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services_test.go
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// -*- Mode: Go; indent-tabs-mode: t -*-
/*
* Copyright (C) 2014-2021 Canonical Ltd
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 3 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
package wrappers_test
import (
"errors"
"fmt"
"io/ioutil"
"os"
"path/filepath"
"regexp"
"runtime"
"sort"
"strings"
"time"
. "gopkg.in/check.v1"
"github.com/snapcore/snapd/dirs"
"github.com/snapcore/snapd/gadget/quantity"
// imported to ensure actual interfaces are defined (in production this is guaranteed by ifacestate)
_ "github.com/snapcore/snapd/interfaces/builtin"
"github.com/snapcore/snapd/osutil"
"github.com/snapcore/snapd/progress"
"github.com/snapcore/snapd/snap"
"github.com/snapcore/snapd/snap/quota"
"github.com/snapcore/snapd/snap/snaptest"
"github.com/snapcore/snapd/strutil"
"github.com/snapcore/snapd/systemd"
"github.com/snapcore/snapd/systemd/systemdtest"
"github.com/snapcore/snapd/testutil"
"github.com/snapcore/snapd/timings"
"github.com/snapcore/snapd/usersession/agent"
"github.com/snapcore/snapd/wrappers"
)
type servicesTestSuite struct {
testutil.DBusTest
tempdir string
sysdLog [][]string
systemctlRestorer, delaysRestorer func()
perfTimings timings.Measurer
agent *agent.SessionAgent
}
var _ = Suite(&servicesTestSuite{})
func (s *servicesTestSuite) SetUpTest(c *C) {
s.DBusTest.SetUpTest(c)
s.tempdir = c.MkDir()
s.sysdLog = nil
dirs.SetRootDir(s.tempdir)
s.systemctlRestorer = systemd.MockSystemctl(func(cmd ...string) ([]byte, error) {
s.sysdLog = append(s.sysdLog, cmd)
return []byte("ActiveState=inactive\n"), nil
})
s.delaysRestorer = systemd.MockStopDelays(2*time.Millisecond, 4*time.Millisecond)
s.perfTimings = timings.New(nil)
xdgRuntimeDir := fmt.Sprintf("%s/%d", dirs.XdgRuntimeDirBase, os.Getuid())
err := os.MkdirAll(xdgRuntimeDir, 0700)
c.Assert(err, IsNil)
s.agent, err = agent.New()
c.Assert(err, IsNil)
s.agent.Start()
}
func (s *servicesTestSuite) TearDownTest(c *C) {
if s.agent != nil {
err := s.agent.Stop()
c.Check(err, IsNil)
}
s.systemctlRestorer()
s.delaysRestorer()
dirs.SetRootDir("")
s.DBusTest.TearDownTest(c)
}
// addSnapServices adds service units for the applications from the snap which
// are services. The services do not get enabled or started.
func (s *servicesTestSuite) addSnapServices(snapInfo *snap.Info, preseeding bool) error {
m := map[*snap.Info]*wrappers.SnapServiceOptions{
snapInfo: nil,
}
ensureOpts := &wrappers.EnsureSnapServicesOptions{
Preseeding: preseeding,
}
return wrappers.EnsureSnapServices(m, ensureOpts, nil, progress.Null)
}
func (s *servicesTestSuite) TestAddSnapServicesAndRemove(c *C) {
info := snaptest.MockSnap(c, packageHello, &snap.SideInfo{Revision: snap.R(12)})
svcFile := filepath.Join(s.tempdir, "/etc/systemd/system/snap.hello-snap.svc1.service")
err := s.addSnapServices(info, false)
c.Assert(err, IsNil)
c.Check(s.sysdLog, DeepEquals, [][]string{
{"daemon-reload"},
})
s.sysdLog = nil
flags := &wrappers.StartServicesFlags{Enable: true}
err = wrappers.StartServices(info.Services(), nil, flags, progress.Null, s.perfTimings)
c.Assert(err, IsNil)
c.Check(s.sysdLog, DeepEquals, [][]string{
{"--no-reload", "enable", filepath.Base(svcFile)},
