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https://github.com/hellofresh/health-go
Library to provide basic healthcheck functionality to Go applications.
https://github.com/hellofresh/health-go
docker golang-library kubernetes microservice open-source
Last synced: about 1 month ago
JSON representation
Library to provide basic healthcheck functionality to Go applications.
- Host: GitHub
- URL: https://github.com/hellofresh/health-go
- Owner: hellofresh
- License: apache-2.0
- Created: 2017-06-01T13:09:26.000Z (over 7 years ago)
- Default Branch: master
- Last Pushed: 2024-04-15T03:14:13.000Z (8 months ago)
- Last Synced: 2024-08-01T13:29:37.524Z (4 months ago)
- Topics: docker, golang-library, kubernetes, microservice, open-source
- Language: Go
- Homepage:
- Size: 378 KB
- Stars: 503
- Watchers: 222
- Forks: 55
- Open Issues: 9
-
Metadata Files:
- Readme: README.md
- License: LICENSE.txt
Awesome Lists containing this project
- awesome-ccamel - hellofresh/health-go - Library to provide basic healthcheck functionality to Go applications. (Go)
README
# health-go
[](https://goreportcard.com/report/github.com/hellofresh/health-go)
[](https://godoc.org/github.com/hellofresh/health-go)
* Exposes an HTTP handler that retrieves health status of the application
* Implements some generic checkers for the following services:
* RabbitMQ
* PostgreSQL
* Redis
* HTTP
* MongoDB
* MySQL
* gRPC
* Memcached
* InfluxDB
* Nats
## Usage
The library exports `Handler` and `HandlerFunc` functions which are fully compatible with `net/http`.
Additionally, library exports `Measure` function that returns summary status for all the registered health checks,
so it can be used in non-HTTP environments.
### Handler
```go
package main
import (
"context"
"net/http"
"time"
"github.com/hellofresh/health-go/v5"
healthMysql "github.com/hellofresh/health-go/v5/checks/mysql"
)
func main() {
// add some checks on instance creation
h, _ := health.New(health.WithComponent(health.Component{
Name: "myservice",
Version: "v1.0",
}), health.WithChecks(health.Config{
Name: "rabbitmq",
Timeout: time.Second * 5,
SkipOnErr: true,
Check: func(ctx context.Context) error {
// rabbitmq health check implementation goes here
return nil
}}, health.Config{
Name: "mongodb",
Check: func(ctx context.Context) error {
// mongo_db health check implementation goes here
return nil
},
},
))
// and then add some more if needed
h.Register(health.Config{
Name: "mysql",
Timeout: time.Second * 2,
SkipOnErr: false,
Check: healthMysql.New(healthMysql.Config{
DSN: "test:test@tcp(0.0.0.0:31726)/test?charset=utf8",
}),
})
http.Handle("/status", h.Handler())
http.ListenAndServe(":3000", nil)
}
```
### HandlerFunc
```go
package main
import (
"context"
"net/http"
"time"
"github.com/go-chi/chi"
"github.com/hellofresh/health-go/v5"
healthMysql "github.com/hellofresh/health-go/v5/checks/mysql"
)
func main() {
// add some checks on instance creation
h, _ := health.New(health.WithComponent(health.Component{
Name: "myservice",
Version: "v1.0",
}), health.WithChecks(health.Config{
Name: "rabbitmq",
Timeout: time.Second * 5,
SkipOnErr: true,
Check: func(ctx context.Context) error {
// rabbitmq health check implementation goes here
return nil
}}, health.Config{
Name: "mongodb",
Check: func(ctx context.Context) error {
// mongo_db health check implementation goes here
return nil
},
},
))
// and then add some more if needed
h.Register(health.Config{
Name: "mysql",
Timeout: time.Second * 2,
SkipOnErr: false,
Check: healthMysql.New(healthMysql.Config{
DSN: "test:test@tcp(0.0.0.0:31726)/test?charset=utf8",
}),
})
r := chi.NewRouter()
r.Get("/status", h.HandlerFunc)
http.ListenAndServe(":3000", nil)
}
```
For more examples please check [here](https://github.com/hellofresh/health-go/blob/master/_examples/server.go)
## API Documentation
### `GET /status`
Get the health of the application.
- Method: `GET`
- Endpoint: `/status`
- Request:
```
curl localhost:3000/status
```
- Response:
HTTP/1.1 200 OK
```json
{
"status": "OK",
"timestamp": "2017-01-01T00:00:00.413567856+033:00",
"system": {
"version": "go1.8",
"goroutines_count": 4,
"total_alloc_bytes": 21321,
"heap_objects_count": 21323,
"alloc_bytes": 234523
},
"component": {
"name": "myservice",
"version": "v1.0"
}
}
```
HTTP/1.1 200 OK
```json
{
"status": "Partially Available",
"timestamp": "2017-01-01T00:00:00.413567856+033:00",
"failures": {
"rabbitmq": "Failed during rabbitmq health check"
},
"system": {
"version": "go1.8",
"goroutines_count": 4,
"total_alloc_bytes": 21321,
"heap_objects_count": 21323,
"alloc_bytes": 234523
},
"component": {
"name": "myservice",
"version": "v1.0"
}
}
```
HTTP/1.1 503 Service Unavailable
```json
{
"status": "Unavailable",
"timestamp": "2017-01-01T00:00:00.413567856+033:00",
"failures": {
"mongodb": "Failed during mongodb health check"
},
"system": {
"version": "go1.8",
"goroutines_count": 4,
"total_alloc_bytes": 21321,
"heap_objects_count": 21323,
"alloc_bytes": 234523
},
"component": {
"name": "myservice",
"version": "v1.0"
}
}
```
## Contributing
- Fork it
- Create your feature branch (`git checkout -b my-new-feature`)
- Commit your changes (`git commit -am 'Add some feature'`)
- Push to the branch (`git push origin my-new-feature`)
- Create new Pull Request
---
> GitHub [@hellofresh](https://github.com/hellofresh) ·
> Medium [@engineering.hellofresh](https://engineering.hellofresh.com)