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cloudinit_test.go
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// -*- Mode: Go; indent-tabs-mode: t -*-
/*
* Copyright (C) 2020, 2024 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 sysconfig_test
import (
"fmt"
"os"
"path/filepath"
"testing"
. "gopkg.in/check.v1"
"github.com/snapcore/snapd/dirs"
"github.com/snapcore/snapd/logger"
"github.com/snapcore/snapd/osutil/kcmdline"
"github.com/snapcore/snapd/sysconfig"
"github.com/snapcore/snapd/testutil"
)
// Hook up check.v1 into the "go test" runner
func Test(t *testing.T) { TestingT(t) }
type sysconfigSuite struct {
testutil.BaseTest
tmpdir string
}
var _ = Suite(&sysconfigSuite{})
func (s *sysconfigSuite) SetUpTest(c *C) {
s.BaseTest.SetUpTest(c)
s.tmpdir = c.MkDir()
dirs.SetRootDir(s.tmpdir)
s.AddCleanup(func() { dirs.SetRootDir("/") })
oldTmpdir := os.Getenv("TMPDIR")
os.Setenv("TMPDIR", s.tmpdir)
s.AddCleanup(func() { os.Unsetenv(oldTmpdir) })
err := os.MkdirAll(filepath.Join(s.tmpdir, "proc"), 0755)
c.Assert(err, IsNil)
restore := kcmdline.MockProcCmdline(filepath.Join(s.tmpdir, "proc/cmdline"))
s.AddCleanup(restore)
}
func (s *sysconfigSuite) makeCloudCfgSrcDirFiles(c *C, cfgs ...string) (string, []string) {
cloudCfgSrcDir := c.MkDir()
names := make([]string, 0, len(cfgs))
for i, mockCfg := range cfgs {
configFileName := fmt.Sprintf("seed-config-%d.cfg", i)
err := os.WriteFile(filepath.Join(cloudCfgSrcDir, configFileName), []byte(mockCfg), 0644)
c.Assert(err, IsNil)
names = append(names, configFileName)
}
return cloudCfgSrcDir, names
}
func (s *sysconfigSuite) makeGadgetCloudConfFile(c *C, content string) string {
gadgetDir := c.MkDir()
gadgetCloudConf := filepath.Join(gadgetDir, "cloud.conf")
if content == "" {
content = "#cloud-config some gadget cloud config"
}
err := os.WriteFile(gadgetCloudConf, []byte(content), 0644)
c.Assert(err, IsNil)
return gadgetDir
}
func (s *sysconfigSuite) TestHasGadgetCloudConf(c *C) {
// no cloud.conf is false
c.Assert(sysconfig.HasGadgetCloudConf("non-existent-dir-place"), Equals, false)
// the dir is not enough
gadgetDir := c.MkDir()
c.Assert(sysconfig.HasGadgetCloudConf(gadgetDir), Equals, false)
// creating one now is true
gadgetCloudConf := filepath.Join(gadgetDir, "cloud.conf")
err := os.WriteFile(gadgetCloudConf, []byte("gadget cloud config"), 0644)
c.Assert(err, IsNil)
c.Assert(sysconfig.HasGadgetCloudConf(gadgetDir), Equals, true)
}
// this test is for initramfs calls that disable cloud-init for the ephemeral
// writable partition that is used while running during install or recover mode
func (s *sysconfigSuite) TestEphemeralModeInitramfsCloudInitDisables(c *C) {
writableDefaultsDir := sysconfig.WritableDefaultsDir(filepath.Join(dirs.GlobalRootDir, "/run/mnt/data/system-data"))
err := sysconfig.DisableCloudInit(writableDefaultsDir)
c.Assert(err, IsNil)
ubuntuDataCloudDisabled := filepath.Join(filepath.Join(dirs.GlobalRootDir, "/run/mnt/data/system-data"), "_writable_defaults/etc/cloud/cloud-init.disabled")
c.Check(ubuntuDataCloudDisabled, testutil.FilePresent)
}
func (s *sysconfigSuite) TestInstallModeCloudInitDisablesByDefaultRunMode(c *C) {
err := sysconfig.ConfigureTargetSystem(fake20Model("signed"), &sysconfig.Options{
TargetRootDir: filepath.Join(dirs.GlobalRootDir, "/run/mnt/ubuntu-data/system-data"),
})
c.Assert(err, IsNil)
ubuntuDataCloudDisabled := filepath.Join(filepath.Join(dirs.GlobalRootDir, "/run/mnt/ubuntu-data/system-data"), "_writable_defaults/etc/cloud/cloud-init.disabled")
c.Check(ubuntuDataCloudDisabled, testutil.FilePresent)
}
func (s *sysconfigSuite) TestInstallModeCloudInitDisallowedIgnoresOtherOptions(c *C) {
