Run ParallelSSHClient on 8 servers. One server is having port 422. All other servers on port 22

[sreenik250]

I want to execute ParallelSSHClient on 8 servers. One server is having port 422. All other servers on port 22.
How to achieve this? If possible example please.

[sreenik250]

We have stored the IP address in PostgreSQL database. How to store the HostConfig data in PostgreSQL.

[pkittenis]

Hi there,

Have a look at per-host configuration documentation.

from pssh.config import HostConfig

hosts = ['localhost', 'localhost']
host_config = [
    HostConfig(port=422, user='user1',
               password='pass', private_key='my_pkey.pem'),
    HostConfig(user='user2',
               password='pass', private_key='my_other_key.pem'),
]

client = ParallelSSHClient(hosts, host_config=host_config)
client.run_command('uname')
<..>

Port can be omitted from HostConfig unless it's a non-default port. Default port is 22. If there is no need to override any configuration for a server an empty HostConfig may be used, eg:

host_config = [
    HostConfig(port=422),
    HostConfig(),
]

Overrides port to 422 for only the first host. Second host gets ParallelSSHClient configuration.

Storing HostConfig data elsewhere is out of scope for the library. There are many ways to do that, up to developers.

The library uses HostConfig entries for per-host configuration. How/where/if they are stored is up to developers.