Édition du docker-compose.yml depuis la page d'un conteneur

Vérification par docker compose config avant écriture, application avec
docker compose up -d et retour à la version précédente en cas d'échec.
Historique des versions par fichier. Le Caddyfile et le compose gardent
un retour à la ligne final.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

api/app/services/caddy_service.ts

@@ -2,6 +2,7 @@ import { readFile, writeFile } from 'node:fs/promises'
 import vpsConfig from '#config/vps'
 import dockerService from '#services/docker_service'
 import CaddyfileVersion from '#models/caddyfile_version'
+import { toFileContent } from '#services/file_content'
 
 export interface CaddySite {
   /**
@@ -170,8 +171,8 @@ class CaddyService {
     meta: { username: string | null; reason: string }
   ): Promise<ReloadResult> {
     const previous = await this.read()
-    const normalized = content.replace(/\r\n/g, '\n')
-    if (normalized === previous) return { ok: true, output: 'Aucun changement.' }
+    const normalized = toFileContent(content)
+    if (normalized === toFileContent(previous)) return { ok: true, output: 'Aucun changement.' }
 
     await this.#write(normalized)
 

api/app/services/compose_service.ts

@@ -0,0 +1,314 @@
+import { spawn } from 'node:child_process'
+import { readFile, realpath, writeFile } from 'node:fs/promises'
+import { isAbsolute, relative, resolve, sep } from 'node:path'
+import vpsConfig from '#config/vps'
+import UserError from '#exceptions/user_error'
+import ComposeVersion from '#models/compose_version'
+import dockerService from '#services/docker_service'
+import { toFileContent } from '#services/file_content'
+import jobRunner, { cleanEnv, type JobContext, type JobMeta } from '#services/job_runner'
+
+export interface ComposeTarget {
+  project: string
+  service: string | null
+  workingDir: string
+  file: string
+
+  /**
+   * Containers of the same compose project: "up -d" may recreate them all.
+   */
+  containers: string[]
+  editable: boolean
+
+  /**
+   * Why the file can only be read.
+   */
+  readOnlyReason: string | null
+}
+
+export interface ComposeCheck {
+  ok: boolean
+  output: string
+}
+
+export type ComposeSaveResult =
+  | { ok: false; output: string }
+  | { ok: true; changed: boolean; output: string; jobId: number | null }
+
+/**
+ * Versions kept for each file.
+ */
+const KEPT_VERSIONS = 30
+
+/**
+ * Reads and edits the docker-compose.yml of a container, found with the
+ * labels "docker compose" puts on the containers it creates.
+ */
+class ComposeService {
+  async locate(containerId: string): Promise<ComposeTarget> {
+    const info = await dockerService.docker.getContainer(containerId).inspect()
+    const labels = info.Config.Labels ?? {}
+    const project = labels['com.docker.compose.project']
+    const workingDir = labels['com.docker.compose.project.working_dir']
+    const files = (labels['com.docker.compose.project.config_files'] ?? '')
+      .split(',')
+      .map((file) => file.trim())
+      .filter(Boolean)
+
+    if (!project || !workingDir || files.length === 0) {
+      throw new UserError(
+        'Ce conteneur n’a pas été créé avec docker compose : il n’a pas de fichier à modifier.',
+        404
+      )
+    }
+
+    const file = resolve(workingDir, files[0])
+    if (!isInside(vpsConfig.srvRoot, file)) {
+      throw new UserError(
+        `Le fichier ${file} est en dehors de ${vpsConfig.srvRoot} : le tableau de bord n’y a pas accès.`,
+        404
+      )
+    }
+    /**
+     * Same check once the symbolic links are resolved.
+     */
+    const real = await Promise.all([realpath(vpsConfig.srvRoot), realpath(file)]).catch(() => null)
+    if (!real || !isInside(real[0], real[1])) {
+      throw new UserError(`Le fichier ${file} est introuvable.`, 404)
+    }
+
+    let readOnlyReason: string | null = null
+    if (files.length > 1) {
+      readOnlyReason = 'Ce projet combine plusieurs fichiers compose : modifie-les en SSH.'
