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prototype implementation for managing healthcheck (#91)
* prototype implementation for managing healthcheck - healthcheck service invokes get public key api to verify connectivity with the PKCS11 device - oorhandler exposes InRotation function which can be managed via SIGUSR1 and SIGUSR2 signals - server starts a https listener utilizing healthcheck service and oor handler. Load balancer can be configured to use this this https listener. * proto regen and bump deps * license and lint fixes * update go version * address comments
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| // Copyright 2022 Yahoo. | ||
| // | ||
| // 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. | ||
|
|
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| // Package healthcheck implements health check service for crypki. | ||
| package healthcheck | ||
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|
||
| import ( | ||
| "context" | ||
|
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| "github.com/theparanoids/crypki/api" | ||
| "github.com/theparanoids/crypki/proto" | ||
| ) | ||
|
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| // Service implements proto.HealthCheckServer | ||
| type Service struct { | ||
| proto.UnimplementedHealthServer | ||
| SigningService *api.SigningService | ||
| KeyID string | ||
| // InRotation returns true if the instance is intended to serve traffic, false otherwise. | ||
| InRotation func() bool | ||
| } | ||
|
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||
| // Check implements the health check service for crypki. | ||
| // Based on InRotation() and GetUserSSHCertificateSigningKey() api, it will report appropriate status. | ||
| func (s *Service) Check(ctx context.Context, r *proto.HealthCheckRequest) (*proto.HealthCheckResponse, error) { | ||
| if s.InRotation == nil || !s.InRotation() { | ||
| return &proto.HealthCheckResponse{Status: proto.HealthCheckResponse_NOT_SERVING}, nil | ||
| } | ||
| _, err := s.SigningService.GetUserSSHCertificateSigningKey(ctx, &proto.KeyMeta{Identifier: s.KeyID}) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| return &proto.HealthCheckResponse{Status: proto.HealthCheckResponse_SERVING}, nil | ||
| } |
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