PostgresQL

Create a read-only role

Snaplet connects to your PostgresQL database in order to create snapshots. We recommend that you give us read-only access to your database, and that you restrict connection to a specific set of IP addresses.

Connect to your database and run the following SQL statements. These creates a snaplet_readonly user with the password a very good password and gives them the snaplet_read_all_data role.

PostgresQL v14 includes a pg_read_all_data role. Run SELECT version() in PostgresQL to determine your version.

danger

Change the username and the password!

PostgresQL v14

SELECT version();
-- Create a "snaplet_readonly" user and associate the "pg_read_all_data" role.
-- We give the user BYPASSRLS privileges in order to introspect the db structure.
CREATE USER snaplet_readonly WITH PASSWORD 'a very good password' BYPASSRLS;
GRANT pg_read_all_data TO snaplet_readonly;

PostgresQL v13 and below

SELECT version();
-- Create a "snaplet_read_all_data" role, find all the user generated schemas, 
-- and associate the correct grants.
CREATE ROLE snaplet_read_all_data;
DO $do$
DECLARE
    sch text;
BEGIN
    FOR sch IN SELECT schema_name FROM information_schema.schemata WHERE schema_name NOT LIKE 'pg_%' AND schema_name != 'information_schema'
    LOOP
        EXECUTE format($$ GRANT USAGE ON SCHEMA %I TO snaplet_read_all_data $$, sch);
        EXECUTE format($$ GRANT SELECT ON ALL TABLES IN SCHEMA %I TO snaplet_read_all_data $$, sch);
        EXECUTE format($$ GRANT SELECT ON ALL SEQUENCES IN SCHEMA %I TO snaplet_read_all_data $$, sch);
        EXECUTE format($$ ALTER DEFAULT PRIVILEGES IN SCHEMA %I GRANT SELECT ON TABLES TO snaplet_read_all_data $$, sch);
        EXECUTE format($$ ALTER DEFAULT PRIVILEGES IN SCHEMA %I GRANT SELECT ON SEQUENCES TO snaplet_read_all_data $$, sch);
    END LOOP;
END;
$do$;
-- Create a "snaplet_readonly" user and associate the "snaplet_read_all_data" role.
-- We give the user BYPASSRLS privileges in order to introspect the db structure.
CREATE USER snaplet_readonly WITH PASSWORD 'a very good password' BYPASSRLS;
GRANT snaplet_read_all_data TO snaplet_readonly;

Grant IP address access

Snaplet uses 3.67.57.100, 3.68.126.236 and 35.158.181.77 to connect to your database. It's a good idea to restrict all traffic to PostgresQL, and only grant access where it's absolutely required.

Self-Signed Certificates

To make Snaplet work with servers using self-signed certificates. Please add sslmode=require to the database connection string:

SNAPLET_DATABASE_URL='postgresql://<user>:<password>@<host>:<port>/<database>?sslmode=required&ssl=true&sslmode=require' snaplet snapshot restore

During the snapshot capture process, use NODE_TLS_REJECT_UNAUTHORIZED=0:

NODE_TLS_REJECT_UNAUTHORIZED=0 SNAPLET_DATABASE_URL='postgresql://<user>:<password>@<host>:<port>/<database>?sslmode=required&ssl=true&sslmode=require' snaplet snapshot capture

Example: