func stop(path string, controller confab.Controller, agentClient *agent.Client) {
rpcClient, err := consulagent.NewRPCClient("localhost:8400")
if err != nil {
stderr.Printf("error connecting to RPC server: %s", err)
exit(controller, 1)
}
agentClient.ConsulRPCClient = &agent.RPCClient{*rpcClient}
stderr.Printf("stopping agent")
controller.StopAgent()
stderr.Printf("stopped agent")
}
func main() {
flagSet := flag.NewFlagSet("flags", flag.ContinueOnError)
flagSet.BoolVar(&isServer, "server", false, "whether to start the agent in server mode")
flagSet.StringVar(&agentPath, "agent-path", "", "path to the on-filesystem consul `executable`")
flagSet.StringVar(&consulConfigDir, "consul-config-dir", "", "path to consul configuration `directory`")
flagSet.StringVar(&pidFile, "pid-file", "", "path to consul PID `file`")
flagSet.Var(&expectedMembers, "expected-member", "address `list` of the expected members")
flagSet.Var(&encryptionKeys, "encryption-key", "`key` used to encrypt consul traffic")
if len(os.Args) < 2 {
printUsageAndExit("invalid number of arguments", flagSet)
}
command := os.Args[1]
if !validCommand(command) {
printUsageAndExit(fmt.Sprintf("invalid COMMAND %q", command), flagSet)
}
flagSet.Parse(os.Args[2:])
path, err := exec.LookPath(agentPath)
if err != nil {
printUsageAndExit(fmt.Sprintf("\"agent-path\" %q cannot be found", agentPath), flagSet)
}
if len(pidFile) == 0 {
printUsageAndExit("\"pid-file\" cannot be empty", flagSet)
}
if command == "start" {
_, err = os.Stat(consulConfigDir)
if err != nil {
printUsageAndExit(fmt.Sprintf("\"consul-config-dir\" %q could not be found", consulConfigDir), flagSet)
}
if len(expectedMembers) == 0 {
printUsageAndExit("at least one \"expected-member\" must be provided", flagSet)
}
agentRunner := confab.AgentRunner{
Path: path,
PIDFile: pidFile,
ConfigDir: consulConfigDir,
Stdout: os.Stdout,
Stderr: os.Stderr,
}
consulAPIClient, err := api.NewClient(api.DefaultConfig())
if err != nil {
panic(err) // not tested, NewClient never errors
}
agentClient := confab.AgentClient{
ExpectedMembers: expectedMembers,
ConsulAPIAgent: consulAPIClient.Agent(),
ConsulRPCClient: nil,
}
controller := confab.Controller{
AgentRunner: &agentRunner,
AgentClient: &agentClient,
MaxRetries: 10,
SyncRetryDelay: 1 * time.Second,
SyncRetryClock: clock.NewClock(),
EncryptKeys: encryptionKeys,
SSLDisabled: false,
Logger: stdout,
}
err = controller.BootAgent()
if err != nil {
stderr.Printf("error booting consul agent: %s", err)
os.Exit(1)
}
if !isServer {
return
}
rpcClient, err := agent.NewRPCClient("localhost:8400")
if err != nil {
stderr.Printf("error connecting to RPC server: %s", err)
os.Exit(1)
}
agentClient.ConsulRPCClient = &confab.RPCClient{
*rpcClient,
}
err = controller.ConfigureServer()
if err != nil {
stderr.Printf("error connecting to RPC server: %s", err)
os.Exit(1) // not tested; it is challenging with the current fake agent.
}
}
if command == "stop" {
agentRunner := confab.AgentRunner{
Path: path,
PIDFile: pidFile,
ConfigDir: "",
Stdout: os.Stdout,
Stderr: os.Stderr,
}
consulAPIClient, err := api.NewClient(api.DefaultConfig())
if err != nil {
panic(err) // not tested, NewClient never errors
}
agentClient := confab.AgentClient{
ExpectedMembers: nil,
ConsulAPIAgent: consulAPIClient.Agent(),
ConsulRPCClient: nil,
}
controller := confab.Controller{
AgentRunner: &agentRunner,
AgentClient: &agentClient,
MaxRetries: 10,
SyncRetryDelay: 1 * time.Second,
SyncRetryClock: clock.NewClock(),
EncryptKeys: nil,
SSLDisabled: false,
Logger: stdout,
}
rpcClient, err := agent.NewRPCClient("localhost:8400")
if err != nil {
stderr.Printf("error connecting to RPC server: %s", err)
os.Exit(1)
}
agentClient.ConsulRPCClient = &confab.RPCClient{
*rpcClient,
}
stdout.Printf("MAIN: stopping agent")
err = controller.StopAgent()
if err != nil {
stderr.Printf("error stopping agent: %s", err)
os.Exit(1)
}
stdout.Printf("MAIN: stopped agent")
}
}
for i := 0; i < 9; i++ {
agentClient.VerifyJoinedCalls.Returns.Errors[i] = errors.New("some error")
}
agentClient.VerifyJoinedCalls.Returns.Errors[9] = errors.New("the final error")
Expect(controller.BootAgent()).To(MatchError("the final error"))
Expect(agentClient.VerifyJoinedCalls.CallCount).To(Equal(10))
Expect(agentClient.VerifySyncedCalls.CallCount).To(Equal(0))
})
})
})
Describe("StopAgent", func() {
It("tells client to leave the cluster", func() {
Expect(controller.StopAgent()).To(Succeed())
Expect(agentClient.LeaveCall.CallCount).To(Equal(1))
})
It("waits for the agent to stop", func() {
Expect(controller.StopAgent()).To(Succeed())
Expect(agentRunner.WaitCall.CallCount).To(Equal(1))
})
Context("when the agent client Leave() returns an error", func() {
BeforeEach(func() {
agentClient.LeaveCall.Returns.Error = errors.New("leave error")
})
It("tells the runner to stop the agent", func() {
Expect(controller.StopAgent()).To(Succeed())
Expect(agentRunner.StopCall.CallCount).To(Equal(1))
},
{
Action: "controller.boot-agent.verify-joined",
},
{
Action: "controller.boot-agent.verify-joined.failed",
Error: errors.New("timeout exceeded"),
},
}))
})
})
})
Describe("StopAgent", func() {
It("tells client to leave the cluster and waits for the agent to stop", func() {
controller.StopAgent()
Expect(agentClient.LeaveCall.CallCount).To(Equal(1))
Expect(agentRunner.WaitCall.CallCount).To(Equal(1))
Expect(agentRunner.CleanupCall.CallCount).To(Equal(1))
Expect(logger.Messages).To(ContainSequence([]fakes.LoggerMessage{
{
Action: "controller.stop-agent.leave",
},
{
Action: "controller.stop-agent.wait",
},
{
Action: "controller.stop-agent.cleanup",
},
{
Action: "controller.stop-agent.success",
func exit(controller confab.Controller, code int) {
controller.StopAgent()
os.Exit(code)
}