cloudCfgSrcDir, _ := s.makeCloudCfgSrcDirFiles(c)
gadgetDir := s.makeGadgetCloudConfFile(c, "")
err := sysconfig.ConfigureTargetSystem(fake20Model("signed"), &sysconfig.Options{
AllowCloudInit: false,
CloudInitSrcDir: cloudCfgSrcDir,
GadgetDir: gadgetDir,
TargetRootDir: filepath.Join(dirs.GlobalRootDir, "/run/mnt/ubuntu-data/system-data"),
})
c.Assert(err, IsNil)
ubuntuDataCloudDisabled := filepath.Join(filepath.Join(dirs.GlobalRootDir, "/run/mnt/ubuntu-data/system-data"), "_writable_defaults/etc/cloud/cloud-init.disabled")
c.Check(ubuntuDataCloudDisabled, testutil.FilePresent)
// did not copy ubuntu-seed src files
ubuntuDataCloudCfg := filepath.Join(filepath.Join(dirs.GlobalRootDir, "/run/mnt/ubuntu-data/system-data"), "_writable_defaults/etc/cloud/cloud.cfg.d/")
c.Check(filepath.Join(ubuntuDataCloudCfg, "foo.cfg"), testutil.FileAbsent)
c.Check(filepath.Join(ubuntuDataCloudCfg, "bar.cfg"), testutil.FileAbsent)
// also did not copy gadget cloud.conf
c.Check(filepath.Join(ubuntuDataCloudCfg, "80_device_gadget.cfg"), testutil.FileAbsent)
}
func (s *sysconfigSuite) TestInstallModeCloudInitAllowedPermutations(c *C) {
// common inputs in the test cases below
defaultMAASCfgs := []string{
maasCfg1, // MAAS specific config
maasCfg2, // MAAS specific config - this sets the datasource_list
maasCfg3, // generic config that's filtered out
maasCfg4, // generic config that passes filtering
maasCfg5, // MAAS specific config
}
defaultMAASHappyInstalled := []bool{
true,
true,
false,
true,
true,
}
defaultMAASNoneInstalled := []bool{false, false, false, false, false}
explicitNonSupportedDatasource := `datasource_list: [GCE]`
explicitSupportedDatasource := maasCfg2
explicitNoDatasourceAllowed := `datasource_list: []`
explicitSupportedAndNonSupportedDatasources := `datasource_list: [GCE, MAAS]`
implictMentionNonSupportedDatasource := `#cloud-config
datasource:
gce:
metadata_url: foo
`
implicitMentionSupportedDatasource := maasCfg1
restrictDatasourceMAASFile := `datasource_list: [MAAS]
`
// restrictDatasourceNoneFile := `datasource_list: []
// `
tt := []struct {
grade string
gadgetCfg string
// use lists here to install the files in the order that the file
// content appears
seedCfgs []string
// whether each file in seedCfgs gets installed
resultCfgCopied []bool
expDsRestrictFileContents string
comment string
}{
{
comment: "no config anywhere, but cloud-init not disabled",
},
{
grade: "dangerous",
comment: "grade dangerous, no config anywhere, but cloud-init not disabled",
},
{
comment: "no gadget config but MAAS allowed",
seedCfgs: defaultMAASCfgs,
resultCfgCopied: defaultMAASHappyInstalled,
expDsRestrictFileContents: restrictDatasourceMAASFile,
},
{
comment: "grade signed NoCloud not allowed",
seedCfgs: []string{
`#cloud-config
datasource:
NoCloud:
something-no-cloudy: foo
`,
},
resultCfgCopied: []bool{false},
},
{
comment: "MAAS in seed and gadget explicit gets installed",
seedCfgs: defaultMAASCfgs,
resultCfgCopied: defaultMAASHappyInstalled,
gadgetCfg: explicitSupportedDatasource,
expDsRestrictFileContents: restrictDatasourceMAASFile,
},
{
comment: "MAAS in seed and gadget implicit gets installed",
seedCfgs: defaultMAASCfgs,
resultCfgCopied: defaultMAASHappyInstalled,
gadgetCfg: implicitMentionSupportedDatasource,
expDsRestrictFileContents: restrictDatasourceMAASFile,
},
{
comment: "MAAS in seed not installed due to implicit unsupported datasource in gadget",
seedCfgs: defaultMAASCfgs,
resultCfgCopied: defaultMAASNoneInstalled,
gadgetCfg: implictMentionNonSupportedDatasource,
},
{
comment: "MAAS in seed not installed due to gadget disallowing any datasource",
seedCfgs: defaultMAASCfgs,
resultCfgCopied: defaultMAASNoneInstalled,
