Add grpc prometheus metrics
This provideds generic grpc metrics via prometheus Signed-off-by: Michael Crosby <crosbymichael@gmail.com>
This commit is contained in:
Michael Crosby
parent
a85c28d248
commit
f9212348e4
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@ -6,6 +6,7 @@ import (
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_ "github.com/docker/containerd/services/content"
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_ "github.com/docker/containerd/services/execution"
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_ "github.com/docker/containerd/services/healthcheck"
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_ "github.com/docker/containerd/services/metrics"
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_ "github.com/docker/containerd/snapshot/btrfs"
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_ "github.com/docker/containerd/snapshot/overlay"
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)
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@ -11,6 +11,7 @@ import (
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"syscall"
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"time"
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grpc_prometheus "github.com/grpc-ecosystem/go-grpc-prometheus"
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gocontext "golang.org/x/net/context"
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"google.golang.org/grpc"
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@ -296,7 +297,10 @@ func loadSnapshotter(store *content.Store) (snapshot.Snapshotter, error) {
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}
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func newGRPCServer() *grpc.Server {
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s := grpc.NewServer(grpc.UnaryInterceptor(interceptor))
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s := grpc.NewServer(
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grpc.UnaryInterceptor(interceptor),
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grpc.StreamInterceptor(grpc_prometheus.StreamServerInterceptor),
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)
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return s
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}
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@ -365,7 +369,7 @@ func interceptor(ctx gocontext.Context,
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default:
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fmt.Printf("unknown GRPC server type: %#v\n", info.Server)
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}
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return handler(ctx, req)
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return grpc_prometheus.UnaryServerInterceptor(ctx, req, info, handler)
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}
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func handleSignals(signals chan os.Signal, server *grpc.Server) error {
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@ -0,0 +1,26 @@
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package metrics
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import (
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"github.com/docker/containerd/plugin"
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grpc_prometheus "github.com/grpc-ecosystem/go-grpc-prometheus"
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"google.golang.org/grpc"
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)
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func init() {
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plugin.Register("metrics-grpc", &plugin.Registration{
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Type: plugin.GRPCPlugin,
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Init: New,
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})
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}
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func New(_ *plugin.InitContext) (interface{}, error) {
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return &Service{}, nil
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}
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type Service struct {
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}
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func (s *Service) Register(server *grpc.Server) error {
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grpc_prometheus.Register(server)
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return nil
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}
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@ -30,3 +30,4 @@ github.com/opencontainers/image-spec a431dbcf6a74fca2e0e040b819a836dbe3fb23ca
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github.com/stevvooe/continuity 1530f13d23b34e2ccaf33881fefecc7e28e3577b
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golang.org/x/sync 450f422ab23cf9881c94e2db30cac0eb1b7cf80c
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github.com/BurntSushi/toml v0.2.0-21-g9906417
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github.com/grpc-ecosystem/go-grpc-prometheus 6b7015e65d366bf3f19b2b2a000a831940f0f7e0
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@ -0,0 +1,201 @@
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Apache License
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http://www.apache.org/licenses/
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|
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@ -0,0 +1,245 @@
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# Go gRPC Interceptors for Prometheus monitoring
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[](https://travis-ci.org/grpc-ecosystem/go-grpc-prometheus)
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[](http://goreportcard.com/report/grpc-ecosystem/go-grpc-prometheus)
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[](https://godoc.org/github.com/grpc-ecosystem/go-grpc-prometheus)
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[](LICENSE)
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[Prometheus](https://prometheus.io/) monitoring for your [gRPC Go](https://github.com/grpc/grpc-go) servers and clients.
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A sister implementation for [gRPC Java](https://github.com/grpc/grpc-java) (same metrics, same semantics) is in [grpc-ecosystem/java-grpc-prometheus](https://github.com/grpc-ecosystem/java-grpc-prometheus).
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## Interceptors
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[gRPC Go](https://github.com/grpc/grpc-go) recently acquired support for Interceptors, i.e. middleware that is executed
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by a gRPC Server before the request is passed onto the user's application logic. It is a perfect way to implement
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common patterns: auth, logging and... monitoring.
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To use Interceptors in chains, please see [`go-grpc-middleware`](https://github.com/mwitkow/go-grpc-middleware).
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## Usage
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There are two types of interceptors: client-side and server-side. This package provides monitoring Interceptors for both.
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### Server-side
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```go
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import "github.com/grpc-ecosystem/go-grpc-prometheus"
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...
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// Initialize your gRPC server's interceptor.
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myServer := grpc.NewServer(
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grpc.StreamInterceptor(grpc_prometheus.StreamServerInterceptor),
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grpc.UnaryInterceptor(grpc_prometheus.UnaryServerInterceptor),
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)
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// Register your gRPC service implementations.
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myservice.RegisterMyServiceServer(s.server, &myServiceImpl{})
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// After all your registrations, make sure all of the Prometheus metrics are initialized.
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grpc_prometheus.Register(myServer)
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// Register Prometheus metrics handler.
