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Add health check endpoint (#18465)

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* chore: add health check endpoint

docs: update document about health check

fix: fix up Sqlite3 ping. current ping will success even if the db file is missing

fix: do not expose privacy information in output field

* refactor: remove HealthChecker struct

* Added `/api/healthz` to install routes.

This was needed for using /api/healthz endpoint in Docker healthchecks,
otherwise, Docker would never become healthy if using healthz endpoint
and users would not be able to complete the installation of Gitea.

* Update modules/cache/cache.go

* fine tune

* Remove unnecessary test code. Now there are 2 routes for installation (and maybe more in future)

Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
Co-authored-by: 6543 <6543@obermui.de>
Co-authored-by: Marcos de Oliveira <marcossantos@furb.br>
This commit is contained in:
ttys3
2022-05-04 19:56:20 +08:00
committed by GitHub
parent 3114cd30b8
commit e933f31426
7 changed files with 261 additions and 13 deletions
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44
docs/content/doc/installation/on-kubernetes.en-us.md
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@@ -25,3 +25,47 @@ helm install gitea gitea-charts/gitea
```
If you would like to customize your install, which includes kubernetes ingress, please refer to the complete [Gitea helm chart configuration details](https://gitea.com/gitea/helm-chart/)
## Health check endpoint
Gitea comes with a health check endpoint `/api/healthz`, you can configure it in kubernetes like this:
```yaml
livenessProbe:
httpGet:
path: /api/healthz
port: http
initialDelaySeconds: 200
timeoutSeconds: 5
periodSeconds: 10
successThreshold: 1
failureThreshold: 10
```
a successful health check response will respond with http code `200`, here's example:
```
HTTP/1.1 200 OK
{
"status": "pass",
"description": "Gitea: Git with a cup of tea",
"checks": {
"cache:ping": [
{
"status": "pass",
"time": "2022-02-19T09:16:08Z"
}
],
"database:ping": [
{
"status": "pass",
"time": "2022-02-19T09:16:08Z"
}
]
}
}
```
for more information, please reference to kubernetes documentation [Define a liveness HTTP request](https://kubernetes.io/docs/tasks/configure-pod-container/configure-liveness-readiness-startup-probes/#define-a-liveness-http-request)

44
docs/content/doc/installation/on-kubernetes.zh-tw.md
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@@ -25,3 +25,47 @@ helm install gitea gitea-charts/gitea
```
若您想自訂安裝（包括使用 kubernetes ingress），請前往完整的 [Gitea helm chart configuration details](https://gitea.com/gitea/helm-chart/)
##運行狀況檢查終端節點
Gitea 附帶了一個運行狀況檢查端點 `/api/healthz`，你可以像這樣在 kubernetes 中配置它:
```yaml
livenessProbe:
httpGet:
path: /api/healthz
port: http
initialDelaySeconds: 200
timeoutSeconds: 5
periodSeconds: 10
successThreshold: 1
failureThreshold: 10
```
成功的運行狀況檢查回應將使用 HTTP 代碼 `200` 進行回應，下面是示例:
```
HTTP/1.1 200 OK
{
"status": "pass",
"description": "Gitea: Git with a cup of tea",
"checks": {
"cache:ping": [
{
"status": "pass",
"time": "2022-02-19T09:16:08Z"
}
],
"database:ping": [
{
"status": "pass",
"time": "2022-02-19T09:16:08Z"
}
]
}
}
```
有關更多信息，請參考kubernetes文檔[定義一個存活態 HTTP請求接口]（https://kubernetes.io/zh/docs/tasks/configure-pod-container/configure-liveness-readiness-startup-probes/）

19
modules/cache/cache.go vendored
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@@ -5,6 +5,7 @@
package cache
import (
"errors"
"fmt"
"strconv"
@@ -34,6 +35,20 @@ func NewContext() error {
if conn, err = newCache(setting.CacheService.Cache); err != nil {
return err
}
if err = Ping(); err != nil {
return err
}
}
return err
}
// Ping checks if the cache service works or not, it not, it returns an error
func Ping() error {
if conn == nil {
return errors.New("cache not available")
}
var err error
const testKey = "__gitea_cache_test"
const testVal = "test-value"
if err = conn.Put(testKey, testVal, 10); err != nil {
@@ -48,9 +63,7 @@ func NewContext() error {
testVal, val,
)
}
}
return err
return nil
}
// GetCache returns the currently configured cache

2
routers/install/routes.go
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@@ -16,6 +16,7 @@ import (
"code.gitea.io/gitea/modules/web"
"code.gitea.io/gitea/modules/web/middleware"
"code.gitea.io/gitea/routers/common"
"code.gitea.io/gitea/routers/web/healthcheck"
"code.gitea.io/gitea/services/forms"
"gitea.com/go-chi/session"
@@ -106,6 +107,7 @@ func Routes() *web.Route {
r.Use(Init)
r.Get("/", Install)
r.Post("/", web.Bind(forms.InstallForm{}), SubmitInstall)
r.Get("/api/healthz", healthcheck.Check)
r.NotFound(web.Wrap(installNotFound))
return r

