5:55 p.m.
Hello Everyone,
I'm testing out using journald for logging from one of my containers. I
think I configured it correctly, but I don't see anything in the path I
passed to it.
Here's the create command I used:
CreateCommand": [
"podman",
"run",
"-d",
"--name",
"postgrey",
"--pod",
"mailman",
"--volume",
"postgrey:/var/spool/postfix/postgrey:Z",
"--log-driver",
"journald",
"--log-opt",
"path=/var/log/containers/postgrey.log",
"postgrey"
],
/var/log/containers is empty:
# ls -l /var/log/containers/
total 0
Docker's docs on retrieving the logs with journalctl don't show me
anything:
journalctl CONTAINER_NAME=postgrey
-- Logs begin at Wed 2022-01-19 17:04:20 EST, end at Tue 2022-01-25
18:40:27 EST. --
-- No entries --
Incidentally, I used podman to crate the systemd unit files for the pod
and dumped them into /etc/systemd/system. I'm starting, stopping, etc
the pod using systemctl.
Using journald for logging means the container's logs get written to
the host's journal, right? If that's true, what am I doing wrong?
--
Ranbir
10:46 p.m.
I played with the log drivers (I’m on a very old Podman … 1.6.2). What a found was
journald didn’t use the file path at all. I used a less specific retrieval (along the
lines of just journalctl). It wasn’t satisfactory to me. Instead, I chose the k8s driver.
Despite the implications that this is somehow JSON-formatted output, it wasn’t. It wrote
my output to the file I requested as plain text.
--
Jim Melton
On Jan 25, 2022, at 4:55 PM, Ranbir
<m3freak(a)thesandhufamily.ca> wrote:
Hello Everyone,
I'm testing out using journald for logging from one of my containers. I
think I configured it correctly, but I don't see anything in the path I
passed to it.
Here's the create command I used:
CreateCommand": [
"podman",
"run",
"-d",
"--name",
"postgrey",
"--pod",
"mailman",
"--volume",
"postgrey:/var/spool/postfix/postgrey:Z",
"--log-driver",
"journald",
"--log-opt",
"path=/var/log/containers/postgrey.log",
"postgrey"
],
/var/log/containers is empty:
# ls -l /var/log/containers/
total 0
Docker's docs on retrieving the logs with journalctl don't show me
anything:
journalctl CONTAINER_NAME=postgrey
-- Logs begin at Wed 2022-01-19 17:04:20 EST, end at Tue 2022-01-25
18:40:27 EST. --
-- No entries --
Incidentally, I used podman to crate the systemd unit files for the pod
and dumped them into /etc/systemd/system. I'm starting, stopping, etc
the pod using systemctl.
Using journald for logging means the container's logs get written to
the host's journal, right? If that's true, what am I doing wrong?
--
Ranbir
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8:09 p.m.
On Tue, 2022-01-25 at 21:46 -0700, Jim Melton wrote:
I played with the log drivers (I’m on a very old Podman … 1.6.2).
What a found was journald didn’t use the file path at all. I used a
less specific retrieval (along the lines of just journalctl). It
wasn’t satisfactory to me. Instead, I chose the k8s driver. Despite
the implications that this is somehow JSON-formatted output, it
wasn’t. It wrote my output to the file I requested as plain text.
I tried setting log-driver to "k8s-file" and a file was created in the
location I set it to, but the file is empty. It's been about 3 hours
since I did it and it's still empty. :/
--
Ranbir
7:08 a.m.
On 1/26/22 21:09, Ranbir wrote:
On Tue, 2022-01-25 at 21:46 -0700, Jim Melton wrote:
> I played with the log drivers (I’m on a very old Podman … 1.6.2).
> What a found was journald didn’t use the file path at all. I used a
> less specific retrieval (along the lines of just journalctl). It
> wasn’t satisfactory to me. Instead, I chose the k8s driver. Despite
> the implications that this is somehow JSON-formatted output, it
> wasn’t. It wrote my output to the file I requested as plain text.
I tried setting log-driver to "k8s-file" and a file was created in the
location I set it to, but the file is empty. It's been about 3 hours
since I did it and it's still empty. :/
I think you are hitting very old bugs which will require you to update
the podman package.
10:45 a.m.
On Thu, 2022-01-27 at 08:08 -0500, Daniel Walsh wrote:
I think you are hitting very old bugs which will require you to
update
the podman package.
I'm running podman 3.3.1 on a Rocky Linux 8.5 host. I wanted to stay
with the version included in the distribution. Should I move to the
latest release from upstream (i.e. the podman project)?
I suppose my other alternative is to just live with current logging
situation.
--
Ranbir
12:38 p.m.
On 1/27/22 11:45, Ranbir wrote:
On Thu, 2022-01-27 at 08:08 -0500, Daniel Walsh wrote:
> I think you are hitting very old bugs which will require you to
> update
> the podman package.
I'm running podman 3.3.1 on a Rocky Linux 8.5 host. I wanted to stay
with the version included in the distribution. Should I move to the
latest release from upstream (i.e. the podman project)?
I suppose my other alternative is to just live with current logging
situation.
No that should be new enough, I was going by a comment earlier on Podman
1.6.
It could be a bug in that version, but it would be nice if you could try
on the latest version.
podman 3.4 should be showing up in RHEL8.5 in the next week or two,
don't know how quickly it will show up in Rocky.
