Add check health command (#43)

assets/graphqls/common/checkHealth.graphql

+# 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.
+
+query {
+    checkHealth {
+        score
+        details
+    }
+}

cmd/main.go

@@ -21,6 +21,7 @@ import (
 	"io/ioutil"
 	"os"
 
+	"github.com/apache/skywalking-cli/commands/common"
 	"github.com/apache/skywalking-cli/commands/trace"
 
 	"github.com/apache/skywalking-cli/commands/metrics"
@@ -87,6 +88,7 @@ func main() {
 		service.Command,
 		metrics.Command,
 		trace.Command,
+		common.Command,
 	}
 
 	app.Before = interceptor.BeforeChain([]cli.BeforeFunc{

commands/common/common.go

+// 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 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"
+)
+
+var Command = cli.Command{
+	Name:    "checkHealth",
+	Aliases: []string{"ch"},
+	Usage:   "Check the health status of OAP server",
+	Action: func(ctx *cli.Context) error {
+		healthStatus := common.CheckHealth(ctx)
+		return display.Display(ctx, &displayable.Displayable{Data: healthStatus})
+	},
+}

graphql/common/common.go

+// 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 common
+
+import (
+	"github.com/machinebox/graphql"
+	"github.com/urfave/cli"
+
+	"github.com/apache/skywalking-cli/assets"
+	"github.com/apache/skywalking-cli/graphql/client"
+	"github.com/apache/skywalking-cli/graphql/schema"
+)
+
+// CheckHealth intends to query the health status of OAP server
+func CheckHealth(ctx *cli.Context) schema.HealthStatus {
+	var response map[string]schema.HealthStatus
+
+	request := graphql.NewRequest(assets.Read("graphqls/common/checkHealth.graphql"))
+
+	client.ExecuteQueryOrFail(ctx, request, &response)
+
+	return response["checkHealth"]
+}

graphql/utils/constants.go

@@ -29,7 +29,6 @@ var StepFormats = map[schema.Step]string{
 	schema.StepMinute: "2006-01-02 1504",
 	schema.StepHour:   "2006-01-02 15",
 	schema.StepDay:    "2006-01-02",
-	schema.StepMonth:  "2006-01",
 }
 
 // StepDuration is a mapping from schema.Step to its time.Duration
@@ -38,5 +37,4 @@ var StepDuration = map[schema.Step]time.Duration{
 	schema.StepMinute: time.Minute,
 	schema.StepHour:   time.Hour,
 	schema.StepDay:    time.Hour * 24,
-	schema.StepMonth:  time.Hour * 24 * 30,
 }

query-protocol @ 563bb51c

-Subproject commit 06373bf0d1204b6d3f410c0daf4c7f72529f28a0
+Subproject commit 563bb51c71922f017911345d7cd5c62a7ac8995c