初始化

2026-06-25 09:41:16 +08:00
commit 34001a4296
10 changed files with 689 additions and 0 deletions
@@ -0,0 +1,37 @@
+#!/bin/bash
+set -e
+
+# PostgreSQL standby bootstrap entrypoint
+# If data dir is empty, pull base backup from primary, then hand off to postgres entrypoint
+
+PRIMARY_HOST="${PG_PRIMARY_HOST:-host1}"
+PRIMARY_PORT="${PG_PRIMARY_PORT:-5432}"
+REPL_PASSWORD="${REPL_PASSWORD:-Bjang09@686-Repl}"
+PGDATA="/var/lib/postgresql/data"
+
+if [ ! -s "$PGDATA/PG_VERSION" ]; then
+  echo "[standby] Data directory empty, bootstrapping from primary $PRIMARY_HOST:$PRIMARY_PORT"
+
+  # Wait for primary to accept connections
+  for i in $(seq 1 30); do
+    if PGPASSWORD="$REPL_PASSWORD" pg_isready -h "$PRIMARY_HOST" -p "$PRIMARY_PORT" -U replicator >/dev/null 2>&1; then
+      break
+    fi
+    echo "[standby] Waiting for primary to be ready (attempt $i/30)..."
+    sleep 2
+  done
+
+  # Pull base backup from primary
+  echo "[standby] Running pg_basebackup..."
+  PGPASSWORD="$REPL_PASSWORD" pg_basebackup -h "$PRIMARY_HOST" -p "$PRIMARY_PORT" \
+    -U replicator -D "$PGDATA" -P -R \
+    -S replication_slot_slave --checkpoint=fast --wal-method=stream
+
+  # Ensure standby signal file exists
+  touch "$PGDATA/standby.signal"
+
+  echo "[standby] Bootstrap complete, starting standby..."
+fi
+
+# Hand off to the standard postgres entrypoint
+exec /usr/local/bin/docker-entrypoint.sh "$@"