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http.Handle("/metrics", prometheus.Handler())
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...
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```
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### Client-side
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```go
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import "github.com/grpc-ecosystem/go-grpc-prometheus"
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...
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clientConn, err = grpc.Dial(
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address,
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grpc.WithUnaryInterceptor(UnaryClientInterceptor),
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grpc.WithStreamInterceptor(StreamClientInterceptor)
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)
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client = pb_testproto.NewTestServiceClient(clientConn)
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resp, err := client.PingEmpty(s.ctx, &myservice.Request{Msg: "hello"})
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...
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```
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# Metrics
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## Labels
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All server-side metrics start with `grpc_server` as Prometheus subsystem name. All client-side metrics start with `grpc_client`. Both of them have mirror-concepts. Similarly all methods
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contain the same rich labels:
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* `grpc_service` - the [gRPC service](http://www.grpc.io/docs/#defining-a-service) name, which is the combination of protobuf `package` and
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the `grpc_service` section name. E.g. for `package = mwitkow.testproto` and
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`service TestService` the label will be `grpc_service="mwitkow.testproto.TestService"`
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* `grpc_method` - the name of the method called on the gRPC service. E.g.
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`grpc_method="Ping"`
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* `grpc_type` - the gRPC [type of request](http://www.grpc.io/docs/guides/concepts.html#rpc-life-cycle).
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Differentiating between the two is important especially for latency measurements.
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- `unary` is single request, single response RPC
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- `client_stream` is a multi-request, single response RPC
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- `server_stream` is a single request, multi-response RPC
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- `bidi_stream` is a multi-request, multi-response RPC
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Additionally for completed RPCs, the following labels are used:
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* `grpc_code` - the human-readable [gRPC status code](https://github.com/grpc/grpc-go/blob/master/codes/codes.go).
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The list of all statuses is to long, but here are some common ones:
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- `OK` - means the RPC was successful
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- `IllegalArgument` - RPC contained bad values
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- `Internal` - server-side error not disclosed to the clients
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## Counters
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The counters and their up to date documentation is in [server_reporter.go](server_reporter.go) and [client_reporter.go](client_reporter.go)
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the respective Prometheus handler (usually `/metrics`).
|
||||
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||||
For the purpose of this documentation we will only discuss `grpc_server` metrics. The `grpc_client` ones contain mirror concepts.
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||||
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||||
For simplicity, let's assume we're tracking a single server-side RPC call of [`mwitkow.testproto.TestService`](examples/testproto/test.proto),
|
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calling the method `PingList`. The call succeeds and returns 20 messages in the stream.
|
||||
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||||
First, immediately after the server receives the call it will increment the
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||||
`grpc_server_started_total` and start the handling time clock (if histograms are enabled).
|
||||
|
||||
```jsoniq
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||||
grpc_server_started_total{grpc_method="PingList",grpc_service="mwitkow.testproto.TestService",grpc_type="server_stream"} 1
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||||
```
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||||
|
||||
Then the user logic gets invoked. It receives one message from the client containing the request
|
||||
(it's a `server_stream`):
|
||||
|
||||
```jsoniq
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||||
grpc_server_msg_received_total{grpc_method="PingList",grpc_service="mwitkow.testproto.TestService",grpc_type="server_stream"} 1
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```
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||||
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||||
The user logic may return an error, or send multiple messages back to the client. In this case, on
|
||||
each of the 20 messages sent back, a counter will be incremented:
|
||||
|
||||
```jsoniq
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||||
grpc_server_msg_sent_total{grpc_method="PingList",grpc_service="mwitkow.testproto.TestService",grpc_type="server_stream"} 20
|
||||
```
|
||||
|
||||
After the call completes, it's status (`OK` or other [gRPC status code](https://github.com/grpc/grpc-go/blob/master/codes/codes.go))
|
||||
and the relevant call labels increment the `grpc_server_handled_total` counter.
