SRV resolver

Helper to get record from SRV address according to RFC2782.

Features

• support of record weights and priorities
• check service availability at specific port
• random record selector
• cache with ttl support

Install

The package can be installed simply by using pip:

pip install srvresolver

Example

from srvresolver.srv_resolver import SRVResolver

# get all records
SRVResolver.resolve('_service._tcp.example.com')

# get one random record with working connection 
SRVResolver.resolve_random('_service._tcp.example.com')

# get first available server
SRVResolver.resolve_first('_service._tcp.example.com')

Adds

Resolver with DNS cache

This one uses cache implemented in dnspython module.

from srvresolver.srv_resolver_cached import SRVResolverCached

# get all records
SRVResolverCached.resolve('_service._tcp.example.com')
# same but don't do dns request, load from cache if not expired
SRVResolverCached.resolve('_service._tcp.example.com')

Postgres SRV record resolver

Extract postgres records from SRV and check whether master or slave. Requires psycopg2

from srvresolver.postgres_resolver import PostgresResolver

# get random working slave record
PostgresResolver.get_slave('_postgresql._tcp.example.com', username, password)

# get random working master record
PostgresResolver.get_master('_postgresql._tcp.example.com', username, password)