gadgetCfg: explicitNoDatasourceAllowed,
},
{
comment: "MAAS in seed not installed due to gadget explicitly allowing other datasource",
seedCfgs: defaultMAASCfgs,
resultCfgCopied: defaultMAASNoneInstalled,
gadgetCfg: explicitNonSupportedDatasource,
},
{
comment: "MAAS in seed not installed due to seed config disallowing itself with gadget",
seedCfgs: []string{
maasCfg1, // MAAS specific config
maasCfg2, // MAAS specific config - this sets the datasource_list
maasCfg3, // generic config that's filtered out
maasCfg4, // generic config that passes filtering
maasCfg5, // MAAS specific config
explicitNoDatasourceAllowed, // extra that disables all datasources
},
resultCfgCopied: []bool{false, false, false, false, false, false},
gadgetCfg: explicitNonSupportedDatasource,
},
{
comment: "MAAS in seed not installed due to seed config disallowing itself without gadget",
seedCfgs: []string{
maasCfg1, // MAAS specific config
maasCfg2, // MAAS specific config - this sets the datasource_list
maasCfg3, // generic config that's filtered out
maasCfg4, // generic config that passes filtering
maasCfg5, // MAAS specific config
explicitNoDatasourceAllowed, // extra that disables all datasources
},
resultCfgCopied: []bool{false, false, false, false, false, false},
},
{
comment: "implictly mentioned datasource in seed not installed because it's unsupported",
seedCfgs: []string{
maasCfg1, // MAAS specific config
maasCfg2, // MAAS specific config - this sets the datasource_list
maasCfg4, // generic config that passes filtering
maasCfg5, // MAAS specific config
implictMentionNonSupportedDatasource, // extra that implicitly mentions GCE
},
resultCfgCopied: []bool{
true,
true,
true,
true,
false, // the implicit GCE one
},
expDsRestrictFileContents: restrictDatasourceMAASFile,
},
{
comment: "implictly mentioned datasource in seed not installed because it's unsupported + gadget with explicit supported",
seedCfgs: []string{
maasCfg1, // MAAS specific config
maasCfg2, // MAAS specific config - this sets the datasource_list
maasCfg4, // generic config that passes filtering
maasCfg5, // MAAS specific config
implictMentionNonSupportedDatasource, // extra that implicitly mentions GCE
},
resultCfgCopied: []bool{
true,
true,
true,
true,
false, // the implicit GCE one
},
gadgetCfg: explicitSupportedDatasource,
expDsRestrictFileContents: restrictDatasourceMAASFile,
},
{
comment: "implicit mentioned datasource in seed not installed because it's unsupported + gadget with explicit supported and non-supported",
seedCfgs: []string{
maasCfg1, // MAAS specific config
maasCfg2, // MAAS specific config - this sets the datasource_list
maasCfg4, // generic config that passes filtering
maasCfg5, // MAAS specific config
implictMentionNonSupportedDatasource, // extra that implicitly mentions GCE
},
resultCfgCopied: []bool{
true,
true,
true,
true,
false, // the implicit GCE one
},
gadgetCfg: explicitSupportedAndNonSupportedDatasources,
expDsRestrictFileContents: restrictDatasourceMAASFile,
},
{
comment: "implicit mentioned datasource and supported datasource in seed all not installed because no supported datasource in intersection with gadget with implicit non-supported",
seedCfgs: []string{
maasCfg1, // MAAS specific config
maasCfg2, // MAAS specific config - this sets the datasource_list
maasCfg4, // generic config that passes filtering
maasCfg5, // MAAS specific config
implictMentionNonSupportedDatasource, // extra that implicitly mentions GCE
},
resultCfgCopied: []bool{
false,
false,
false,
false,
false, // the implicit GCE one
},
gadgetCfg: implictMentionNonSupportedDatasource,
},
{
