From c3f6ef63a27ae23f79995c4019d552ed4dfdd406 Mon Sep 17 00:00:00 2001 From: Valentin Rothberg Date: Tue, 8 Jun 2021 13:44:49 +0200 Subject: logs: k8s-file: fix race Fix a race in the k8s-file logs driver. When "following" the logs, Podman will print the container's logs until the end. Previously, Podman logged until the state transitioned into something non-running which opened up a race with the container still running, possibly in the "stopping" state. To fix the race, log until we've seen the wait event for the specific container. In that case, conmon will have finished writing all logs to the file, and Podman will read it until EOF. Further tweak the integration tests for testing `logs -f` on a running container. Previously, the test only checked for one of two lines stating that there was a race. Indeed the race was in using `run --rm` where a log file may be removed before we could fully read it. Fixes: #10596 Signed-off-by: Valentin Rothberg --- test/e2e/logs_test.go | 14 ++++++++------ 1 file changed, 8 insertions(+), 6 deletions(-) (limited to 'test') diff --git a/test/e2e/logs_test.go b/test/e2e/logs_test.go index 3051031a5..b7a5a6243 100644 --- a/test/e2e/logs_test.go +++ b/test/e2e/logs_test.go @@ -173,9 +173,9 @@ var _ = Describe("Podman logs", func() { }) It("streaming output: "+log, func() { - containerName := "logs-f-rm" + containerName := "logs-f" - logc := podmanTest.Podman([]string{"run", "--log-driver", log, "--rm", "--name", containerName, "-dt", ALPINE, "sh", "-c", "echo podman; sleep 1; echo podman"}) + logc := podmanTest.Podman([]string{"run", "--log-driver", log, "--name", containerName, "-dt", ALPINE, "sh", "-c", "echo podman-1; sleep 1; echo podman-2"}) logc.WaitWithDefaultTimeout() Expect(logc).To(Exit(0)) @@ -183,10 +183,8 @@ var _ = Describe("Podman logs", func() { results.WaitWithDefaultTimeout() Expect(results).To(Exit(0)) - // TODO: we should actually check for two podman lines, - // but as of 2020-06-17 there's a race condition in which - // 'logs -f' may not catch all output from a container - Expect(results.OutputToString()).To(ContainSubstring("podman")) + Expect(results.OutputToString()).To(ContainSubstring("podman-1")) + Expect(results.OutputToString()).To(ContainSubstring("podman-2")) // Container should now be terminatING or terminatED, but we // have no guarantee of which: 'logs -f' does not necessarily @@ -199,6 +197,10 @@ var _ = Describe("Podman logs", func() { } else { Expect(inspect.ErrorToString()).To(ContainSubstring("no such container")) } + + results = podmanTest.Podman([]string{"rm", "-f", containerName}) + results.WaitWithDefaultTimeout() + Expect(results).To(Exit(0)) }) It("follow output stopped container: "+log, func() { -- cgit v1.2.3-54-g00ecf