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path: root/libpod/oci_conmon_linux.go
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* Add exit commands to exec sessionsMatthew Heon2020-05-20
| | | | | | | | | | | These are required for detached exec, where they will be used to clean up and remove exec sessions when they exit. As part of this, move all Exec related functionality for the Conmon OCI runtime into a separate file; the existing one was around 2000 lines. Signed-off-by: Matthew Heon <matthew.heon@pm.me>
* oci conmon: tell conmon to log container namePeter Hunt2020-05-20
| | | | | | | | | | specifying `-n=ctr-name` tells conmon to log CONTAINER_NAME=name if the log driver is journald add this, and a test! also, refactor the args slice creation to not append() unnecessarily. Signed-off-by: Peter Hunt <pehunt@redhat.com>
* Drop a debug line which could print very large messagesMatthew Heon2020-05-15
| | | | Signed-off-by: Matthew Heon <matthew.heon@pm.me>
* Remove duplicated exec handling codeMatthew Heon2020-05-14
| | | | | | | | | | | During the initial workup of HTTP exec, I duplicated most of the existing exec handling code so I could work on it without breaking normal exec (and compare what I was doing to the nroaml version). Now that it's done and working, we can switch over to the refactored version and ditch the original, removing a lot of duplicated code. Signed-off-by: Matthew Heon <matthew.heon@pm.me>
* Fix start order for APIv2 exec start endpointMatthew Heon2020-05-14
| | | | | | This makes the endpoint (mostly) functional. Signed-off-by: Matthew Heon <matthew.heon@pm.me>
* Add an initial implementation of HTTP-forwarded execMatthew Heon2020-05-14
| | | | | | | | | | | | | | | This is heavily based off the existing exec implementation, but does not presently share code with it, to try and ensure we don't break anything. Still to do: - Add code sharing with existing exec implementation - Wire in the frontend (exec HTTP endpoint) - Move all exec-related code in oci_conmon_linux.go into a new file - Investigate code sharing between HTTP attach and HTTP exec. Signed-off-by: Matthew Heon <mheon@redhat.com>
* WIP V2 attach bindings and testJhon Honce2020-05-13
| | | | | | | | * Add ErrLostSync to report lost of sync when de-mux'ing stream * Add logus.SetLevel(logrus.DebugLevel) when `go test -v` given * Add context to debugging messages Signed-off-by: Jhon Honce <jhonce@redhat.com>
* Fix errors found in coverity scanDaniel J Walsh2020-05-01
| | | | Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>
* podman v2 remove bloat v2Brent Baude2020-04-16
| | | | | | rid ourseleves of libpod references in v2 client Signed-off-by: Brent Baude <bbaude@redhat.com>
* Add support for selecting kvm and systemd labelsDaniel J Walsh2020-04-15
| | | | | | | | | | | | In order to better support kata containers and systemd containers container-selinux has added new types. Podman should execute the container with an SELinux process label to match the container type. Traditional Container process : container_t KVM Container Process: containre_kvm_t PID 1 Init process: container_init_t Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>
* Improve APIv2 support for AttachMatthew Heon2020-04-13
| | | | | | | | | | | | | | A few major fixes here: - Support for attaching to Configured containers, to match Docker behavior. - Support for stream parameter has been improved (we now properly handle cases where it is not set). - Initial support for logs parameter has been added. - Setting attach streams when the container has a terminal is now supported. - Errors are properly reported once the hijack has begun. Signed-off-by: Matthew Heon <mheon@redhat.com>
* refactor infoBrent Baude2020-04-06
| | | | | | the current implementation of info, while typed, is very loosely done so. we need stronger types for our apiv2 implmentation and bindings. Signed-off-by: Brent Baude <bbaude@redhat.com>
* Merge pull request #5707 from adrianreber/crun-checkpoint-1OpenShift Merge Robot2020-04-03
|\ | | | | Prepare for crun checkpoint support
| * checkpoint: handle XDG_RUNTIME_DIRAdrian Reber2020-04-03
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | For (almost) all commands which podman passes on to a OCI runtime XDG_RUNTIME_DIR is set to the same value. This does not happen for the checkpoint command. Using crun to checkpoint a container without this change will lead to crun using XDG_RUNTIME_DIR of the currently logged in user and so it will not find the container Podman wants to checkpoint. This bascially just copies a few lines from on of the other commands to handle 'checkpoint' as all the other commands. Thanks to Giuseppe for helping me with this. For 'restore' it is not needed as restore goes through conmon and for calling conmon Podman already configures XDG_RUNTIME_DIR correctly. Signed-off-by: Adrian Reber <areber@redhat.com>
| * checkpoint: change runtime checkpoint support testAdrian Reber2020-04-03
