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node_test.go
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node_test.go
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// Copyright 2022 Canonical Ltd.
// Licensed under the AGPLv3, see LICENCE file for details.
package database
import (
"context"
"fmt"
"math/rand"
"os"
"path"
"strconv"
"github.com/juju/testing"
jc "github.com/juju/testing/checkers"
gc "gopkg.in/check.v1"
"github.com/juju/juju/agent"
"github.com/juju/juju/controller"
"github.com/juju/juju/database/app"
"github.com/juju/juju/database/dqlite"
jujutesting "github.com/juju/juju/testing"
)
type nodeManagerSuite struct {
testing.IsolationSuite
}
var _ = gc.Suite(&nodeManagerSuite{})
func (s *nodeManagerSuite) TestEnsureDataDirSuccess(c *gc.C) {
subDir := strconv.Itoa(rand.Intn(10))
cfg := fakeAgentConfig{dataDir: "/tmp/" + subDir}
m := NewNodeManager(cfg, stubLogger{})
expected := fmt.Sprintf("/tmp/%s/%s", subDir, dqliteDataDir)
s.AddCleanup(func(*gc.C) { _ = os.RemoveAll(cfg.DataDir()) })
// Call twice to check both the creation and extant scenarios.
dir, err := m.EnsureDataDir()
c.Assert(err, jc.ErrorIsNil)
c.Check(dir, gc.Equals, expected)
_, err = os.Stat(expected)
c.Assert(err, jc.ErrorIsNil)
dir, err = m.EnsureDataDir()
c.Assert(err, jc.ErrorIsNil)
c.Check(dir, gc.Equals, expected)
_, err = os.Stat(expected)
c.Assert(err, jc.ErrorIsNil)
}
func (s *nodeManagerSuite) TestIsExistingNode(c *gc.C) {
subDir := strconv.Itoa(rand.Intn(10))
cfg := fakeAgentConfig{dataDir: "/tmp/" + subDir}
s.AddCleanup(func(*gc.C) { _ = os.RemoveAll(cfg.DataDir()) })
m := NewNodeManager(cfg, stubLogger{})
// Empty directory indicates we've never started.
extant, err := m.IsExistingNode()
c.Assert(err, jc.ErrorIsNil)
c.Check(extant, jc.IsFalse)
// Non-empty indicates we've come up before.
dataDir, err := m.EnsureDataDir()
c.Assert(err, jc.ErrorIsNil)
someFile := path.Join(dataDir, "a-file.txt")
err = os.WriteFile(someFile, nil, 06000)
c.Assert(err, jc.ErrorIsNil)
extant, err = m.IsExistingNode()
c.Assert(err, jc.ErrorIsNil)
c.Check(extant, jc.IsTrue)
}
func (s *nodeManagerSuite) TestIsBootstrappedNode(c *gc.C) {
subDir := strconv.Itoa(rand.Intn(10))
cfg := fakeAgentConfig{dataDir: "/tmp/" + subDir}
s.AddCleanup(func(*gc.C) { _ = os.RemoveAll(cfg.DataDir()) })
m := NewNodeManager(cfg, stubLogger{})
ctx := context.TODO()
// Empty directory indicates we are not the bootstrapped node.
asBootstrapped, err := m.IsBootstrappedNode(ctx)
c.Assert(err, jc.ErrorIsNil)
c.Check(asBootstrapped, jc.IsFalse)
dataDir, err := m.EnsureDataDir()
c.Assert(err, jc.ErrorIsNil)
clusterFile := path.Join(dataDir, dqliteClusterFileName)
// Multiple nodes indicates the cluster has mutated since bootstrap.
data := `
- Address: 10.246.27.114:17666
ID: 3297041220608546238
Role: 0
- Address: 10.246.27.115:17666
ID: 123456789
Role: 0
`[1:]
err = os.WriteFile(clusterFile, []byte(data), 0600)
c.Assert(err, jc.ErrorIsNil)
asBootstrapped, err = m.IsBootstrappedNode(ctx)
c.Assert(err, jc.ErrorIsNil)
c.Check(asBootstrapped, jc.IsFalse)
// Non-loopback address indicates node was reconfigured since bootstrap.
data = `
- Address: 10.246.27.114:17666
ID: 3297041220608546238
Role: 0
`[1:]
err = os.WriteFile(clusterFile, []byte(data), 0600)
c.Assert(err, jc.ErrorIsNil)
asBootstrapped, err = m.IsBootstrappedNode(ctx)
c.Assert(err, jc.ErrorIsNil)
c.Check(asBootstrapped, jc.IsFalse)
// Loopback IP address indicates the node is as we bootstrapped it.
