mount points from leaking out of the container. Also switched from using some docker/docker/pkg to container/storage/pkg to remove some dependencies on Docker. Signed-off-by: Daniel J Walsh <dwalsh@redhat.com> Closes: #1243 Approved by: mheon
* Add --force to podman umount to force the unmounting of the rootfsDaniel J Walsh2018-08-01
| | | | | | | | | | | | podman umount will currently only unmount file system if not other process is using it, otherwise the umount decrements the container storage to indicate that the caller is no longer using the mount point, once the count gets to 0, the file system is actually unmounted. Signed-off-by: Daniel J Walsh <dwalsh@redhat.com> Closes: #1184 Approved by: TomSweeneyRedHat
* Added pod.Restart() functionality to libpod.haircommander2018-07-25
| | | | | | | | | | | Moved contents of RestartWithTimeout to restartWithTimeout in container_internal to be able to call restart without locking in function. Refactored startNode to be able to either start or restart a node. Built pod Restart() with new startNode with refresh true. Signed-off-by: haircommander <pehunt@redhat.com> Closes: #1152 Approved by: rhatdan
* Let containers/storage keep track of mountsDaniel J Walsh2018-07-19
| | | | | | | | | | | Currently we unmount storage that is still in use. We should not be unmounting storeage that we mounted via a different command or by podman mount. This change relies on containers/storage to umount keep track of how many times the storage was mounted before really unmounting it from the system. Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>
* Allow Init() on stopped containersMatthew Heon2018-07-09
| | | | | | | Signed-off-by: Matthew Heon <mheon@redhat.com> Closes: #1068 Approved by: baude
* Make CGroups cleanup optional on whether they existMatthew Heon2018-06-22
| | | | | | | Signed-off-by: Matthew Heon <matthew.heon@gmail.com> Closes: #981 Approved by: baude
* Add Refresh() to ctrs to refresh state after db changeMatthew Heon2018-06-22
| | | | | | | | | | The Refresh() function is used to reset a container's state after a database format change to state is made that requires migration Signed-off-by: Matthew Heon <matthew.heon@gmail.com> Closes: #981 Approved by: baude
* We are using err in defer function, needs to be defined nameDaniel J Walsh2018-06-22
| | | | | | | | | | Since we are checking if err is non nil in defer function we need to define it, so that the check will work correctly. Signed-off-by: Daniel J Walsh <dwalsh@redhat.com> Closes: #985 Approved by: mheon
* libpod: fix race with attach/startGiuseppe Scrivano2018-06-20
| | | | | | | | | | | Move the StartContainer call after the attach to the UNIX socket. It solves a race where the StartContainer could be done earlier and a short-lived container could already exit by the time we tried to attach to the socket. Closes: https://github.com/projectatomic/libpod/issues/835 Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>
* Optionally init() during container restartMatthew Heon2018-05-04
| | | | | | | | | | | This allows us to restart containers that have never been started without error. This makes RestartWithTimeout work with running, stopped, and created containers. Signed-off-by: Matthew Heon <matthew.heon@gmail.com> Closes: #719 Approved by: rhatdan
* varlink containersbaude2018-05-03
| | | | | | | | | | | | | first pass at adding in the container related endpoints/methods for the libpod backend. Couple of important notes: * endpoints that can use a console are not going to be done until we have "remote" console * several of the container methods should probably be able to stream as opposed to a one-off return Signed-off-by: baude <bbaude@redhat.com> Closes: #708 Approved by: baude
* Vendor in latest containers/image and contaners/storageumohnani82018-04-19
| | | | | | | | | Made necessary changes to functions to include contex.Context wherever needed Signed-off-by: umohnani8 <umohnani@redhat.com> Closes: #640 Approved by: baude
* Change container.locked to batchedTomSweeneyRedHat2018-04-16
| | | | | | | Signed-off-by: TomSweeneyRedHat <tsweeney@redhat.com> Closes: #619 Approved by: mheon
* Change attach to accept a struct containing streamsMatthew Heon2018-04-13
| | | | | | | | | | | Comparing Go interfaces, like io.Reader, to nil does not work. As such, we need to include a bool with each stream telling whether to attach to it. Signed-off-by: Matthew Heon <matthew.heon@gmail.com> Closes: #608 Approved by: baude
* Changes to attach to enable per-stream attachingMatthew Heon2018-04-13
| | | | | | | | | | This allows us to attach to attach to just stdout or stderr or stdin, or any combination of these. Signed-off-by: Matthew Heon <matthew.heon@gmail.com> Closes: #608 Approved by: baude
* Fix locking interaction in batched Exec() on containerMatthew Heon2018-04-13
| | | | | | | Signed-off-by: Matthew Heon <mheon@redhat.com> Closes: #610 Approved by: giuseppe
* Use buildah commit for podman commitbaude2018-04-10
| | | | | | | | Resolves: #586 and #520 Signed-off-by: baude <bbaude@redhat.com> Closes: #592 Approved by: mheon
* Stopping a stopped container should not be an errorbaude2018-04-03
