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Posted to notifications@skywalking.apache.org by ke...@apache.org on 2020/07/20 12:35:13 UTC

[skywalking-cli] branch master updated: Add gRPC health check (#44)

This is an automated email from the ASF dual-hosted git repository.

kezhenxu94 pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/skywalking-cli.git


The following commit(s) were added to refs/heads/master by this push:
     new 37deff6  Add gRPC health check (#44)
37deff6 is described below

commit 37deff6185eced966dedec3aaebd0c9ed08fce95
Author: Gao Hongtao <ha...@gmail.com>
AuthorDate: Mon Jul 20 20:35:05 2020 +0800

    Add gRPC health check (#44)
---
 commands/common/common.go | 36 ++++++++++++++++++--
 go.mod                    | 22 ++++++++++--
 go.sum                    | 66 ++++++++++++++++++++++++++++++++++++
 grpc/health.go            | 86 +++++++++++++++++++++++++++++++++++++++++++++++
 4 files changed, 204 insertions(+), 6 deletions(-)

diff --git a/commands/common/common.go b/commands/common/common.go
index 2f8bb06..7457569 100644
--- a/commands/common/common.go
+++ b/commands/common/common.go
@@ -20,17 +20,47 @@ package common
 import (
 	"github.com/urfave/cli"
 
-	"github.com/apache/skywalking-cli/display"
-	"github.com/apache/skywalking-cli/display/displayable"
 	"github.com/apache/skywalking-cli/graphql/common"
+	"github.com/apache/skywalking-cli/grpc"
+	"github.com/apache/skywalking-cli/logger"
 )
 
 var Command = cli.Command{
 	Name:    "checkHealth",
 	Aliases: []string{"ch"},
 	Usage:   "Check the health status of OAP server",
+	Flags: []cli.Flag{
+		cli.BoolTFlag{
+			Name:     "grpc",
+			Usage:    "Check gRPC by HealthCheck service",
+			Required: false,
+		},
+		cli.StringFlag{
+			Name:     "grpcAddr",
+			Usage:    "`host:port` to connect",
+			Value:    "127.0.0.1:11800",
+			Required: false,
+		},
+		cli.BoolFlag{
+			Name:     "grpcTLS",
+			Usage:    "use TLS for gRPC",
+			Required: false,
+		},
+	},
 	Action: func(ctx *cli.Context) error {
 		healthStatus := common.CheckHealth(ctx)
-		return display.Display(ctx, &displayable.Displayable{Data: healthStatus})
+		if healthStatus.Score != 0 {
+			return cli.NewExitError(healthStatus.Details, healthStatus.Score)
+		}
+		logger.Log.Println("OAP modules are healthy")
+		if !ctx.BoolT("grpc") {
+			return nil
+		}
+		retCode := grpc.HealthCheck(ctx.String("grpcAddr"), ctx.Bool("grpcTLS"))
+		if retCode != 0 {
+			return cli.NewExitError("gRPC: failed to check health", retCode)
+		}
+		logger.Log.Println("OAP gRPC is healthy")
