quozd

- What do Etcd, Consul, and Zookeeper do?
  - Service Registration:
    - Host, port number, and sometimes authentication credentials, protocols, versions
      numbers, and/or environment details.
  - Service Discovery:
    - Ability for client application to query the central registry to learn of service location.
  - Consistent and durable general-purpose K/V store across distributed system.
    - Some solutions support this better than others.
    - Based on Paxos or some derivative (i.e. Raft) algorithm to quickly converge to a consistent state.
    - Centralized locking can be based on this K/V store.

quozd

def _create_config_hierarchy(config_cls: Type[TConfig], config_data: Mapping) -> TConfig:
    sig = signature(config_cls)

    cls_data_attributes = getmembers(config_cls, lambda a: isinstance(a, GenericDescriptor))
    if len(cls_data_attributes) != len(sig.parameters):
        raise TypeError(
            'Type {type_name} has invalid __init__.\n'
            'Init parameters count should equal to data descriptors count.\n'
            'Init parameters: [{init_params}], data descriptors: [{data_descriptors}]'.format(

quozd

#!/usr/bin/env bash

usage="Usage: $(basename "$0") region stack-name [aws-cli-opts]

where:
  region       - the AWS region
  stack-name   - the stack name
  aws-cli-opts - extra options passed directly to create-stack/update-stack
"