Exemplo n.º 1
0
func newMesosUpstreams(c *setup.Controller) ([]proxy.Upstream, error) {
	var upstreams []proxy.Upstream

	for c.Next() {
		upstream := &mesosUpstream{
			from:        "",
			hosts:       new(atomic.Value),
			Policy:      &proxy.Random{},
			FailTimeout: 10 * time.Second,
			MaxFails:    1,

			SyncInterval: 120 * time.Second,
			Scheme:       "http",
		}
		upstream.hosts.Store(proxy.HostPool([]*proxy.UpstreamHost{}))
		var proxyHeaders http.Header
		var port string
		if !c.Args(&upstream.from, &upstream.mesosMaster, &upstream.framework, &upstream.taskName, &port) {
			return upstreams, c.ArgErr()
		}
		if p, err := strconv.Atoi(port); err == nil {
			if p == 0 {
				return upstreams, errInvalidPort
			} else {
				upstream.Port = p
			}
		} else {
			return upstreams, err
		}

		for c.NextBlock() {
			switch c.Val() {
			case "policy":
				if !c.NextArg() {
					return upstreams, c.ArgErr()
				}
				switch c.Val() {
				case "random":
					upstream.Policy = &proxy.Random{}
				case "round_robin":
					upstream.Policy = &proxy.RoundRobin{}
				case "least_conn":
					upstream.Policy = &proxy.LeastConn{}
				default:
					return upstreams, c.ArgErr()
				}
			case "fail_timeout":
				if !c.NextArg() {
					return upstreams, c.ArgErr()
				}
				if dur, err := time.ParseDuration(c.Val()); err == nil {
					upstream.FailTimeout = dur
				} else {
					return upstreams, err
				}
			case "max_fails":
				if !c.NextArg() {
					return upstreams, c.ArgErr()
				}
				if n, err := strconv.Atoi(c.Val()); err == nil {
					upstream.MaxFails = int32(n)
				} else {
					return upstreams, err
				}
			case "health_check":
				if !c.NextArg() {
					return upstreams, c.ArgErr()
				}
				upstream.HealthCheck.Path = c.Val()
				upstream.HealthCheck.Interval = 30 * time.Second
				if c.NextArg() {
					if dur, err := time.ParseDuration(c.Val()); err == nil {
						upstream.HealthCheck.Interval = dur
					} else {
						return upstreams, err
					}
				}
			case "proxy_header":
				var header, value string
				if !c.Args(&header, &value) {
					return upstreams, c.ArgErr()
				}
				if proxyHeaders == nil {
					proxyHeaders = make(map[string][]string)
				}
				proxyHeaders.Add(header, value)
			case "sync_interval":
				if !c.NextArg() {
					return upstreams, c.ArgErr()
				}
				if dur, err := time.ParseDuration(c.Val()); err == nil {
					upstream.SyncInterval = dur
				} else {
					return upstreams, err
				}
			case "scheme":
				if !c.NextArg() {
					return upstreams, c.ArgErr()
				}
				upstream.Scheme = c.Val()
			}
		}
		upstream.proxyHeaders = proxyHeaders

		go upstream.syncWorker(nil)
		if upstream.HealthCheck.Path != "" {
			go upstream.healthCheckWorker(nil)
		}

		upstreams = append(upstreams, upstream)
	}
	return upstreams, nil
}