|
||||
|
||||
```jsoniq
|
||||
grpc_server_handled_total{grpc_code="OK",grpc_method="PingList",grpc_service="mwitkow.testproto.TestService",grpc_type="server_stream"} 1
|
||||
```
|
||||
|
||||
## Histograms
|
||||
|
||||
[Prometheus histograms](https://prometheus.io/docs/concepts/metric_types/#histogram) are a great way
|
||||
to measure latency distributions of your RPCs. However since it is bad practice to have metrics
|
||||
of [high cardinality](https://prometheus.io/docs/practices/instrumentation/#do-not-overuse-labels))
|
||||
the latency monitoring metrics are disabled by default. To enable them please call the following
|
||||
in your server initialization code:
|
||||
|
||||
```jsoniq
|
||||
grpc_prometheus.EnableHandlingTimeHistogram()
|
||||
```
|
||||
|
||||
After the call completes, it's handling time will be recorded in a [Prometheus histogram](https://prometheus.io/docs/concepts/metric_types/#histogram)
|
||||
variable `grpc_server_handling_seconds`. It contains three sub-metrics:
|
||||
|
||||
* `grpc_server_handling_seconds_count` - the count of all completed RPCs by status and method
|
||||
* `grpc_server_handling_seconds_sum` - cumulative time of RPCs by status and method, useful for
|
||||
calculating average handling times
|
||||
* `grpc_server_handling_seconds_bucket` - contains the counts of RPCs by status and method in respective
|
||||
handling-time buckets. These buckets can be used by Prometheus to estimate SLAs (see [here](https://prometheus.io/docs/practices/histograms/))
|
||||
|
||||
The counter values will look as follows:
|
||||
|
||||
```jsoniq
|
||||
grpc_server_handling_seconds_bucket{grpc_code="OK",grpc_method="PingList",grpc_service="mwitkow.testproto.TestService",grpc_type="server_stream",le="0.005"} 1
|
||||
grpc_server_handling_seconds_bucket{grpc_code="OK",grpc_method="PingList",grpc_service="mwitkow.testproto.TestService",grpc_type="server_stream",le="0.01"} 1
|
||||
grpc_server_handling_seconds_bucket{grpc_code="OK",grpc_method="PingList",grpc_service="mwitkow.testproto.TestService",grpc_type="server_stream",le="0.025"} 1
|
||||
grpc_server_handling_seconds_bucket{grpc_code="OK",grpc_method="PingList",grpc_service="mwitkow.testproto.TestService",grpc_type="server_stream",le="0.05"} 1
|
||||
grpc_server_handling_seconds_bucket{grpc_code="OK",grpc_method="PingList",grpc_service="mwitkow.testproto.TestService",grpc_type="server_stream",le="0.1"} 1
|
||||
grpc_server_handling_seconds_bucket{grpc_code="OK",grpc_method="PingList",grpc_service="mwitkow.testproto.TestService",grpc_type="server_stream",le="0.25"} 1
|
||||
grpc_server_handling_seconds_bucket{grpc_code="OK",grpc_method="PingList",grpc_service="mwitkow.testproto.TestService",grpc_type="server_stream",le="0.5"} 1
|
||||
grpc_server_handling_seconds_bucket{grpc_code="OK",grpc_method="PingList",grpc_service="mwitkow.testproto.TestService",grpc_type="server_stream",le="1"} 1
|
||||
grpc_server_handling_seconds_bucket{grpc_code="OK",grpc_method="PingList",grpc_service="mwitkow.testproto.TestService",grpc_type="server_stream",le="2.5"} 1
|
||||
grpc_server_handling_seconds_bucket{grpc_code="OK",grpc_method="PingList",grpc_service="mwitkow.testproto.TestService",grpc_type="server_stream",le="5"} 1
|
||||
grpc_server_handling_seconds_bucket{grpc_code="OK",grpc_method="PingList",grpc_service="mwitkow.testproto.TestService",grpc_type="server_stream",le="10"} 1
|
||||
grpc_server_handling_seconds_bucket{grpc_code="OK",grpc_method="PingList",grpc_service="mwitkow.testproto.TestService",grpc_type="server_stream",le="+Inf"} 1
|
||||
grpc_server_handling_seconds_sum{grpc_code="OK",grpc_method="PingList",grpc_service="mwitkow.testproto.TestService",grpc_type="server_stream"} 0.0003866430000000001
|
||||
grpc_server_handling_seconds_count{grpc_code="OK",grpc_method="PingList",grpc_service="mwitkow.testproto.TestService",grpc_type="server_stream"} 1
|
||||
```
|
||||
|
||||
|
||||
## Useful query examples
|
||||
|
||||
Prometheus philosophy is to provide the most detailed metrics possible to the monitoring system, and
|
||||
let the aggregations be handled there. The verbosity of above metrics make it possible to have that
|
||||
flexibility. Here's a couple of useful monitoring queries:
|
||||
|
||||
|
||||
### request inbound rate
|
||||
```jsoniq
|
||||
sum(rate(grpc_server_started_total{job="foo"}[1m])) by (grpc_service)
|
||||
```
|
||||
For `job="foo"` (common label to differentiate between Prometheus monitoring targets), calculate the
|
||||
rate of requests per second (1 minute window) for each gRPC `grpc_service` that the job has. Please note
|
||||
how the `grpc_method` is being omitted here: all methods of a given gRPC service will be summed together.
|
||||
|
||||
### unary request error rate
|
||||
```jsoniq
|
||||
sum(rate(grpc_server_handled_total{job="foo",grpc_type="unary",grpc_code!="OK"}[1m])) by (grpc_service)
|
||||
```
|
||||
For `job="foo"`, calculate the per-`grpc_service` rate of `unary` (1:1) RPCs that failed, i.e. the
|
||||
ones that didn't finish with `OK` code.
|
||||
|
||||
### unary request error percentage
|
||||
```jsoniq
|
||||
sum(rate(grpc_server_handled_total{job="foo",grpc_type="unary",grpc_code!="OK"}[1m])) by (grpc_service)
|
||||
/
|
||||
sum(rate(grpc_server_started_total{job="foo",grpc_type="unary"}[1m])) by (grpc_service)
|
||||
* 100.0
|
||||
```
|
||||
For `job="foo"`, calculate the percentage of failed requests by service. It's easy to notice that
|
||||
this is a combination of the two above examples. This is an example of a query you would like to
|
||||
[alert on](https://prometheus.io/docs/alerting/rules/) in your system for SLA violations, e.g.
