ci: deploy-container.sh — swap/rollback with dry-run tests

2026-04-25 02:41:51 +03:00
parent f97cb72e9e
commit cb494a4290
2 changed files with 131 additions and 0 deletions
@@ -0,0 +1,78 @@
+#!/usr/bin/env bash
+# deploy-container.sh — swap or rollback the flights-web container on the host.
+#
+# Usage: deploy-container.sh [--dry-run] <swap|rollback>
+#
+# `swap`     — assumes the new image is tagged flights-web:${GITHUB_SHA}.
+#              Tags :current → :previous, :sha → :current, restarts container.
+# `rollback` — runs flights-web:previous in place of :current, repoints :current.
+#
+# Env:
+#   GITHUB_SHA          (required for swap)
+#   FLIGHTS_WEB_PORT    (default 8081 — host port that nginx proxies to)
+#   IMAGE_NAME          (default flights-web — set this to point at a registry later)
+set -euo pipefail
+
+DRY_RUN=0
+if [ "${1:-}" = "--dry-run" ]; then
+  DRY_RUN=1
+  shift
+fi
+
+CMD="${1:-}"
+PORT="${FLIGHTS_WEB_PORT:-8081}"
+IMAGE="${IMAGE_NAME:-flights-web}"
+
+run() {
+  if [ "$DRY_RUN" -eq 1 ]; then
+    printf 'docker %s\n' "$*"
+  else
+    docker "$@"
+  fi
+}
+
+run_or_skip() {
+  # Same as run, but doesn't fail in real mode if the docker call fails.
+  if [ "$DRY_RUN" -eq 1 ]; then
+    printf 'docker %s\n' "$*"
+  else
+    docker "$@" || true
+  fi
+}
+
+case "$CMD" in
+  swap)
+    : "${GITHUB_SHA:?GITHUB_SHA required for swap}"
+    SHORT_SHA="${GITHUB_SHA:0:7}"
+    # 1. Tag the currently-live image as :previous (skip if first deploy).
+    if [ "$DRY_RUN" -eq 1 ] || docker image inspect "${IMAGE}:current" >/dev/null 2>&1; then
+      run tag "${IMAGE}:current" "${IMAGE}:previous"
+    fi
+    # 2. Tag the new SHA as :current.
+    run tag "${IMAGE}:${SHORT_SHA}" "${IMAGE}:current"
+    # 3. Stop + remove existing container if present.
+    run_or_skip stop flights-web
+    run_or_skip rm flights-web
+    # 4. Run new container.
+    run run -d --name flights-web --restart unless-stopped \
+      -p "127.0.0.1:${PORT}:8080" \
+      "${IMAGE}:current"
+    ;;
+  rollback)
+    if [ "$DRY_RUN" -eq 0 ] && ! docker image inspect "${IMAGE}:previous" >/dev/null 2>&1; then
+      echo "fatal: ${IMAGE}:previous not found — cannot rollback" >&2
+      exit 1
+    fi
+    run_or_skip stop flights-web
+    run_or_skip rm flights-web
+    run run -d --name flights-web --restart unless-stopped \
+      -p "127.0.0.1:${PORT}:8080" \
+      "${IMAGE}:previous"
+    # Repoint :current to :previous so subsequent swaps have a sane baseline.
+    run tag "${IMAGE}:previous" "${IMAGE}:current"
+    ;;
+  *)
+    echo "usage: $0 [--dry-run] <swap|rollback>" >&2
+    exit 2
+    ;;
+esac