{"daemon-reload"},
{"start", filepath.Base(svcFile)},
})
dir := filepath.Join(dirs.SnapMountDir, "hello-snap", "12.mount")
c.Assert(svcFile, testutil.FileEquals, fmt.Sprintf(`[Unit]
# Auto-generated, DO NOT EDIT
Description=Service for snap application hello-snap.svc1
Requires=%[1]s
Wants=network.target
After=%[1]s network.target snapd.apparmor.service
X-Snappy=yes
[Service]
EnvironmentFile=-/etc/environment
ExecStart=/usr/bin/snap run hello-snap.svc1
SyslogIdentifier=hello-snap.svc1
Restart=on-failure
WorkingDirectory=%[2]s/var/snap/hello-snap/12
ExecStop=/usr/bin/snap run --command=stop hello-snap.svc1
ExecStopPost=/usr/bin/snap run --command=post-stop hello-snap.svc1
TimeoutStopSec=30
Type=forking
[Install]
WantedBy=multi-user.target
`,
systemd.EscapeUnitNamePath(dir),
dirs.GlobalRootDir,
))
s.sysdLog = nil
err = wrappers.StopServices(info.Services(), nil, "", progress.Null, s.perfTimings)
c.Assert(err, IsNil)
c.Assert(s.sysdLog, HasLen, 2)
c.Check(s.sysdLog, DeepEquals, [][]string{
{"stop", filepath.Base(svcFile)},
{"show", "--property=ActiveState", "snap.hello-snap.svc1.service"},
})
s.sysdLog = nil
err = wrappers.RemoveSnapServices(info, progress.Null)
c.Assert(err, IsNil)
c.Check(svcFile, testutil.FileAbsent)
c.Assert(s.sysdLog, DeepEquals, [][]string{
{"--no-reload", "disable", filepath.Base(svcFile)},
{"daemon-reload"},
})
}
func (s *servicesTestSuite) TestEnsureSnapServicesAdds(c *C) {
// map unit -> new
seen := make(map[string]bool)
cb := func(app *snap.AppInfo, grp *quota.Group, unitType, name string, old, new string) {
seen[fmt.Sprintf("%s:%s:%s:%s", app.Snap.InstanceName(), app.Name, unitType, name)] = old == ""
}
info := snaptest.MockSnap(c, packageHello, &snap.SideInfo{Revision: snap.R(12)})
svcFile := filepath.Join(s.tempdir, "/etc/systemd/system/snap.hello-snap.svc1.service")
m := map[*snap.Info]*wrappers.SnapServiceOptions{
info: nil,
}
err := wrappers.EnsureSnapServices(m, nil, cb, progress.Null)
c.Assert(err, IsNil)
c.Check(s.sysdLog, DeepEquals, [][]string{
{"daemon-reload"},
})
c.Check(seen, DeepEquals, map[string]bool{
"hello-snap:svc1:service:svc1": true,
})
dir := filepath.Join(dirs.SnapMountDir, "hello-snap", "12.mount")
c.Assert(svcFile, testutil.FileEquals, fmt.Sprintf(`[Unit]
# Auto-generated, DO NOT EDIT
Description=Service for snap application hello-snap.svc1
Requires=%[1]s
Wants=network.target
After=%[1]s network.target snapd.apparmor.service
X-Snappy=yes
[Service]
EnvironmentFile=-/etc/environment
ExecStart=/usr/bin/snap run hello-snap.svc1
SyslogIdentifier=hello-snap.svc1
Restart=on-failure
WorkingDirectory=%[2]s/var/snap/hello-snap/12
ExecStop=/usr/bin/snap run --command=stop hello-snap.svc1
ExecStopPost=/usr/bin/snap run --command=post-stop hello-snap.svc1
TimeoutStopSec=30
Type=forking
[Install]
WantedBy=multi-user.target
`,
systemd.EscapeUnitNamePath(dir),
dirs.GlobalRootDir,
))
}
func (s *servicesTestSuite) TestEnsureSnapServicesWithQuotas(c *C) {
info := snaptest.MockSnap(c, packageHello, &snap.SideInfo{Revision: snap.R(12)})
svcFile := filepath.Join(s.tempdir, "/etc/systemd/system/snap.hello-snap.svc1.service")
// set up arbitrary quotas for the group to test they get written correctly to the slice
resourceLimits := quota.NewResourcesBuilder().
