func getRegistryClient() (client.API, error) {
var dial func(string, string) (net.Conn, error)
tun := getTunnelFlag()
if tun != "" {
sshClient, err := ssh.NewSSHClient(globalFlags.SSHUserName, tun, getChecker(), false, getSSHTimeoutFlag())
if err != nil {
return nil, fmt.Errorf("failed initializing SSH client: %v", err)
}
dial = func(network, addr string) (net.Conn, error) {
tcpaddr, err := net.ResolveTCPAddr(network, addr)
if err != nil {
return nil, err
}
return sshClient.DialTCP(network, nil, tcpaddr)
}
}
tlsConfig, err := pkg.ReadTLSConfigFiles(globalFlags.CAFile, globalFlags.CertFile, globalFlags.KeyFile)
if err != nil {
return nil, err
}
trans := &http.Transport{
Dial: dial,
TLSClientConfig: tlsConfig,
}
eCfg := etcd.Config{
Endpoints: strings.Split(globalFlags.Endpoint, ","),
Transport: trans,
}
eClient, err := etcd.New(eCfg)
if err != nil {
return nil, err
}
kAPI := etcd.NewKeysAPI(eClient)
reg := registry.NewEtcdRegistry(kAPI, globalFlags.EtcdKeyPrefix, getRequestTimeoutFlag())
if msg, ok := checkVersion(reg); !ok {
stderr(msg)
}
return &client.RegistryClient{Registry: reg}, nil
}
func NewFleetClient() (client.API, error) {
etcdClient, err := etcdInternal.New(
etcdInternal.Config{Endpoints: []string{os.Getenv("ETCD_URL")}},
)
if err != nil {
return nil, err
}
kAPI := etcdInternal.NewKeysAPI(etcdClient)
reg := registry.NewEtcdRegistry(
kAPI,
registry.DefaultKeyPrefix,
5*time.Second,
)
return &client.RegistryClient{Registry: reg}, nil
}
func getETCDClient(driverEndpoint string, etcdKeyPrefix string) (client.API, error) {
log.Printf("Using ETCD connection for requests")
trans := &http.Transport{}
eCfg := etcd.Config{
Endpoints: strings.Split(driverEndpoint, ","),
Transport: trans,
}
eClient, err := etcd.New(eCfg)
if err != nil {
return nil, err
}
keysAPI := etcd.NewKeysAPI(eClient)
reg := registry.NewEtcdRegistry(keysAPI, etcdKeyPrefix, defaultTimeout)
if msg, ok := checkVersion(reg); !ok {
log.Printf(msg)
}
return &client.RegistryClient{Registry: reg}, nil
}
func New(cfg config.Config) (*Server, error) {
agentTTL, err := time.ParseDuration(cfg.AgentTTL)
if err != nil {
return nil, err
}
mgr, err := systemd.NewSystemdUnitManager(systemd.DefaultUnitsDirectory)
if err != nil {
return nil, err
}
mach, err := newMachineFromConfig(cfg, mgr)
if err != nil {
return nil, err
}
tlsConfig, err := pkg.ReadTLSConfigFiles(cfg.EtcdCAFile, cfg.EtcdCertFile, cfg.EtcdKeyFile)
if err != nil {
return nil, err
}
eCfg := etcd.Config{
Transport: &http.Transport{TLSClientConfig: tlsConfig},
Endpoints: cfg.EtcdServers,
}
eClient, err := etcd.New(eCfg)
if err != nil {
return nil, err
}
etcdRequestTimeout := time.Duration(cfg.EtcdRequestTimeout*1000) * time.Millisecond
kAPI := etcd.NewKeysAPI(eClient)
reg := registry.NewEtcdRegistry(kAPI, cfg.EtcdKeyPrefix, etcdRequestTimeout)
pub := agent.NewUnitStatePublisher(reg, mach, agentTTL)
gen := unit.NewUnitStateGenerator(mgr)
a := agent.New(mgr, gen, reg, mach, agentTTL)
var rStream pkg.EventStream
if !cfg.DisableWatches {
rStream = registry.NewEtcdEventStream(kAPI, cfg.EtcdKeyPrefix)
}