comment: "implicit mentioned datasource and supported datasource in seed all not installed because no supported datasource in intersection with gadget with explicit non-supported",
seedCfgs: []string{
maasCfg1, // MAAS specific config
maasCfg2, // MAAS specific config - this sets the datasource_list
maasCfg4, // generic config that passes filtering
maasCfg5, // MAAS specific config
implictMentionNonSupportedDatasource, // extra that implicitly mentions GCE
},
resultCfgCopied: []bool{
false,
false,
false,
false,
false, // the implicit GCE one
},
gadgetCfg: explicitNonSupportedDatasource,
},
{
comment: "implicit mentioned datasource and supported datasource in seed all not installed because no supported datasource in intersection with gadget with implicit non-supported",
seedCfgs: []string{
maasCfg1, // MAAS specific config
maasCfg4, // generic config that passes filtering
maasCfg5, // MAAS specific config
implictMentionNonSupportedDatasource, // extra that implicitly mentions GCE
},
resultCfgCopied: []bool{
false,
false,
false, // the implicit GCE one
false,
},
gadgetCfg: implictMentionNonSupportedDatasource,
},
{
comment: "implicit mentioned datasource in seed not installed and supported datasource in seed installed due to intersection with gadget with implicit supported",
seedCfgs: []string{
maasCfg1, // MAAS specific config
maasCfg4, // generic config that passes filtering
maasCfg5, // MAAS specific config
implictMentionNonSupportedDatasource, // extra that implicitly mentions GCE
},
resultCfgCopied: []bool{
true,
true,
true,
false, // the implicit GCE one
},
gadgetCfg: explicitSupportedAndNonSupportedDatasources,
expDsRestrictFileContents: restrictDatasourceMAASFile,
},
{
comment: "entirely filtered out seed config not installed",
seedCfgs: []string{maasCfg3},
resultCfgCopied: []bool{false},
},
{
comment: "entirely filtered out seed config not installed + gadget with explicit supported datasource",
seedCfgs: []string{maasCfg3},
resultCfgCopied: []bool{false},
gadgetCfg: explicitSupportedDatasource,
},
{
comment: "implicitly mentioned supported datasource in gadget + explicit no datasource in seed",
seedCfgs: []string{
explicitNoDatasourceAllowed,
},
resultCfgCopied: []bool{false},
gadgetCfg: implicitMentionSupportedDatasource,
},
{
comment: "MAAS and GCE in seed gets installed in dangerous",
grade: "dangerous",
seedCfgs: []string{
maasCfg1,
maasCfg2,
maasCfg3,
maasCfg4,
maasCfg5,
implictMentionNonSupportedDatasource,
},
resultCfgCopied: []bool{true, true, true, true, true, true},
},
{
comment: "MAAS and GCE in seed gets installed in dangerous with gadget MAAS",
grade: "dangerous",
seedCfgs: []string{
maasCfg1,
maasCfg2,
maasCfg3,
maasCfg4,
maasCfg5,
implictMentionNonSupportedDatasource,
},
gadgetCfg: implicitMentionSupportedDatasource,
resultCfgCopied: []bool{true, true, true, true, true, true},
},
}
for _, t := range tt {
comment := Commentf(t.comment)
var seedSrcNames []string
var cloudCfgSrcDir string
c.Assert(t.seedCfgs, HasLen, len(t.resultCfgCopied), comment)
if len(t.seedCfgs) != 0 {
cloudCfgSrcDir, seedSrcNames = s.makeCloudCfgSrcDirFiles(c, t.seedCfgs...)
}
var gadgetDir string
if t.gadgetCfg != "" {
gadgetDir = s.makeGadgetCloudConfFile(c, t.gadgetCfg)
}
if t.grade == "" {
t.grade = "signed"
}
err := sysconfig.ConfigureTargetSystem(fake20Model(t.grade), &sysconfig.Options{
AllowCloudInit: true,
TargetRootDir: filepath.Join(dirs.GlobalRootDir, "/run/mnt/ubuntu-data/system-data"),
CloudInitSrcDir: cloudCfgSrcDir,
GadgetDir: gadgetDir,
})
c.Assert(err, IsNil, comment)
ubuntuDataCloudCfg := filepath.Join(filepath.Join(dirs.GlobalRootDir, "/run/mnt/ubuntu-data/system-data"), "_writable_defaults/etc/cloud/cloud.cfg.d/")
for i, name := range seedSrcNames {
if t.resultCfgCopied[i] {