WithMemoryLimit(quantity.SizeGiB).
WithCPUCount(2).
WithCPUPercentage(50).
WithCPUSet([]int{0, 1}).
WithThreadLimit(32).
Build()
grp, err := quota.NewGroup("foogroup", resourceLimits)
c.Assert(err, IsNil)
m := map[*snap.Info]*wrappers.SnapServiceOptions{
info: {QuotaGroup: grp},
}
dir := filepath.Join(dirs.SnapMountDir, "hello-snap", "12.mount")
svcContent := fmt.Sprintf(`[Unit]
# Auto-generated, DO NOT EDIT
Description=Service for snap application hello-snap.svc1
Requires=%[1]s
Wants=network.target
After=%[1]s network.target snapd.apparmor.service
X-Snappy=yes
[Service]
EnvironmentFile=-/etc/environment
ExecStart=/usr/bin/snap run hello-snap.svc1
SyslogIdentifier=hello-snap.svc1
Restart=on-failure
WorkingDirectory=%[2]s/var/snap/hello-snap/12
ExecStop=/usr/bin/snap run --command=stop hello-snap.svc1
ExecStopPost=/usr/bin/snap run --command=post-stop hello-snap.svc1
TimeoutStopSec=30
Type=forking
Slice=snap.foogroup.slice
[Install]
WantedBy=multi-user.target
`,
systemd.EscapeUnitNamePath(dir),
dirs.GlobalRootDir,
)
sliceTempl := `[Unit]
Description=Slice for snap quota group %s
Before=slices.target
X-Snappy=yes
[Slice]
# Always enable cpu accounting, so the following cpu quota options have an effect
CPUAccounting=true
CPUQuota=%[2]d%%
AllowedCPUs=%[3]s
# Always enable memory accounting otherwise the MemoryMax setting does nothing.
MemoryAccounting=true
MemoryMax=%[4]d
# for compatibility with older versions of systemd
MemoryLimit=%[4]d
# Always enable task accounting in order to be able to count the processes/
# threads, etc for a slice
TasksAccounting=true
TasksMax=%[5]d
`
allowedCpusValue := strutil.IntsToCommaSeparated(resourceLimits.CPUSet.CPUs)
sliceContent := fmt.Sprintf(sliceTempl, grp.Name,
resourceLimits.CPU.Count*resourceLimits.CPU.Percentage,
allowedCpusValue,
resourceLimits.Memory.Limit,
resourceLimits.Threads.Limit)
exp := []changesObservation{
{
snapName: "hello-snap",
unitType: "service",
name: "svc1",
old: "",
new: svcContent,
},
{
grp: grp,
unitType: "slice",
new: sliceContent,
old: "",
name: "foogroup",
},
}
r, observe := expChangeObserver(c, exp)
defer r()
err = wrappers.EnsureSnapServices(m, nil, observe, progress.Null)
c.Assert(err, IsNil)
c.Check(s.sysdLog, DeepEquals, [][]string{
{"daemon-reload"},
})
c.Assert(svcFile, testutil.FileEquals, svcContent)
}
func (s *servicesTestSuite) TestEnsureSnapServicesWithZeroCpuCountQuotas(c *C) {
// Kind of a special case, if the cpu count is zero it needs to automatically scale
// at the moment of writing the service file to the current number of cpu cores
info := snaptest.MockSnap(c, packageHello, &snap.SideInfo{Revision: snap.R(12)})
svcFile := filepath.Join(s.tempdir, "/etc/systemd/system/snap.hello-snap.svc1.service")
// set up arbitrary quotas for the group to test they get written correctly to the slice
resourceLimits := quota.NewResourcesBuilder().
WithCPUPercentage(50).
