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authorDanila Kiver <danila.kiver@mail.ru>2019-07-04 03:58:37 +0300
committerDanila Kiver <danila.kiver@mail.ru>2019-07-04 03:58:37 +0300
commita54429cf877e899eb1516e3ee71ae9c6eedd7c5a (patch)
treefe676086d21daefe2f1650efbbe7bd2cd7fa1217
parentf5593d305f68409cf093ea6b66a9d1f121ec0fd6 (diff)
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Use conmon pidfile in generated systemd unit as PIDFile.
By default, podman points PIDFile in generated unit file to non-existent location. As a result, the unit file, generated by podman, is broken: an attempt to start this unit without prior modification results in a crash, because systemd can not find the pidfile of service's main process. Fix the value of "PIDFile" and add a system test for this case. Signed-off-by: Danila Kiver <danila.kiver@mail.ru>
-rw-r--r--docs/podman-generate-systemd.1.md4
-rw-r--r--pkg/adapter/containers.go9
-rw-r--r--pkg/systemdgen/systemdgen.go5
-rw-r--r--pkg/systemdgen/systemdgen_test.go14
-rw-r--r--test/system/250-generate-systemd.bats42
-rw-r--r--test/system/helpers.bash11
6 files changed, 72 insertions, 13 deletions
diff --git a/docs/podman-generate-systemd.1.md b/docs/podman-generate-systemd.1.md
index 09752480d..64e68a69a 100644
--- a/docs/podman-generate-systemd.1.md
+++ b/docs/podman-generate-systemd.1.md
@@ -39,7 +39,7 @@ ExecStart=/usr/bin/podman start c21da63c4783be2ac2cd3487ef8d2ec15ee2a28f63dd8f14
ExecStop=/usr/bin/podman stop -t 10 c21da63c4783be2ac2cd3487ef8d2ec15ee2a28f63dd8f145e3b05607f31cffc
KillMode=none
Type=forking
-PIDFile=/var/lib/containers/storage/overlay-containers/c21da63c4783be2ac2cd3487ef8d2ec15ee2a28f63dd8f145e3b05607f31cffc/userdata/c21da63c4783be2ac2cd3487ef8d2ec15ee2a28f63dd8f145e3b05607f31cffc.pid
+PIDFile=/var/run/containers/storage/overlay-containers/c21da63c4783be2ac2cd3487ef8d2ec15ee2a28f63dd8f145e3b05607f31cffc/userdata/conmon.pid
[Install]
WantedBy=multi-user.target
```
@@ -55,7 +55,7 @@ ExecStart=/usr/bin/podman start c21da63c4783be2ac2cd3487ef8d2ec15ee2a28f63dd8f14
ExecStop=/usr/bin/podman stop -t 1 c21da63c4783be2ac2cd3487ef8d2ec15ee2a28f63dd8f145e3b05607f31cffc
KillMode=none
Type=forking
-PIDFile=/var/lib/containers/storage/overlay-containers/c21da63c4783be2ac2cd3487ef8d2ec15ee2a28f63dd8f145e3b05607f31cffc/userdata/c21da63c4783be2ac2cd3487ef8d2ec15ee2a28f63dd8f145e3b05607f31cffc.pid
+PIDFile=/var/run/containers/storage/overlay-containers/c21da63c4783be2ac2cd3487ef8d2ec15ee2a28f63dd8f145e3b05607f31cffc/userdata/conmon.pid
[Install]
WantedBy=multi-user.target
```
diff --git a/pkg/adapter/containers.go b/pkg/adapter/containers.go
index 10720886b..0ea89a72c 100644
--- a/pkg/adapter/containers.go
+++ b/pkg/adapter/containers.go
@@ -1058,7 +1058,14 @@ func (r *LocalRuntime) GenerateSystemd(c *cliconfig.GenerateSystemdValues) (stri
if c.Name {
name = ctr.Name()
}
- return systemdgen.CreateSystemdUnitAsString(name, ctr.ID(), c.RestartPolicy, ctr.Config().StaticDir, timeout)
+
+ config := ctr.Config()
+ conmonPidFile := config.ConmonPidFile
+ if conmonPidFile == "" {