c.Check(filepath.Join(ubuntuDataCloudCfg, "90_"+name), testutil.FilePresent, comment)
} else {
c.Check(filepath.Join(ubuntuDataCloudCfg, "90_"+name), testutil.FileAbsent, comment)
}
}
if t.gadgetCfg != "" {
ubuntuDataCloudCfg := filepath.Join(filepath.Join(dirs.GlobalRootDir, "/run/mnt/ubuntu-data/system-data"), "_writable_defaults/etc/cloud/cloud.cfg.d/")
c.Check(filepath.Join(ubuntuDataCloudCfg, "80_device_gadget.cfg"), testutil.FileEquals, t.gadgetCfg)
}
// check the restrict file we should have installed in some cases too
restrictFile := filepath.Join(ubuntuDataCloudCfg, "99_snapd_datasource.cfg")
if t.expDsRestrictFileContents != "" {
c.Check(restrictFile, testutil.FileEquals, t.expDsRestrictFileContents, comment)
} else {
c.Check(restrictFile, testutil.FileAbsent, comment)
}
// make sure the disabled file is absent
ubuntuDataCloudDisabled := filepath.Join(filepath.Join(dirs.GlobalRootDir, "/run/mnt/ubuntu-data/system-data"), "_writable_defaults/etc/cloud/cloud-init.disabled")
c.Check(ubuntuDataCloudDisabled, testutil.FileAbsent)
// need to clear this dir each time as it doesn't change for each
// iteration
c.Assert(os.RemoveAll(filepath.Join(dirs.GlobalRootDir, "/run/mnt/ubuntu-data/system-data")), IsNil)
}
}
func (s *sysconfigSuite) TestInstallModeCloudInitDisallowedGradeSecuredDoesDisable(c *C) {
err := sysconfig.ConfigureTargetSystem(fake20Model("secured"), &sysconfig.Options{
AllowCloudInit: false,
TargetRootDir: filepath.Join(dirs.GlobalRootDir, "/run/mnt/ubuntu-data/system-data"),
})
c.Assert(err, IsNil)
ubuntuDataCloudDisabled := filepath.Join(filepath.Join(dirs.GlobalRootDir, "/run/mnt/ubuntu-data/system-data"), "_writable_defaults/etc/cloud/cloud-init.disabled")
c.Check(ubuntuDataCloudDisabled, testutil.FilePresent)
}
func (s *sysconfigSuite) TestInstallModeCloudInitAllowedGradeSecuredIgnoresSrcButDoesNotDisable(c *C) {
cloudCfgSrcDir, _ := s.makeCloudCfgSrcDirFiles(c)
err := sysconfig.ConfigureTargetSystem(fake20Model("secured"), &sysconfig.Options{
AllowCloudInit: true,
CloudInitSrcDir: cloudCfgSrcDir,
TargetRootDir: filepath.Join(dirs.GlobalRootDir, "/run/mnt/ubuntu-data/system-data"),
})
c.Assert(err, IsNil)
// the disable file is not present
ubuntuDataCloudDisabled := filepath.Join(filepath.Join(dirs.GlobalRootDir, "/run/mnt/ubuntu-data/system-data"), "_writable_defaults/etc/cloud/cloud-init.disabled")
c.Check(ubuntuDataCloudDisabled, testutil.FileAbsent)
// but we did not copy the config files from ubuntu-seed, even though they
// are there and cloud-init is not disabled
ubuntuDataCloudCfg := filepath.Join(filepath.Join(dirs.GlobalRootDir, "/run/mnt/ubuntu-data/system-data"), "_writable_defaults/etc/cloud/cloud.cfg.d/")
c.Check(filepath.Join(ubuntuDataCloudCfg, "foo.cfg"), testutil.FileAbsent)
c.Check(filepath.Join(ubuntuDataCloudCfg, "bar.cfg"), testutil.FileAbsent)
}
// this test is the same as the logic from install mode devicestate, where we
// want to install cloud-init configuration not onto the running, ephemeral
// writable, but rather the host writable partition that will be used upon
// reboot into run mode
func (s *sysconfigSuite) TestInstallModeCloudInitInstallsOntoHostRunMode(c *C) {
cloudCfgSrcDir, cfgFileNames := s.makeCloudCfgSrcDirFiles(c, "#cloud-config foo", "#cloud-config bar")
err := sysconfig.ConfigureTargetSystem(fake20Model("dangerous"), &sysconfig.Options{
AllowCloudInit: true,
CloudInitSrcDir: cloudCfgSrcDir,
TargetRootDir: filepath.Join(dirs.GlobalRootDir, "/run/mnt/ubuntu-data/system-data"),
})
c.Assert(err, IsNil)
// and did copy the cloud-init files
ubuntuDataCloudCfg := filepath.Join(filepath.Join(dirs.GlobalRootDir, "/run/mnt/ubuntu-data/system-data"), "_writable_defaults/etc/cloud/cloud.cfg.d/")
