adds agent test

Dockerfile

@@ -26,9 +26,9 @@ FROM --platform=$BUILDPLATFORM golang:1.23.3-alpine AS builder
 
 # install gRPC dependencies
 RUN apk add --no-cache ca-certificates protoc protobuf-dev\
-    && mkdir /dozzle \
-    && go install google.golang.org/protobuf/cmd/protoc-gen-go@latest \
-    && go install google.golang.org/grpc/cmd/protoc-gen-go-grpc@latest
+  && mkdir /dozzle \
+  && go install google.golang.org/protobuf/cmd/protoc-gen-go@latest \
+  && go install google.golang.org/grpc/cmd/protoc-gen-go-grpc@latest
 
 WORKDIR /dozzle
 

examples/docker.swarm.yml

@@ -4,7 +4,7 @@ services:
     environment:
       - DOZZLE_LEVEL=debug
       - DOZZLE_MODE=swarm
-      - DOZZLE_REMOTE_AGENT=198.19.248.6:7070
+      - DOZZLE_REMOTE_AGENT=198.19.248.6:7007
     volumes:
       - /var/run/docker.sock:/var/run/docker.sock
     ports:

internal/support/cli/args.go

@@ -31,6 +31,7 @@ type Args struct {
 	Healthcheck     *HealthcheckCmd     `arg:"subcommand:healthcheck" help:"checks if the server is running"`
 	Generate        *GenerateCmd        `arg:"subcommand:generate" help:"generates a configuration file for simple auth"`
 	Agent           *AgentCmd           `arg:"subcommand:agent" help:"starts the agent"`
+	AgentTest       *AgentTestCmd       `arg:"subcommand:agent-test" help:"tests an agent"`
 }
 
 type HealthcheckCmd struct {
@@ -40,6 +41,10 @@ type AgentCmd struct {
 	Addr string `arg:"env:DOZZLE_AGENT_ADDR" default:":7007" help:"sets the host:port to bind for the agent"`
 }
 
+type AgentTestCmd struct {
+	Address string `arg:"positional"`
+}
+
 type GenerateCmd struct {
 	Username string `arg:"positional"`
 	Password string `arg:"--password, -p" help:"sets the password for the user"`

main.go

@@ -126,6 +126,24 @@ func main() {
 			if _, err := os.Stdout.Write(buffer.Bytes()); err != nil {
 				log.Fatal().Err(err).Msg("Failed to write to stdout")
 			}
+
+		case *cli.AgentTestCmd:
+			certs, err := cli.ReadCertificates(certs)
+			if err != nil {
+				log.Fatal().Err(err).Msg("Could not read certificates")
+			}
+
+			log.Info().Str("endpoint", args.AgentTest.Address).Msg("Connecting to agent")
+
+			agent, err := agent.NewClient(args.AgentTest.Address, certs)
+			ctx, cancel := context.WithTimeout(context.Background(), args.Timeout)
+			defer cancel()
+			host, err := agent.Host(ctx)
+			if err != nil {
+				log.Fatal().Err(err).Str("endpoint", args.AgentTest.Address).Msg("error fetching host info for agent")
+			}
+
+			log.Info().Str("endpoint", args.AgentTest.Address).Str("version", host.AgentVersion).Str("name", host.Name).Str("id", host.ID).Msg("Successfully connected to agent")
 		}
 
 		os.Exit(0)