+ return "", errors.Errorf("conmon PID file path is empty, try to recreate the container with --conmon-pidfile flag")
+ }
+
+ return systemdgen.CreateSystemdUnitAsString(name, ctr.ID(), c.RestartPolicy, conmonPidFile, timeout)
}
// GetNamespaces returns namespace information about a container for PS
diff --git a/pkg/systemdgen/systemdgen.go b/pkg/systemdgen/systemdgen.go
index 3d1c31b5d..fb91b3e82 100644
--- a/pkg/systemdgen/systemdgen.go
+++ b/pkg/systemdgen/systemdgen.go
@@ -2,7 +2,6 @@ package systemdgen
import (
"fmt"
- "path/filepath"
"github.com/pkg/errors"
)
@@ -33,11 +32,11 @@ func ValidateRestartPolicy(restart string) error {
// CreateSystemdUnitAsString takes variables to create a systemd unit file used to control
// a libpod container
-func CreateSystemdUnitAsString(name, cid, restart, pidPath string, stopTimeout int) (string, error) {
+func CreateSystemdUnitAsString(name, cid, restart, pidFile string, stopTimeout int) (string, error) {
if err := ValidateRestartPolicy(restart); err != nil {
return "", err
}
- pidFile := filepath.Join(pidPath, fmt.Sprintf("%s.pid", cid))
+
unit := fmt.Sprintf(template, name, restart, name, stopTimeout, name, pidFile)
return unit, nil
}
diff --git a/pkg/systemdgen/systemdgen_test.go b/pkg/systemdgen/systemdgen_test.go
index f2f49e750..a0f6a1889 100644
--- a/pkg/systemdgen/systemdgen_test.go
+++ b/pkg/systemdgen/systemdgen_test.go
@@ -41,7 +41,7 @@ ExecStart=/usr/bin/podman start 639c53578af4d84b8800b4635fa4e680ee80fd67e0e6a2d4
ExecStop=/usr/bin/podman stop -t 10 639c53578af4d84b8800b4635fa4e680ee80fd67e0e6a2d4eea48d1e3230f401
KillMode=none
Type=forking
-PIDFile=/var/lib/containers/storage/overlay-containers/639c53578af4d84b8800b4635fa4e680ee80fd67e0e6a2d4eea48d1e3230f401/userdata/639c53578af4d84b8800b4635fa4e680ee80fd67e0e6a2d4eea48d1e3230f401.pid
+PIDFile=/var/run/containers/storage/overlay-containers/639c53578af4d84b8800b4635fa4e680ee80fd67e0e6a2d4eea48d1e3230f401/userdata/conmon.pid
[Install]
WantedBy=multi-user.target`
@@ -53,7 +53,7 @@ ExecStart=/usr/bin/podman start foobar
ExecStop=/usr/bin/podman stop -t 10 foobar
KillMode=none
Type=forking
-PIDFile=/var/lib/containers/storage/overlay-containers/639c53578af4d84b8800b4635fa4e680ee80fd67e0e6a2d4eea48d1e3230f401/userdata/639c53578af4d84b8800b4635fa4e680ee80fd67e0e6a2d4eea48d1e3230f401.pid
+PIDFile=/var/run/containers/storage/overlay-containers/639c53578af4d84b8800b4635fa4e680ee80fd67e0e6a2d4eea48d1e3230f401/userdata/conmon.pid
[Install]
WantedBy=multi-user.target`
@@ -61,7 +61,7 @@ WantedBy=multi-user.target`
name string
cid string
restart string
- pidPath string
+ pidFile string
stopTimeout int
}
tests := []struct {
@@ -76,7 +76,7 @@ WantedBy=multi-user.target`
"639c53578af4d84b8800b4635fa4e680ee80fd67e0e6a2d4eea48d1e3230f401",
"639c53578af4d84b8800b4635fa4e680ee80fd67e0e6a2d4eea48d1e3230f401",
"always",
- "/var/lib/containers/storage/overlay-containers/639c53578af4d84b8800b4635fa4e680ee80fd67e0e6a2d4eea48d1e3230f401/userdata/",
+ "/var/run/containers/storage/overlay-containers/639c53578af4d84b8800b4635fa4e680ee80fd67e0e6a2d4eea48d1e3230f401/userdata/conmon.pid",