| | | | | | | | | Resolves: #575 Signed-off-by: baude <bbaude@redhat.com> Closes: #588 Approved by: mheon
* Refactor dependency checks from init() into public APIMatthew Heon2018-04-03
| | | | | | | | | | | | | Instead of checking during init(), which could result in major locking issues when used with pods, make our dependency checks in the public API instead. This avoids doing them when we start pods (where, because of the dependency graph, we can reasonably say all dependencies are up before we start a container). Signed-off-by: Matthew Heon <matthew.heon@gmail.com> Closes: #577 Approved by: rhatdan
* Do not require Init() before Start()Matthew Heon2018-04-03
| | | | | | | | | This will help dependency races Signed-off-by: Matthew Heon <matthew.heon@gmail.com> Closes: #577 Approved by: rhatdan
* Stage 4 Image cleanupbaude2018-03-23
| | | | | | | | | | Cull funcs from runtime_img.go which are no longer needed. Also, fix any remaining spots that use the old image technique. Signed-off-by: baude <bbaude@redhat.com> Closes: #532 Approved by: mheon
* Image library stage 4 - create and commitbaude2018-03-20
| | | | | | | | | | Migrate the podman create and commit subcommandis to leverage the images library. I also had to migrate the cmd/ portions of run and rmi. Signed-off-by: baude <bbaude@redhat.com> Closes: #498 Approved by: mheon
* Remove ability to specify mount label when mountingMatthew Heon2018-03-16
| | | | | | | Signed-off-by: Matthew Heon <matthew.heon@gmail.com> Closes: #506 Approved by: rhatdan
* Add additional debug loggingMatthew Heon2018-03-15
| | | | | | | Signed-off-by: Matthew Heon <matthew.heon@gmail.com> Closes: #482 Approved by: baude
* Add StartAndAttach() API endpoint for containersMatthew Heon2018-03-15
| | | | | | | | | | | | This solves our prior problems with attach races by ensuring the order is correct. Also contains substantial cleanups to the attach code. Signed-off-by: Matthew Heon <matthew.heon@gmail.com> Closes: #482 Approved by: baude
* Implement container restartingMatthew Heon2018-03-15
| | | | | | | Signed-off-by: Matthew Heon <matthew.heon@gmail.com> Closes: #482 Approved by: baude
* Modify pod API to move Init() into Start()Matthew Heon2018-03-13
| | | | | | | | | | | | | Separate Init() and Start() does not make sense on the pod side, where we may have to start containers in order to initialize others due to dependency orders. Also adjusts internal containers API for more code sharing. Signed-off-by: Matthew Heon <matthew.heon@gmail.com> Closes: #478 Approved by: rhatdan
* Convert bind mounts to use DB fieldMatthew Heon2018-03-08
| | | | | | | | | | | | | | | Refactors creation of bind mounts into a separate function that can be called from elsewhere (e.g. pod start or container restart). This function stores the mounts in the DB using the field established last commit. Spec generation now relies upon this field in the DB instead of manually enumerating files to be bind mounted in. Signed-off-by: Matthew Heon <matthew.heon@gmail.com> Closes: #462 Approved by: baude
* Move internal function resizeTty to container_internalMatthew Heon2018-03-08
| | | | | | | Signed-off-by: Matthew Heon <matthew.heon@gmail.com> Closes: #462 Approved by: baude
* Refactor saving OCI spec to disk into separate functionMatthew Heon2018-03-08
| | | | | | | | | It will be needed for restarting containers Signed-off-by: Matthew Heon <matthew.heon@gmail.com> Closes: #462 Approved by: baude
* podman import, load, and commit are too verbosebaude2018-03-07
| | | | | | | | | | | | | | | The progress should not be show for import, load, and commit. It makes machine parsing of the output much more difficult. Also, each command should output an image ID or name for the user. Added a --verbose flag for users that still want to see progress. Resolves issue #450 Signed-off-by: baude <bbaude@redhat.com> Closes: #456 Approved by: rhatdan
* attach: set the terminal size and handle SIGWINCHGiuseppe Scrivano2018-03-06
| | | | | | | | | | | | Notify conmon when the terminal size changes. Use the same notification to set the correct initial size. Closes: https://github.com/projectatomic/libpod/issues/351 Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com> Closes: #448 Approved by: baude
* Replace usage of runc with runtimeMatthew Heon2018-03-01
| | | | | | | Signed-off-by: Matthew Heon <matthew.heon@gmail.com> Closes: #412 Approved by: baude
* Convert exec session tracking to use a dedicated structMatthew Heon2018-03-01
| | | | | | | | | | | This will behave better if we need to add anything to it at a later date - we can add fields to the struct without breaking existing BoltDB databases. Signed-off-by: Matthew Heon <matthew.heon@gmail.com> Closes: #412 Approved by: baude
* Fix gofmt & golintMatthew Heon2018-03-01
| | | | | | | Signed-off-by: Matthew Heon <matthew.heon@gmail.com> Closes: #412 Approved by: baude
* Relax locking in Exec()Matthew Heon2018-03-01
| | | | | | | | | | | This allows containers to be used by `ps` and other commands while they have ongoing exec sessions. Concurrent exec should also work but is not tested. Signed-off-by: Matthew Heon <matthew.heon@gmail.com> Closes: #412 Approved by: baude
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