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Podman was checking if the runtime support checkpointing by running 'runtime checkpoint -h'. That works for runc. crun, however, does not use '-h, --help' for help output but, '-?, --help'. This commit switches both checkpoint support detection from 'runtime checkpoint -h' to 'runtime checkpoint --help'. Podman can now correctly detect if 'crun' also support checkpointing. Signed-off-by: Adrian Reber <areber@redhat.com>
* | Pass path environment down to the OCI runtimeDaniel J Walsh2020-04-03
|/ | | | Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>
* attach: fix hang if control path is deletedGiuseppe Scrivano2020-04-02
| | | | | | | | if the control path file is deleted, libpod hangs waiting for a reader to open it. Attempt to open it as non blocking until it returns an error different than EINTR or EAGAIN. Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>
* Add support for containers.confDaniel J Walsh2020-03-27
| | | | | | | vendor in c/common config pkg for containers.conf Signed-off-by: Qi Wang qiwan@redhat.com Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>
* Ensure that exec sends resize eventsMatthew Heon2020-03-25
| | | | | | | | | | | | | | | We previously tried to send resize events only after the exec session successfully started, which makes sense (we might drop an event or two that came in before the exec session started otherwise). However, the start function blocks, so waiting actually means we send no resize events at all, which is obviously worse than losing a few.. Sending resizes before attach starts seems to work fine in my testing, so let's do that until we get bug reports that it doesn't work. Fixes #5584 Signed-off-by: Matthew Heon <mheon@redhat.com>
* Add structure for new exec session tracking to DBMatthew Heon2020-03-18
| | | | | | | | | | | | | | | | | | | | | | | As part of the rework of exec sessions, we need to address them independently of containers. In the new API, we need to be able to fetch them by their ID, regardless of what container they are associated with. Unfortunately, our existing exec sessions are tied to individual containers; there's no way to tell what container a session belongs to and retrieve it without getting every exec session for every container. This adds a pointer to the container an exec session is associated with to the database. The sessions themselves are still stored in the container. Exec-related APIs have been restructured to work with the new database representation. The originally monolithic API has been split into a number of smaller calls to allow more fine-grained control of lifecycle. Support for legacy exec sessions has been retained, but in a deprecated fashion; we should remove this in a few releases. Signed-off-by: Matthew Heon <matthew.heon@pm.me>
* podman: avoid conmon zombie on execGiuseppe Scrivano2020-03-18
| | | | | | | conmon forks itself, so make sure we reap the first process and not leave a zombie process. Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>
* update systemd & dbus dependenciesValentin Rothberg2020-03-10
| | | | | | | | Update the outdated systemd and dbus dependencies which are now provided as go modules. This will further tighten our dependencies and releases and pave the way for the upcoming auto-update feature. Signed-off-by: Valentin Rothberg <rothberg@redhat.com>
* Revert "exec: get the exit code from sync pipe instead of file"Matthew Heon2020-03-09
| | | | | | | | | This reverts commit 4b72f9e4013411208751df2a92ab9f322d4da5b2. Continues what began with revert of d3d97a25e8c87cf741b2e24ac01ef84962137106 in previous commit. Signed-off-by: Matthew Heon <matthew.heon@pm.me>
* Revert "Exec: use ErrorConmonRead"Matthew Heon2020-03-09
| | | | | | | | | This reverts commit d3d97a25e8c87cf741b2e24ac01ef84962137106. This does not resolve the issues we expected it would, and has some unexpected side effects with the upcoming exec rework. Signed-off-by: Matthew Heon <matthew.heon@pm.me>
* Exec: use ErrorConmonReadPeter Hunt2020-03-03
| | | | | | | | Before, we were using -1 as a bogus value in podman to signify something went wrong when reading from a conmon pipe. However, conmon uses negative values to indicate the runtime failed, and return the runtime's exit code. instead, we should use a bogus value that is actually bogus. Define that value in the define package as MinInt32 (-1<< 31 - 1), which is outside of the range of possible pids (-1 << 31) Signed-off-by: Peter Hunt <pehunt@redhat.com>
* exec: get the exit code from sync pipe instead of filePeter Hunt2020-03-03
| | | | | | | | Before, we were getting the exit code from the file, in which we waited an arbitrary amount of time (5 seconds) for the file, and segfaulted if we didn't find it. instead, we should be a bit more certain conmon has sent the exit code. Luckily, it sends the exit code along the sync pipe fd, so we can read it from there Adapt the ExecContainer interface to pass along a channel to get the pid and exit code from conmon, to be able to read both from the pipe Signed-off-by: Peter Hunt <pehunt@redhat.com>