Build()
grp, err := quota.NewGroup("foogroup", resourceLimits)
c.Assert(err, IsNil)
m := map[*snap.Info]*wrappers.SnapServiceOptions{
info: {QuotaGroup: grp},
}
dir := filepath.Join(dirs.SnapMountDir, "hello-snap", "12.mount")
svcContent := fmt.Sprintf(`[Unit]
# Auto-generated, DO NOT EDIT
Description=Service for snap application hello-snap.svc1
Requires=%[1]s
Wants=network.target
After=%[1]s network.target snapd.apparmor.service
X-Snappy=yes
[Service]
EnvironmentFile=-/etc/environment
ExecStart=/usr/bin/snap run hello-snap.svc1
SyslogIdentifier=hello-snap.svc1
Restart=on-failure
WorkingDirectory=%[2]s/var/snap/hello-snap/12
ExecStop=/usr/bin/snap run --command=stop hello-snap.svc1
ExecStopPost=/usr/bin/snap run --command=post-stop hello-snap.svc1
TimeoutStopSec=30
Type=forking
Slice=snap.foogroup.slice
[Install]
WantedBy=multi-user.target
`,
systemd.EscapeUnitNamePath(dir),
dirs.GlobalRootDir,
)
sliceTempl := `[Unit]
Description=Slice for snap quota group %s
Before=slices.target
X-Snappy=yes
[Slice]
# Always enable cpu accounting, so the following cpu quota options have an effect
CPUAccounting=true
CPUQuota=%[2]d%%
# Always enable memory accounting otherwise the MemoryMax setting does nothing.
MemoryAccounting=true
# Always enable task accounting in order to be able to count the processes/
# threads, etc for a slice
TasksAccounting=true
`
// The reason we are not mocking the cpu count here is because we are relying
// on the real code to produce the slice file content, and it will always use
// the current number of cores, so we also use the current number of cores of
// the test runner here.
sliceContent := fmt.Sprintf(sliceTempl, grp.Name,
runtime.NumCPU()*resourceLimits.CPU.Percentage)
exp := []changesObservation{
{
snapName: "hello-snap",
unitType: "service",
name: "svc1",
old: "",
new: svcContent,
},
{
grp: grp,
unitType: "slice",
new: sliceContent,
old: "",
name: "foogroup",
},
}
r, observe := expChangeObserver(c, exp)
defer r()
err = wrappers.EnsureSnapServices(m, nil, observe, progress.Null)
c.Assert(err, IsNil)
c.Check(s.sysdLog, DeepEquals, [][]string{
{"daemon-reload"},
})
c.Assert(svcFile, testutil.FileEquals, svcContent)
}
func (s *servicesTestSuite) TestEnsureSnapServicesWithZeroCpuCountAndCpuSetQuotas(c *C) {
// Another special case, if the cpu count is zero it needs to automatically scale as the
// previous test, but only up the maximum allowed provided in the cpu-set. So in this test
// we provide only 1 allowed CPU, which means that the percentage that will be written is 50%
// and not 200% or how many cores that runs this test!
info := snaptest.MockSnap(c, packageHello, &snap.SideInfo{Revision: snap.R(12)})
svcFile := filepath.Join(s.tempdir, "/etc/systemd/system/snap.hello-snap.svc1.service")
// set up arbitrary quotas for the group to test they get written correctly to the slice
resourceLimits := quota.NewResourcesBuilder().
WithCPUPercentage(50).
WithCPUSet([]int{0}).