|
||||
"no more than 1% requests should fail".
|
||||
|
||||
### average response stream size
|
||||
```jsoniq
|
||||
sum(rate(grpc_server_msg_sent_total{job="foo",grpc_type="server_stream"}[10m])) by (grpc_service)
|
||||
/
|
||||
sum(rate(grpc_server_started_total{job="foo",grpc_type="server_stream"}[10m])) by (grpc_service)
|
||||
```
|
||||
For `job="foo"` what is the `grpc_service`-wide `10m` average of messages returned for all `
|
||||
server_stream` RPCs. This allows you to track the stream sizes returned by your system, e.g. allows
|
||||
you to track when clients started to send "wide" queries that ret
|
||||
Note the divisor is the number of started RPCs, in order to account for in-flight requests.
|
||||
|
||||
### 99%-tile latency of unary requests
|
||||
```jsoniq
|
||||
histogram_quantile(0.99,
|
||||
sum(rate(grpc_server_handling_seconds_bucket{job="foo",grpc_type="unary"}[5m])) by (grpc_service,le)
|
||||
)
|
||||
```
|
||||
For `job="foo"`, returns an 99%-tile [quantile estimation](https://prometheus.io/docs/practices/histograms/#quantiles)
|
||||
of the handling time of RPCs per service. Please note the `5m` rate, this means that the quantile
|
||||
estimation will take samples in a rolling `5m` window. When combined with other quantiles
|
||||
(e.g. 50%, 90%), this query gives you tremendous insight into the responsiveness of your system
|
||||
(e.g. impact of caching).
|
||||
|
||||
### percentage of slow unary queries (>250ms)
|
||||
```jsoniq
|
||||
100.0 - (
|
||||
sum(rate(grpc_server_handling_seconds_bucket{job="foo",grpc_type="unary",le="0.25"}[5m])) by (grpc_service)
|
||||
/
|
||||
sum(rate(grpc_server_handling_seconds_count{job="foo",grpc_type="unary"}[5m])) by (grpc_service)
|
||||
) * 100.0
|
||||
```
|
||||
For `job="foo"` calculate the by-`grpc_service` fraction of slow requests that took longer than `0.25`
|
||||
seconds. This query is relatively complex, since the Prometheus aggregations use `le` (less or equal)
|
||||
buckets, meaning that counting "fast" requests fractions is easier. However, simple maths helps.
|
||||
This is an example of a query you would like to alert on in your system for SLA violations,
|
||||
e.g. "less than 1% of requests are slower than 250ms".
|
||||
|
||||
|
||||
## Status
|
||||
|
||||
This code has been used since August 2015 as the basis for monitoring of *production* gRPC micro services at [Improbable](https://improbable.io).
|
||||
|
||||
## License
|
||||
|
||||
`go-grpc-prometheus` is released under the Apache 2.0 license. See the [LICENSE](LICENSE) file for details.
|
||||
|
|
@ -0,0 +1,72 @@
|
|||
// Copyright 2016 Michal Witkowski. All Rights Reserved.
|
||||
// See LICENSE for licensing terms.
|
||||
|
||||
// gRPC Prometheus monitoring interceptors for client-side gRPC.
|
||||
|
||||
package grpc_prometheus
|
||||
|
||||
import (
|
||||
"io"
|
||||
|
||||
"golang.org/x/net/context"
|
||||
"google.golang.org/grpc"
|
||||
"google.golang.org/grpc/codes"
|
||||
)
|
||||
|
||||
// UnaryClientInterceptor is a gRPC client-side interceptor that provides Prometheus monitoring for Unary RPCs.
|
||||
func UnaryClientInterceptor(ctx context.Context, method string, req, reply interface{}, cc *grpc.ClientConn, invoker grpc.UnaryInvoker, opts ...grpc.CallOption) error {
|
||||
monitor := newClientReporter(Unary, method)
|
||||
monitor.SentMessage()
|
||||
err := invoker(ctx, method, req, reply, cc, opts...)
|
||||
if err != nil {
|
||||
monitor.ReceivedMessage()
|
||||
}
|
||||
monitor.Handled(grpc.Code(err))
|
||||
return err
|
||||
}
|
||||
|
||||
// StreamServerInterceptor is a gRPC client-side interceptor that provides Prometheus monitoring for Streaming RPCs.
|
||||
func StreamClientInterceptor(ctx context.Context, desc *grpc.StreamDesc, cc *grpc.ClientConn, method string, streamer grpc.Streamer, opts ...grpc.CallOption) (grpc.ClientStream, error) {
|
||||
monitor := newClientReporter(clientStreamType(desc), method)
|
||||
clientStream, err := streamer(ctx, desc, cc, method, opts...)