10,
},
goodID,
@@ -87,7 +87,7 @@ WantedBy=multi-user.target`
"foobar",
"639c53578af4d84b8800b4635fa4e680ee80fd67e0e6a2d4eea48d1e3230f401",
"always",
- "/var/lib/containers/storage/overlay-containers/639c53578af4d84b8800b4635fa4e680ee80fd67e0e6a2d4eea48d1e3230f401/userdata/",
+ "/var/run/containers/storage/overlay-containers/639c53578af4d84b8800b4635fa4e680ee80fd67e0e6a2d4eea48d1e3230f401/userdata/conmon.pid",
10,
},
goodName,
@@ -98,7 +98,7 @@ WantedBy=multi-user.target`
"639c53578af4d84b8800b4635fa4e680ee80fd67e0e6a2d4eea48d1e3230f401",
"639c53578af4d84b8800b4635fa4e680ee80fd67e0e6a2d4eea48d1e3230f401",
"never",
- "/var/lib/containers/storage/overlay-containers/639c53578af4d84b8800b4635fa4e680ee80fd67e0e6a2d4eea48d1e3230f401/userdata/",
+ "/var/run/containers/storage/overlay-containers/639c53578af4d84b8800b4635fa4e680ee80fd67e0e6a2d4eea48d1e3230f401/userdata/conmon.pid",
10,
},
"",
@@ -107,7 +107,7 @@ WantedBy=multi-user.target`
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
- got, err := CreateSystemdUnitAsString(tt.args.name, tt.args.cid, tt.args.restart, tt.args.pidPath, tt.args.stopTimeout)
+ got, err := CreateSystemdUnitAsString(tt.args.name, tt.args.cid, tt.args.restart, tt.args.pidFile, tt.args.stopTimeout)
if (err != nil) != tt.wantErr {
t.Errorf("CreateSystemdUnitAsString() error = %v, wantErr %v", err, tt.wantErr)
return
diff --git a/test/system/250-generate-systemd.bats b/test/system/250-generate-systemd.bats
new file mode 100644
index 000000000..87ad69774
--- /dev/null
+++ b/test/system/250-generate-systemd.bats
@@ -0,0 +1,42 @@
+#!/usr/bin/env bats -*- bats -*-
+#
+# Tests generated configurations for systemd.
+#
+
+load helpers
+
+# Be extra paranoid in naming to avoid collisions.
+SERVICE_NAME="podman_test_$(random_string)"
+UNIT_DIR="$HOME/.config/systemd/user"
+UNIT_FILE="$UNIT_DIR/$SERVICE_NAME.service"
+
+function setup() {
+ basic_setup
+ mkdir -p "$UNIT_DIR"
+}
+
+function teardown() {
+ rm -f "$UNIT_FILE"
+ systemctl --user stop "$SERVICE_NAME"
+ basic_teardown
+}
+
+@test "podman generate - systemd - basic" {
+ skip_if_not_systemd
+ skip_if_remote
+
+ run_podman create $IMAGE echo "I'm alive!"
+ cid="$output"
+
+ run_podman generate systemd $cid > "$UNIT_FILE"
+
+ run systemctl --user start "$SERVICE_NAME"
+ if [ $status -ne 0 ]; then
+ die "The systemd service $SERVICE_NAME did not start correctly!"
+ fi
+
+ run_podman logs $cid
+ is "$output" "I'm alive!" "Container output"
+}
+
+# vim: filetype=sh
diff --git a/test/system/helpers.bash b/test/system/helpers.bash
index 29ef19ecc..1db80f111 100644
--- a/test/system/helpers.bash
+++ b/test/system/helpers.bash
@@ -236,6 +236,17 @@ function skip_if_remote() {
skip "${1:-test does not work with podman-remote}"
}
+#########################
+# skip_if_not_systemd # ...with an optional message
+#########################
+function skip_if_not_systemd() {
+ if systemctl --user >/dev/null 2>&1; then
+ return
+ fi
+
+ skip "${1:-no systemd or daemon does not respond}"
+}
+
#########
# die # Abort with helpful message
#########