+		return nil
 	},
 }
diff --git a/go.mod b/go.mod
index b979715..7b40556 100644
--- a/go.mod
+++ b/go.mod
@@ -3,15 +3,31 @@ module github.com/apache/skywalking-cli
 go 1.13
 
 require (
-	github.com/99designs/gqlgen v0.11.1 // indirect
+	github.com/99designs/gqlgen v0.11.3 // indirect
+	github.com/agnivade/levenshtein v1.1.0 // indirect
 	github.com/gizak/termui/v3 v3.1.0
 	github.com/gobuffalo/packr/v2 v2.8.0
+	github.com/gorilla/websocket v1.4.2 // indirect
+	github.com/hashicorp/golang-lru v0.5.4 // indirect
+	github.com/karrick/godirwalk v1.15.6 // indirect
 	github.com/machinebox/graphql v0.2.2
+	github.com/matryer/moq v0.0.0-20200607124540-4638a53893e6 // indirect
 	github.com/mattn/go-runewidth v0.0.4
+	github.com/mitchellh/mapstructure v1.3.2 // indirect
 	github.com/mum4k/termdash v0.10.0
 	github.com/nsf/termbox-go v0.0.0-20190817171036-93860e161317
 	github.com/olekukonko/tablewriter v0.0.2
-	github.com/sirupsen/logrus v1.4.2
+	github.com/pkg/errors v0.9.1 // indirect
+	github.com/rogpeppe/go-internal v1.6.0 // indirect
+	github.com/sirupsen/logrus v1.6.0
+	github.com/spf13/cobra v1.0.0 // indirect
+	github.com/spf13/pflag v1.0.5 // indirect
 	github.com/urfave/cli v1.22.1
-	gopkg.in/yaml.v2 v2.2.4
+	github.com/urfave/cli/v2 v2.2.0 // indirect
+	github.com/vektah/dataloaden v0.3.0 // indirect
+	golang.org/x/crypto v0.0.0-20200709230013-948cd5f35899 // indirect
+	golang.org/x/sys v0.0.0-20200625212154-ddb9806d33ae // indirect
+	golang.org/x/tools v0.0.0-20200717024301-6ddee64345a6 // indirect
+	google.golang.org/grpc v1.24.0
+	gopkg.in/yaml.v2 v2.3.0
 )
diff --git a/go.sum b/go.sum
index 019c53d..a5e4308 100644
--- a/go.sum
+++ b/go.sum
@@ -1,12 +1,16 @@
 cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
 github.com/99designs/gqlgen v0.11.1 h1:QoSL8/AAJ2T3UOeQbdnBR32JcG4pO08+P/g5jdbFkUg=
 github.com/99designs/gqlgen v0.11.1/go.mod h1:vjFOyBZ7NwDl+GdSD4PFn7BQn5Fy7ohJwXn7Vk8zz+c=
+github.com/99designs/gqlgen v0.11.3 h1:oFSxl1DFS9X///uHV3y6CEfpcXWrDUxVblR4Xib2bs4=
+github.com/99designs/gqlgen v0.11.3/go.mod h1:RgX5GRRdDWNkh4pBrdzNpNPFVsdoUFY2+adM6nb1N+4=
 github.com/BurntSushi/toml v0.3.1 h1:WXkYYl6Yr3qBf1K79EBnL4mak0OimBfB0XUf9Vl28OQ=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
 github.com/OneOfOne/xxhash v1.2.2/go.mod h1:HSdplMjZKSmBqAxg5vPj2TmRDmfkzw+cTzAElWljhcU=
 github.com/agnivade/levenshtein v1.0.1/go.mod h1:CURSv5d9Uaml+FovSIICkLbAUZ9S4RqaHDIsdSBg7lM=
 github.com/agnivade/levenshtein v1.0.3 h1:M5ZnqLOoZR8ygVq0FfkXsNOKzMCk0xRiow0R5+5VkQ0=
 github.com/agnivade/levenshtein v1.0.3/go.mod h1:4SFRZbbXWLF4MU1T9Qg0pGgH3Pjs+t6ie5efyrwRJXs=