|
||||
if err != nil {
|
||||
monitor.Handled(grpc.Code(err))
|
||||
return nil, err
|
||||
}
|
||||
return &monitoredClientStream{clientStream, monitor}, nil
|
||||
}
|
||||
|
||||
func clientStreamType(desc *grpc.StreamDesc) grpcType {
|
||||
if desc.ClientStreams && !desc.ServerStreams {
|
||||
return ClientStream
|
||||
} else if !desc.ClientStreams && desc.ServerStreams {
|
||||
return ServerStream
|
||||
}
|
||||
return BidiStream
|
||||
}
|
||||
|
||||
// monitoredClientStream wraps grpc.ClientStream allowing each Sent/Recv of message to increment counters.
|
||||
type monitoredClientStream struct {
|
||||
grpc.ClientStream
|
||||
monitor *clientReporter
|
||||
}
|
||||
|
||||
func (s *monitoredClientStream) SendMsg(m interface{}) error {
|
||||
err := s.ClientStream.SendMsg(m)
|
||||
if err == nil {
|
||||
s.monitor.SentMessage()
|
||||
}
|
||||
return err
|
||||
}
|
||||
|
||||
func (s *monitoredClientStream) RecvMsg(m interface{}) error {
|
||||
err := s.ClientStream.RecvMsg(m)
|
||||
if err == nil {
|
||||
s.monitor.ReceivedMessage()
|
||||
} else if err == io.EOF {
|
||||
s.monitor.Handled(codes.OK)
|
||||
} else {
|
||||
s.monitor.Handled(grpc.Code(err))
|
||||
}
|
||||
return err
|
||||
}
|
||||
111
vendor/github.com/grpc-ecosystem/go-grpc-prometheus/client_reporter.go
generated
vendored
Normal file
111
vendor/github.com/grpc-ecosystem/go-grpc-prometheus/client_reporter.go
generated
vendored
Normal file
|
|
@ -0,0 +1,111 @@
|
|||
// Copyright 2016 Michal Witkowski. All Rights Reserved.
|
||||
// See LICENSE for licensing terms.
|
||||
|
||||
package grpc_prometheus
|
||||
|
||||
import (
|
||||
"time"
|
||||
|
||||
"google.golang.org/grpc/codes"
|
||||
|
||||
prom "github.com/prometheus/client_golang/prometheus"
|
||||
)
|
||||
|
||||
var (
|
||||
clientStartedCounter = prom.NewCounterVec(
|
||||
prom.CounterOpts{
|
||||
Namespace: "grpc",
|
||||
Subsystem: "client",
|
||||
Name: "started_total",
|
||||
Help: "Total number of RPCs started on the client.",
|
||||
}, []string{"grpc_type", "grpc_service", "grpc_method"})
|
||||
|
||||
clientHandledCounter = prom.NewCounterVec(
|
||||
prom.CounterOpts{
|
||||
Namespace: "grpc",
|
||||
Subsystem: "client",
|
||||
Name: "handled_total",
|
||||
Help: "Total number of RPCs completed by the client, regardless of success or failure.",
|
||||
}, []string{"grpc_type", "grpc_service", "grpc_method", "grpc_code"})
|
||||
|
||||
clientStreamMsgReceived = prom.NewCounterVec(
|
||||
prom.CounterOpts{
|
||||
Namespace: "grpc",
|
||||
Subsystem: "client",
|
||||
Name: "msg_received_total",
|
||||
Help: "Total number of RPC stream messages received by the client.",
|
||||
}, []string{"grpc_type", "grpc_service", "grpc_method"})
|
||||
|
||||
clientStreamMsgSent = prom.NewCounterVec(
|
||||
prom.CounterOpts{
|
||||
Namespace: "grpc",
|
||||
Subsystem: "client",
|
||||
Name: "msg_sent_total",
|
||||
Help: "Total number of gRPC stream messages sent by the client.",
|
||||
}, []string{"grpc_type", "grpc_service", "grpc_method"})
|
||||
|
||||
clientHandledHistogramEnabled = false
|
||||
clientHandledHistogramOpts = prom.HistogramOpts{
|
||||
Namespace: "grpc",
|
||||
Subsystem: "client",
|
||||
Name: "handling_seconds",
|
||||
Help: "Histogram of response latency (seconds) of the gRPC until it is finished by the application.",
|
||||
Buckets: prom.DefBuckets,
|
||||
}
|
||||
clientHandledHistogram *prom.HistogramVec
|
||||
)
|
||||
|
||||
func init() {
|
||||
prom.MustRegister(clientStartedCounter)
|
||||
prom.MustRegister(clientHandledCounter)
|
||||
prom.MustRegister(clientStreamMsgReceived)
|
||||
prom.MustRegister(clientStreamMsgSent)
|
||||
}
|
||||
|
||||
// EnableClientHandlingTimeHistogram turns on recording of handling time of RPCs.
|
||||
// Histogram metrics can be very expensive for Prometheus to retain and query.
