Golang PrometheusCollectorOption示例

说明

golang prometheuscollectoroption示例是从最受好评的开源项目中提取的实现代码，你可以参考下面示例的使用方式。

编程语言: Golang

命名空间/包名称: github.com/ipfs/go-ipfs/core/corehttp

示例#1

文件： daemon.go 项目： riversparks/go-ipfs

// serveHTTPGateway collects options, creates listener, prints status message and starts serving requests
func serveHTTPGateway(req cmds.Request) (error, <-chan error) {
	cfg, err := req.InvocContext().GetConfig()
	if err != nil {
		return fmt.Errorf("serveHTTPGateway: GetConfig() failed: %s", err), nil
	}

	gatewayMaddr, err := ma.NewMultiaddr(cfg.Addresses.Gateway)
	if err != nil {
		return fmt.Errorf("serveHTTPGateway: invalid gateway address: %q (err: %s)", cfg.Addresses.Gateway, err), nil
	}

	writable, writableOptionFound, err := req.Option(writableKwd).Bool()
	if err != nil {
		return fmt.Errorf("serveHTTPGateway: req.Option(%s) failed: %s", writableKwd, err), nil
	}
	if !writableOptionFound {
		writable = cfg.Gateway.Writable
	}

	gwLis, err := manet.Listen(gatewayMaddr)
	if err != nil {
		return fmt.Errorf("serveHTTPGateway: manet.Listen(%s) failed: %s", gatewayMaddr, err), nil
	}
	// we might have listened to /tcp/0 - lets see what we are listing on
	gatewayMaddr = gwLis.Multiaddr()

	if writable {
		fmt.Printf("Gateway (writable) server listening on %s\n", gatewayMaddr)
	} else {
		fmt.Printf("Gateway (readonly) server listening on %s\n", gatewayMaddr)
	}

	var opts = []corehttp.ServeOption{
		corehttp.PrometheusCollectorOption("gateway"),
		corehttp.CommandsROOption(*req.InvocContext()),
		corehttp.VersionOption(),
		corehttp.IPNSHostnameOption(),
		corehttp.GatewayOption(writable),
	}

	if len(cfg.Gateway.RootRedirect) > 0 {
		opts = append(opts, corehttp.RedirectOption("", cfg.Gateway.RootRedirect))
	}

	node, err := req.InvocContext().ConstructNode()
	if err != nil {
		return fmt.Errorf("serveHTTPGateway: ConstructNode() failed: %s", err), nil
	}

	errc := make(chan error)
	go func() {
		errc <- corehttp.Serve(node, gwLis.NetListener(), opts...)
		close(errc)
	}()
	return nil, errc
}

示例#2

文件： daemon.go 项目： riversparks/go-ipfs

// serveHTTPApi collects options, creates listener, prints status message and starts serving requests
func serveHTTPApi(req cmds.Request) (error, <-chan error) {
	cfg, err := req.InvocContext().GetConfig()
	if err != nil {
		return fmt.Errorf("serveHTTPApi: GetConfig() failed: %s", err), nil
	}

	apiAddr, _, err := req.Option(commands.ApiOption).String()
	if err != nil {
		return fmt.Errorf("serveHTTPApi: %s", err), nil
	}
	if apiAddr == "" {
		apiAddr = cfg.Addresses.API
	}
	apiMaddr, err := ma.NewMultiaddr(apiAddr)
	if err != nil {
		return fmt.Errorf("serveHTTPApi: invalid API address: %q (err: %s)", apiAddr, err), nil
	}

	apiLis, err := manet.Listen(apiMaddr)
	if err != nil {
		return fmt.Errorf("serveHTTPApi: manet.Listen(%s) failed: %s", apiMaddr, err), nil
	}
	// we might have listened to /tcp/0 - lets see what we are listing on
	apiMaddr = apiLis.Multiaddr()
	fmt.Printf("API server listening on %s\n", apiMaddr)

	unrestricted, _, err := req.Option(unrestrictedApiAccessKwd).Bool()
	if err != nil {
		return fmt.Errorf("serveHTTPApi: Option(%s) failed: %s", unrestrictedApiAccessKwd, err), nil
	}

	apiGw := corehttp.NewGateway(corehttp.GatewayConfig{
		Writable: true,
		BlockList: &corehttp.BlockList{
			Decider: func(s string) bool {
				if unrestricted {
					return true
				}
				// for now, only allow paths in the WebUI path
				for _, webuipath := range corehttp.WebUIPaths {
					if strings.HasPrefix(s, webuipath) {
						return true
					}
				}
				return false
			},
		},
	})
	var opts = []corehttp.ServeOption{
		corehttp.PrometheusCollectorOption("api"),
		corehttp.CommandsOption(*req.InvocContext()),
		corehttp.WebUIOption,
		apiGw.ServeOption(),
		corehttp.VersionOption(),
		defaultMux("/debug/vars"),
		defaultMux("/debug/pprof/"),
		corehttp.LogOption(),
		corehttp.PrometheusOption("/debug/metrics/prometheus"),
	}

	if len(cfg.Gateway.RootRedirect) > 0 {
		opts = append(opts, corehttp.RedirectOption("", cfg.Gateway.RootRedirect))
	}

	node, err := req.InvocContext().ConstructNode()
	if err != nil {
		return fmt.Errorf("serveHTTPApi: ConstructNode() failed: %s", err), nil
	}

	if err := node.Repo.SetAPIAddr(apiMaddr.String()); err != nil {
		return fmt.Errorf("serveHTTPApi: SetAPIAddr() failed: %s", err), nil
	}

	errc := make(chan error)
	go func() {
		errc <- corehttp.Serve(node, apiLis.NetListener(), opts...)
		close(errc)
	}()
	return nil, errc
}