+github.com/agnivade/levenshtein v1.1.0 h1:n6qGwyHG61v3ABce1rPVZklEYRT8NFpCMrpZdBUbYGM=
+github.com/agnivade/levenshtein v1.1.0/go.mod h1:veldBMzWxcCG2ZvUTKD2kJNRdCk5hVbJomOvKkmgYbo=
 github.com/alecthomas/template v0.0.0-20160405071501-a0175ee3bccc/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=
 github.com/alecthomas/units v0.0.0-20151022065526-2efee857e7cf/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
 github.com/andreyvit/diff v0.0.0-20170406064948-c7f18ee00883/go.mod h1:rCTlJbsFo29Kk6CurOXKm700vrz8f0KW0JNfpkRJY/8=
@@ -30,6 +34,7 @@ github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSs
 github.com/dgrijalva/jwt-go v3.2.0+incompatible/go.mod h1:E3ru+11k8xSBh+hMPgOLZmtrrCbhqsmaPHjLKYnJCaQ=
 github.com/dgryski/go-sip13 v0.0.0-20181026042036-e10d5fee7954/go.mod h1:vAd38F8PWV+bWy6jNmig1y/TA+kYO4g3RSRF0IAv0no=
 github.com/dgryski/trifles v0.0.0-20190318185328-a8d75aae118c/go.mod h1:if7Fbed8SFyPtHLHbg49SI7NAdJiC5WIA09pe59rfAA=
+github.com/dgryski/trifles v0.0.0-20200323201526-dd97f9abfb48/go.mod h1:if7Fbed8SFyPtHLHbg49SI7NAdJiC5WIA09pe59rfAA=
 github.com/fsnotify/fsnotify v1.4.7/go.mod h1:jwhsz4b93w/PPRr/qN1Yymfu8t87LnFCMoQvtojpjFo=
 github.com/ghodss/yaml v1.0.0/go.mod h1:4dBDuWmgqj2HViK6kFavaiC9ZROes6MMH2rRYeMEF04=
 github.com/gizak/termui v3.1.0+incompatible h1:N3CFm+j087lanTxPpHOmQs0uS3s5I9TxoAFy6DqPqv8=
@@ -54,6 +59,8 @@ github.com/golang/groupcache v0.0.0-20190129154638-5b532d6fd5ef/go.mod h1:cIg4er
 github.com/golang/mock v1.1.1/go.mod h1:oTYuIxOrZwtPieC+H1uAHpcLFnEyAGVDL/k47Jfbm0A=
 github.com/golang/protobuf v1.2.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
 github.com/golang/protobuf v1.3.1/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
+github.com/golang/protobuf v1.3.2 h1:6nsPYzhq5kReh6QImI3k5qWzO4PEbvbIW2cwSfR/6xs=
+github.com/golang/protobuf v1.3.2/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
 github.com/google/btree v1.0.0/go.mod h1:lNA+9X1NB3Zf8V7Ke586lFgjr2dZNuvo3lPJSGZ5JPQ=
 github.com/google/go-cmp v0.2.0/go.mod h1:oXzfMopK8JAjlY9xF4vHSVASa0yLyX7SntLO5aqRK0M=
 github.com/gorilla/context v0.0.0-20160226214623-1ea25387ff6f/go.mod h1:kBGZzfjB9CEq2AlWe17Uuf7NDRt0dE0s8S51q0aT7Yg=
@@ -62,23 +69,32 @@ github.com/gorilla/websocket v1.2.0 h1:VJtLvh6VQym50czpZzx07z/kw9EgAxI3x1ZB8taTM
 github.com/gorilla/websocket v1.2.0/go.mod h1:E7qHFY5m1UJ88s3WnNqhKjPHQ0heANvMoAMk2YaljkQ=
 github.com/gorilla/websocket v1.4.0 h1:WDFjx/TMzVgy9VdMMQi2K2Emtwi2QcUQsztZ/zLaH/Q=
 github.com/gorilla/websocket v1.4.0/go.mod h1:E7qHFY5m1UJ88s3WnNqhKjPHQ0heANvMoAMk2YaljkQ=
