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authorValentin Rothberg <rothberg@redhat.com>2020-06-17 14:48:19 +0200
committerValentin Rothberg <rothberg@redhat.com>2020-06-17 18:52:44 +0200
commite5c3432944245a740ed443803c654dcc9c3757f0 (patch)
treed95dd4508d1e3f847cda3787586062acecd165e1 /pkg/systemd
parentf293606480669acea375c53de1e2c81044313c05 (diff)
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generate systemd: `ExecStopPost` for all units
Add an `ExecStopPost` run even for units generated without `--new`. Although it may seem redundant to run `container/pod stop` twice at first glance, we really need the post run. If the main PID (i.e., conmon) is killed, systemd will not execute `ExecStop` but only the post one. We made this obeservation in a customer issue and could reproduce the behavior consistently. Hence, the post run is needed to properly clean up when conmon is killed and it's pretty much a NOP in all other cases. Credits to Ulrich Obergfell for throrough and detailed analyses, which ultimately lead to this fix. Signed-off-by: Valentin Rothberg <rothberg@redhat.com>
Diffstat (limited to 'pkg/systemd')
-rw-r--r--pkg/systemd/generate/containers.go3
-rw-r--r--pkg/systemd/generate/containers_test.go3
-rw-r--r--pkg/systemd/generate/pods.go3
-rw-r--r--pkg/systemd/generate/pods_test.go1
4 files changed, 6 insertions, 4 deletions
diff --git a/pkg/systemd/generate/containers.go b/pkg/systemd/generate/containers.go
index 4180022cb..16ff0b821 100644
--- a/pkg/systemd/generate/containers.go
+++ b/pkg/systemd/generate/containers.go
@@ -83,9 +83,7 @@ ExecStartPre={{.ExecStartPre}}
{{- end}}
ExecStart={{.ExecStart}}
ExecStop={{.ExecStop}}
-{{- if .ExecStopPost}}
ExecStopPost={{.ExecStopPost}}
-{{- end}}
PIDFile={{.PIDFile}}
KillMode=none
Type=forking
@@ -170,6 +168,7 @@ func executeContainerTemplate(info *containerInfo, options entities.GenerateSyst
info.EnvVariable = EnvVariable
info.ExecStart = "{{.Executable}} start {{.ContainerNameOrID}}"
info.ExecStop = "{{.Executable}} stop {{if (ge .StopTimeout 0)}}-t {{.StopTimeout}}{{end}} {{.ContainerNameOrID}}"
+ info.ExecStopPost = "{{.Executable}} stop {{if (ge .StopTimeout 0)}}-t {{.StopTimeout}}{{end}} {{.ContainerNameOrID}}"
// Assemble the ExecStart command when creating a new container.
//
diff --git a/pkg/systemd/generate/containers_test.go b/pkg/systemd/generate/containers_test.go
index 8d3ea1ca0..5f35c31f5 100644
--- a/pkg/systemd/generate/containers_test.go
+++ b/pkg/systemd/generate/containers_test.go
@@ -50,6 +50,7 @@ Environment=PODMAN_SYSTEMD_UNIT=%n
Restart=always
ExecStart=/usr/bin/podman start 639c53578af4d84b8800b4635fa4e680ee80fd67e0e6a2d4eea48d1e3230f401
ExecStop=/usr/bin/podman stop -t 10 639c53578af4d84b8800b4635fa4e680ee80fd67e0e6a2d4eea48d1e3230f401
+ExecStopPost=/usr/bin/podman stop -t 10 639c53578af4d84b8800b4635fa4e680ee80fd67e0e6a2d4eea48d1e3230f401
PIDFile=/var/run/containers/storage/overlay-containers/639c53578af4d84b8800b4635fa4e680ee80fd67e0e6a2d4eea48d1e3230f401/userdata/conmon.pid
KillMode=none
Type=forking
@@ -71,6 +72,7 @@ Environment=PODMAN_SYSTEMD_UNIT=%n
Restart=always
ExecStart=/usr/bin/podman start foobar
ExecStop=/usr/bin/podman stop -t 10 foobar
+ExecStopPost=/usr/bin/podman stop -t 10 foobar
PIDFile=/var/run/containers/storage/overlay-containers/639c53578af4d84b8800b4635fa4e680ee80fd67e0e6a2d4eea48d1e3230f401/userdata/conmon.pid
KillMode=none
Type=forking
@@ -96,6 +98,7 @@ Environment=PODMAN_SYSTEMD_UNIT=%n
Restart=always
ExecStart=/usr/bin/podman start foobar
ExecStop=/usr/bin/podman stop -t 10 foobar
+ExecStopPost=/usr/bin/podman stop -t 10 foobar
PIDFile=/var/run/containers/storage/overlay-containers/639c53578af4d84b8800b4635fa4e680ee80fd67e0e6a2d4eea48d1e3230f401/userdata/conmon.pid
KillMode=none
Type=forking
diff --git a/pkg/systemd/generate/pods.go b/pkg/systemd/generate/pods.go
index 367b8381f..1bd0c7bce 100644
--- a/pkg/systemd/generate/pods.go
+++ b/pkg/systemd/generate/pods.go
@@ -82,9 +82,7 @@ ExecStartPre={{.ExecStartPre2}}
{{- end}}
ExecStart={{.ExecStart}}
ExecStop={{.ExecStop}}
-{{- if .ExecStopPost}}
ExecStopPost={{.ExecStopPost}}
-{{- end}}
PIDFile={{.PIDFile}}
KillMode=none
Type=forking
@@ -236,6 +234,7 @@ func executePodTemplate(info *podInfo, options entities.GenerateSystemdOptions)
info.EnvVariable = EnvVariable
info.ExecStart = "{{.Executable}} start {{.InfraNameOrID}}"
info.ExecStop = "{{.Executable}} stop {{if (ge .StopTimeout 0)}}-t {{.StopTimeout}}{{end}} {{.InfraNameOrID}}"
+ info.ExecStopPost = "{{.Executable}} stop {{if (ge .StopTimeout 0)}}-t {{.StopTimeout}}{{end}} {{.InfraNameOrID}}"
// Assemble the ExecStart command when creating a new pod.
//
diff --git a/pkg/systemd/generate/pods_test.go b/pkg/systemd/generate/pods_test.go
index f7ce33a30..e12222317 100644
--- a/pkg/systemd/generate/pods_test.go
+++ b/pkg/systemd/generate/pods_test.go
@@ -52,6 +52,7 @@ Environment=PODMAN_SYSTEMD_UNIT=%n
Restart=always
ExecStart=/usr/bin/podman start jadda-jadda-infra
ExecStop=/usr/bin/podman stop -t 10 jadda-jadda-infra
+ExecStopPost=/usr/bin/podman stop -t 10 jadda-jadda-infra
PIDFile=/var/run/containers/storage/overlay-containers/639c53578af4d84b8800b4635fa4e680ee80fd67e0e6a2d4eea48d1e3230f401/userdata/conmon.pid
KillMode=none
Type=forking