|
||||
func EnableClientHandlingTimeHistogram(opts ...HistogramOption) {
|
||||
for _, o := range opts {
|
||||
o(&clientHandledHistogramOpts)
|
||||
}
|
||||
if !clientHandledHistogramEnabled {
|
||||
clientHandledHistogram = prom.NewHistogramVec(
|
||||
clientHandledHistogramOpts,
|
||||
[]string{"grpc_type", "grpc_service", "grpc_method"},
|
||||
)
|
||||
prom.Register(clientHandledHistogram)
|
||||
}
|
||||
clientHandledHistogramEnabled = true
|
||||
}
|
||||
|
||||
type clientReporter struct {
|
||||
rpcType grpcType
|
||||
serviceName string
|
||||
methodName string
|
||||
startTime time.Time
|
||||
}
|
||||
|
||||
func newClientReporter(rpcType grpcType, fullMethod string) *clientReporter {
|
||||
r := &clientReporter{rpcType: rpcType}
|
||||
if clientHandledHistogramEnabled {
|
||||
r.startTime = time.Now()
|
||||
}
|
||||
r.serviceName, r.methodName = splitMethodName(fullMethod)
|
||||
clientStartedCounter.WithLabelValues(string(r.rpcType), r.serviceName, r.methodName).Inc()
|
||||
return r
|
||||
}
|
||||
|
||||
func (r *clientReporter) ReceivedMessage() {
|
||||
clientStreamMsgReceived.WithLabelValues(string(r.rpcType), r.serviceName, r.methodName).Inc()
|
||||
}
|
||||
|
||||
func (r *clientReporter) SentMessage() {
|
||||
clientStreamMsgSent.WithLabelValues(string(r.rpcType), r.serviceName, r.methodName).Inc()
|
||||
}
|
||||
|
||||
func (r *clientReporter) Handled(code codes.Code) {
|
||||
clientHandledCounter.WithLabelValues(string(r.rpcType), r.serviceName, r.methodName, code.String()).Inc()
|
||||
if clientHandledHistogramEnabled {
|
||||
clientHandledHistogram.WithLabelValues(string(r.rpcType), r.serviceName, r.methodName).Observe(time.Since(r.startTime).Seconds())
|
||||
}
|
||||
}
|
||||
|
|
@ -0,0 +1,74 @@
|
|||
// Copyright 2016 Michal Witkowski. All Rights Reserved.
|
||||
// See LICENSE for licensing terms.
|
||||
|
||||
// gRPC Prometheus monitoring interceptors for server-side gRPC.
|
||||
|
||||
package grpc_prometheus
|
||||
|
||||
import (
|
||||
"golang.org/x/net/context"
|
||||
"google.golang.org/grpc"
|
||||
)
|
||||
|
||||
// PreregisterServices takes a gRPC server and pre-initializes all counters to 0.
|
||||
// This allows for easier monitoring in Prometheus (no missing metrics), and should be called *after* all services have
|
||||
// been registered with the server.
|
||||
func Register(server *grpc.Server) {
|
||||
serviceInfo := server.GetServiceInfo()
|
||||
for serviceName, info := range serviceInfo {
|
||||
for _, mInfo := range info.Methods {
|
||||
preRegisterMethod(serviceName, &mInfo)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// UnaryServerInterceptor is a gRPC server-side interceptor that provides Prometheus monitoring for Unary RPCs.
|
||||
func UnaryServerInterceptor(ctx context.Context, req interface{}, info *grpc.UnaryServerInfo, handler grpc.UnaryHandler) (interface{}, error) {
|
||||
monitor := newServerReporter(Unary, info.FullMethod)
|
||||
monitor.ReceivedMessage()
|
||||
resp, err := handler(ctx, req)
|
||||
monitor.Handled(grpc.Code(err))
|
||||
if err == nil {
|
||||
monitor.SentMessage()
|
||||
}
|
||||
return resp, err
|
||||
}
|
||||
|
||||
// StreamServerInterceptor is a gRPC server-side interceptor that provides Prometheus monitoring for Streaming RPCs.
|
||||
func StreamServerInterceptor(srv interface{}, ss grpc.ServerStream, info *grpc.StreamServerInfo, handler grpc.StreamHandler) error {
|
||||
monitor := newServerReporter(streamRpcType(info), info.FullMethod)
|
||||
err := handler(srv, &monitoredServerStream{ss, monitor})
|
||||
monitor.Handled(grpc.Code(err))
|
||||
return err
|
||||
}
|
||||
|
||||
func streamRpcType(info *grpc.StreamServerInfo) grpcType {
|
||||
if info.IsClientStream && !info.IsServerStream {
|
||||
return ClientStream
|
||||
} else if !info.IsClientStream && info.IsServerStream {
|
||||
return ServerStream
|
||||
}
|
||||
return BidiStream
|
||||
}
|
||||
|
||||
// monitoredStream wraps grpc.ServerStream allowing each Sent/Recv of message to increment counters.