c.Check(filepath.Join(ubuntuDataCloudCfg, "90_"+cfgFileNames[0]), testutil.FileEquals, "#cloud-config foo")
c.Check(filepath.Join(ubuntuDataCloudCfg, "90_"+cfgFileNames[1]), testutil.FileEquals, "#cloud-config bar")
}
func (s *sysconfigSuite) TestCloudInitStatusUnhappy(c *C) {
cmd := testutil.MockCommand(c, "cloud-init", `
echo cloud-init borken
exit 1
`)
status, err := sysconfig.CloudInitStatus()
c.Assert(err, ErrorMatches, "cloud-init borken")
c.Assert(status, Equals, sysconfig.CloudInitErrored)
c.Assert(cmd.Calls(), DeepEquals, [][]string{
{"cloud-init", "status"},
})
}
func (s *sysconfigSuite) TestCloudInitStatus(c *C) {
tt := []struct {
comment string
cloudInitOutput string
exitCode int
exp sysconfig.CloudInitState
restrictedFile bool
disabledFile bool
disabledKernel bool
expError string
expectedLog string
}{
{
comment: "done",
cloudInitOutput: "status: done",
exp: sysconfig.CloudInitDone,
},
{
comment: "done",
cloudInitOutput: "status: done",
exp: sysconfig.CloudInitDone,
exitCode: 2,
expectedLog: `.*cloud-init status returned 'recoverable error' status: cloud-init completed but experienced errors\n`,
},
{
comment: "running",
cloudInitOutput: "status: running",
exp: sysconfig.CloudInitEnabled,
},
{
comment: "not run",
cloudInitOutput: "status: not run",
exp: sysconfig.CloudInitEnabled,
},
{
comment: "new unrecognized state",
cloudInitOutput: "status: newfangledstatus",
exp: sysconfig.CloudInitEnabled,
},
{
comment: "restricted by snapd",
restrictedFile: true,
exp: sysconfig.CloudInitRestrictedBySnapd,
},
{
comment: "disabled temporarily",
cloudInitOutput: "status: disabled",
exp: sysconfig.CloudInitUntriggered,
},
{
comment: "disabled permanently via file",
disabledFile: true,
exp: sysconfig.CloudInitDisabledPermanently,
},
{
comment: "disabled permanently via kernel commandline",
disabledKernel: true,
exp: sysconfig.CloudInitDisabledPermanently,
},
{
comment: "errored w/ exit code 0",
cloudInitOutput: "status: error",
exp: sysconfig.CloudInitErrored,
exitCode: 0,
},
{
comment: "errored w/ exit code 1",
cloudInitOutput: "status: error",
exp: sysconfig.CloudInitErrored,
exitCode: 1,
},
{
comment: "broken cloud-init output w/ exit code 0",
cloudInitOutput: "broken cloud-init output",
expError: "invalid cloud-init output: broken cloud-init output",
},
{
comment: "broken cloud-init output w/ exit code 1",
cloudInitOutput: "broken cloud-init output",
exitCode: 1,
expError: "broken cloud-init output",
},
{
comment: "normal cloud-init output w/ exit code 1",
cloudInitOutput: "status: foobar",
exitCode: 1,
expError: "cloud-init errored: status: foobar",
},
}
for _, t := range tt {
old := dirs.GlobalRootDir
dirs.SetRootDir(c.MkDir())
defer func() { dirs.SetRootDir(old) }()
cmd := testutil.MockCommand(c, "cloud-init", fmt.Sprintf(`
if [ "$1" = "status" ]; then
echo '%s'
exit %d
else
echo "unexpected args, $"
exit 1
fi
`, t.cloudInitOutput, t.exitCode))
if t.disabledFile {
cloudDir := filepath.Join(dirs.GlobalRootDir, "etc/cloud")
err := os.MkdirAll(cloudDir, 0755)
c.Assert(err, IsNil)
err = os.WriteFile(filepath.Join(cloudDir, "cloud-init.disabled"), nil, 0644)
c.Assert(err, IsNil)
}
mockProcCmdline := filepath.Join(s.tmpdir, "proc/cmdline")
if t.disabledKernel {
err := os.WriteFile(mockProcCmdline, []byte("BOOT_IMAGE=/vmlinuz-6.1.53- root=UUID=63642d181-ad10-4457-80b0-14289c2183ef ro cloud-init=disabled panic_on_warn"), 0644)
c.Assert(err, IsNil)
} else {
err := os.WriteFile(mockProcCmdline, []byte("BOOT_IMAGE=/vmlinuz-6.1.53- root=UUID=63642d181-ad10-4457-80b0-14289c2183ef ro cloud-init=enabled panic_on_warn"), 0644)
c.Assert(err, IsNil)
}
if t.restrictedFile {
