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podman-generate-systemd --new

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Add a --new flag to podman-generate-systemd to create a new container
via podman-run instead of starting an existing container.

Creating a new container presents the challenge to find a reverse
mapping from a container to the CLI flags it can be created with.  We
are doing this via `(Container).Config.CreateCommand` field, which
includes a copy of the process' command from procFS at creating time.
This field may not be useful when the container was not created via the
Podman CLI (e.g., via a Python script).  Hence, we do not guarantee the
correctness of the generated files.

Signed-off-by: Valentin Rothberg <rothberg@redhat.com>
This commit is contained in:
Valentin Rothberg
2020-01-09 12:27:24 +01:00
parent f3fc10feb4
commit 816e50ba02
7 changed files with 153 additions and 11 deletions
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51
pkg/systemdgen/systemdgen_test.go
View File

@@ -44,9 +44,9 @@ Documentation=man:podman-generate-systemd(1)
Restart=always
ExecStart=/usr/bin/podman start 639c53578af4d84b8800b4635fa4e680ee80fd67e0e6a2d4eea48d1e3230f401
ExecStop=/usr/bin/podman stop -t 10 639c53578af4d84b8800b4635fa4e680ee80fd67e0e6a2d4eea48d1e3230f401
PIDFile=/var/run/containers/storage/overlay-containers/639c53578af4d84b8800b4635fa4e680ee80fd67e0e6a2d4eea48d1e3230f401/userdata/conmon.pid
KillMode=none
Type=forking
PIDFile=/var/run/containers/storage/overlay-containers/639c53578af4d84b8800b4635fa4e680ee80fd67e0e6a2d4eea48d1e3230f401/userdata/conmon.pid
[Install]
WantedBy=multi-user.target`
@@ -62,9 +62,9 @@ Documentation=man:podman-generate-systemd(1)
Restart=always
ExecStart=/usr/bin/podman start foobar
ExecStop=/usr/bin/podman stop -t 10 foobar
PIDFile=/var/run/containers/storage/overlay-containers/639c53578af4d84b8800b4635fa4e680ee80fd67e0e6a2d4eea48d1e3230f401/userdata/conmon.pid
KillMode=none
Type=forking
PIDFile=/var/run/containers/storage/overlay-containers/639c53578af4d84b8800b4635fa4e680ee80fd67e0e6a2d4eea48d1e3230f401/userdata/conmon.pid
[Install]
WantedBy=multi-user.target`
@@ -84,9 +84,9 @@ After=a.service b.service c.service pod.service
Restart=always
ExecStart=/usr/bin/podman start foobar
ExecStop=/usr/bin/podman stop -t 10 foobar
PIDFile=/var/run/containers/storage/overlay-containers/639c53578af4d84b8800b4635fa4e680ee80fd67e0e6a2d4eea48d1e3230f401/userdata/conmon.pid
KillMode=none
Type=forking
PIDFile=/var/run/containers/storage/overlay-containers/639c53578af4d84b8800b4635fa4e680ee80fd67e0e6a2d4eea48d1e3230f401/userdata/conmon.pid
[Install]
WantedBy=multi-user.target`
@@ -104,9 +104,29 @@ Before=container-1.service container-2.service
Restart=always
ExecStart=/usr/bin/podman start jadda-jadda-infra
ExecStop=/usr/bin/podman stop -t 10 jadda-jadda-infra
PIDFile=/var/run/containers/storage/overlay-containers/639c53578af4d84b8800b4635fa4e680ee80fd67e0e6a2d4eea48d1e3230f401/userdata/conmon.pid
KillMode=none
Type=forking
[Install]
WantedBy=multi-user.target`
goodNameNew := `# jadda-jadda.service
# autogenerated by Podman CI
[Unit]
Description=Podman jadda-jadda.service
Documentation=man:podman-generate-systemd(1)
[Service]
Restart=always
ExecStartPre=/usr/bin/rm -f /%t/%n-pid /%t/%n-cid
ExecStart=/usr/bin/podman run --conmon-pidfile /%t/%n-pid --cidfile /%t/%n-cid --name jadda-jadda --hostname hello-world awesome-image:latest command arg1 ... argN
ExecStop=/usr/bin/podman stop --cidfile /%t/%n-cid -t 42
ExecStopPost=/usr/bin/podman rm -f --cidfile /%t/%n-cid
PIDFile=/%t/%n-pid
KillMode=none
Type=forking
PIDFile=/var/run/containers/storage/overlay-containers/639c53578af4d84b8800b4635fa4e680ee80fd67e0e6a2d4eea48d1e3230f401/userdata/conmon.pid
[Install]
WantedBy=multi-user.target`
@@ -184,16 +204,35 @@ WantedBy=multi-user.target`
"",
true,
},
{"good with name and generic",
ContainerInfo{
Executable: "/usr/bin/podman",
ServiceName: "jadda-jadda",
ContainerName: "jadda-jadda",
RestartPolicy: "always",
PIDFile: "/var/run/containers/storage/overlay-containers/639c53578af4d84b8800b4635fa4e680ee80fd67e0e6a2d4eea48d1e3230f401/userdata/conmon.pid",
StopTimeout: 42,
PodmanVersion: "CI",
New: true,
CreateCommand: []string{"I'll get stripped", "container", "run", "--name", "jadda-jadda", "--hostname", "hello-world", "awesome-image:latest", "command", "arg1", "...", "argN"},
},
goodNameNew,
false,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
got, err := CreateContainerSystemdUnit(&tt.info, false)
opts := Options{
Files: false,
New: tt.info.New,
}
got, err := CreateContainerSystemdUnit(&tt.info, opts)
if (err != nil) != tt.wantErr {
t.Errorf("CreateContainerSystemdUnit() error = \n%v, wantErr \n%v", err, tt.wantErr)
return
}
if got != tt.want {
t.Errorf("CreateContainerSystemdUnit() = \n%v, want \n%v", got, tt.want)
t.Errorf("CreateContainerSystemdUnit() = \n%v\n---------> want\n%v", got, tt.want)
}
})
}