+github.com/gorilla/websocket v1.4.2 h1:+/TMaTYc4QFitKJxsQ7Yye35DkWvkdLcvGKqM+x0Ufc=
+github.com/gorilla/websocket v1.4.2/go.mod h1:YR8l580nyteQvAITg2hZ9XVh4b55+EU/adAjf1fMHhE=
 github.com/grpc-ecosystem/go-grpc-middleware v1.0.0/go.mod h1:FiyG127CGDf3tlThmgyCl78X/SZQqEOJBCDaAfeWzPs=
 github.com/grpc-ecosystem/go-grpc-prometheus v1.2.0/go.mod h1:8NvIoxWQoOIhqOTXgfV/d3M/q6VIi02HzZEHgUlZvzk=
 github.com/grpc-ecosystem/grpc-gateway v1.9.0/go.mod h1:vNeuVxBJEsws4ogUvrchl83t/GYV9WGTSLVdBhOQFDY=
 github.com/hashicorp/golang-lru v0.5.0 h1:CL2msUPvZTLb5O648aiLNJw3hnBxN2+1Jq8rCOH9wdo=
 github.com/hashicorp/golang-lru v0.5.0/go.mod h1:/m3WP610KZHVQ1SGc6re/UDhFvYD7pJ4Ao+sR/qLZy8=
+github.com/hashicorp/golang-lru v0.5.4 h1:YDjusn29QI/Das2iO9M0BHnIbxPeyuCHsjMW+lJfyTc=
+github.com/hashicorp/golang-lru v0.5.4/go.mod h1:iADmTwqILo4mZ8BN3D2Q6+9jd8WM5uGBxy+E8yxSoD4=
 github.com/hashicorp/hcl v1.0.0/go.mod h1:E5yfLk+7swimpb2L/Alb/PJmXilQ/rhwaUYs4T20WEQ=
+github.com/inconshreveable/mousetrap v1.0.0 h1:Z8tu5sraLXCXIcARxBp/8cbvlwVa7Z1NHg9XEKhtSvM=
 github.com/inconshreveable/mousetrap v1.0.0/go.mod h1:PxqpIevigyE2G7u3NXJIT2ANytuPF1OarO4DADm73n8=
 github.com/jonboulle/clockwork v0.1.0/go.mod h1:Ii8DK3G1RaLaWxj9trq07+26W01tbo22gdxWY5EU2bo=
 github.com/julienschmidt/httprouter v1.2.0/go.mod h1:SYymIcj16QtmaHHD7aYtjjsJG7VTCxuUUipMqKk8s4w=
 github.com/karrick/godirwalk v1.15.3 h1:0a2pXOgtB16CqIqXTiT7+K9L73f74n/aNQUnH6Ortew=
 github.com/karrick/godirwalk v1.15.3/go.mod h1:j4mkqPuvaLI8mp1DroR3P6ad7cyYd4c1qeJ3RV7ULlk=
+github.com/karrick/godirwalk v1.15.6 h1:Yf2mmR8TJy+8Fa0SuQVto5SYap6IF7lNVX4Jdl8G1qA=
+github.com/karrick/godirwalk v1.15.6/go.mod h1:j4mkqPuvaLI8mp1DroR3P6ad7cyYd4c1qeJ3RV7ULlk=
 github.com/kisielk/errcheck v1.1.0/go.mod h1:EZBBE59ingxPouuu3KfxchcWSUPOHkagtvWXihfKN4Q=
 github.com/kisielk/gotool v1.0.0/go.mod h1:XhKaO+MFFWcvkIS/tQcRk01m1F5IRFswLeQ+oQHNcck=
 github.com/konsorten/go-windows-terminal-sequences v1.0.1 h1:mweAR1A6xJ3oS2pRaGiHgQ4OO8tzTaLawm8vnODuwDk=
 github.com/konsorten/go-windows-terminal-sequences v1.0.1/go.mod h1:T0+1ngSBFLxvqU3pZ+m/2kptfBszLMUkC4ZK/EgS/cQ=
 github.com/konsorten/go-windows-terminal-sequences v1.0.2 h1:DB17ag19krx9CFsz4o3enTrPXyIXCl+2iCXH/aMAp9s=
 github.com/konsorten/go-windows-terminal-sequences v1.0.2/go.mod h1:T0+1ngSBFLxvqU3pZ+m/2kptfBszLMUkC4ZK/EgS/cQ=
+github.com/konsorten/go-windows-terminal-sequences v1.0.3 h1:CE8S1cTafDpPvMhIxNJKvHsGVBgn1xWYf1NbHQhywc8=
+github.com/konsorten/go-windows-terminal-sequences v1.0.3/go.mod h1:T0+1ngSBFLxvqU3pZ+m/2kptfBszLMUkC4ZK/EgS/cQ=
