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Add support for Consul gRPC check #639

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Add support for Consul gRPC check #639

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13 changes: 12 additions & 1 deletion consul/consul.go
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Original file line number Diff line number Diff line change
Expand Up @@ -115,10 +115,21 @@ func (r *ConsulAdapter) buildCheck(service *bridge.Service) *consulapi.AgentServ
if timeout := service.Attrs["check_timeout"]; timeout != "" {
check.Timeout = timeout
}
} else if grpc := service.Attrs["check_grpc"]; grpc != "" {
check.GRPC = fmt.Sprintf("%s:%d", service.IP, service.Port)
if timeout := service.Attrs["check_timeout"]; timeout != "" {
check.Timeout = timeout
}
if useTLS := service.Attrs["check_grpc_use_tls"]; useTLS != "" {
check.GRPCUseTLS = true
if tlsSkipVerify := service.Attrs["check_tls_skip_verify"]; tlsSkipVerify != "" {
check.TLSSkipVerify = true
}
}
} else {
return nil
}
if check.Script != "" || check.HTTP != "" || check.TCP != "" {
if check.Script != "" || check.HTTP != "" || check.TCP != "" || check.GRPC != "" {
if interval := service.Attrs["check_interval"]; interval != "" {
check.Interval = interval
} else {
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14 changes: 14 additions & 0 deletions docs/user/backends.md
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Original file line number Diff line number Diff line change
Expand Up @@ -93,6 +93,20 @@ healthy.
SERVICE_CHECK_TTL=30s
```

### Consul gRPC Check

This feature is only available when using Consul 1.0.5 or newer. Containers
specifying these extra metadata in labels or environment will be used to
register an gRPC health check with the service.

```bash
SERVICE_CHECK_GRPC=true
SERVICE_CHECK_INTERVAL=5s
SERVICE_CHECK_TIMEOUT=3s # optional, Consul default uses 10s
SERVICE_CHECK_GRPC_USE_TLS=true # optional, Consul default uses false
SERVICE_CHECK_TLS_SKIP_VERIFY=true # optional, Consul default uses false
```

### Consul Initial Health Check Status

By default when a service is registered against Consul, the state is set to "critical". You can specify the initial health check status.
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