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Make podman generate systemd --new flag parsing more robust

Browse Source 
First, use the pflag library to parse the flags. With this we can
handle all corner cases such as -td or --detach=false.

Second, preserve the root args with --new. They are used for all podman
commands in the unit file. (e.g. podman --root /tmp run alpine)

Signed-off-by: Paul Holzinger <paul.holzinger@web.de>
This commit is contained in:
Paul Holzinger
2020-12-29 16:24:01 +01:00
parent 355e387692
commit ef82be4e00
6 changed files with 501 additions and 161 deletions
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169
test/e2e/generate_systemd_test.go
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@ -59,8 +59,7 @@ var _ = Describe("Podman generate systemd", func() {
session = podmanTest.Podman([]string{"generate", "systemd", "--restart-policy", "bogus", "foobar"})
session.WaitWithDefaultTimeout()
Expect(session).To(ExitWithError())
found, _ := session.ErrorGrepString("bogus is not a valid restart policy")
Expect(found).Should(BeTrue())
Expect(session.ErrorToString()).To(ContainSubstring("bogus is not a valid restart policy"))
})
It("podman generate systemd good timeout value", func() {
@ -71,12 +70,8 @@ var _ = Describe("Podman generate systemd", func() {
session = podmanTest.Podman([]string{"generate", "systemd", "--time", "1234", "foobar"})
session.WaitWithDefaultTimeout()
Expect(session.ExitCode()).To(Equal(0))
found, _ := session.GrepString(" stop -t 1234 ")
Expect(found).To(BeTrue())
found, _ = session.GrepString("TimeoutStopSec=1294")
Expect(found).To(BeTrue())
Expect(session.OutputToString()).To(ContainSubstring("TimeoutStopSec=1294"))
Expect(session.OutputToString()).To(ContainSubstring(" stop -t 1234 "))
})
It("podman generate systemd", func() {
@ -87,6 +82,9 @@ var _ = Describe("Podman generate systemd", func() {
session := podmanTest.Podman([]string{"generate", "systemd", "nginx"})
session.WaitWithDefaultTimeout()
Expect(session.ExitCode()).To(Equal(0))
// The podman commands in the unit should not contain the root flags
Expect(session.OutputToString()).ToNot(ContainSubstring(" --runroot"))
})
It("podman generate systemd --files --name", func() {
@ -101,9 +99,7 @@ var _ = Describe("Podman generate systemd", func() {
for _, file := range session.OutputToStringArray() {
os.Remove(file)
}
found, _ := session.GrepString("/container-nginx.service")
Expect(found).To(BeTrue())
Expect(session.OutputToString()).To(ContainSubstring("/container-nginx.service"))
})
It("podman generate systemd with timeout", func() {
@ -114,9 +110,7 @@ var _ = Describe("Podman generate systemd", func() {
session := podmanTest.Podman([]string{"generate", "systemd", "--time", "5", "nginx"})
session.WaitWithDefaultTimeout()
Expect(session.ExitCode()).To(Equal(0))
found, _ := session.GrepString("podman stop -t 5")
Expect(found).To(BeTrue())
Expect(session.OutputToString()).To(ContainSubstring("podman stop -t 5"))
})
It("podman generate systemd pod --name", func() {
@ -137,35 +131,19 @@ var _ = Describe("Podman generate systemd", func() {
Expect(session.ExitCode()).To(Equal(0))
// Grepping the output (in addition to unit tests)
found, _ := session.GrepString("# pod-foo.service")
Expect(found).To(BeTrue())
Expect(session.OutputToString()).To(ContainSubstring("# pod-foo.service"))
Expect(session.OutputToString()).To(ContainSubstring("Requires=container-foo-1.service container-foo-2.service"))
Expect(session.OutputToString()).To(ContainSubstring("# container-foo-1.service"))
Expect(session.OutputToString()).To(ContainSubstring(" start foo-1"))
Expect(session.OutputToString()).To(ContainSubstring("-infra")) // infra container
Expect(session.OutputToString()).To(ContainSubstring("# container-foo-2.service"))
Expect(session.OutputToString()).To(ContainSubstring(" stop -t 42 foo-2"))
Expect(session.OutputToString()).To(ContainSubstring("BindsTo=pod-foo.service"))
Expect(session.OutputToString()).To(ContainSubstring("PIDFile="))
Expect(session.OutputToString()).To(ContainSubstring("/userdata/conmon.pid"))
found, _ = session.GrepString("Requires=container-foo-1.service container-foo-2.service")
Expect(found).To(BeTrue())