 github.com/kr/logfmt v0.0.0-20140226030751-b84e30acd515/go.mod h1:+0opPa2QZZtGFBFZlji/RkVcI2GknAs/DXo4wKdlNEc=
 github.com/kr/pretty v0.1.0/go.mod h1:dAy3ld7l9f0ibDNOQOHHMYYIIbhfbHSm3C4ZsoJORNo=
 github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
@@ -95,7 +111,10 @@ github.com/markbates/oncer v1.0.0 h1:E83IaVAHygyndzPimgUYJjbshhDTALZyXxvk9FOlQRY
 github.com/markbates/oncer v1.0.0/go.mod h1:Z59JA581E9GP6w96jai+TGqafHPW+cPfRxz2aSZ0mcI=
 github.com/markbates/safe v1.0.1 h1:yjZkbvRM6IzKj9tlu/zMJLS0n/V351OZWRnF3QfaUxI=
 github.com/markbates/safe v1.0.1/go.mod h1:nAqgmRi7cY2nqMc92/bSEeQA+R4OheNU2T1kNSCBdG0=
+github.com/matryer/moq v0.0.0-20200106131100-75d0ddfc0007 h1:reVOUXwnhsYv/8UqjvhrMOu5CNT9UapHFLbQ2JcXsmg=
 github.com/matryer/moq v0.0.0-20200106131100-75d0ddfc0007/go.mod h1:9ELz6aaclSIGnZBoaSLZ3NAl1VTufbOrXBPvtcy6WiQ=
+github.com/matryer/moq v0.0.0-20200607124540-4638a53893e6 h1:Cx1ZvZ3SQTli1nKee9qvJ/NJP3vt11s+ilM7NF3QSL8=
+github.com/matryer/moq v0.0.0-20200607124540-4638a53893e6/go.mod h1:9ELz6aaclSIGnZBoaSLZ3NAl1VTufbOrXBPvtcy6WiQ=
 github.com/mattn/go-colorable v0.1.4/go.mod h1:U0ppj6V5qS13XJ6of8GYAs25YV2eR4EVcfRqFIhoBtE=
 github.com/mattn/go-isatty v0.0.8/go.mod h1:Iq45c/XA43vh69/j3iqttzPXn0bhXyGjM0Hdxcsrc5s=
 github.com/mattn/go-isatty v0.0.12/go.mod h1:cbi8OIDigv2wuxKPP5vlRcQ1OAZbq2CE4Kysco4FUpU=
@@ -110,6 +129,8 @@ github.com/mitchellh/mapstructure v0.0.0-20180203102830-a4e142e9c047 h1:zCoDWFD5
 github.com/mitchellh/mapstructure v0.0.0-20180203102830-a4e142e9c047/go.mod h1:FVVH3fgwuzCH5S8UJGiWEs2h04kUh9fWfEaFds41c1Y=
 github.com/mitchellh/mapstructure v1.1.2 h1:fmNYVwqnSfB9mZU6OS2O6GsXM+wcskZDuKQzvN1EDeE=
 github.com/mitchellh/mapstructure v1.1.2/go.mod h1:FVVH3fgwuzCH5S8UJGiWEs2h04kUh9fWfEaFds41c1Y=
+github.com/mitchellh/mapstructure v1.3.2 h1:mRS76wmkOn3KkKAyXDu42V+6ebnXWIztFSYGN7GeoRg=
+github.com/mitchellh/mapstructure v1.3.2/go.mod h1:bFUtVrKA4DC2yAKiSyO/QUcy7e+RRV2QTWOzhPopBRo=
 github.com/mum4k/termdash v0.10.0 h1:uqM6ePiMf+smecb1tJJeON36o1hREeCfOmLFG0iz4a0=
 github.com/mum4k/termdash v0.10.0/go.mod h1:l3tO+lJi9LZqXRq7cu7h5/8rDIK3AzelSuq2v/KncxI=
 github.com/mwitkow/go-conntrack v0.0.0-20161129095857-cc309e4a2223/go.mod h1:qRWi+5nqEBWmkhHvq77mSJWrCKwh8bxhgT7d/eI7P4U=
@@ -126,6 +147,8 @@ github.com/pelletier/go-toml v1.2.0/go.mod h1:5z9KED0ma1S8pY6P1sdut58dfprrGBbd/9
 github.com/pkg/errors v0.8.0/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
 github.com/pkg/errors v0.8.1 h1:iURUrRGxPUNPdy5/HRSm+Yj6okJ6UtLINN0Q9M4+h3I=
 github.com/pkg/errors v0.8.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