Build()
grp, err := quota.NewGroup("foogroup", resourceLimits)
c.Assert(err, IsNil)
m := map[*snap.Info]*wrappers.SnapServiceOptions{
info: {QuotaGroup: grp},
}
dir := filepath.Join(dirs.SnapMountDir, "hello-snap", "12.mount")
svcContent := fmt.Sprintf(`[Unit]
# Auto-generated, DO NOT EDIT
Description=Service for snap application hello-snap.svc1
Requires=%[1]s
Wants=network.target
After=%[1]s network.target snapd.apparmor.service
X-Snappy=yes
[Service]
EnvironmentFile=-/etc/environment
ExecStart=/usr/bin/snap run hello-snap.svc1
SyslogIdentifier=hello-snap.svc1
Restart=on-failure
WorkingDirectory=%[2]s/var/snap/hello-snap/12
ExecStop=/usr/bin/snap run --command=stop hello-snap.svc1
ExecStopPost=/usr/bin/snap run --command=post-stop hello-snap.svc1
TimeoutStopSec=30
Type=forking
Slice=snap.foogroup.slice
[Install]
WantedBy=multi-user.target
`,
systemd.EscapeUnitNamePath(dir),
dirs.GlobalRootDir,
)
sliceTempl := `[Unit]
Description=Slice for snap quota group %s
Before=slices.target
X-Snappy=yes
[Slice]
# Always enable cpu accounting, so the following cpu quota options have an effect
CPUAccounting=true
CPUQuota=50%%
AllowedCPUs=0
# Always enable memory accounting otherwise the MemoryMax setting does nothing.
MemoryAccounting=true
# Always enable task accounting in order to be able to count the processes/
# threads, etc for a slice
TasksAccounting=true
`
sliceContent := fmt.Sprintf(sliceTempl, grp.Name)
exp := []changesObservation{
{
snapName: "hello-snap",
unitType: "service",
name: "svc1",
old: "",
new: svcContent,
},
{
grp: grp,
unitType: "slice",
new: sliceContent,
old: "",
name: "foogroup",
},
}
r, observe := expChangeObserver(c, exp)
defer r()
err = wrappers.EnsureSnapServices(m, nil, observe, progress.Null)
c.Assert(err, IsNil)
c.Check(s.sysdLog, DeepEquals, [][]string{
{"daemon-reload"},
})
c.Assert(svcFile, testutil.FileEquals, svcContent)
}
func (s *servicesTestSuite) TestEnsureSnapServicesWithJournalNamespaceOnly(c *C) {
// Ensure that the journald.conf file is correctly written
info := snaptest.MockSnap(c, packageHello, &snap.SideInfo{Revision: snap.R(12)})
svcFile := filepath.Join(s.tempdir, "/etc/systemd/system/snap.hello-snap.svc1.service")
// set up arbitrary quotas for the group to test they get written correctly to the slice
resourceLimits := quota.NewResourcesBuilder().
WithJournalNamespace().
Build()
grp, err := quota.NewGroup("foogroup", resourceLimits)
c.Assert(err, IsNil)
m := map[*snap.Info]*wrappers.SnapServiceOptions{
info: {QuotaGroup: grp},
}
dir := filepath.Join(dirs.SnapMountDir, "hello-snap", "12.mount")
svcContent := fmt.Sprintf(`[Unit]
# Auto-generated, DO NOT EDIT
Description=Service for snap application hello-snap.svc1
Requires=%[1]s
Wants=network.target
After=%[1]s network.target snapd.apparmor.service
X-Snappy=yes
[Service]
EnvironmentFile=-/etc/environment
ExecStart=/usr/bin/snap run hello-snap.svc1
SyslogIdentifier=hello-snap.svc1
Restart=on-failure
WorkingDirectory=%[2]s/var/snap/hello-snap/12
ExecStop=/usr/bin/snap run --command=stop hello-snap.svc1
ExecStopPost=/usr/bin/snap run --command=post-stop hello-snap.svc1
TimeoutStopSec=30
Type=forking
Slice=snap.foogroup.slice
LogNamespace=snap-foogroup
[Install]
WantedBy=multi-user.target
`,
systemd.EscapeUnitNamePath(dir),
dirs.GlobalRootDir,
)
jconfTempl := `# Journald configuration for snap quota group %s
[Journal]
Storage=auto
`
jSvcContent := `[Service]
LogsDirectory=
`
sliceTempl := `[Unit]
Description=Slice for snap quota group %s
Before=slices.target
X-Snappy=yes
[Slice]
