From 38863e76423e3f56e4eb12b86d7fe2a31b2fb502 Mon Sep 17 00:00:00 2001 From: Brent Baude Date: Tue, 6 Jul 2021 13:48:03 -0500 Subject: Replace old RESTful tutorial with updated README Remove outdated information on go bindings. Moved the tips for debugging into the REAME and tidied up relevant links. Fixes: #9334 [CI_DOCS] [NO TESTS NEEDED] Signed-off-by: Brent Baude --- pkg/bindings/README.md | 77 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 77 insertions(+) (limited to 'pkg/bindings/README.md') diff --git a/pkg/bindings/README.md b/pkg/bindings/README.md index 6fd7d7831..f41304e0f 100644 --- a/pkg/bindings/README.md +++ b/pkg/bindings/README.md @@ -154,3 +154,80 @@ func main() { fmt.Println("Container started.") } ``` + +## Debugging tips + +To debug in a development setup, you can start the Podman system service +in debug mode like: + +```bash +$ podman --log-level=debug system service -t 0 +``` + +The `--log-level=debug` echoes all the logged requests and is useful to +trace the execution path at a finer granularity. A snippet of a sample run looks like: + +```bash +INFO[0000] podman filtering at log level debug +DEBU[0000] Called service.PersistentPreRunE(podman --log-level=debug system service -t0) +DEBU[0000] Ignoring libpod.conf EventsLogger setting "/home/lsm5/.config/containers/containers.conf". Use "journald" if you want to change this setting and remove libpod.conf files. +DEBU[0000] Reading configuration file "/usr/share/containers/containers.conf" +DEBU[0000] Merged system config "/usr/share/containers/containers.conf": {Editors note: the remainder of this line was removed due to Jekyll formatting errors.} +DEBU[0000] Using conmon: "/usr/bin/conmon" +DEBU[0000] Initializing boltdb state at /home/lsm5/.local/share/containers/storage/libpod/bolt_state.db +DEBU[0000] Overriding run root "/run/user/1000/containers" with "/run/user/1000" from database +DEBU[0000] Using graph driver overlay +DEBU[0000] Using graph root /home/lsm5/.local/share/containers/storage +DEBU[0000] Using run root /run/user/1000 +DEBU[0000] Using static dir /home/lsm5/.local/share/containers/storage/libpod +DEBU[0000] Using tmp dir /run/user/1000/libpod/tmp +DEBU[0000] Using volume path /home/lsm5/.local/share/containers/storage/volumes +DEBU[0000] Set libpod namespace to "" +DEBU[0000] Not configuring container store +DEBU[0000] Initializing event backend file +DEBU[0000] using runtime "/usr/bin/runc" +DEBU[0000] using runtime "/usr/bin/crun" +WARN[0000] Error initializing configured OCI runtime kata: no valid executable found for OCI runtime kata: invalid argument +DEBU[0000] using runtime "/usr/bin/crun" +INFO[0000] Setting parallel job count to 25 +INFO[0000] podman filtering at log level debug +DEBU[0000] Called service.PersistentPreRunE(podman --log-level=debug system service -t0) +DEBU[0000] Ignoring libpod.conf EventsLogger setting "/home/lsm5/.config/containers/containers.conf". Use "journald" if you want to change this setting and remove libpod.conf files. +DEBU[0000] Reading configuration file "/usr/share/containers/containers.conf" +``` + +If the Podman system service has been started via systemd socket activation, +you can view the logs using journalctl. The logs after a sample run look like: + +```bash +$ journalctl --user --no-pager -u podman.socket +-- Reboot -- +Jul 22 