cloudDir := filepath.Join(dirs.GlobalRootDir, "etc/cloud/cloud.cfg.d")
err := os.MkdirAll(cloudDir, 0755)
c.Assert(err, IsNil)
err = os.WriteFile(filepath.Join(cloudDir, "zzzz_snapd.cfg"), nil, 0644)
c.Assert(err, IsNil)
}
logBuf, restore := logger.MockLogger()
defer restore()
status, err := sysconfig.CloudInitStatus()
if t.expError != "" {
c.Assert(err, ErrorMatches, t.expError, Commentf(t.comment))
} else {
c.Assert(err, IsNil)
c.Assert(status, Equals, t.exp, Commentf(t.comment))
}
// if the restricted file was there we don't call cloud-init status
var expCalls [][]string
if !t.restrictedFile && !t.disabledFile && !t.disabledKernel {
expCalls = [][]string{
{"cloud-init", "status"},
}
}
c.Assert(cmd.Calls(), DeepEquals, expCalls, Commentf(t.comment))
cmd.Restore()
if t.expectedLog != "" {
c.Check(logBuf.String(), Matches, t.expectedLog)
}
}
}
func (s *sysconfigSuite) TestCloudInitNotFoundStatus(c *C) {
emptyDir := c.MkDir()
oldPath := os.Getenv("PATH")
defer func() {
c.Assert(os.Setenv("PATH", oldPath), IsNil)
}()
os.Setenv("PATH", emptyDir)
status, err := sysconfig.CloudInitStatus()
c.Assert(err, IsNil)
c.Check(status, Equals, sysconfig.CloudInitNotFound)
}
var gceCloudInitStatusJSON = `{
"v1": {
"datasource": "DataSourceGCE",
"init": {
"errors": [],
"finished": 1591751113.4536479,
"start": 1591751112.130069
},
"stage": null
}
}
`
var multipassNoCloudCloudInitStatusJSON = `{
"v1": {
"datasource": "DataSourceNoCloud [seed=/dev/sr0][dsmode=net]",
"init": {
"errors": [],
"finished": 1591788514.4656117,
"start": 1591788514.2607572
},
"stage": null
}
}`
var localNoneCloudInitStatusJSON = `{
"v1": {
"datasource": "DataSourceNone",
"init": {
"errors": [],
"finished": 1591788514.4656117,
"start": 1591788514.2607572
},
"stage": null
}
}`
var lxdNoCloudCloudInitStatusJSON = `{
"v1": {
"datasource": "DataSourceNoCloud [seed=/var/lib/cloud/seed/nocloud-net][dsmode=net]",
"init": {
"errors": [],
"finished": 1591788737.3982718,
"start": 1591788736.9015596
},
"stage": null
}
}`
var restrictNoCloudYaml = `datasource_list: [NoCloud]
datasource:
NoCloud:
fs_label: null
manual_cache_clean: true
`
func (s *sysconfigSuite) TestRestrictCloudInit(c *C) {
tt := []struct {
comment string
state sysconfig.CloudInitState
sysconfOpts *sysconfig.CloudInitRestrictOptions
cloudInitStatusJSON string
expError string
expRestrictYamlWritten string
expDatasource string
expAction string
expDisableFile bool
}{
{
comment: "already disabled",
state: sysconfig.CloudInitDisabledPermanently,
expError: "cannot restrict cloud-init: already disabled",
},
{
comment: "already restricted",
state: sysconfig.CloudInitRestrictedBySnapd,
expError: "cannot restrict cloud-init: already restricted",
},
{
comment: "errored",
state: sysconfig.CloudInitErrored,
expError: "cannot restrict cloud-init in error or enabled state",
},
{
comment: "enable (not running)",
state: sysconfig.CloudInitEnabled,
expError: "cannot restrict cloud-init in error or enabled state",
},
{
comment: "errored w/ force disable",
state: sysconfig.CloudInitErrored,
sysconfOpts: &sysconfig.CloudInitRestrictOptions{
ForceDisable: true,
},
expAction: "disable",
expDisableFile: true,
},
{
comment: "enable (not running) w/ force disable",
state: sysconfig.CloudInitEnabled,
sysconfOpts: &sysconfig.CloudInitRestrictOptions{
ForceDisable: true,
},
expAction: "disable",
expDisableFile: true,
},
{
comment: "untriggered",
state: sysconfig.CloudInitUntriggered,
expAction: "disable",
expDisableFile: true,
},
{
comment: "unknown status",
state: -1,
expAction: "disable",
expDisableFile: true,
},
{
comment: "gce done",
state: sysconfig.CloudInitDone,
cloudInitStatusJSON: gceCloudInitStatusJSON,
expDatasource: "GCE",