11:48 a.m.
On Thu, 2022-01-27 at 13:38 -0500, Daniel Walsh wrote:
It could be a bug in that version, but it would be nice if you could
try
on the latest version.
I haven't been able to try on the latest upstream release.
podman 3.4 should be showing up in RHEL8.5 in the next week or two,
don't know how quickly it will show up in Rocky.
I did try the latest version available on CentOS Stream: 3.4.1-dev. I
tried setting journald as the log driver and gave the log path, but no
file was created.
When set to k8s-file, the file _does_ get created and written to. In
addition, the log file looks exactly (minus the journald time stamps)
like it does when flexget writes its own log.
On a hunch, I checked the journal for a different container that's
running sabnzbd and noticed its logs were in there. Yet, I hadn't
specified anything for it. Is journald the default log driver? Anyway,
the log looked the same, although the text colour was all red, which
I've seen in the journal before for errors. Can this be changed?
I switched the flexget container back to not specifying a log driver
which sent its logs to the journal. But, this time the logs looked
nothing like the k8s-file log file that was being written to before.
It's actually missing information. See below for the comparisons.
Here's a raw log file written by flexget itself:
2022-02-01 12:34:03 INFO task tv_shows Rerunning the task in case
better resolution can be achieved.
2022-02-01 12:34:03 INFO task premieres Plugin next_series_episodes has
requested task to be ran again after execution has completed. Reason: Look for next
season
2022-02-01 12:34:04 INFO task premieres Rerunning the task in case
better resolution can be achieved.
Here's the contents of the k8s-file (not much activity before I changed it):
2022-01-31T23:35:54.992078575-05:00 stdout F 2022-01-31 23:35:54 INFO scheduler
Starting scheduler
2022-01-31T23:39:35.081444166-05:00 stdout F 2022-01-31 23:39:35 INFO manager
Got SIGTERM. Shutting down.
Here's the journal for the same container:
$ sudo journalctl CONTAINER_NAME=flexget -n 5
-- Logs begin at Fri 2022-01-28 12:23:01 EST, end at Tue 2022-02-01
12:46:37 EST. --
Feb 01 12:34:02 containment01 conmon[31764]: [172B blob data]
Feb 01 12:34:03 containment01 conmon[31764]: [122B blob data]
Feb 01 12:34:03 containment01 conmon[31764]: [172B blob data]
Feb 01 12:34:03 containment01 conmon[31764]: [183B blob data]
Feb 01 12:34:04 containment01 conmon[31764]: [122B blob data]
Where'd the rest of the information go?
--
Ranbir
2:18 p.m.
On 2/1/22 12:48, Ranbir wrote:
On Thu, 2022-01-27 at 13:38 -0500, Daniel Walsh wrote:
> It could be a bug in that version, but it would be nice if you could
> try
> on the latest version.
I haven't been able to try on the latest upstream release.
> podman 3.4 should be showing up in RHEL8.5 in the next week or two,
> don't know how quickly it will show up in Rocky.
I did try the latest version available on CentOS Stream: 3.4.1-dev. I
tried setting journald as the log driver and gave the log path, but no
file was created.
When set to k8s-file, the file _does_ get created and written to. In
addition, the log file looks exactly (minus the journald time stamps)
like it does when flexget writes its own log.
On a hunch, I checked the journal for a different container that's
running sabnzbd and noticed its logs were in there. Yet, I hadn't
specified anything for it. Is journald the default log driver?
It is going forward
but not for RHEL8, because of issues on systemd and
journal not being available to rootless users.
Anyway,
the log looked the same, although the text colour was all red, which
I've seen in the journal before for errors. Can this be changed?
I switched the flexget container back to not specifying a log driver
which sent its logs to the journal. But, this time the logs looked
nothing like the k8s-file log file that was being written to before.
It's actually missing information. See below for the comparisons.
Here's a raw log file written by flexget itself:
2022-02-01 12:34:03 INFO task tv_shows Rerunning the task in case
better resolution can be achieved.
2022-02-01 12:34:03 INFO task premieres Plugin next_series_episodes
has requested task to be ran again after execution has completed. Reason: Look for next
season
2022-02-01 12:34:04 INFO task premieres Rerunning the task in case
better resolution can be achieved.
Here's the contents of the k8s-file (not much activity before I changed it):
2022-01-31T23:35:54.992078575-05:00 stdout F 2022-01-31 23:35:54 INFO scheduler
Starting scheduler
2022-01-31T23:39:35.081444166-05:00 stdout F 2022-01-31 23:39:35 INFO manager
Got SIGTERM. Shutting down.
Here's the journal for the same container:
$ sudo journalctl CONTAINER_NAME=flexget -n 5
-- Logs begin at Fri 2022-01-28 12:23:01 EST, end at Tue 2022-02-01
12:46:37 EST. --
Feb 01 12:34:02 containment01 conmon[31764]: [172B blob data]
Feb 01 12:34:03 containment01 conmon[31764]: [122B blob data]
Feb 01 12:34:03 containment01 conmon[31764]: [172B blob data]
Feb 01 12:34:03 containment01 conmon[31764]: [183B blob data]
Feb 01 12:34:04 containment01 conmon[31764]: [122B blob data]
Where'd the rest of the information go?
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7 comments
3 participants
participants (3)
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Ranbir