* Ensure that exec sessions inherit supplemental groupsMatthew Heon2020-02-28
| | | | | | | | This corrects a regression from Podman 1.4.x where container exec sessions inherited supplemental groups from the container, iff the exec session did not specify a user. Signed-off-by: Matthew Heon <matthew.heon@pm.me>
* rootless: fix a regression when using -dGiuseppe Scrivano2020-02-18
| | | | | | | | | | | | when using -d and port mapping, make sure the correct fd is injected into conmon. Move the pipe creation earlier as the fd must be known at the time we create the container through conmon. Closes: https://github.com/containers/libpod/issues/5167 Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>
* Merge pull request #4861 from giuseppe/add-cgroups-disabled-conmonOpenShift Merge Robot2020-01-22
|\ | | | | oci_conmon: do not create a cgroup under systemd
| * oci_conmon: do not create a cgroup under systemdGiuseppe Scrivano2020-01-16
| | | | | | | | | | | | | | | | Detect whether we are running under systemd (if the INVOCATION_ID is set). If Podman is running under a systemd service, we do not need to create a cgroup for conmon. Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>
| * podman: add new option --cgroups=no-conmonGiuseppe Scrivano2020-01-16
| | | | | | | | | | | | | | | | it allows to disable cgroups creation only for the conmon process. A new cgroup is created for the container payload. Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>
* | Add an API for Attach over HTTP APIMatthew Heon2020-01-16
|/ | | | | | | | | | | | | | | | | | | | | | | | | | The new APIv2 branch provides an HTTP-based remote API to Podman. The requirements of this are, unfortunately, incompatible with the existing Attach API. For non-terminal attach, we need append a header to what was copied from the container, to multiplex STDOUT and STDERR; to do this with the old API, we'd need to copy into an intermediate buffer first, to handle the headers. To avoid this, provide a new API to handle all aspects of terminal and non-terminal attach, including closing the hijacked HTTP connection. This might be a bit too specific, but for now, it seems to be the simplest approach. At the same time, add a Resize endpoint. This needs to be a separate endpoint, so our existing channel approach does not work here. I wanted to rework the rest of attach at the same time (some parts of it, particularly how we start the Attach session and how we do resizing, are (in my opinion) handled much better here. That may still be on the table, but I wanted to avoid breaking existing APIs in this already massive change. Signed-off-by: Matthew Heon <matthew.heon@pm.me>
* oci_conmon: not make accessible dirs if not neededGiuseppe Scrivano2020-01-14
| | | | | | | | | | | | | | | do not change the permissions mask for the rundir and the tmpdir when running a container with a user namespace and the current user is mapped inside the user namespace. The change was introduced with 849548ffb8e958e901317eceffdcc2d918cafd8d, that dropped the intermediate mount namespace in favor of allowing root into the user namespace to access these directories. Closes: https://github.com/containers/libpod/issues/4846 Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>
* make lint: enable gocriticValentin Rothberg2020-01-13
| | | | | | | `gocritic` is a powerful linter that helps in preventing certain kinds of errors as well as enforcing a coding style. Signed-off-by: Valentin Rothberg <rothberg@redhat.com>
* Merge pull request #4805 from giuseppe/log-tagOpenShift Merge Robot2020-01-10
|\ | | | | log: support --log-opt tag=
| * log: support --log-opt tag=Giuseppe Scrivano2020-01-10
| | | | | | | | | | | | | | | | | | | | support a custom tag to add to each log for the container. It is currently supported only by the journald backend. Closes: https://github.com/containers/libpod/issues/3653 Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>
* | Merge pull request #4818 from haircommander/piped-exec-fixOpenShift Merge Robot2020-01-09
|\ \ | |/ |/| exec: fix pipes
| * exec: fix pipesPeter Hunt2020-01-08
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In a largely anticlimatic solution to the saga of piped input from conmon, we come to this solution. When we pass the Stdin stream to the exec.Command structure, it's immediately consumed and lost, instead of being consumed through CopyDetachable(). When we don't pass -i in, conmon is not told to create a masterfd_stdin, and won't pass anything to the container. With both, we can do echo hi | podman exec -til cat and get the expected hi Signed-off-by: Peter Hunt <pehunt@redhat.com>
* | fix lint: correct func identifier in commentValentin Rothberg2020-01-08
| | | | | | | | Signed-off-by: Valentin Rothberg <rothberg@redhat.com>
* | rootless: use RootlessKit port forwarderAkihiro Suda2020-01-08