# Always enable cpu accounting, so the following cpu quota options have an effect
CPUAccounting=true
# Always enable memory accounting otherwise the MemoryMax setting does nothing.
MemoryAccounting=true
# Always enable task accounting in order to be able to count the processes/
# threads, etc for a slice
TasksAccounting=true
`
jconfContent := fmt.Sprintf(jconfTempl, grp.Name)
sliceContent := fmt.Sprintf(sliceTempl, grp.Name)
exp := []changesObservation{
{
grp: grp,
unitType: "journald",
new: jconfContent,
old: "",
name: "foogroup",
},
{
grp: grp,
unitType: "service",
new: jSvcContent,
old: "",
name: "foogroup",
},
{
snapName: "hello-snap",
unitType: "service",
name: "svc1",
old: "",
new: svcContent,
},
{
grp: grp,
unitType: "slice",
new: sliceContent,
old: "",
name: "foogroup",
},
}
r, observe := expChangeObserver(c, exp)
defer r()
err = wrappers.EnsureSnapServices(m, nil, observe, progress.Null)
c.Assert(err, IsNil)
c.Check(s.sysdLog, DeepEquals, [][]string{
{"daemon-reload"},
})
c.Assert(svcFile, testutil.FileEquals, svcContent)
}
func (s *servicesTestSuite) TestEnsureSnapServicesWithJournalQuotas(c *C) {
// Ensure that the journald.conf file is correctly written
info := snaptest.MockSnap(c, packageHello, &snap.SideInfo{Revision: snap.R(12)})
svcFile := filepath.Join(s.tempdir, "/etc/systemd/system/snap.hello-snap.svc1.service")
// set up arbitrary quotas for the group to test they get written correctly to the slice
resourceLimits := quota.NewResourcesBuilder().
WithJournalSize(10*quantity.SizeMiB).
WithJournalRate(15, 5*time.Second).
Build()
grp, err := quota.NewGroup("foogroup", resourceLimits)
c.Assert(err, IsNil)
m := map[*snap.Info]*wrappers.SnapServiceOptions{
info: {QuotaGroup: grp},
}
dir := filepath.Join(dirs.SnapMountDir, "hello-snap", "12.mount")
svcContent := fmt.Sprintf(`[Unit]
# Auto-generated, DO NOT EDIT
Description=Service for snap application hello-snap.svc1
Requires=%[1]s
Wants=network.target
After=%[1]s network.target snapd.apparmor.service
X-Snappy=yes
[Service]
EnvironmentFile=-/etc/environment
ExecStart=/usr/bin/snap run hello-snap.svc1
SyslogIdentifier=hello-snap.svc1
Restart=on-failure
WorkingDirectory=%[2]s/var/snap/hello-snap/12
ExecStop=/usr/bin/snap run --command=stop hello-snap.svc1
ExecStopPost=/usr/bin/snap run --command=post-stop hello-snap.svc1
TimeoutStopSec=30
Type=forking
Slice=snap.foogroup.slice
LogNamespace=snap-foogroup
[Install]
WantedBy=multi-user.target
`,
systemd.EscapeUnitNamePath(dir),
dirs.GlobalRootDir,
)
jconfTempl := `# Journald configuration for snap quota group %s
[Journal]
Storage=auto
SystemMaxUse=10485760
RuntimeMaxUse=10485760
RateLimitIntervalSec=5000000us
RateLimitBurst=15
`
jSvcContent := `[Service]
LogsDirectory=
`
sliceTempl := `[Unit]
Description=Slice for snap quota group %s
Before=slices.target
X-Snappy=yes
[Slice]
