service.go
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//go:build cgo
package commands
import (
"fmt"
"os"
"os/exec"
"path/filepath"
"strings"
)
const serviceUsage = `Manage services in Congo Dev
Usage:
congo service <subcommand>
Subcommands:
list List services (JSON)
deploy <repo> [name] Build and deploy a service from a repo
stop <repo> <name> Stop a service
start <repo> <name> Start a stopped service
status <repo> <name> Check service status
`
func Service() {
if len(os.Args) < 3 {
fmt.Print(serviceUsage)
os.Exit(1)
}
switch os.Args[2] {
case "list":
// List running containers on the internal network
out, _ := exec.Command("docker", "ps", "--format", "{{json .}}").Output()
fmt.Println("[")
lines := strings.Split(strings.TrimSpace(string(out)), "\n")
for i, line := range lines {
if line == "" { continue }
if i > 0 { fmt.Println(",") }
fmt.Print(line)
}
fmt.Println("\n]")
case "deploy":
serviceDeploy()
case "stop":
serviceControl("stop")
case "start":
serviceControl("start")
case "status":
serviceStatus()
default:
fmt.Fprintf(os.Stderr, "unknown service subcommand %q\n", os.Args[2])
os.Exit(1)
}
}
func serviceDeploy() {
if len(os.Args) < 4 {
fmt.Fprintln(os.Stderr, "usage: congo service deploy <repo> [service-name]")
os.Exit(1)
}
repoName := os.Args[3]
serviceName := "app"
if len(os.Args) > 4 {
serviceName = os.Args[4]
}
repoPath := "/home/coder/repos/" + repoName
if _, err := os.Stat(repoPath); os.IsNotExist(err) {
fmt.Fprintf(os.Stderr, "repo %s not found at %s\n", repoName, repoPath)
os.Exit(1)
}
imageName := fmt.Sprintf("congo-%s-%s:latest", repoName, serviceName)
containerName := fmt.Sprintf("%s-%s", repoName, serviceName)
// Build Docker image
fmt.Printf("Building %s...\n", imageName)
buildCmd := exec.Command("docker", "build", "-t", imageName, "-f",
filepath.Join(repoPath, "Dockerfile"), repoPath)
buildCmd.Stdout = os.Stdout
buildCmd.Stderr = os.Stderr
if err := buildCmd.Run(); err != nil {
fmt.Fprintf(os.Stderr, "docker build failed: %v\n", err)
os.Exit(1)
}
// Stop existing container
exec.Command("docker", "stop", containerName).Run()
exec.Command("docker", "rm", containerName).Run()
// Run container
fmt.Printf("Starting %s...\n", containerName)
runCmd := exec.Command("docker", "run", "-d",
"--name", containerName,
"--network", "internal",
"--restart", "unless-stopped",
"-e", "PORT=5000",
"-e", "ENV=production",
imageName)
out, err := runCmd.CombinedOutput()
if err != nil {
fmt.Fprintf(os.Stderr, "docker run failed: %s\n", strings.TrimSpace(string(out)))
os.Exit(1)
}
id := strings.TrimSpace(string(out))
if len(id) > 12 {
id = id[:12]
}
fmt.Printf("Deployed %s (%s)\n", containerName, id)
}
func serviceControl(action string) {
if len(os.Args) < 5 {
fmt.Fprintf(os.Stderr, "usage: congo service %s <repo> <name>\n", action)
os.Exit(1)
}
containerName := fmt.Sprintf("%s-%s", os.Args[3], os.Args[4])
var cmd *exec.Cmd
switch action {
case "stop":
cmd = exec.Command("docker", "stop", containerName)
case "start":
cmd = exec.Command("docker", "start", containerName)
default:
fmt.Fprintf(os.Stderr, "unknown action %s\n", action)
os.Exit(1)
}
if err := cmd.Run(); err != nil {
fmt.Fprintf(os.Stderr, "%s failed: %v\n", action, err)
os.Exit(1)
}
fmt.Printf("%s %s\n", action, containerName)
}
func serviceStatus() {
if len(os.Args) < 5 {
fmt.Fprintln(os.Stderr, "usage: congo service status <repo> <name>")
os.Exit(1)
}
containerName := fmt.Sprintf("%s-%s", os.Args[3], os.Args[4])
out, err := exec.Command("docker", "inspect", "--format",
"{{.State.Status}} ({{.State.Health.Status}})", containerName).Output()
if err != nil {
fmt.Println("not found")
os.Exit(1)
}
fmt.Print(strings.TrimSpace(string(out)))
}