mirror of
https://github.com/uprightbass360/AzerothCore-RealmMaster.git
synced 2026-01-13 00:58:34 +00:00
Add graceful MySQL tmpfs sync on shutdown
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uprightbass360
@@ -11,66 +11,66 @@ if ! command -v "$ORIGINAL_ENTRYPOINT" >/dev/null 2>&1; then
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fi
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TARGET_SPEC="${MYSQL_RUNTIME_USER:-${CONTAINER_USER:-}}"
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if [ -z "${TARGET_SPEC:-}" ] || [ "${TARGET_SPEC}" = "0:0" ]; then
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exec "$ORIGINAL_ENTRYPOINT" "$@"
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fi
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if [[ "$TARGET_SPEC" != *:* ]]; then
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echo "mysql-entrypoint: Expected MYSQL_RUNTIME_USER/CONTAINER_USER in uid:gid form, got '${TARGET_SPEC}'" >&2
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exit 1
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fi
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IFS=':' read -r TARGET_UID TARGET_GID <<< "$TARGET_SPEC"
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if ! [[ "$TARGET_UID" =~ ^[0-9]+$ ]] || ! [[ "$TARGET_GID" =~ ^[0-9]+$ ]]; then
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echo "mysql-entrypoint: UID/GID must be numeric (received uid='${TARGET_UID}' gid='${TARGET_GID}')" >&2
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exit 1
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fi
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if ! id mysql >/dev/null 2>&1; then
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echo "mysql-entrypoint: mysql user not found in container" >&2
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exit 1
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fi
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current_uid="$(id -u mysql)"
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current_gid="$(id -g mysql)"
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# Adjust group if needed
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target_group_name=""
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if [ "$current_gid" != "$TARGET_GID" ]; then
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if groupmod -g "$TARGET_GID" mysql 2>/dev/null; then
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target_group_name="mysql"
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else
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existing_group="$(getent group "$TARGET_GID" | cut -d: -f1 || true)"
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if [ -z "$existing_group" ]; then
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existing_group="mysql-host"
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if ! getent group "$existing_group" >/dev/null 2>&1; then
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groupadd -g "$TARGET_GID" "$existing_group"
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fi
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fi
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usermod -g "$existing_group" mysql
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target_group_name="$existing_group"
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fi
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else
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target_group_name="$(getent group mysql | cut -d: -f1)"
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fi
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if [ -z "$target_group_name" ]; then
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target_group_name="$(getent group "$TARGET_GID" | cut -d: -f1 || true)"
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fi
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# Adjust user UID if needed
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if [ "$current_uid" != "$TARGET_UID" ]; then
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if getent passwd "$TARGET_UID" >/dev/null 2>&1 && [ "$(getent passwd "$TARGET_UID" | cut -d: -f1)" != "mysql" ]; then
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echo "mysql-entrypoint: UID ${TARGET_UID} already in use by $(getent passwd "$TARGET_UID" | cut -d: -f1)." >&2
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echo "mysql-entrypoint: Please choose a different CONTAINER_USER or adjust the image." >&2
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if [ -n "${TARGET_SPEC:-}" ] && [ "${TARGET_SPEC}" != "0:0" ]; then
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if [[ "$TARGET_SPEC" != *:* ]]; then
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echo "mysql-entrypoint: Expected MYSQL_RUNTIME_USER/CONTAINER_USER in uid:gid form, got '${TARGET_SPEC}'" >&2
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exit 1
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fi
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usermod -u "$TARGET_UID" mysql
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fi
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# Ensure group lookup after potential changes
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target_group_name="$(getent group "$TARGET_GID" | cut -d: -f1 || echo "$target_group_name")"
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IFS=':' read -r TARGET_UID TARGET_GID <<< "$TARGET_SPEC"
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if ! [[ "$TARGET_UID" =~ ^[0-9]+$ ]] || ! [[ "$TARGET_GID" =~ ^[0-9]+$ ]]; then
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echo "mysql-entrypoint: UID/GID must be numeric (received uid='${TARGET_UID}' gid='${TARGET_GID}')" >&2
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exit 1
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fi
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if ! id mysql >/dev/null 2>&1; then
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echo "mysql-entrypoint: mysql user not found in container" >&2
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exit 1
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fi
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current_uid="$(id -u mysql)"
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current_gid="$(id -g mysql)"
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# Adjust group if needed
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if [ "$current_gid" != "$TARGET_GID" ]; then
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if groupmod -g "$TARGET_GID" mysql 2>/dev/null; then
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target_group_name="mysql"
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else
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existing_group="$(getent group "$TARGET_GID" | cut -d: -f1 || true)"
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if [ -z "$existing_group" ]; then
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existing_group="mysql-host"
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if ! getent group "$existing_group" >/dev/null 2>&1; then
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groupadd -g "$TARGET_GID" "$existing_group"
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fi
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fi
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usermod -g "$existing_group" mysql
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target_group_name="$existing_group"
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fi
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else
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target_group_name="$(getent group mysql | cut -d: -f1)"
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fi
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if [ -z "$target_group_name" ]; then
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target_group_name="$(getent group "$TARGET_GID" | cut -d: -f1 || true)"
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fi
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# Adjust user UID if needed
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if [ "$current_uid" != "$TARGET_UID" ]; then
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if getent passwd "$TARGET_UID" >/dev/null 2>&1 && [ "$(getent passwd "$TARGET_UID" | cut -d: -f1)" != "mysql" ]; then
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echo "mysql-entrypoint: UID ${TARGET_UID} already in use by $(getent passwd "$TARGET_UID" | cut -d: -f1)." >&2
