github.com/hugh712/snapd@v0.0.0-20200910133618-1a99902bd583/overlord/configstate/configcore/network_test.go (about)

     1  // -*- Mode: Go; indent-tabs-mode: t -*-
     2  
     3  /*
     4   * Copyright (C) 2018 Canonical Ltd
     5   *
     6   * This program is free software: you can redistribute it and/or modify
     7   * it under the terms of the GNU General Public License version 3 as
     8   * published by the Free Software Foundation.
     9   *
    10   * This program is distributed in the hope that it will be useful,
    11   * but WITHOUT ANY WARRANTY; without even the implied warranty of
    12   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    13   * GNU General Public License for more details.
    14   *
    15   * You should have received a copy of the GNU General Public License
    16   * along with this program.  If not, see <http://www.gnu.org/licenses/>.
    17   *
    18   */
    19  
    20  package configcore_test
    21  
    22  import (
    23  	"os"
    24  	"path/filepath"
    25  
    26  	. "gopkg.in/check.v1"
    27  
    28  	"github.com/snapcore/snapd/dirs"
    29  	"github.com/snapcore/snapd/osutil"
    30  	"github.com/snapcore/snapd/overlord/configstate/configcore"
    31  	"github.com/snapcore/snapd/release"
    32  	"github.com/snapcore/snapd/testutil"
    33  )
    34  
    35  type networkSuite struct {
    36  	configcoreSuite
    37  
    38  	mockNetworkSysctlPath string
    39  	mockSysctl            *testutil.MockCmd
    40  }
    41  
    42  var _ = Suite(&networkSuite{})
    43  
    44  func (s *networkSuite) SetUpTest(c *C) {
    45  	s.configcoreSuite.SetUpTest(c)
    46  	s.AddCleanup(release.MockOnClassic(false))
    47  
    48  	s.mockSysctl = testutil.MockCommand(c, "sysctl", "")
    49  	s.AddCleanup(s.mockSysctl.Restore)
    50  
    51  	s.mockNetworkSysctlPath = filepath.Join(dirs.GlobalRootDir, "/etc/sysctl.d/10-snapd-network.conf")
    52  	c.Assert(os.MkdirAll(filepath.Dir(s.mockNetworkSysctlPath), 0755), IsNil)
    53  }
    54  
    55  func (s *networkSuite) TestConfigureNetworkIntegrationIPv6(c *C) {
    56  	// disable ipv6
    57  	err := configcore.Run(&mockConf{
    58  		state: s.state,
    59  		conf: map[string]interface{}{
    60  			"network.disable-ipv6": true,
    61  		},
    62  	})
    63  	c.Assert(err, IsNil)
    64  
    65  	c.Check(s.mockNetworkSysctlPath, testutil.FileEquals, "net.ipv6.conf.all.disable_ipv6=1\n")
    66  	c.Check(s.mockSysctl.Calls(), DeepEquals, [][]string{
    67  		{"sysctl", "-w", "net.ipv6.conf.all.disable_ipv6=1"},
    68  	})
    69  	s.mockSysctl.ForgetCalls()
    70  
    71  	// enable it again
    72  	err = configcore.Run(&mockConf{
    73  		state: s.state,
    74  		conf: map[string]interface{}{
    75  			"network.disable-ipv6": false,
    76  		},
    77  	})
    78  	c.Assert(err, IsNil)
    79  
    80  	c.Check(osutil.FileExists(s.mockNetworkSysctlPath), Equals, false)
    81  	c.Check(s.mockSysctl.Calls(), DeepEquals, [][]string{
    82  		{"sysctl", "-w", "net.ipv6.conf.all.disable_ipv6=0"},
    83  	})
    84  	s.mockSysctl.ForgetCalls()
    85  
    86  	// enable it yet again, this does not trigger another syscall
    87  	err = configcore.Run(&mockConf{
    88  		state: s.state,
    89  		conf: map[string]interface{}{
    90  			"network.disable-ipv6": false,
    91  		},
    92  	})
    93  	c.Assert(err, IsNil)
    94  	c.Check(s.mockSysctl.Calls(), HasLen, 0)
    95  }
    96  
    97  func (s *networkSuite) TestConfigureNetworkIntegrationNoSetting(c *C) {
    98  	err := configcore.Run(&mockConf{
    99  		state: s.state,
   100  		conf:  map[string]interface{}{},
   101  	})
   102  	c.Assert(err, IsNil)
   103  
   104  	// the file is not there and was not there before, nothing changed
   105  	// and no sysctl call is generated
   106  	c.Check(osutil.FileExists(s.mockNetworkSysctlPath), Equals, false)
   107  	c.Check(s.mockSysctl.Calls(), HasLen, 0)
   108  }
   109  
   110  func (s *networkSuite) TestFilesystemOnlyApply(c *C) {
   111  	conf := configcore.PlainCoreConfig(map[string]interface{}{
   112  		"network.disable-ipv6": true,
   113  	})
   114  
   115  	tmpDir := c.MkDir()
   116  	c.Assert(os.MkdirAll(filepath.Join(tmpDir, "/etc/sysctl.d/"), 0755), IsNil)
   117  	c.Assert(configcore.FilesystemOnlyApply(tmpDir, conf, nil), IsNil)
   118  
   119  	networkSysctlPath := filepath.Join(tmpDir, "/etc/sysctl.d/10-snapd-network.conf")
   120  	c.Check(networkSysctlPath, testutil.FileEquals, "net.ipv6.conf.all.disable_ipv6=1\n")
   121  
   122  	// sysctl was not executed
   123  	c.Check(s.mockSysctl.Calls(), HasLen, 0)
   124  }
   125  
   126  func (s *networkSuite) TestFilesystemOnlyApplyValidationFails(c *C) {
   127  	conf := configcore.PlainCoreConfig(map[string]interface{}{
   128  		"network.disable-ipv6": "0",
   129  	})
   130  
   131  	tmpDir := c.MkDir()
   132  	c.Assert(configcore.FilesystemOnlyApply(tmpDir, conf, nil), ErrorMatches, `network.disable-ipv6 can only be set to 'true' or 'false'`)
   133  }