feat(healthcheck): Using HEALTH_CHECKER_TIMEOUT_DURATION to modulate …

…healthcheck timeout duration (fbonalair#37)

README.md

@@ -60,9 +60,10 @@ The webservice configuration is made via environment variables:
 * `CROWDSEC_BOUNCER_LOG_LEVEL`          - Minimum log level for bouncer. Expected value [zerolog levels](https://pkg.go.dev/github.com/rs/zerolog#readme-leveled-logging). Default to 1
 * `CROWDSEC_BOUNCER_BAN_RESPONSE_CODE`  - HTTP code to respond in case of ban. Default to 403
 * `CROWDSEC_BOUNCER_BAN_RESPONSE_MSG`   - HTTP body as message to respond in case of ban. Default to Forbidden
+* `HEALTH_CHECKER_TIMEOUT_DURATION`     - [Golang string represation of a duration](https://pkg.go.dev/time#ParseDuration) to wait for bouncer's answer before failing health check. Default to 2s
 * `PORT`                                - Change listening port of web server. Default listen on 8080
 * `GIN_MODE`                            - By default, run app in "debug" mode. Set it to "release" in production
-* `TRUSTED_PROXIES`                     - List of trusted proxies IP addresses in CIDR format, delimited by ','. Default of 0.0.0.0/0 should be fine for most use cases, but you HAVE to add them directly in traefik. 
+* `TRUSTED_PROXIES`                     - List of trusted proxies IP addresses in CIDR format, delimited by ','. Default of 0.0.0.0/0 should be fine for most use cases, but you HAVE to add them directly in Traefik. 
 
 ## Exposed routes
 The webservice exposes some routes:

docker-compose.yaml

@@ -11,7 +11,8 @@ services:
       - "--providers.docker.exposedbydefault=false"
       - "--entrypoints.web.address=:80"
     volumes:
-      - "/var/run/docker.sock:/var/run/docker.sock:ro"
+      # - "/var/run/docker.sock:/var/run/docker.sock:ro"      # Docker standard mode
+      - "/run/user/1000/docker.sock:/var/run/docker.sock:ro"  # Docker in rootless mode
     network_mode: host
 
   whoami:

healthcheck/healthchecker.go

@@ -5,6 +5,7 @@ import (
 	"log"
 	"net/http"
 	"os"
+	"time"
 )
 
 /**
@@ -13,15 +14,24 @@ import (
 */
 func main() {
 	port := os.Getenv("PORT")
+	timeoutString := os.Getenv("HEALTH_CHECKER_TIMEOUT_DURATION")
 	if port == "" {
 		port = "8080"
 	}
+	if timeoutString == "" {
+		timeoutString = "2s"
+	}
 
 	// Calling bouncer health check
 	healthCheckUrl := fmt.Sprintf("http://127.0.0.1:%s/api/v1/ping", port)
-	resp, err := http.Get(healthCheckUrl)
+	duration, err := time.ParseDuration(timeoutString)
+	if err != nil {
+		log.Fatal("error while parsing HEALTH_CHECKER_TIMEOUT_DURATION value to duration: ", err)
+	}
+	httpClient := http.Client{Timeout: duration}
+	resp, err := httpClient.Get(healthCheckUrl)
 	if err != nil {
-		log.Fatal("error while requesting bouncer's health check route :", err)
+		log.Fatal("error while requesting bouncer's health check route: ", err)
 	}
 
 	if resp.StatusCode == http.StatusOK {