+github.com/pkg/errors v0.9.1 h1:FEBLx1zS214owpjy7qsBeixbURkuhQAwrK5UwLGTwt4=
+github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/prometheus/client_golang v0.9.1/go.mod h1:7SWBe2y4D6OKWSNQJUaRYU/AaXPKyh/dDVn+NZz0KFw=
 github.com/prometheus/client_golang v0.9.3/go.mod h1:/TN21ttK/J9q6uSwhBd54HahCDft0ttaMvbicHlPoso=
@@ -137,7 +160,10 @@ github.com/prometheus/procfs v0.0.0-20181005140218-185b4288413d/go.mod h1:c3At6R
 github.com/prometheus/procfs v0.0.0-20190507164030-5867b95ac084/go.mod h1:TjEm7ze935MbeOT/UhFTIMYKhuLP4wbCsTZCD3I8kEA=
 github.com/prometheus/tsdb v0.7.1/go.mod h1:qhTCs0VvXwvX/y3TZrWD7rabWM+ijKTux40TwIPHuXU=
 github.com/rogpeppe/fastuuid v0.0.0-20150106093220-6724a57986af/go.mod h1:XWv6SoW27p1b0cqNHllgS5HIMJraePCO15w5zCzIWYg=
+github.com/rogpeppe/go-internal v1.5.2 h1:qLvObTrvO/XRCqmkKxUlOBc48bI3efyDuAZe25QiF0w=
 github.com/rogpeppe/go-internal v1.5.2/go.mod h1:xXDCJY+GAPziupqXw64V24skbSoqbTEfhy4qGm1nDQc=
+github.com/rogpeppe/go-internal v1.6.0 h1:IZRgg4sfrDH7nsAD1Y/Nwj+GzIfEwpJSLjCaNC3SbsI=
+github.com/rogpeppe/go-internal v1.6.0/go.mod h1:xXDCJY+GAPziupqXw64V24skbSoqbTEfhy4qGm1nDQc=
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@@ -149,13 +175,21 @@ github.com/shurcooL/vfsgen v0.0.0-20180121065927-ffb13db8def0/go.mod h1:TrYk7fJV
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@@ -169,11 +203,19 @@ github.com/ugorji/go v1.1.4/go.mod h1:uQMGLiO92mf5W77hV/PUCpI3pbzQx3CRekS0kk+RGr
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@@ -183,11 +225,16 @@ golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACk
 golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
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@@ -195,13 +242,19 @@ golang.org/x/net v0.0.0-20190311183353-d8887717615a/go.mod h1:t9HGtf8HONx5eT2rtn
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@@ -213,6 +266,10 @@ golang.org/x/sys v0.0.0-20190422165155-953cdadca894 h1:Cz4ceDQGXuKRnVBDTS23GTn/p
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@@ -220,19 +277,25 @@ golang.org/x/tools v0.0.0-20190114222345-bf090417da8b/go.mod h1:n7NCudcB/nEzxVGm
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@@ -245,6 +308,9 @@ gopkg.in/yaml.v2 v2.2.2 h1:ZCJp+EgiOT7lHqUV2J862kp8Qj64Jo6az82+3Td9dZw=
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+gopkg.in/yaml.v2 v2.3.0/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
+honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
 sourcegraph.com/sourcegraph/appdash v0.0.0-20180110180208-2cc67fd64755/go.mod h1:hI742Nqp5OhwiqlzhgfbWU4mW4yO10fP+LoT9WOswdU=
