| Commit message (Collapse) | Author | Age |
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Add tcp-established to checkpoint/restore
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CRIU can checkpoint and restore processes/containers with established
TCP connections if the correct option is specified. To implement
checkpoint and restore with support for established TCP connections with
Podman this commit adds the necessary options to runc during checkpoint
and also tells conmon during restore to use 'runc restore' with
'--tcp-established'.
For this Podman feature to work a corresponding conmon change is
required.
Example:
$ podman run --tmpfs /tmp --name podman-criu-test -d docker://docker.io/yovfiatbeb/podman-criu-test
$ nc `podman inspect -l | jq -r '.[0].NetworkSettings.IPAddress'` 8080
GET /examples/servlets/servlet/HelloWorldExample
Connection: keep-alive
1
GET /examples/servlets/servlet/HelloWorldExample
Connection: keep-alive
2
$ # Using HTTP keep-alive multiple requests are send to the server in the container
$ # Different terminal:
$ podman container checkpoint -l
criu failed: type NOTIFY errno 0
$ # Looking at the log file would show errors because of established TCP connections
$ podman container checkpoint -l --tcp-established
$ # This works now and after the restore the same connection as above can be used for requests
$ podman container restore -l --tcp-established
The restore would fail without '--tcp-established' as the checkpoint image
contains established TCP connections.
Signed-off-by: Adrian Reber <areber@redhat.com>
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This is basically the same change as
ff47a4c2d5485fc49f937f3ce0c4e2fd6bdb1956 (Use a struct to pass options to Checkpoint())
just for the Restore() function. It is used to pass multiple restore
options to the API and down to conmon which is used to restore
containers. This is for the upcoming changes to support checkpointing
and restoring containers with '--tcp-established'.
Signed-off-by: Adrian Reber <areber@redhat.com>
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rootless: add new netmode "slirp4netns"
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Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>
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exec: remove polling for PID file
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prefer a fsnotify watcher to polling the file, we take advantage of
inotify on Linux and react more promptly to the PID file being
created.
If the watcher cannot be created, then fallback to the old polling
mechanism.
Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>
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don't wait for the timeout to expire if the runtime process exited.
I've noticed podman to hang on exit and keeping the container lock
taken when the OCI runtime already exited.
Additionally, it reduces the waiting time as we won't hit the 25
milliseconds waiting time in the worst case.
Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>
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The conmon exit command is running inside of a namespace where the
process is running with uid=0. When it launches again podman for the
cleanup, podman is not running in rootless mode as the uid=0.
Export some more env variables to tell podman we are in rootless
mode.
Closes: https://github.com/containers/libpod/issues/1859
Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>
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exec: always make explicit the tty value
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otherwise runc will take by default the value used for creating the
container. Setting it explicit overrides its default value and we
won't end up trying to use a terminal when not available.
Closes: https://bugzilla.redhat.com/show_bug.cgi?id=1625876
Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>
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set root propagation based on volume properties
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Set the root propagation based on the properties of volumes and default
mounts. To remain compatibility, follow the semantics of Docker. If a
volume is shared, keep the root propagation shared which works for slave
and private volumes too. For slave volumes, it can either be shared or
rshared. Do not change the root propagation for private volumes and
stick with the default.
Fixes: #1834
Signed-off-by: Valentin Rothberg <vrothberg@suse.com>
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libpod should know if the network is disabled
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/etc/resolv.conf and /etc/hosts should not be created and mounted when the
network is disabled.
We should not be calling the network setup and cleanup functions when it is
disabled either.
In doing this patch, I found that all of the bind mounts were particular to
Linux along with the generate functions, so I moved them to
container_internal_linux.go
Since we are checking if we are using a network namespace, we need to check
after the network namespaces has been created in the spec.
Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>
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Add history field to image inspect
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Signed-off-by: Qi Wang <qiwan@redhat.com>
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Add an exists subcommand to podman container and podman image that allows
users to verify the existence of a container or image by ID or name. The return
code can be 0 (success), 1 (failed to find), or 125 (failed to work with runtime).
Issue #1845
Signed-off-by: baude <bbaude@redhat.com>
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Added option to keep container running after checkpointing
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CRIU supports to leave processes running after checkpointing:
-R|--leave-running leave tasks in running state after checkpoint
runc also support to leave containers running after checkpointing:
--leave-running leave the process running after checkpointing
With this commit the support to leave a container running after
checkpointing is brought to Podman:
--leave-running, -R leave the container running after writing checkpoint to disk
Now it is possible to checkpoint a container at some point in time
without stopping the container. This can be used to rollback the
container to an early state:
$ podman run --tmpfs /tmp --name podman-criu-test -d docker://docker.io/yovfiatbeb/podman-criu-test
$ curl 10.88.64.253:8080/examples/servlets/servlet/HelloWorldExample
3
$ podman container checkpoint -R -l
$ curl 10.88.64.253:8080/examples/servlets/servlet/HelloWorldExample
4
$ curl 10.88.64.253:8080/examples/servlets/servlet/HelloWorldExample
5
$ podman stop -l
$ podman container restore -l
$ curl 10.88.64.253:8080/examples/servlets/servlet/HelloWorldExample
4
So after checkpointing the container kept running and was stopped after
some time. Restoring this container will restore the state right at the
checkpoint.
