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authorEd Santiago <santiago@redhat.com>2021-02-02 14:17:15 -0700
committerEd Santiago <santiago@redhat.com>2021-02-02 17:48:00 -0700
commit1c50e09b065ea113e0a138abbed232b54c8b96a5 (patch)
tree6f9b9515d7dacf397b28290ceba6a505d9c424d7 /test
parentd1e0afdd47c1868ce0d22e48ae9b0b9d89ba6274 (diff)
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System test for #9096 (truncated stdout)
This actually tests conmon, not podman; but that's the whole point of system tests in the first place: if a problem exists, we want to fail loudly, no matter whose fault it is. (I can't get this to fail on my f33 laptop; OP on #9096 claims it only fails on Ubuntu. We'll see what happens in CI). Signed-off-by: Ed Santiago <santiago@redhat.com>
Diffstat (limited to 'test')
-rw-r--r--test/system/030-run.bats39
1 files changed, 39 insertions, 0 deletions
diff --git a/test/system/030-run.bats b/test/system/030-run.bats
index dcf1da370..6c3812dce 100644
--- a/test/system/030-run.bats
+++ b/test/system/030-run.bats
@@ -610,4 +610,43 @@ json-file | f
is "$output" "$randomcontent" "cat random content"
}
+# https://github.com/containers/podman/issues/9096
+# podman exec may truncate stdout/stderr; actually a bug in conmon:
+# https://github.com/containers/conmon/issues/236
+@test "podman run - does not truncate or hang with big output" {
+ # Size, in bytes, to dd and to expect in return
+ char_count=700000
+
+ # Container name; primarily needed when running podman-remote
+ cname=mybigdatacontainer
+
+ # This is one of those cases where BATS is not the best test framework.
+ # We can't do any output redirection, because 'run' overrides it so
+ # as to preserve $output. We can't _not_ do redirection, because BATS
+ # doesn't like NULs in $output (and neither would humans who might
+ # have to read them in an error log).
+ # Workaround: write to a log file, and don't attach stdout.
+ run_podman run --name $cname --attach stderr --log-driver k8s-file \
+ $IMAGE dd if=/dev/zero count=$char_count bs=1
+ is "${lines[0]}" "$char_count+0 records in" "dd: number of records in"
+ is "${lines[1]}" "$char_count+0 records out" "dd: number of records out"
+
+ # We don't have many tests for '-l'. This is as good a place as any
+ if ! is_remote; then
+ cname=-l
+ fi
+
+ # Now find that log file, and count the NULs in it.
+ # The log file is of the form '<timestamp> <P|F> <data>', where P|F
+ # is Partial/Full; I think that's called "kubernetes log format"?
+ run_podman inspect $cname --format '{{.HostConfig.LogConfig.Path}}'
+ logfile="$output"
+
+ count_zero=$(tr -cd '\0' <$logfile | wc -c)
+ is "$count_zero" "$char_count" "count of NULL characters in log"
+
+ # Clean up
+ run_podman rm $cname
+}
+
# vim: filetype=sh