13:50:40 nagato.nanadai.me systemd[1048]: Listening on Podman API Socket. +$ +``` + +```bash +$ journalctl --user --no-pager -u podman.service +Jul 22 13:50:53 nagato.nanadai.me systemd[1048]: Starting Podman API Service... +Jul 22 13:50:54 nagato.nanadai.me podman[1527]: time="2020-07-22T13:50:54-04:00" level=error msg="Error refreshing volume 38480630a8bdaa3e1a0ebd34c94038591b0d7ad994b37be5b4f2072bb6ef0879: error acquiring lock 0 for volume 38480630a8bdaa3e1a0ebd34c94038591b0d7ad994b37be5b4f2072bb6ef0879: file exists" +Jul 22 13:50:54 nagato.nanadai.me podman[1527]: time="2020-07-22T13:50:54-04:00" level=error msg="Error refreshing volume 47d410af4d762a0cc456a89e58f759937146fa3be32b5e95a698a1d4069f4024: error acquiring lock 0 for volume 47d410af4d762a0cc456a89e58f759937146fa3be32b5e95a698a1d4069f4024: file exists" +Jul 22 13:50:54 nagato.nanadai.me podman[1527]: time="2020-07-22T13:50:54-04:00" level=error msg="Error refreshing volume 86e73f082e344dad38c8792fb86b2017c4f133f2a8db87f239d1d28a78cf0868: error acquiring lock 0 for volume 86e73f082e344dad38c8792fb86b2017c4f133f2a8db87f239d1d28a78cf0868: file exists" +Jul 22 13:50:54 nagato.nanadai.me podman[1527]: time="2020-07-22T13:50:54-04:00" level=error msg="Error refreshing volume 9a16ea764be490a5563e384d9074ab0495e4d9119be380c664037d6cf1215631: error acquiring lock 0 for volume 9a16ea764be490a5563e384d9074ab0495e4d9119be380c664037d6cf1215631: file exists" +Jul 22 13:50:54 nagato.nanadai.me podman[1527]: time="2020-07-22T13:50:54-04:00" level=error msg="Error refreshing volume bfd6b2a97217f8655add13e0ad3f6b8e1c79bc1519b7a1e15361a107ccf57fc0: error acquiring lock 0 for volume bfd6b2a97217f8655add13e0ad3f6b8e1c79bc1519b7a1e15361a107ccf57fc0: file exists" +Jul 22 13:50:54 nagato.nanadai.me podman[1527]: time="2020-07-22T13:50:54-04:00" level=error msg="Error refreshing volume f9b9f630982452ebcbed24bd229b142fbeecd5d4c85791fca440b21d56fef563: error acquiring lock 0 for volume f9b9f630982452ebcbed24bd229b142fbeecd5d4c85791fca440b21d56fef563: file exists" +Jul 22 13:50:54 nagato.nanadai.me podman[1527]: Trying to pull registry.fedoraproject.org/fedora:latest... +Jul 22 13:50:55 nagato.nanadai.me podman[1527]: Getting image source signatures +Jul 22 13:50:55 nagato.nanadai.me podman[1527]: Copying blob sha256:dd9f43919ba05f05d4f783c31e83e5e776c4f5d29dd72b9ec5056b9576c10053 +Jul 22 13:50:55 nagato.nanadai.me podman[1527]: Copying config sha256:00ff39a8bf19f810a7e641f7eb3ddc47635913a19c4996debd91fafb6b379069 +Jul 22 13:50:55 nagato.nanadai.me podman[1527]: Writing manifest to image destination +Jul 22 13:50:55 nagato.nanadai.me podman[1527]: Storing signatures +Jul 22 13:50:55 nagato.nanadai.me systemd[1048]: podman.service: unit configures an IP firewall, but not running as root. +Jul 22 13:50:55 nagato.nanadai.me systemd[1048]: (This warning is only shown for the first unit using IP firewalling.) +Jul 22 13:51:15 nagato.nanadai.me systemd[1048]: podman.service: Succeeded. +Jul 22 13:51:15 nagato.nanadai.me systemd[1048]: Finished Podman API Service. +Jul 22 13:51:15 nagato.nanadai.me systemd[1048]: podman.service: Consumed 1.339s CPU time. +$ +``` + +You can also verify that the information being passed back and forth is correct by putting +with a tool like `socat`, which can dump what the socket is seeing. -- cgit v1.2.3-54-g00ecf