github.com/fafucoder/cilium@v1.6.11/pkg/clustermesh/config_test.go (about)

     1  // Copyright 2018 Authors of Cilium
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  // +build !privileged_tests
    16  
    17  package clustermesh
    18  
    19  import (
    20  	"io/ioutil"
    21  	"os"
    22  	"path"
    23  	"time"
    24  
    25  	"github.com/cilium/cilium/pkg/testutils"
    26  
    27  	. "gopkg.in/check.v1"
    28  )
    29  
    30  func createFile(c *C, name string) {
    31  	err := ioutil.WriteFile(name, []byte("endpoints:\n- https://cluster1.cilium-etcd.cilium.svc:2379\n"), 0644)
    32  	c.Assert(err, IsNil)
    33  }
    34  
    35  func expectExists(c *C, cm *ClusterMesh, name string) {
    36  	c.Assert(cm.clusters[name], Not(IsNil))
    37  }
    38  
    39  func expectChange(c *C, cm *ClusterMesh, name string) {
    40  	cluster := cm.clusters[name]
    41  	c.Assert(cluster, Not(IsNil))
    42  
    43  	select {
    44  	case <-cluster.changed:
    45  	case <-time.After(time.Second):
    46  		c.Fatal("timeout while waiting for changed event")
    47  	}
    48  }
    49  
    50  func expectNotExist(c *C, cm *ClusterMesh, name string) {
    51  	c.Assert(cm.clusters[name], IsNil)
    52  }
    53  
    54  func (s *ClusterMeshTestSuite) TestWatchConfigDirectory(c *C) {
    55  	skipKvstoreConnection = true
    56  	defer func() {
    57  		skipKvstoreConnection = false
    58  	}()
    59  
    60  	dir, err := ioutil.TempDir("", "multicluster")
    61  	c.Assert(err, IsNil)
    62  	defer os.RemoveAll(dir)
    63  
    64  	file1 := path.Join(dir, "cluster1")
    65  	file2 := path.Join(dir, "cluster2")
    66  	file3 := path.Join(dir, "cluster3")
    67  
    68  	createFile(c, file1)
    69  	createFile(c, file2)
    70  
    71  	cm, err := NewClusterMesh(Configuration{
    72  		Name:            "test1",
    73  		ConfigDirectory: dir,
    74  		NodeKeyCreator:  testNodeCreator,
    75  	})
    76  	c.Assert(err, IsNil)
    77  	c.Assert(cm, Not(IsNil))
    78  	defer cm.Close()
    79  
    80  	// wait for cluster1 and cluster2 to appear
    81  	c.Assert(testutils.WaitUntil(func() bool { return len(cm.clusters) == 2 }, time.Second), IsNil)
    82  	expectExists(c, cm, "cluster1")
    83  	expectExists(c, cm, "cluster2")
    84  	expectNotExist(c, cm, "cluster3")
    85  
    86  	err = os.RemoveAll(file1)
    87  	c.Assert(err, IsNil)
    88  
    89  	// wait for cluster1 to disappear
    90  	c.Assert(testutils.WaitUntil(func() bool { return len(cm.clusters) == 1 }, time.Second), IsNil)
    91  
    92  	createFile(c, file3)
    93  
    94  	// wait for cluster3 to appear
    95  	c.Assert(testutils.WaitUntil(func() bool { return len(cm.clusters) == 2 }, time.Second), IsNil)
    96  	expectNotExist(c, cm, "cluster1")
    97  	expectExists(c, cm, "cluster2")
    98  	expectExists(c, cm, "cluster3")
    99  
   100  	// Test renaming of file from cluster3 to cluster1
   101  	err = os.Rename(file3, file1)
   102  	c.Assert(err, IsNil)
   103  
   104  	// wait for cluster1 to appear
   105  	c.Assert(testutils.WaitUntil(func() bool { return cm.clusters["cluster1"] != nil }, time.Second), IsNil)
   106  	expectExists(c, cm, "cluster2")
   107  	expectNotExist(c, cm, "cluster3")
   108  
   109  	// touch file
   110  	err = os.Chtimes(file1, time.Now(), time.Now())
   111  	c.Assert(err, IsNil)
   112  
   113  	// give time for events to be processed
   114  	time.Sleep(100 * time.Millisecond)
   115  	expectChange(c, cm, "cluster1")
   116  
   117  	err = os.RemoveAll(file1)
   118  	c.Assert(err, IsNil)
   119  	err = os.RemoveAll(file2)
   120  	c.Assert(err, IsNil)
   121  
   122  	// wait for all clusters to disappear
   123  	c.Assert(testutils.WaitUntil(func() bool { return len(cm.clusters) == 0 }, time.Second), IsNil)
   124  	expectNotExist(c, cm, "cluster1")
   125  	expectNotExist(c, cm, "cluster2")
   126  	expectNotExist(c, cm, "cluster3")
   127  
   128  }
   129  
   130  func (s *ClusterMeshTestSuite) TestIsEtcdConfigFile(c *C) {
   131  	dir, err := ioutil.TempDir("", "etcdconfig")
   132  	c.Assert(err, IsNil)
   133  	defer os.RemoveAll(dir)
   134  
   135  	validPath := path.Join(dir, "valid")
   136  	err = ioutil.WriteFile(validPath, []byte("endpoints:\n- https://cluster1.cilium-etcd.cilium.svc:2379\n"), 0644)
   137  	c.Assert(err, IsNil)
   138  	c.Assert(isEtcdConfigFile(validPath), Equals, true)
   139  
   140  	invalidPath := path.Join(dir, "valid")
   141  	err = ioutil.WriteFile(invalidPath, []byte("sf324kj234lkjsdvl\nwl34kj23l4k\nendpoints"), 0644)
   142  	c.Assert(err, IsNil)
   143  	c.Assert(isEtcdConfigFile(invalidPath), Equals, false)
   144  }