+    } else if (await dockerService.isSelf(info.Id)) {
+      readOnlyReason =
+        'Le compose du tableau de bord se modifie en SSH : une erreur ici couperait l’accès au tableau de bord.'
+    }
+
+    const containers = await dockerService.list().catch(() => [])
+    return {
+      project,
+      service: labels['com.docker.compose.service'] ?? null,
+      workingDir,
+      file,
+      containers: containers
+        .filter((container) => container.composeProject === project)
+        .map((container) => container.name),
+      editable: readOnlyReason === null,
+      readOnlyReason,
+    }
+  }
+
+  async show(containerId: string) {
+    const target = await this.locate(containerId)
+    const [content, versions] = await Promise.all([
+      readFile(target.file, 'utf8'),
+      ComposeVersion.query()
+        .select('id', 'username', 'reason', 'created_at')
+        .where('path', target.file)
+        .orderBy('id', 'desc'),
+    ])
+
+    return {
+      ...target,
+      content,
+      versions: versions.map((version) => ({
+        id: version.id,
+        username: version.username,
+        reason: version.reason,
+        createdAt: version.createdAt.toISO(),
+      })),
+    }
+  }
+
+  async version(containerId: string, versionId: number) {
+    const target = await this.locate(containerId)
+    const version = await ComposeVersion.query()
+      .where('id', versionId)
+      .where('path', target.file)
+      .first()
+    if (!version) throw new UserError('Version introuvable.', 404)
+    return {
+      id: version.id,
+      username: version.username,
+      reason: version.reason,
+      createdAt: version.createdAt.toISO(),
+      content: version.content,
+    }
+  }
+
+  /**
+   * "docker compose config" on the new content, without writing it: catches
+   * YAML errors, unknown keys and missing env files.
+   */
+  async check(target: ComposeTarget, content: string): Promise<ComposeCheck> {
+    const result = await runWithInput(
+      'docker',
+      [...composeArgs(target, '-'), 'config', '--quiet'],
+      { cwd: target.workingDir, input: content, timeoutMs: 30_000 }
+    )
+    return { ok: result.code === 0, output: readableComposeOutput(result.output) }
+  }
+
+  /**
+   * Checks and writes the new file, then runs "docker compose up -d" when
+   * asked. When "up" fails, the previous file is put back and started again.
+   */
+  async save(
+    target: ComposeTarget,
+    content: string,
+    options: Omit<JobMeta, 'action' | 'target' | 'lockKey'> & { reason: string; apply: boolean }
+  ): Promise<ComposeSaveResult> {
+    if (!target.editable) throw new UserError(target.readOnlyReason ?? 'Fichier non modifiable.')
+
+    const lockKey = `project:${target.workingDir}`
+    if (jobRunner.isLocked(lockKey)) {
+      throw new UserError('Une action est déjà en cours sur ce projet, attends la fin.', 409)
+    }
+
+    const next = toFileContent(content)
+    const previous = await readFile(target.file, 'utf8')
+    const changed = next !== toFileContent(previous)
+
+    if (!changed && !options.apply)
+      return { ok: true, changed, output: 'Aucun changement.', jobId: null }
+
+    const check = await this.check(target, next)
+    if (!check.ok) return { ok: false, output: check.output }
+
+    if (changed) {
+      await ComposeVersion.create({
+        path: target.file,
+        content: previous,
+        username: options.username,
+        reason: options.reason,
+      })
+      await this.#write(target.file, next)
+      await this.#pruneVersions(target.file)
+    }
+
+    if (!options.apply) return { ok: true, changed, output: check.output, jobId: null }
+
+    const job = await jobRunner.start(
+      {
+        username: options.username,
+        ip: options.ip,
+        action: changed
+          ? 'Modification du docker-compose.yml'
+          : 'Application du docker-compose.yml',
+        target: target.file,
+        lockKey,
+      },
+      async (ctx) => {