lManager := lease.NewEtcdLeaseManager(kAPI, cfg.EtcdKeyPrefix, etcdRequestTimeout)
ar := agent.NewReconciler(reg, rStream)
e := engine.New(reg, lManager, rStream, mach)
listeners, err := activation.Listeners(false)
if err != nil {
return nil, err
}
hrt := heart.New(reg, mach)
mon := heart.NewMonitor(agentTTL)
apiServer := api.NewServer(listeners, api.NewServeMux(reg, cfg.TokenLimit))
apiServer.Serve()
eIval := time.Duration(cfg.EngineReconcileInterval*1000) * time.Millisecond
srv := Server{
agent: a,
aReconciler: ar,
usGen: gen,
usPub: pub,
engine: e,
mach: mach,
hrt: hrt,
mon: mon,
api: apiServer,
stop: nil,
engineReconcileInterval: eIval,
disableEngine: cfg.DisableEngine,
}
return &srv, nil
}
func New(cfg config.Config) (*Server, error) {
agentTTL, err := time.ParseDuration(cfg.AgentTTL)
if err != nil {
return nil, err
}
mgr, err := systemd.NewSystemdUnitManager(systemd.DefaultUnitsDirectory)
if err != nil {
return nil, err
}
mach, err := newMachineFromConfig(cfg, mgr)
if err != nil {
return nil, err
}
tlsConfig, err := pkg.ReadTLSConfigFiles(cfg.EtcdCAFile, cfg.EtcdCertFile, cfg.EtcdKeyFile)
if err != nil {
return nil, err
}
etcdRequestTimeout := time.Duration(cfg.EtcdRequestTimeout*1000) * time.Millisecond
// set a per server request timeout that is the global request timeout divided by the number of quorum nodes (i.e. 3 out of 5)
// this ensures that the the retry logic in etcd can try at least 3 servers before the global timeout fires and cancels the entire request
quorumCount := (len(cfg.EtcdServers) / 2) + 1
etcdRequestPerServerTimeout := etcdRequestTimeout
if quorumCount > 1 {
etcdRequestPerServerTimeout = time.Duration(int64(etcdRequestTimeout) / int64(quorumCount))
}
log.Infof("Etcd endpoints: %v", strings.Join(cfg.EtcdServers, ","))
log.Infof("Setting global request timeout of %v and per server request timeout of %v using a quorum count of %v", etcdRequestTimeout, etcdRequestPerServerTimeout, quorumCount)
eCfg := etcd.Config{
Transport: &http.Transport{TLSClientConfig: tlsConfig},
Endpoints: cfg.EtcdServers,
HeaderTimeoutPerRequest: etcdRequestPerServerTimeout,
}
eClient, err := etcd.New(eCfg)
if err != nil {
return nil, err
}
kAPI := etcd.NewKeysAPI(eClient)
reg := registry.NewEtcdRegistry(kAPI, cfg.EtcdKeyPrefix, etcdRequestTimeout)
pub := agent.NewUnitStatePublisher(reg, mach, agentTTL)
gen := unit.NewUnitStateGenerator(mgr)
a := agent.New(mgr, gen, reg, mach, agentTTL)
rStream := registry.NewEtcdEventStream(kAPI, cfg.EtcdKeyPrefix)
lManager := lease.NewEtcdLeaseManager(kAPI, cfg.EtcdKeyPrefix, etcdRequestTimeout)
ar := agent.NewReconciler(reg, rStream)
e := engine.New(reg, lManager, rStream, mach)
listeners, err := activation.Listeners(false)
if err != nil {
return nil, err
}
hrt := heart.New(reg, mach)
mon := heart.NewMonitor(agentTTL)
apiServer := api.NewServer(listeners, api.NewServeMux(reg))
apiServer.Serve()
eIval := time.Duration(cfg.EngineReconcileInterval*1000) * time.Millisecond
srv := Server{
agent: a,
aReconciler: ar,
usGen: gen,
usPub: pub,
engine: e,
mach: mach,
hrt: hrt,
mon: mon,
api: apiServer,
stop: nil,
engineReconcileInterval: eIval,
}
return &srv, nil
}