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echo "mysql-entrypoint: Please choose a different CONTAINER_USER or adjust the image." >&2
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exit 1
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fi
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usermod -u "$TARGET_UID" mysql
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fi
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# Ensure group lookup after potential changes
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target_group_name="$(getent group "$TARGET_GID" | cut -d: -f1 || echo "$target_group_name")"
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else
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target_group_name="$(getent group mysql | cut -d: -f1 || echo mysql)"
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fi
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# Update ownership on relevant directories if they exist
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for path in /var/lib/mysql-runtime /var/lib/mysql /var/lib/mysql-persistent /backups; do
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@@ -79,6 +79,91 @@ for path in /var/lib/mysql-runtime /var/lib/mysql /var/lib/mysql-persistent /bac
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fi
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done
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# Minimal fix: Restore data from persistent storage on startup and sync on shutdown only
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RUNTIME_DIR="/var/lib/mysql-runtime"
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PERSISTENT_DIR="/var/lib/mysql-persistent"
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sync_datadir() {
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if [ ! -d "$RUNTIME_DIR" ]; then
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echo "⚠️ Runtime directory not found: $RUNTIME_DIR"
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return 1
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fi
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if [ ! -d "$PERSISTENT_DIR" ]; then
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echo "⚠️ Persistent directory not found: $PERSISTENT_DIR"
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return 1
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fi
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user_schema_count="$(find "$RUNTIME_DIR" -mindepth 1 -maxdepth 1 -type d \
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! -name mysql \
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! -name performance_schema \
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! -name information_schema \
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! -name sys \
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! -name "#innodb_temp" \
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! -name "#innodb_redo" 2>/dev/null | wc -l | tr -d ' ')"
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if [ "${user_schema_count:-0}" -eq 0 ]; then
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echo "⚠️ Runtime data appears empty (system schemas only); skipping sync"
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return 0
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fi
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echo "📦 Syncing MySQL data to persistent storage..."
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if command -v rsync >/dev/null 2>&1; then
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rsync -a --delete \
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--exclude='.restore-completed' \
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--exclude='.restore-failed' \
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--exclude='.import-completed' \
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--exclude='backup.sql' \
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"$RUNTIME_DIR"/ "$PERSISTENT_DIR"/
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else
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# Mirror the runtime state while preserving marker files.
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find "$PERSISTENT_DIR" -mindepth 1 -maxdepth 1 \
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! -name ".restore-completed" \
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! -name ".restore-failed" \
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! -name ".import-completed" \
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! -name "backup.sql" \
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-exec rm -rf {} + 2>/dev/null || true
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cp -a "$RUNTIME_DIR"/. "$PERSISTENT_DIR"/
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fi
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chown -R mysql:"$target_group_name" "$PERSISTENT_DIR"
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echo "✅ Sync completed"
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}
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handle_shutdown() {
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echo "🔻 Shutdown signal received"
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if command -v mysqladmin >/dev/null 2>&1; then
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if mysqladmin -h localhost -u root -p"${MYSQL_ROOT_PASSWORD:-}" shutdown 2>/dev/null; then
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echo "✅ MySQL shutdown complete"
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sync_datadir || true
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else
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echo "⚠️ mysqladmin shutdown failed; skipping sync to avoid corruption"
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fi
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else
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echo "⚠️ mysqladmin not found; skipping sync"
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fi
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if [ -n "${child_pid:-}" ] && kill -0 "$child_pid" 2>/dev/null; then
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wait "$child_pid" || true
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fi
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exit 0
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}
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# Simple startup restoration
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if [ -d "$PERSISTENT_DIR" ]; then
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# Check for MySQL data files (exclude marker files starting with .)
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if find "$PERSISTENT_DIR" -maxdepth 1 -name "*" ! -name ".*" ! -path "$PERSISTENT_DIR" | grep -q .; then
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if [ -d "$RUNTIME_DIR" ] && [ -z "$(ls -A "$RUNTIME_DIR" 2>/dev/null)" ]; then
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echo "🔄 Restoring MySQL data from persistent storage..."
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cp -a "$PERSISTENT_DIR"/* "$RUNTIME_DIR/" 2>/dev/null || true
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chown -R mysql:"$target_group_name" "$RUNTIME_DIR"
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echo "✅ Data restored from persistent storage"
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fi
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fi
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fi
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# Simple approach: restore on startup only
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# Data loss window exists but prevents complete loss on restart
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trap handle_shutdown TERM INT
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disable_binlog="${MYSQL_DISABLE_BINLOG:-}"
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if [ "${disable_binlog}" = "1" ]; then
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add_skip_flag=1
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@@ -93,4 +178,6 @@ if [ "${disable_binlog}" = "1" ]; then
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fi
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fi
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exec "$ORIGINAL_ENTRYPOINT" "$@"
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"$ORIGINAL_ENTRYPOINT" "$@" &
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child_pid=$!
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wait "$child_pid"
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