Add option to scan stopped containers

cmd.go

@@ -58,6 +58,9 @@ func init() {
 			fs.Bool("process-caddyfile", true,
 				"Process Caddyfile before loading it, removing invalid servers")
 
+			fs.Bool("scan-stopped-containers", true,
+				"Scan stopped containers and use its labels for caddyfile generation")
+
 			fs.Duration("polling-interval", 30*time.Second,
 				"Interval caddy should manually check docker for a new caddyfile")
 
@@ -138,6 +141,7 @@ func createOptions(flags caddycmd.Flags) *config.Options {
 	labelPrefixFlag := flags.String("label-prefix")
 	proxyServiceTasksFlag := flags.Bool("proxy-service-tasks")
 	processCaddyfileFlag := flags.Bool("process-caddyfile")
+	scanStoppedContainersFlag := flags.Bool("scan-stopped-containers")
 	pollingIntervalFlag := flags.Duration("polling-interval")
 	modeFlag := flags.String("mode")
 	controllerSubnetFlag := flags.String("controller-network")
@@ -233,6 +237,12 @@ func createOptions(flags caddycmd.Flags) *config.Options {
 		options.ProcessCaddyfile = processCaddyfileFlag
 	}
 
+	if scanStoppedContainersEnv := os.Getenv("CADDY_DOCKER_SCAN_STOPPED_CONTAINERS"); scanStoppedContainersEnv != "" {
+		options.ScanStoppedContainers = isTrue.MatchString(scanStoppedContainersEnv)
+	} else {
+		options.ScanStoppedContainers = scanStoppedContainersFlag
+	}
+
 	if pollingIntervalEnv := os.Getenv("CADDY_DOCKER_POLLING_INTERVAL"); pollingIntervalEnv != "" {
 		if p, err := time.ParseDuration(pollingIntervalEnv); err != nil {
 			log.Error("Failed to parse CADDY_DOCKER_POLLING_INTERVAL", zap.String("CADDY_DOCKER_POLLING_INTERVAL", pollingIntervalEnv), zap.Error(err))

config/options.go

@@ -9,12 +9,13 @@ import (
 type Options struct {
 	CaddyfilePath          string
 	DockerSockets          []string
-	DockerCertsPath 	   []string
-	DockerAPIsVersion 	   []string
+	DockerCertsPath        []string
+	DockerAPIsVersion      []string
 	LabelPrefix            string
 	ControlledServersLabel string
 	ProxyServiceTasks      bool
 	ProcessCaddyfile       bool
+	ScanStoppedContainers  bool
 	PollingInterval        time.Duration
 	Mode                   Mode
 	Secret                 string

generator/generator.go

@@ -117,7 +117,7 @@ func (g *CaddyfileGenerator) GenerateCaddyfile(logger *zap.Logger) ([]byte, []st
 		}
 
 		// Add containers
-		containers, err := dockerClient.ContainerList(context.Background(), types.ContainerListOptions{})
+		containers, err := dockerClient.ContainerList(context.Background(), types.ContainerListOptions{All: g.options.ScanStoppedContainers})
 		if err == nil {
 			for _, container := range containers {
 				if _, isControlledServer := container.Labels[g.options.ControlledServersLabel]; isControlledServer {

loader.go

@@ -138,8 +138,9 @@ func (dockerLoader *DockerLoader) Start() error {
 			zap.String("CaddyfilePath", dockerLoader.options.CaddyfilePath),
 			zap.String("LabelPrefix", dockerLoader.options.LabelPrefix),
 			zap.Duration("PollingInterval", dockerLoader.options.PollingInterval),
-			zap.Bool("ProcessCaddyfile", dockerLoader.options.ProcessCaddyfile),
 			zap.Bool("ProxyServiceTasks", dockerLoader.options.ProxyServiceTasks),
+			zap.Bool("ProcessCaddyfile", dockerLoader.options.ProcessCaddyfile),
+			zap.Bool("ScanStoppedContainers", dockerLoader.options.ScanStoppedContainers),
 			zap.String("IngressNetworks", fmt.Sprintf("%v", dockerLoader.options.IngressNetworks)),
 			zap.Strings("DockerSockets", dockerLoader.options.DockerSockets),
 			zap.Strings("DockerCertsPath", dockerLoader.options.DockerCertsPath),

tests/caddyfile+config/config/.gitignore

@@ -0,0 +1 @@
+caddy

tests/containers/run.sh

@@ -0,0 +1,21 @@
+#!/bin/bash
+
+set -e
+
+. ../functions.sh
+
+trap "docker rm -f caddy whoami0 whoami1 whoami_stopped" EXIT
+
+{
+    docker run --name caddy -d -p 4443:443 -e CADDY_DOCKER_SCAN_STOPPED_CONTAINERS=true -v /var/run/docker.sock:/var/run/docker.sock caddy-docker-proxy:local &&
+    docker run --name whoami0 -d -l caddy=whoami0.example.com -l "caddy.reverse_proxy={{upstreams 80}}" -l caddy.tls=internal containous/whoami &&
+    docker run --name whoami1 -d -l caddy=whoami1.example.com -l "caddy.reverse_proxy={{upstreams 80}}" -l caddy.tls=internal containous/whoami &&
+    docker create --name whoami_stopped -l caddy=whoami_stopped.example.com -l "caddy.respond=\"I'm a stopped container!\" 200" -l caddy.tls=internal containous/whoami &&
+
+    retry curl -k --resolve whoami0.example.com:4443:127.0.0.1 https://whoami0.example.com:4443 &&
+    retry curl -k --resolve whoami1.example.com:4443:127.0.0.1 https://whoami1.example.com:4443 &&
+    retry curl -k --resolve whoami_stopped.example.com:4443:127.0.0.1 https://whoami_stopped.example.com:4443
+} || {
+    echo "Test failed"
+    exit 1
+}

tests/run.sh

@@ -2,6 +2,9 @@
 
 set -e
 
+trap "exit 1" INT
+trap "docker stack rm caddy_test" EXIT
+
 docker network create --driver overlay --attachable caddy_test || true
 
 for d in */
@@ -14,5 +17,3 @@ do
   echo ""
   (cd $d && . run.sh)
 done
-
-docker stack rm caddy_test