1
routers/install/routes_test.go
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@@ -13,7 +13,6 @@ import (
func TestRoutes(t *testing.T) {
routes := Routes()
assert.NotNil(t, routes)
assert.Len(t, routes.R.Routes(), 1)
assert.EqualValues(t, "/", routes.R.Routes()[0].Pattern)
assert.Nil(t, routes.R.Routes()[0].SubRoutes)
assert.Len(t, routes.R.Routes()[0].Handlers, 2)

143
routers/web/healthcheck/check.go Normal file
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@@ -0,0 +1,143 @@
// Copyright 2022 The Gitea Authors. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.
package healthcheck
import (
"net/http"
"os"
"time"
"code.gitea.io/gitea/models/db"
"code.gitea.io/gitea/modules/cache"
"code.gitea.io/gitea/modules/json"
"code.gitea.io/gitea/modules/log"
"code.gitea.io/gitea/modules/setting"
)
type status string
const (
// pass healthy (acceptable aliases: "ok" to support Node's Terminus and "up" for Java's SpringBoot)
// fail unhealthy (acceptable aliases: "error" to support Node's Terminus and "down" for Java's SpringBoot), and
// warn healthy, with some concerns.
//
// ref https://datatracker.ietf.org/doc/html/draft-inadarei-api-health-check#section-3.1
// status: (required) indicates whether the service status is acceptable
// or not. API publishers SHOULD use following values for the field:
// The value of the status field is case-insensitive and is tightly
// related with the HTTP response code returned by the health endpoint.
// For "pass" status, HTTP response code in the 2xx-3xx range MUST be
// used. For "fail" status, HTTP response code in the 4xx-5xx range
// MUST be used. In case of the "warn" status, endpoints MUST return
// HTTP status in the 2xx-3xx range, and additional information SHOULD
// be provided, utilizing optional fields of the response.
pass status = "pass"
fail status = "fail"
warn status = "warn"
)
func (s status) ToHTTPStatus() int {
if s == pass || s == warn {
return http.StatusOK
}
return http.StatusFailedDependency
}
type checks map[string][]componentStatus
// response is the data returned by the health endpoint, which will be marshaled to JSON format
type response struct {
Status status `json:"status"`
Description string `json:"description"` // a human-friendly description of the service
Checks checks `json:"checks,omitempty"` // The Checks Object, should be omitted on installation route
}
// componentStatus presents one status of a single check object
// an object that provides detailed health statuses of additional downstream systems and endpoints
// which can affect the overall health of the main API.
type componentStatus struct {
Status status `json:"status"`
Time string `json:"time"` // the date-time, in ISO8601 format
Output string `json:"output,omitempty"` // this field SHOULD be omitted for "pass" state.
}
// Check is the health check API handler
func Check(w http.ResponseWriter, r *http.Request) {
rsp := response{
Status: pass,
Description: setting.AppName,
Checks: make(checks),
}
statuses := make([]status, 0)
if setting.InstallLock {
statuses = append(statuses, checkDatabase(rsp.Checks))
statuses = append(statuses, checkCache(rsp.Checks))
}
for _, s := range statuses {
if s != pass {
rsp.Status = fail
break
}
}
data, _ := json.MarshalIndent(rsp, "", " ")
w.Header().Set("Content-Type", "application/json")
w.WriteHeader(rsp.Status.ToHTTPStatus())
_, _ = w.Write(data)
}
// database checks gitea database status
func checkDatabase(checks checks) status {
st := componentStatus{}
if err := db.GetEngine(db.DefaultContext).Ping(); err != nil {
st.Status = fail
st.Time = getCheckTime()
log.Error("database ping failed with error: %v", err)
} else {
st.Status = pass
st.Time = getCheckTime()
}
if setting.Database.UseSQLite3 && st.Status == pass {
if !setting.EnableSQLite3 {
st.Status = fail
st.Time = getCheckTime()
log.Error("SQLite3 health check failed with error: %v", "this Gitea binary is built without SQLite3 enabled")
} else {
if _, err := os.Stat(setting.Database.Path); err != nil {
st.Status = fail
st.Time = getCheckTime()
log.Error("SQLite3 file exists check failed with error: %v", err)
}
}
}
checks["database:ping"] = []componentStatus{st}
return st.Status
}
// cache checks gitea cache status
func checkCache(checks checks) status {
if !setting.CacheService.Enabled {
return pass
}
st := componentStatus{}
if err := cache.Ping(); err != nil {
st.Status = fail
st.Time = getCheckTime()
log.Error("cache ping failed with error: %v", err)
} else {
st.Status = pass
st.Time = getCheckTime()
}
checks["cache:ping"] = []componentStatus{st}
return st.Status
}
func getCheckTime() string {
return time.Now().UTC().Format(time.RFC3339)
}

3
routers/web/web.go
View File

@@ -31,6 +31,7 @@ import (
"code.gitea.io/gitea/routers/web/events"
"code.gitea.io/gitea/routers/web/explore"
"code.gitea.io/gitea/routers/web/feed"
"code.gitea.io/gitea/routers/web/healthcheck"
"code.gitea.io/gitea/routers/web/misc"
"code.gitea.io/gitea/routers/web/org"
"code.gitea.io/gitea/routers/web/repo"
@@ -191,6 +192,8 @@ func Routes() *web.Route {
rw.WriteHeader(http.StatusOK)
})
routes.Get("/api/healthz", healthcheck.Check)
// Removed: toolbox.Toolboxer middleware will provide debug information which seems unnecessary
common = append(common, context.Contexter())