|
||||
type monitoredServerStream struct {
|
||||
grpc.ServerStream
|
||||
monitor *serverReporter
|
||||
}
|
||||
|
||||
func (s *monitoredServerStream) SendMsg(m interface{}) error {
|
||||
err := s.ServerStream.SendMsg(m)
|
||||
if err == nil {
|
||||
s.monitor.SentMessage()
|
||||
}
|
||||
return err
|
||||
}
|
||||
|
||||
func (s *monitoredServerStream) RecvMsg(m interface{}) error {
|
||||
err := s.ServerStream.RecvMsg(m)
|
||||
if err == nil {
|
||||
s.monitor.ReceivedMessage()
|
||||
}
|
||||
return err
|
||||
}
|
||||
157
vendor/github.com/grpc-ecosystem/go-grpc-prometheus/server_reporter.go
generated
vendored
Normal file
157
vendor/github.com/grpc-ecosystem/go-grpc-prometheus/server_reporter.go
generated
vendored
Normal file
|
|
@ -0,0 +1,157 @@
|
|||
// Copyright 2016 Michal Witkowski. All Rights Reserved.
|
||||
// See LICENSE for licensing terms.
|
||||
|
||||
package grpc_prometheus
|
||||
|
||||
import (
|
||||
"time"
|
||||
|
||||
"google.golang.org/grpc/codes"
|
||||
|
||||
prom "github.com/prometheus/client_golang/prometheus"
|
||||
"google.golang.org/grpc"
|
||||
)
|
||||
|
||||
type grpcType string
|
||||
|
||||
const (
|
||||
Unary grpcType = "unary"
|
||||
ClientStream grpcType = "client_stream"
|
||||
ServerStream grpcType = "server_stream"
|
||||
BidiStream grpcType = "bidi_stream"
|
||||
)
|
||||
|
||||
var (
|
||||
serverStartedCounter = prom.NewCounterVec(
|
||||
prom.CounterOpts{
|
||||
Namespace: "grpc",
|
||||
Subsystem: "server",
|
||||
Name: "started_total",
|
||||
Help: "Total number of RPCs started on the server.",
|
||||
}, []string{"grpc_type", "grpc_service", "grpc_method"})
|
||||
|
||||
serverHandledCounter = prom.NewCounterVec(
|
||||
prom.CounterOpts{
|
||||
Namespace: "grpc",
|
||||
Subsystem: "server",
|
||||
Name: "handled_total",
|
||||
Help: "Total number of RPCs completed on the server, regardless of success or failure.",
|
||||
}, []string{"grpc_type", "grpc_service", "grpc_method", "grpc_code"})
|
||||
|
||||
serverStreamMsgReceived = prom.NewCounterVec(
|
||||
prom.CounterOpts{
|
||||
Namespace: "grpc",
|
||||
Subsystem: "server",
|
||||
Name: "msg_received_total",
|
||||
Help: "Total number of RPC stream messages received on the server.",
|
||||
}, []string{"grpc_type", "grpc_service", "grpc_method"})
|
||||
|
||||
serverStreamMsgSent = prom.NewCounterVec(
|
||||
prom.CounterOpts{
|
||||
Namespace: "grpc",
|
||||
Subsystem: "server",
|
||||
Name: "msg_sent_total",
|
||||
Help: "Total number of gRPC stream messages sent by the server.",
|
||||
}, []string{"grpc_type", "grpc_service", "grpc_method"})
|
||||
|
||||
serverHandledHistogramEnabled = false
|
||||
serverHandledHistogramOpts = prom.HistogramOpts{
|
||||
Namespace: "grpc",
|
||||
Subsystem: "server",
|
||||
Name: "handling_seconds",
|
||||
Help: "Histogram of response latency (seconds) of gRPC that had been application-level handled by the server.",
|
||||
Buckets: prom.DefBuckets,
|
||||
}
|
||||
serverHandledHistogram *prom.HistogramVec
|
||||
)
|
||||
|
||||
func init() {
|
||||
prom.MustRegister(serverStartedCounter)
|
||||
prom.MustRegister(serverHandledCounter)
|
||||
prom.MustRegister(serverStreamMsgReceived)
|
||||
prom.MustRegister(serverStreamMsgSent)
|
||||
}
|
||||
|
||||
type HistogramOption func(*prom.HistogramOpts)
|
||||
|
||||
// WithHistogramBuckets allows you to specify custom bucket ranges for histograms if EnableHandlingTimeHistogram is on.
|
||||
func WithHistogramBuckets(buckets []float64) HistogramOption {
|
||||
return func(o *prom.HistogramOpts) { o.Buckets = buckets }
|
||||
}
|
||||
|
||||
// EnableHandlingTimeHistogram turns on recording of handling time of RPCs for server-side interceptors.
|
||||
// Histogram metrics can be very expensive for Prometheus to retain and query.