+        if (check.output) ctx.log(check.output)
+        ctx.log(
+          changed
+            ? 'Fichier enregistré (la version précédente est dans l’historique).'
+            : 'Fichier inchangé : application de la version actuelle.'
+        )
+
+        try {
+          await this.#up(ctx, target)
+        } catch (error) {
+          if (!changed) throw error
+          ctx.log('Échec : remise en place de la version précédente…', 'err')
+          await this.#write(target.file, previous)
+          await this.#up(ctx, target).catch((rollbackError: Error) =>
+            ctx.log(
+              `La version précédente n’a pas pu être relancée : ${rollbackError.message}`,
+              'err'
+            )
+          )
+          throw new Error(
+            'La nouvelle version n’a pas pu être appliquée : la version précédente a été remise en place.'
+          )
+        }
+      }
+    )
+
+    return { ok: true, changed, output: check.output, jobId: job.id }
+  }
+
+  #up(ctx: JobContext, target: ComposeTarget) {
+    return ctx.run('docker', [...composeArgs(target, target.file), 'up', '-d'], {
+      cwd: target.workingDir,
+    })
+  }
+
+  /**
+   * Writes in place, like the Caddyfile: the file may be mounted on its own.
+   */
+  #write(file: string, content: string) {
+    return writeFile(file, content, 'utf8')
+  }
+
+  async #pruneVersions(file: string) {
+    const kept = await ComposeVersion.query()
+      .select('id')
+      .where('path', file)
+      .orderBy('id', 'desc')
+      .limit(KEPT_VERSIONS)
+    if (kept.length < KEPT_VERSIONS) return
+    await ComposeVersion.query().where('path', file).where('id', '<', kept.at(-1)!.id).delete()
+  }
+}
+
+/**
+ * Same project name and folder as the existing containers, so that
+ * "up -d" updates them instead of creating new ones.
+ */
+function composeArgs(target: ComposeTarget, file: string) {
+  return ['compose', '-p', target.project, '--project-directory', target.workingDir, '-f', file]
+}
+
+function isInside(root: string, path: string) {
+  const rel = relative(root, path)
+  return rel !== '' && !isAbsolute(rel) && rel.split(sep)[0] !== '..'
+}
+
+/**
+ * "time=… level=warning msg="…"" -> "Avertissement : …".
+ */
+function readableComposeOutput(output: string) {
+  return output
+    .split(/\r?\n/)
+    .filter((line) => line.trim())
+    .map((line) => {
+      const match = /level=(\w+)\s+msg="((?:[^"\\]|\\.)*)"/.exec(line)
+      if (!match) return line
+      const text = match[2].replace(/\\"/g, '"')
+      return match[1] === 'warning' ? `Avertissement : ${text}` : text
+    })
+    .join('\n')
+}
+
+function runWithInput(
+  command: string,
+  args: string[],
+  options: { cwd: string; input: string; timeoutMs: number }
+) {
+  return new Promise<{ code: number | null; output: string }>((done) => {
+    const child = spawn(command, args, {
+      cwd: options.cwd,
+      env: cleanEnv(),
+      stdio: ['pipe', 'pipe', 'pipe'],
+    })
+    let output = ''
+    const timer = setTimeout(() => child.kill('SIGKILL'), options.timeoutMs)
+    child.stdout.on('data', (chunk) => (output += chunk))
+    child.stderr.on('data', (chunk) => (output += chunk))
+    child.on('error', (error) => {
+      clearTimeout(timer)
+      done({ code: null, output: `Impossible de lancer "${command}" : ${error.message}` })
+    })
+    child.on('close', (code) => {
+      clearTimeout(timer)
+      done({ code, output })
+    })
+    child.stdin.on('error', () => {})
+    child.stdin.end(options.input)
+  })
+}
+
+const composeService = new ComposeService()
+export default composeService

api/app/services/file_content.ts

@@ -0,0 +1,8 @@
+/**
+ * Content written to a configuration file edited from the dashboard:
+ * "\n" line breaks and a final line break (the request body comes trimmed).
+ */
+export function toFileContent(content: string) {
+  const normalized = content.replace(/\r\n/g, '\n')
+  return normalized.endsWith('\n') ? normalized : `${normalized}\n`
+}