# Always enable cpu accounting, so the following cpu quota options have an effect
CPUAccounting=true
# Always enable memory accounting otherwise the MemoryMax setting does nothing.
MemoryAccounting=true
# Always enable task accounting in order to be able to count the processes/
# threads, etc for a slice
TasksAccounting=true
`
jconfContent := fmt.Sprintf(jconfTempl, grp.Name)
sliceContent := fmt.Sprintf(sliceTempl, grp.Name)
exp := []changesObservation{
{
grp: grp,
unitType: "journald",
new: jconfContent,
old: "",
name: "foogroup",
},
{
grp: grp,
unitType: "service",
new: jSvcContent,
old: "",
name: "foogroup",
},
{
snapName: "hello-snap",
unitType: "service",
name: "svc1",
old: "",
new: svcContent,
},
{
grp: grp,
unitType: "slice",
new: sliceContent,
old: "",
name: "foogroup",
},
}
r, observe := expChangeObserver(c, exp)
defer r()
err = wrappers.EnsureSnapServices(m, nil, observe, progress.Null)
c.Assert(err, IsNil)
c.Check(s.sysdLog, DeepEquals, [][]string{
{"daemon-reload"},
})
c.Assert(svcFile, testutil.FileEquals, svcContent)
}
func (s *servicesTestSuite) TestEnsureSnapServicesWithJournalQuotaRateAsZero(c *C) {
// Ensure that the journald.conf file is correctly written
info := snaptest.MockSnap(c, packageHello, &snap.SideInfo{Revision: snap.R(12)})
svcFile := filepath.Join(s.tempdir, "/etc/systemd/system/snap.hello-snap.svc1.service")
// set up arbitrary quotas for the group to test they get written correctly to the slice
resourceLimits := quota.NewResourcesBuilder().
WithJournalRate(0, 0).
Build()
grp, err := quota.NewGroup("foogroup", resourceLimits)
c.Assert(err, IsNil)
m := map[*snap.Info]*wrappers.SnapServiceOptions{
info: {QuotaGroup: grp},
}
dir := filepath.Join(dirs.SnapMountDir, "hello-snap", "12.mount")
svcContent := fmt.Sprintf(`[Unit]
# Auto-generated, DO NOT EDIT
Description=Service for snap application hello-snap.svc1
Requires=%[1]s
Wants=network.target
After=%[1]s network.target snapd.apparmor.service
X-Snappy=yes
[Service]
EnvironmentFile=-/etc/environment
ExecStart=/usr/bin/snap run hello-snap.svc1
SyslogIdentifier=hello-snap.svc1
Restart=on-failure
WorkingDirectory=%[2]s/var/snap/hello-snap/12
ExecStop=/usr/bin/snap run --command=stop hello-snap.svc1
ExecStopPost=/usr/bin/snap run --command=post-stop hello-snap.svc1
TimeoutStopSec=30
Type=forking
Slice=snap.foogroup.slice
LogNamespace=snap-foogroup
[Install]
WantedBy=multi-user.target
`,
systemd.EscapeUnitNamePath(dir),
dirs.GlobalRootDir,
)
jconfTempl := `# Journald configuration for snap quota group %s
[Journal]
Storage=auto
RateLimitIntervalSec=0us
RateLimitBurst=0
`
jSvcContent := `[Service]
LogsDirectory=
`
sliceTempl := `[Unit]
Description=Slice for snap quota group %s
Before=slices.target
X-Snappy=yes
[Slice]
# Always enable cpu accounting, so the following cpu quota options have an effect
CPUAccounting=true
# Always enable memory accounting otherwise the MemoryMax setting does nothing.
MemoryAccounting=true
# Always enable task accounting in order to be able to count the processes/
# threads, etc for a slice
TasksAccounting=true
`
jconfContent := fmt.Sprintf(jconfTempl, grp.Name)
sliceContent := fmt.Sprintf(sliceTempl, grp.Name)
exp := []changesObservation{
{
grp: grp,
unitType: "journald",
new: jconfContent,
old: "",
name: "foogroup",
},
{
grp: grp,
unitType: "service",
new: jSvcContent,
old: "",
name: "foogroup",
},
{
snapName: "hello-snap",
unitType: "service",
name: "svc1",
old: "",
new: svcContent,
},
{
grp: grp,
unitType: "slice",
new: sliceContent,
old: "",
name: "foogroup",
},
}
r, observe := expChangeObserver(c, exp)
defer r()
err = wrappers.EnsureSnapServices(m, nil, observe, progress.Null)
c.Assert(err, IsNil)
c.Check(s.sysdLog, DeepEquals, [][]string{
{"daemon-reload"},
})
c.Assert(svcFile, testutil.FileEquals, svcContent)
}
const testSnapServicesYaml = `name: hello-snap
version: 1
apps:
svc1:
command: bin/hello
daemon: simple
svc2:
command: bin/world
daemon: simple
`
func (s *servicesTestSuite) TestEnsureSnapServicesWithSnapServices(c *C) {
// Test ensures that if a snap has services in a sub-group, the sub-group
// slice is correctly applied to the service unit for the snap service. We should
// see two slices created (one for root group which has the snap, and one for the
// sub-group which has the service).