found, _ = session.GrepString("# container-foo-1.service")
Expect(found).To(BeTrue())
found, _ = session.GrepString(" start foo-1")
Expect(found).To(BeTrue())
found, _ = session.GrepString("-infra") // infra container
Expect(found).To(BeTrue())
found, _ = session.GrepString("# container-foo-2.service")
Expect(found).To(BeTrue())
found, _ = session.GrepString(" stop -t 42 foo-2")
Expect(found).To(BeTrue())
found, _ = session.GrepString("BindsTo=pod-foo.service")
Expect(found).To(BeTrue())
found, _ = session.GrepString("PIDFile=")
Expect(found).To(BeTrue())
found, _ = session.GrepString("/userdata/conmon.pid")
Expect(found).To(BeTrue())
// The podman commands in the unit should not contain the root flags
Expect(session.OutputToString()).ToNot(ContainSubstring(" --runroot"))
})
It("podman generate systemd pod --name --files", func() {
@ -185,11 +163,8 @@ var _ = Describe("Podman generate systemd", func() {
os.Remove(file)
}
found, _ := session.GrepString("/pod-foo.service")
Expect(found).To(BeTrue())
found, _ = session.GrepString("/container-foo-1.service")
Expect(found).To(BeTrue())
Expect(session.OutputToString()).To(ContainSubstring("/pod-foo.service"))
Expect(session.OutputToString()).To(ContainSubstring("/container-foo-1.service"))
})
It("podman generate systemd --new --name foo", func() {
@ -202,14 +177,13 @@ var _ = Describe("Podman generate systemd", func() {
Expect(session.ExitCode()).To(Equal(0))
// Grepping the output (in addition to unit tests)
found, _ := session.GrepString("# container-foo.service")
Expect(found).To(BeTrue())
found, _ = session.GrepString(" --replace ")
Expect(found).To(BeTrue())
found, _ = session.GrepString("stop --ignore --cidfile %t/container-foo.ctr-id -t 42")
Expect(found).To(BeTrue())
Expect(session.OutputToString()).To(ContainSubstring("# container-foo.service"))
Expect(session.OutputToString()).To(ContainSubstring(" --replace "))
Expect(session.OutputToString()).To(ContainSubstring(" stop --ignore --cidfile %t/container-foo.ctr-id -t 42"))
if !IsRemote() {
// The podman commands in the unit should contain the root flags if generate systemd --new is used
Expect(session.OutputToString()).To(ContainSubstring(" --runroot"))
}
})
It("podman generate systemd --new --name=foo", func() {
@ -222,14 +196,9 @@ var _ = Describe("Podman generate systemd", func() {
Expect(session.ExitCode()).To(Equal(0))
// Grepping the output (in addition to unit tests)
found, _ := session.GrepString("# container-foo.service")
Expect(found).To(BeTrue())
found, _ = session.GrepString(" --replace ")
Expect(found).To(BeTrue())
found, _ = session.GrepString("stop --ignore --cidfile %t/container-foo.ctr-id -t 42")
Expect(found).To(BeTrue())
Expect(session.OutputToString()).To(ContainSubstring("# container-foo.service"))
Expect(session.OutputToString()).To(ContainSubstring(" --replace "))
Expect(session.OutputToString()).To(ContainSubstring(" stop --ignore --cidfile %t/container-foo.ctr-id -t 42"))
})
It("podman generate systemd --new without explicit detaching param", func() {
@ -242,8 +211,7 @@ var _ = Describe("Podman generate systemd", func() {
Expect(session.ExitCode()).To(Equal(0))
// Grepping the output (in addition to unit tests)
found, _ := session.GrepString("--cgroups=no-conmon -d")
Expect(found).To(BeTrue())
Expect(session.OutputToString()).To(ContainSubstring("--cgroups=no-conmon -d"))
})
It("podman generate systemd --new with explicit detaching param in middle", func() {
@ -256,8 +224,7 @@ var _ = Describe("Podman generate systemd", func() {
Expect(session.ExitCode()).To(Equal(0))
// Grepping the output (in addition to unit tests)
found, _ := session.GrepString("--name foo alpine top")
Expect(found).To(BeTrue())
Expect(session.OutputToString()).To(ContainSubstring("--name foo alpine top"))
})
It("podman generate systemd --new pod", func() {
@ -280,8 +247,8 @@ var _ = Describe("Podman generate systemd", func() {
Expect(session.ExitCode()).To(Equal(0))
// Grepping the output (in addition to unit tests)
found, _ := session.GrepString("# con-foo.service")
Expect(found).To(BeTrue())
Expect(session.OutputToString()).To(ContainSubstring("# con-foo.service"))
})
It("podman generate systemd --separator _", func() {
