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healthcheck.go
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healthcheck.go
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//
// Copyright 2019 Insolar Technologies GmbH
//
// Licensed 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 api
import (
"net/http"
"github.com/insolar/insolar/core"
)
// HealthChecker allows to check network status of a node.
type HealthChecker struct {
CertificateManager core.CertificateManager
NodeNetwork core.NodeNetwork
}
// NewHealthChecker creates new HealthChecker.
func NewHealthChecker(cm core.CertificateManager, nn core.NodeNetwork) *HealthChecker {
return &HealthChecker{CertificateManager: cm, NodeNetwork: nn}
}
// CheckHandler is a HTTP handler for health check.
func (hc *HealthChecker) CheckHandler(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Content-Type", "text/plain")
for _, node := range hc.CertificateManager.GetCertificate().GetDiscoveryNodes() {
if hc.NodeNetwork.GetWorkingNode(*node.GetNodeRef()) == nil {
w.WriteHeader(http.StatusInternalServerError)
_, _ = w.Write([]byte("FAIL"))
return
}
}
w.WriteHeader(http.StatusOK)
_, _ = w.Write([]byte("OK"))
}