When multiple connections are monitoring events via the remote API, the inotify in the hpcloud library seems unable to consistently send events. Switching from inotify to poll seems to clear this up.
Fixes: #6664
Signed-off-by: Brent Baude <bbaude@redhat.com>
Add support to auto-update containers running in systemd units as
generated with `podman generate systemd --new`.
`podman auto-update` looks up containers with a specified
"io.containers.autoupdate" label (i.e., the auto-update policy).
If the label is present and set to "image", Podman reaches out to the
corresponding registry to check if the image has been updated. We
consider an image to be updated if the digest in the local storage is
different than the one of the remote image. If an image must be
updated, Podman pulls it down and restarts the container. Note that the
restarting sequence relies on systemd.
At container-creation time, Podman looks up the "PODMAN_SYSTEMD_UNIT"
environment variables and stores it verbatim in the container's label.
This variable is now set by all systemd units generated by
`podman-generate-systemd` and is set to `%n` (i.e., the name of systemd
unit starting the container). This data is then being used in the
auto-update sequence to instruct systemd (via DBUS) to restart the unit
and hence to restart the container.
Note that this implementation of auto-updates relies on systemd and
requires a fully-qualified image reference to be used to create the
container. This enforcement is necessary to know which image to
actually check and pull. If we used an image ID, we would not know
which image to check/pull anymore.
Fixes: #3575
Signed-off-by: Valentin Rothberg <rothberg@redhat.com>
Update the outdated systemd and dbus dependencies which are now provided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>
`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>
in the case where the host has a large journald, iterating the journal
without using a Match is very poor performance. this might be a
temporary fix while we figure out why the systemd library does not seem to
behave properly.
Signed-off-by: baude <bbaude@redhat.com>
JSON optimizes it out in that case anyways, so don't waste cycles
doing an Itoa (and Atoi on the decode side).
Signed-off-by: Matthew Heon <matthew.heon@pm.me>
We weren't actually storing this, so we'd lose the exit code for
containers run with --rm or force-removed while running if the
journald backend for events was in use.
Fixes#3795
Signed-off-by: Matthew Heon <matthew.heon@pm.me>
it looks like the core-os systemd library has some issue when using
seektail and add match. this patch works around that shortcoming for
the time being.
Fixes: #3616
Signed-off-by: baude <bbaude@redhat.com>
We need this specifically for tests, but others may find it
useful if they don't explicitly need events and don't want the
performance implications of using them.
Signed-off-by: Matthew Heon <matthew.heon@pm.me>
an internal change in libpod will soon required the ability to lookup
the last container event using the continer name or id and the type of
event. this pr is in preperation for that need.
Signed-off-by: baude <bbaude@redhat.com>
once the default event logger was removed from libpod.conf, we need to
set the default based on whether the systemd build tag is used or not.
Signed-off-by: baude <bbaude@redhat.com>
If the systemd development files are not present on the system which
builds podman, then `podman events` will error on runtime creation.
Beside this, a warning will be printed when compiling podman.
This commit mainly exists because projects which depend on libpod
would not need the podman event support and therefore do not need to
rely on the systemd headers.
Signed-off-by: Sascha Grunert <sgrunert@suse.com>
add the ability for podman to read and write events to journald instead
of just a logfile. This can be controlled in libpod.conf with the
`events_logger` attribute of `journald` or `file`. The default will be
set to `journald`.
Signed-off-by: baude <bbaude@redhat.com>
We have a new event for container 'Exited' which has been renamed to
'died'.
also removed the stream bool from the varlink endpoint for events
because it can be determined by the varlink more value.
Signed-off-by: baude <bbaude@redhat.com>
In lipod, we now log major events that occurr. These events
can be displayed using the `podman events` command. Each
event contains:
* Type (container, image, volume, pod...)
* Status (create, rm, stop, kill, ....)
* Timestamp in RFC3339Nano format
* Name (if applicable)
* Image (if applicable)
The format of the event and the varlink endpoint are to not
be considered stable until cockpit has done its enablement.
Signed-off-by: baude <bbaude@redhat.com>