Signed-off-by: Adrian Reber <areber@redhat.com>
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For upcoming changes to the Checkpoint() functions this commit switches
checkpoint options from a boolean to a struct, so that additional
options can be passed easily to Checkpoint() without changing the
function parameters all the time.
Signed-off-by: Adrian Reber <areber@redhat.com>
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generate kubernetes YAML from a libpod container
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scope out new kube subcommand where we can add generate. you can now generate kubernetes
YAML that will allow you to run the container in a kubernetes environment. When
The YAML description will always "wrap" a container in a simple v1.Pod description.
Tests and further documentation will be added in additional PRs.
This function should be considered very much "under heavy development" at
this point.
Signed-off-by: baude <bbaude@redhat.com>
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Allow users to expose ports from the pod to the host
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we need to allow users to expose ports to the host for the purposes
of networking, like a webserver. the port exposure must be done at
the time the pod is created.
strictly speaking, the port exposure occurs on the infra container.
Signed-off-by: baude <bbaude@redhat.com>
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Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>
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Update metalinter dependency
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Addressing goconst warning: 3 other occurrence(s) of "Unknown" found
Signed-off-by: Šimon Lukašík <slukasik@redhat.com>
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Addressing:
ineffectual assignment to err (ineffassign)
Signed-off-by: Šimon Lukašík <slukasik@redhat.com>
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Redefining err by := operator within block makes this err variable block local.
Addressing lint:
libpod/oci.go:368:3:warning: ineffectual assignment to err (ineffassign)
Signed-off-by: Šimon Lukašík <slukasik@redhat.com>
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At scale, it appears that we sometimes hit the 1000ms timeout to create
the PID file when a container is created or executed.
Increasing the value to 60s should help when running a lot of containers
in heavy-loaded environment.
Related #1495
Fixes #1816
Signed-off-by: Emilien Macchi <emilien@redhat.com>
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rm -f now removes a paused container
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We now can remove a paused container by sending it a kill signal while it
is paused. We then unpause the container and it is immediately killed.
Also, reworked how the parallelWorker results are handled to provide a
more consistent approach to how each subcommand implements it. It also
fixes a bug where if one container errors, the error message is duplicated
when printed out.
Signed-off-by: baude <bbaude@redhat.com>
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Accurately update state if prepare() partially fails
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We are seeing some issues where, when part of prepare() fails
(originally noticed due to a bad static IP), the other half does
not successfully clean up, and the state can be left in a bad
place (not knowing about an active SHM mount for example).
Signed-off-by: Matthew Heon <mheon@redhat.com>
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Add a rootless field to the info data (e.g., `podman info`) to indicate
if the executing user is root or not. In most cases, this can be
guessed but now it is clear and may aid in debugging, reporting and
understanding certain issues.
Signed-off-by: Valentin Rothberg <vrothberg@suse.com>
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correct assignment of networkStatus
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once we changed configureNetNS to return a result beyond an error,
we need to make sure that we used locals instead of ctr attributes
when determining networks.
Resolves #1752
Signed-off-by: baude <bbaude@redhat.com>
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Do not hide errors when creating container with UserNSRoot
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This one is tricky. By using `:=` operator we have made err variable to be local
in the gorutine and different from `err` variable in the surrounding function.
And thus `createContainer` function returned always nil, even in cases when
some error occurred in the gorutine.
Signed-off-by: Šimon Lukašík <slukasik@redhat.com>
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Don't fail if /etc/passwd or /etc/group does not exists
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Container images can be created without passwd or group file, currently
if one of these containers gets run with a --user flag the container blows
up complaining about t a missing /etc/passwd file.
We just need to check if the error on read is ENOEXIST then allow the
read to return, not fail.
Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>
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move defer'd function declaration ahead of prepare error return
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Signed-off-by: baude <bbaude@redhat.com>
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Do not call out to runc for sync
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When we read the conmon error status file, if Atoi fails to parse
the string we read from the file as an int, print the string as
part of the error message so we know what might have gone wrong.
Signed-off-by: Matthew Heon <mheon@redhat.com>
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Signed-off-by: Matthew Heon <matthew.heon@gmail.com>
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Signed-off-by: Matthew Heon <matthew.heon@gmail.com>
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Instead of running a full sync after starting a container to pick
up its PID, grab it from Conmon instead.
Signed-off-by: Matthew Heon <matthew.heon@gmail.com>
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When we scan a container in runc and see that it no longer
exists, we already set ContainerStatusExited to indicate that it
no longer exists in runc. Now, also set an exit code and exit
time, so PS output will make some sense.
Signed-off-by: Matthew Heon <matthew.heon@gmail.com>
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