expAction: "restrict",
expRestrictYamlWritten: `datasource_list: [GCE]
`,
},
{
comment: "nocloud done",
state: sysconfig.CloudInitDone,
cloudInitStatusJSON: multipassNoCloudCloudInitStatusJSON,
expDatasource: "NoCloud",
expAction: "restrict",
expRestrictYamlWritten: restrictNoCloudYaml,
},
{
comment: "nocloud uc20 done",
state: sysconfig.CloudInitDone,
cloudInitStatusJSON: multipassNoCloudCloudInitStatusJSON,
sysconfOpts: &sysconfig.CloudInitRestrictOptions{
DisableAfterLocalDatasourcesRun: true,
},
expDatasource: "NoCloud",
expAction: "disable",
expDisableFile: true,
},
{
comment: "none uc20 done",
state: sysconfig.CloudInitDone,
cloudInitStatusJSON: localNoneCloudInitStatusJSON,
sysconfOpts: &sysconfig.CloudInitRestrictOptions{
DisableAfterLocalDatasourcesRun: true,
},
expDatasource: "None",
expAction: "disable",
expDisableFile: true,
},
// the two cases for lxd and multipass are effectively the same, but as
// the largest known users of cloud-init w/ UC, we leave them as
// separate test cases for their different cloud-init status.json
// content
{
comment: "nocloud multipass done",
state: sysconfig.CloudInitDone,
cloudInitStatusJSON: multipassNoCloudCloudInitStatusJSON,
expDatasource: "NoCloud",
expAction: "restrict",
expRestrictYamlWritten: restrictNoCloudYaml,
},
{
comment: "nocloud seed lxd done",
state: sysconfig.CloudInitDone,
cloudInitStatusJSON: lxdNoCloudCloudInitStatusJSON,
expDatasource: "NoCloud",
expAction: "restrict",
expRestrictYamlWritten: restrictNoCloudYaml,
},
{
comment: "nocloud uc20 multipass done",
state: sysconfig.CloudInitDone,
cloudInitStatusJSON: multipassNoCloudCloudInitStatusJSON,
sysconfOpts: &sysconfig.CloudInitRestrictOptions{
DisableAfterLocalDatasourcesRun: true,
},
expDatasource: "NoCloud",
expAction: "disable",
expDisableFile: true,
},
{
comment: "nocloud uc20 seed lxd done",
state: sysconfig.CloudInitDone,
cloudInitStatusJSON: lxdNoCloudCloudInitStatusJSON,
sysconfOpts: &sysconfig.CloudInitRestrictOptions{
DisableAfterLocalDatasourcesRun: true,
},
expDatasource: "NoCloud",
expAction: "disable",
expDisableFile: true,
},
{
comment: "no cloud-init in $PATH",
state: sysconfig.CloudInitNotFound,
expAction: "disable",
expDisableFile: true,
},
}
for _, t := range tt {
comment := Commentf("%s", t.comment)
// setup status.json
old := dirs.GlobalRootDir
dirs.SetRootDir(c.MkDir())
defer func() { dirs.SetRootDir(old) }()
statusJSONFile := filepath.Join(dirs.GlobalRootDir, "/run/cloud-init/status.json")
if t.cloudInitStatusJSON != "" {
err := os.MkdirAll(filepath.Dir(statusJSONFile), 0755)
c.Assert(err, IsNil, comment)
err = os.WriteFile(statusJSONFile, []byte(t.cloudInitStatusJSON), 0644)
c.Assert(err, IsNil, comment)
}
// if we expect snapd to write a yaml config file for cloud-init, ensure
// the dir exists before hand
if t.expRestrictYamlWritten != "" {
err := os.MkdirAll(filepath.Join(dirs.GlobalRootDir, "/etc/cloud/cloud.cfg.d"), 0755)
c.Assert(err, IsNil, comment)
}
res, err := sysconfig.RestrictCloudInit(t.state, t.sysconfOpts)
if t.expError == "" {
c.Assert(err, IsNil, comment)
c.Assert(res.DataSource, Equals, t.expDatasource, comment)
c.Assert(res.Action, Equals, t.expAction, comment)
if t.expRestrictYamlWritten != "" {
// check the snapd restrict yaml file that should have been written
c.Assert(
filepath.Join(dirs.GlobalRootDir, "/etc/cloud/cloud.cfg.d/zzzz_snapd.cfg"),
testutil.FileEquals,
t.expRestrictYamlWritten,
comment,
)
}
// if we expect the disable file to be written then check for it
// otherwise ensure it was not written accidentally
var fileCheck Checker
if t.expDisableFile {
fileCheck = testutil.FilePresent
} else {
fileCheck = testutil.FileAbsent