 sourcegraph.com/sourcegraph/appdash-data v0.0.0-20151005221446-73f23eafcf67/go.mod h1:L5q+DGLGOQFpo1snNEkLOJT2d1YTW66rWNzatr3He1k=
diff --git a/grpc/health.go b/grpc/health.go
new file mode 100644
index 0000000..3b83ad2
--- /dev/null
+++ b/grpc/health.go
@@ -0,0 +1,86 @@
+// Licensed to Apache Software Foundation (ASF) under one or more contributor
+// license agreements. See the NOTICE file distributed with
+// this work for additional information regarding copyright
+// ownership. Apache Software Foundation (ASF) licenses this file to you under
+// the Apache License, Version 2.0 (the "License"); you may
+// not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
+package grpc
+
+import (
+	"context"
+	"crypto/tls"
+	"time"
+
+	"github.com/apache/skywalking-cli/logger"
+
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/credentials"
+	healthpb "google.golang.org/grpc/health/grpc_health_v1"
+	"google.golang.org/grpc/status"
+)
+
+const (
+	Healthy           = 0
+	ConnectionFailure = 1
+	RPCFailure        = 2
+	Unhealthy         = 3
+)
+
+func HealthCheck(addr string, enableTLS bool) int {
+	ctx := context.Background()
+
+	opts := []grpc.DialOption{
+		grpc.WithUserAgent("swctl_health_probe"),
+		grpc.WithBlock()}
+	if enableTLS {
+		// #nosec
+		creds := credentials.NewTLS(&tls.Config{
+			InsecureSkipVerify: true,
+		})
+		opts = append(opts, grpc.WithTransportCredentials(creds))
+	} else {
+		opts = append(opts, grpc.WithInsecure())
+	}
+	dialCtx, cancel := context.WithTimeout(ctx, time.Second)
+	defer cancel()
+	conn, err := grpc.DialContext(dialCtx, addr, opts...)
+	if err != nil {
+		if err == context.DeadlineExceeded {
+			logger.Log.Printf("timeout: failed to connect service %q within 1 second", addr)
+		} else {
+			logger.Log.Printf("error: failed to connect service at %q: %+v", addr, err)
+		}
+		return ConnectionFailure
+	}
+	defer conn.Close()
+
+	rpcCtx, rpcCancel := context.WithTimeout(ctx, time.Second)
+	defer rpcCancel()
+	resp, err := healthpb.NewHealthClient(conn).Check(rpcCtx, &healthpb.HealthCheckRequest{Service: ""})
+	if err != nil {
+		if stat, ok := status.FromError(err); ok && stat.Code() == codes.DeadlineExceeded {
+			logger.Log.Printf("timeout: health request did not complete within 1 second")
+		} else {
+			logger.Log.Printf("error: health request failed: %+v", err)
+		}
+		return RPCFailure
+	}
+
+	if resp.GetStatus() != healthpb.HealthCheckResponse_SERVING {
+		logger.Log.Printf("OAP gRPC service is unhealthy %q", resp.GetStatus().String())
+		return Unhealthy
+	}
+	return Healthy
+}