Requirements

PGSync has a small set of runtime dependencies. Versions shown are minimum supported.

Minimum versions

	Component	Version (min)	Notes
	Python	3.9+	Use a virtual environment for isolation.
	PostgreSQL	9.6+	Network access to the database required.
	Redis or Valkey	Redis 3.1.0+ or Valkey 7.2.0+	Choose one key-value store.
	Elasticsearch or OpenSearch	Elasticsearch 6.3.1+ or OpenSearch 1.3.7+	Choose one search backend.
	SQLAlchemy (Python)	1.3.4+	Installed as a Python dependency.

Choose your search backend

Elasticsearch OpenSearch

• Version 6.3.1+
• Ensure the cluster is reachable from where PGSync runs.

Quick check

curl -s http://localhost:9200 | jq .
# or
elasticsearch --version

• Version 1.3.7+
• Ensure the cluster is reachable from where PGSync runs.

Quick check

curl -s http://localhost:9200 | jq .
# or
opensearch --version

Quick checks

Verify the basics on the host that will run PGSync:

python3 --version
psql --version
redis-cli --version      # or: valkey-cli --version