|
||||
func EnableHandlingTimeHistogram(opts ...HistogramOption) {
|
||||
for _, o := range opts {
|
||||
o(&serverHandledHistogramOpts)
|
||||
}
|
||||
if !serverHandledHistogramEnabled {
|
||||
serverHandledHistogram = prom.NewHistogramVec(
|
||||
serverHandledHistogramOpts,
|
||||
[]string{"grpc_type", "grpc_service", "grpc_method"},
|
||||
)
|
||||
prom.Register(serverHandledHistogram)
|
||||
}
|
||||
serverHandledHistogramEnabled = true
|
||||
}
|
||||
|
||||
type serverReporter struct {
|
||||
rpcType grpcType
|
||||
serviceName string
|
||||
methodName string
|
||||
startTime time.Time
|
||||
}
|
||||
|
||||
func newServerReporter(rpcType grpcType, fullMethod string) *serverReporter {
|
||||
r := &serverReporter{rpcType: rpcType}
|
||||
if serverHandledHistogramEnabled {
|
||||
r.startTime = time.Now()
|
||||
}
|
||||
r.serviceName, r.methodName = splitMethodName(fullMethod)
|
||||
serverStartedCounter.WithLabelValues(string(r.rpcType), r.serviceName, r.methodName).Inc()
|
||||
return r
|
||||
}
|
||||
|
||||
func (r *serverReporter) ReceivedMessage() {
|
||||
serverStreamMsgReceived.WithLabelValues(string(r.rpcType), r.serviceName, r.methodName).Inc()
|
||||
}
|
||||
|
||||
func (r *serverReporter) SentMessage() {
|
||||
serverStreamMsgSent.WithLabelValues(string(r.rpcType), r.serviceName, r.methodName).Inc()
|
||||
}
|
||||
|
||||
func (r *serverReporter) Handled(code codes.Code) {
|
||||
serverHandledCounter.WithLabelValues(string(r.rpcType), r.serviceName, r.methodName, code.String()).Inc()
|
||||
if serverHandledHistogramEnabled {
|
||||
serverHandledHistogram.WithLabelValues(string(r.rpcType), r.serviceName, r.methodName).Observe(time.Since(r.startTime).Seconds())
|
||||
}
|
||||
}
|
||||
|
||||
// preRegisterMethod is invoked on Register of a Server, allowing all gRPC services labels to be pre-populated.
|
||||
func preRegisterMethod(serviceName string, mInfo *grpc.MethodInfo) {
|
||||
methodName := mInfo.Name
|
||||
methodType := string(typeFromMethodInfo(mInfo))
|
||||
// These are just references (no increments), as just referencing will create the labels but not set values.
|
||||
serverStartedCounter.GetMetricWithLabelValues(methodType, serviceName, methodName)
|
||||
serverStreamMsgReceived.GetMetricWithLabelValues(methodType, serviceName, methodName)
|
||||
serverStreamMsgSent.GetMetricWithLabelValues(methodType, serviceName, methodName)
|
||||
if serverHandledHistogramEnabled {
|
||||
serverHandledHistogram.GetMetricWithLabelValues(methodType, serviceName, methodName)
|
||||
}
|
||||
for _, code := range allCodes {
|
||||
serverHandledCounter.GetMetricWithLabelValues(methodType, serviceName, methodName, code.String())
|
||||
}
|
||||
}
|
||||
|
||||
func typeFromMethodInfo(mInfo *grpc.MethodInfo) grpcType {
|
||||
if mInfo.IsClientStream == false && mInfo.IsServerStream == false {
|
||||
return Unary
|
||||
}
|
||||
if mInfo.IsClientStream == true && mInfo.IsServerStream == false {
|
||||
return ClientStream
|
||||
}
|
||||
if mInfo.IsClientStream == false && mInfo.IsServerStream == true {
|
||||
return ServerStream
|
||||
}
|
||||
return BidiStream
|
||||
}
|
||||
|
|
@ -0,0 +1,27 @@
|
|||
// Copyright 2016 Michal Witkowski. All Rights Reserved.
|
||||
// See LICENSE for licensing terms.
|
||||
|
||||
package grpc_prometheus
|
||||
|
||||
import (
|
||||
"strings"
|
||||
|
||||
"google.golang.org/grpc/codes"
|
||||
)
|
||||
|
||||
var (
|
||||
allCodes = []codes.Code{
|
||||
codes.OK, codes.Canceled, codes.Unknown, codes.InvalidArgument, codes.DeadlineExceeded, codes.NotFound,
|
||||
codes.AlreadyExists, codes.PermissionDenied, codes.Unauthenticated, codes.ResourceExhausted,
|
||||
codes.FailedPrecondition, codes.Aborted, codes.OutOfRange, codes.Unimplemented, codes.Internal,
|
||||
codes.Unavailable, codes.DataLoss,
|
||||
}
|
||||
)
|
||||
|
||||
func splitMethodName(fullMethodName string) (string, string) {
|
||||
fullMethodName = strings.TrimPrefix(fullMethodName, "/") // remove leading slash
|
||||
if i := strings.Index(fullMethodName, "/"); i >= 0 {
|
||||
return fullMethodName[:i], fullMethodName[i+1:]
|
||||
}
|
||||
return "unknown", "unknown"
|
||||
}
|
||||
Loading…
Reference in New Issue