@ -294,8 +261,7 @@ var _ = Describe("Podman generate systemd", func() {
Expect(session.ExitCode()).To(Equal(0))
// Grepping the output (in addition to unit tests)
found, _ := session.GrepString("# container_foo.service")
Expect(found).To(BeTrue())
Expect(session.OutputToString()).To(ContainSubstring("# container_foo.service"))
})
It("podman generate systemd pod --pod-prefix p", func() {
@ -316,17 +282,10 @@ var _ = Describe("Podman generate systemd", func() {
Expect(session.ExitCode()).To(Equal(0))
// Grepping the output (in addition to unit tests)
found, _ := session.GrepString("# p-foo.service")
Expect(found).To(BeTrue())
found, _ = session.GrepString("Requires=container-foo-1.service container-foo-2.service")
Expect(found).To(BeTrue())
found, _ = session.GrepString("# container-foo-1.service")
Expect(found).To(BeTrue())
found, _ = session.GrepString("BindsTo=p-foo.service")
Expect(found).To(BeTrue())
Expect(session.OutputToString()).To(ContainSubstring("# p-foo.service"))
Expect(session.OutputToString()).To(ContainSubstring("Requires=container-foo-1.service container-foo-2.service"))
Expect(session.OutputToString()).To(ContainSubstring("# container-foo-1.service"))
Expect(session.OutputToString()).To(ContainSubstring("BindsTo=p-foo.service"))
})
It("podman generate systemd pod --pod-prefix p --container-prefix con --separator _ change all prefixes/separator", func() {
@ -347,20 +306,11 @@ var _ = Describe("Podman generate systemd", func() {
Expect(session.ExitCode()).To(Equal(0))
// Grepping the output (in addition to unit tests)
found, _ := session.GrepString("# p_foo.service")
Expect(found).To(BeTrue())
found, _ = session.GrepString("Requires=con_foo-1.service con_foo-2.service")
Expect(found).To(BeTrue())
found, _ = session.GrepString("# con_foo-1.service")
Expect(found).To(BeTrue())
found, _ = session.GrepString("# con_foo-2.service")
Expect(found).To(BeTrue())
found, _ = session.GrepString("BindsTo=p_foo.service")
Expect(found).To(BeTrue())
Expect(session.OutputToString()).To(ContainSubstring("# p_foo.service"))
Expect(session.OutputToString()).To(ContainSubstring("Requires=con_foo-1.service con_foo-2.service"))
Expect(session.OutputToString()).To(ContainSubstring("# con_foo-1.service"))
Expect(session.OutputToString()).To(ContainSubstring("# con_foo-2.service"))
Expect(session.OutputToString()).To(ContainSubstring("BindsTo=p_foo.service"))
})
It("podman generate systemd pod with containers --new", func() {
@ -386,26 +336,13 @@ var _ = Describe("Podman generate systemd", func() {
Expect(session.ExitCode()).To(Equal(0))
// Grepping the output (in addition to unit tests)
found, _ := session.GrepString("# pod-foo.service")
Expect(found).To(BeTrue())
found, _ = session.GrepString("Requires=container-foo-1.service container-foo-2.service")
Expect(found).To(BeTrue())
found, _ = session.GrepString("BindsTo=pod-foo.service")
Expect(found).To(BeTrue())
found, _ = session.GrepString("pod create --infra-conmon-pidfile %t/pod-foo.pid --pod-id-file %t/pod-foo.pod-id --name foo")
Expect(found).To(BeTrue())
found, _ = session.GrepString("ExecStartPre=/bin/rm -f %t/pod-foo.pid %t/pod-foo.pod-id")
Expect(found).To(BeTrue())
found, _ = session.GrepString("pod stop --ignore --pod-id-file %t/pod-foo.pod-id -t 10")
Expect(found).To(BeTrue())
found, _ = session.GrepString("pod rm --ignore -f --pod-id-file %t/pod-foo.pod-id")
Expect(found).To(BeTrue())
Expect(session.OutputToString()).To(ContainSubstring("# pod-foo.service"))
Expect(session.OutputToString()).To(ContainSubstring("Requires=container-foo-1.service container-foo-2.service"))
Expect(session.OutputToString()).To(ContainSubstring("BindsTo=pod-foo.service"))
Expect(session.OutputToString()).To(ContainSubstring("pod create --infra-conmon-pidfile %t/pod-foo.pid --pod-id-file %t/pod-foo.pod-id --name foo"))
Expect(session.OutputToString()).To(ContainSubstring("ExecStartPre=/bin/rm -f %t/pod-foo.pid %t/pod-foo.pod-id"))
Expect(session.OutputToString()).To(ContainSubstring("pod stop --ignore --pod-id-file %t/pod-foo.pod-id -t 10"))
Expect(session.OutputToString()).To(ContainSubstring("pod rm --ignore -f --pod-id-file %t/pod-foo.pod-id"))
})
It("podman generate systemd --format json", func() {