|/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | RootlessKit port forwarder has a lot of advantages over the slirp4netns port forwarder: * Very high throughput. Benchmark result on Travis: socat: 5.2 Gbps, slirp4netns: 8.3 Gbps, RootlessKit: 27.3 Gbps (https://travis-ci.org/rootless-containers/rootlesskit/builds/597056377) * Connections from the host are treated as 127.0.0.1 rather than 10.0.2.2 in the namespace. No UDP issue (#4586) * No tcp_rmem issue (#4537) * Probably works with IPv6. Even if not, it is trivial to support IPv6. (#4311) * Easily extensible for future support of SCTP * Easily extensible for future support of `lxc-user-nic` SUID network RootlessKit port forwarder has been already adopted as the default port forwarder by Rootless Docker/Moby, and no issue has been reported AFAIK. As the port forwarder is imported as a Go package, no `rootlesskit` binary is required for Podman. Fix #4586 May-fix #4559 Fix #4537 May-fix #4311 See https://github.com/rootless-containers/rootlesskit/blob/v0.7.0/pkg/port/builtin/builtin.go Signed-off-by: Akihiro Suda <akihiro.suda.cz@hco.ntt.co.jp>
* Reap exec sessions on cleanup and removalMatthew Heon2019-12-12
| | | | | | | | | | | | | | | | | | | | | | We currently rely on exec sessions being removed from the state by the Exec() API itself, on detecting the session stopping. This is not a reliable method, though. The Podman frontend for exec could be killed before the session ended, or another Podman process could be holding the lock and prevent update (most notable in `run --rm`, when a container with an active exec session is stopped). To resolve this, add a function to reap active exec sessions from the state, and use it on cleanup (to clear sessions after the container stops) and remove (to do the same when --rm is passed). This is a bit more complicated than it ought to be because Kata and company exist, and we can't guarantee the exec session has a PID on the host, so we have to plumb this through to the OCI runtime. Fixes #4666 Signed-off-by: Matthew Heon <matthew.heon@pm.me>
* Merge pull request #4352 from vrothberg/config-packageOpenShift Merge Robot2019-10-31
|\ | | | | refactor libpod config into libpod/config
| * add libpod/configValentin Rothberg2019-10-31
| | | | | | | | | | | | | | | | | | | | | | | | Refactor the `RuntimeConfig` along with related code from libpod into libpod/config. Note that this is a first step of consolidating code into more coherent packages to make the code more maintainable and less prone to regressions on the long runs. Some libpod definitions were moved to `libpod/define` to resolve circular dependencies. Signed-off-by: Valentin Rothberg <rothberg@redhat.com>
* | Merge pull request #4380 from giuseppe/rootless-create-cgroup-for-conmonOpenShift Merge Robot2019-10-30
|\ \ | | | | | | libpod, rootless: create cgroup for conmon
| * | libpod, rootless: create cgroup for conmonGiuseppe Scrivano2019-10-30
| |/ | | | | | | | | | | | | | | always create a new cgroup for conmon also when running as rootless. We were previously creating one only when necessary, but that behaves differently than root containers. Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>
* / Processes execed into container should match container labelDaniel J Walsh2019-10-29
|/ | | | | | Processes execed into a container were not being run with the correct label. Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>
* exec: remove unused varPeter Hunt2019-10-21
| | | | Signed-off-by: Peter Hunt <pehunt@redhat.com>
* Add a MissingRuntime implementationMatthew Heon2019-10-15
| | | | | | | | | | | | | | | | | When a container is created with a given OCI runtime, but then it is uninstalled or removed from the configuration file, Libpod presently reacts very poorly. The EvictContainer code can potentially remove these containers, but we still can't see them in `podman ps` (aside from the massive logrus.Errorf messages they create). Providing a minimal OCI runtime implementation for missing runtimes allows us to behave better. We'll be able to retrieve containers from the database, though we still pop up an error for each missing runtime. For containers which are stopped, we can remove them as normal. Signed-off-by: Matthew Heon <matthew.heon@pm.me>
* change error wording when conmon fails without logsValentin Rothberg2019-10-14
| | | | | | | | | | | | | | In some cases, conmon can fail without writing logs. Change the wording of the error message from "error reading container (probably exited) json message" to "container create failed (no logs from conmon)" to have a more helpful error message that is more consistent with other errors at that stage of execution. Signed-off-by: Valentin Rothberg <rothberg@redhat.com>
* Move OCI runtime implementation behind an interfaceMatthew Heon2019-10-10
For future work, we need multiple implementations of the OCI runtime, not just a Conmon-wrapped runtime matching the runc CLI. As part of this, do some refactoring on the interface for exec (move to a struct, not a massive list of arguments). Also, add 'all' support to Kill and Stop (supported by runc and used a bit internally for removing containers). Signed-off-by: Matthew Heon <matthew.heon@pm.me>
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