// Furthermore we should see the service unit file for hello-snap.svc2 refer to the
// sub-group slice, and not the slice for the primary group.
info := snaptest.MockSnap(c, testSnapServicesYaml, &snap.SideInfo{Revision: snap.R(12)})
svc1File := filepath.Join(s.tempdir, "/etc/systemd/system/snap.hello-snap.svc1.service")
svc2File := filepath.Join(s.tempdir, "/etc/systemd/system/snap.hello-snap.svc2.service")
// setup quotas for the parent, including a journal quota to verify service sub-groups
// correctly inherit the journal namespace, even without having one directly specified.
grp, err := quota.NewGroup("my-root", quota.NewResourcesBuilder().
WithMemoryLimit(quantity.SizeGiB).
WithJournalNamespace().
WithCPUPercentage(50).
WithCPUCount(1).
Build())
c.Assert(err, IsNil)
grp.Snaps = []string{"hello-snap"}
// setup basic quota for the service sub-group
sub, err := grp.NewSubGroup("my-sub", quota.NewResourcesBuilder().
WithMemoryLimit(quantity.SizeGiB/2).
Build())
c.Assert(err, IsNil)
sub.Services = []string{"hello-snap.svc2"}
m := map[*snap.Info]*wrappers.SnapServiceOptions{
info: {QuotaGroup: grp},
}
dir := filepath.Join(dirs.SnapMountDir, "hello-snap", "12.mount")
svc1Content := fmt.Sprintf(`[Unit]
# Auto-generated, DO NOT EDIT
Description=Service for snap application hello-snap.svc1
Requires=%[1]s
Wants=network.target
After=%[1]s network.target snapd.apparmor.service
X-Snappy=yes
[Service]
EnvironmentFile=-/etc/environment
ExecStart=/usr/bin/snap run hello-snap.svc1
SyslogIdentifier=hello-snap.svc1
Restart=on-failure
WorkingDirectory=%[2]s/var/snap/hello-snap/12
TimeoutStopSec=30
Type=simple
Slice=snap.%[3]s.slice
LogNamespace=snap-my-root
[Install]
WantedBy=multi-user.target
`,
systemd.EscapeUnitNamePath(dir),
dirs.GlobalRootDir,
systemd.EscapeUnitNamePath("my-root"),
)
svc2Content := fmt.Sprintf(`[Unit]
# Auto-generated, DO NOT EDIT
Description=Service for snap application hello-snap.svc2
Requires=%[1]s
Wants=network.target
After=%[1]s network.target snapd.apparmor.service
X-Snappy=yes
[Service]
EnvironmentFile=-/etc/environment
ExecStart=/usr/bin/snap run hello-snap.svc2
SyslogIdentifier=hello-snap.svc2
Restart=on-failure
WorkingDirectory=%[2]s/var/snap/hello-snap/12
TimeoutStopSec=30
Type=simple
Slice=snap.%[3]s.slice
LogNamespace=snap-my-root
[Install]
WantedBy=multi-user.target
`,
systemd.EscapeUnitNamePath(dir),
dirs.GlobalRootDir,
systemd.EscapeUnitNamePath("my-root")+"-"+systemd.EscapeUnitNamePath("my-sub"),
)
jSvcContent := `[Service]
LogsDirectory=
`
rootSliceTempl := `[Unit]
Description=Slice for snap quota group %s
Before=slices.target
X-Snappy=yes
[Slice]
# Always enable cpu accounting, so the following cpu quota options have an effect
CPUAccounting=true
CPUQuota=50%%
# Always enable memory accounting otherwise the MemoryMax setting does nothing.
MemoryAccounting=true
MemoryMax=1073741824
# for compatibility with older versions of systemd
MemoryLimit=1073741824
# Always enable task accounting in order to be able to count the processes/
# threads, etc for a slice
TasksAccounting=true
`