data = `
- Address: 127.0.0.1:17666
ID: 3297041220608546238
Role: 0
`[1:]
err = os.WriteFile(clusterFile, []byte(data), 0600)
c.Assert(err, jc.ErrorIsNil)
asBootstrapped, err = m.IsBootstrappedNode(ctx)
c.Assert(err, jc.ErrorIsNil)
c.Check(asBootstrapped, jc.IsTrue)
}
func (s *nodeManagerSuite) TestSetClusterServersSuccess(c *gc.C) {
subDir := strconv.Itoa(rand.Intn(10))
cfg := fakeAgentConfig{dataDir: "/tmp/" + subDir}
s.AddCleanup(func(*gc.C) { _ = os.RemoveAll(cfg.DataDir()) })
m := NewNodeManager(cfg, stubLogger{})
ctx := context.TODO()
dataDir, err := m.EnsureDataDir()
c.Assert(err, jc.ErrorIsNil)
clusterFile := path.Join(dataDir, dqliteClusterFileName)
// Write a cluster.yaml file into the Dqlite data directory.
data := []byte(`
- Address: 127.0.0.1:17666
ID: 3297041220608546238
Role: 0
`[1:])
err = os.WriteFile(clusterFile, data, 0600)
c.Assert(err, jc.ErrorIsNil)
servers := []dqlite.NodeInfo{
{
ID: 3297041220608546238,
Address: "10.6.6.6:17666",
Role: 0,
},
}
err = m.SetClusterServers(ctx, servers)
c.Assert(err, jc.ErrorIsNil)
data, err = os.ReadFile(clusterFile)
c.Assert(err, jc.ErrorIsNil)
// cluster.yaml should reflect the new server list.
c.Check(string(data), gc.Equals, `
- Address: 10.6.6.6:17666
ID: 3297041220608546238
Role: 0
`[1:])
}
func (s *nodeManagerSuite) TestSetNodeInfoSuccess(c *gc.C) {
subDir := strconv.Itoa(rand.Intn(10))
cfg := fakeAgentConfig{dataDir: "/tmp/" + subDir}
s.AddCleanup(func(*gc.C) { _ = os.RemoveAll(cfg.DataDir()) })
m := NewNodeManager(cfg, stubLogger{})
dataDir, err := m.EnsureDataDir()
c.Assert(err, jc.ErrorIsNil)
infoFile := path.Join(dataDir, "info.yaml")
// Write a cluster.yaml file into the Dqlite data directory.
data := []byte(`
Address: 127.0.0.1:17666
ID: 3297041220608546238
Role: 0
`[1:])
err = os.WriteFile(infoFile, data, 0600)
c.Assert(err, jc.ErrorIsNil)
server := dqlite.NodeInfo{
ID: 3297041220608546238,
Address: "10.6.6.6:17666",
Role: 0,
}
err = m.SetNodeInfo(server)
c.Assert(err, jc.ErrorIsNil)
data, err = os.ReadFile(infoFile)
c.Assert(err, jc.ErrorIsNil)
// info.yaml should reflect the new node info.
c.Check(string(data), gc.Equals, `
Address: 10.6.6.6:17666
ID: 3297041220608546238
Role: 0
`[1:])
}
func (s *nodeManagerSuite) TestWithAddressOptionSuccess(c *gc.C) {
m := NewNodeManager(nil, stubLogger{})
dqliteApp, err := app.New(c.MkDir(), m.WithAddressOption("127.0.0.1"))
c.Assert(err, jc.ErrorIsNil)
_ = dqliteApp.Close()
}
func (s *nodeManagerSuite) TestWithTLSOptionSuccess(c *gc.C) {
cfg := fakeAgentConfig{}
m := NewNodeManager(cfg, stubLogger{})
withTLS, err := m.WithTLSOption()
c.Assert(err, jc.ErrorIsNil)
dqliteApp, err := app.New(c.MkDir(), withTLS)
c.Assert(err, jc.ErrorIsNil)
_ = dqliteApp.Close()
}
func (s *nodeManagerSuite) TestWithClusterOptionSuccess(c *gc.C) {
cfg := fakeAgentConfig{}
m := NewNodeManager(cfg, stubLogger{})
dqliteApp, err := app.New(c.MkDir(), m.WithClusterOption([]string{"10.6.6.6"}))
c.Assert(err, jc.ErrorIsNil)
_ = dqliteApp.Close()
}
type fakeAgentConfig struct {
agent.Config
dataDir string
apiAddrs []string
}
// DataDir implements agent.Config.
func (cfg fakeAgentConfig) DataDir() string {
return cfg.dataDir
}
// CACert implements agent.Config.
func (cfg fakeAgentConfig) CACert() string {
return jujutesting.CACert
}
// StateServingInfo implements agent.AgentConfig.
func (cfg fakeAgentConfig) StateServingInfo() (controller.StateServingInfo, bool) {
return controller.StateServingInfo{
CAPrivateKey: jujutesting.CAKey,
Cert: jujutesting.ServerCert,
PrivateKey: jujutesting.ServerKey,
}, true
}
// APIAddresses implements agent.Config.
func (cfg fakeAgentConfig) APIAddresses() ([]string, error) {
return cfg.apiAddrs, nil
}