patroni.request module

Facilities for handling communication with Patroni’s REST API.

class patroni.request.HTTPSConnectionPool(host, port=None, strict=False, timeout=<object object>, maxsize=1, block=False, headers=None, retries=None, _proxy=None, _proxy_headers=None, key_file=None, cert_file=None, cert_reqs='CERT_REQUIRED', key_password=None, ca_certs='/etc/ssl/certs/ca-certificates.crt', ssl_version=None, assert_hostname=None, assert_fingerprint=None, ca_cert_dir=None, **conn_kw)

Bases: urllib3.connectionpool.HTTPSConnectionPool

_validate_conn(*args, **kwargs) → None

Override parent method to silence warnings about requests without certificate verification enabled.

class patroni.request.PatroniPoolManager(*args, **kwargs)

Bases: urllib3.poolmanager.PoolManager

__init__(*args, **kwargs) → None

Initialize self. See help(type(self)) for accurate signature.

class patroni.request.PatroniRequest(config: Union[patroni.config.Config, Dict[str, Any]], insecure: Optional[bool] = None)

Bases: object

Wrapper for performing requests to Patroni’s REST API.

Prepares the request manager with the configured settings before performing the request.

__init__(config: Union[patroni.config.Config, Dict[str, Any]], insecure: Optional[bool] = None) → None

Create a new PatroniRequest instance with given config.

Parameters:
  • config – Patroni YAML configuration.
  • insecure –

    how to deal with SSL certs verification:

    • If True it will perform REST API requests without verifying SSL certs; or
    • If False it will perform REST API requests and verify SSL certs; or
    • If None it will behave according to the value of ctl.insecure configuration; or
    • If none of the above applies, then it falls back to False.
_apply_pool_param(param: str, value: Any) → None

Configure param as value in the request manager.

Parameters:
  • param – name of the setting to be changed.
  • value – new value for param. If None, 0, False, and similar values, then explicit param declaration is removed, in which case it takes its default value, if any.
_apply_ssl_file_param(config: Union[patroni.config.Config, Dict[str, Any]], name: str) → Optional[str]

Apply a given SSL related param to the request manager.

Parameters:
  • config – Patroni YAML configuration.
  • name –

    prefix of the Patroni SSL related setting name. Currently, supports these:

    • cert: gets translated to certfile
    • key: gets translated to keyfile

    Will attempt to fetch the requested key first from ctl section.
Returns:

value of ctl.*name*file if present, None otherwise.
static _get_ctl_value(config: Union[patroni.config.Config, Dict[str, Any]], name: str, default: Any = None) → Optional[Any]

Get value of name setting from the ctl section of the config.

Parameters:
  • config – Patroni YAML configuration.
  • name – name of the setting value to be retrieved.
Returns:

value of ctl.*name* if present, None otherwise.
static _get_restapi_value(config: Union[patroni.config.Config, Dict[str, Any]], name: str) → Optional[Any]

Get value of name setting from the restapi section of the config.

Parameters:
  • config – Patroni YAML configuration.
  • name – name of the setting value to be retrieved.
Returns:

value of restapi -> *name* if present, None otherwise.
reload_config(config: Union[patroni.config.Config, Dict[str, Any]]) → None

Apply config to request manager.

Configure these HTTP headers for requests:

  • authorization: based on Patroni’ CTL or REST API authentication config;
  • user-agent: based on patroni.utils.USER_AGENT.

Also configure SSL related settings for requests:

  • ca_certs is configured if ctl.cacert or restapi.cafile is available;
  • cert, key and key_password are configured if ctl.certfile is available.
Parameters:config – Patroni YAML configuration.
request(method: str, url: str, body: Optional[Any] = None, **kwargs) → urllib3.response.HTTPResponse

Perform an HTTP request.

Parameters:
  • method – the HTTP method to be used, e.g. GET.
  • url – the URL to be requested.
  • body – anything to be used as the request body.
  • kwargs – keyword arguments to be passed to urllib3.PoolManager.request().
Returns:

the response returned upon request.
patroni.request.get(url: str, verify: bool = True, **kwargs) → urllib3.response.HTTPResponse

Perform an HTTP GET request.

Note

It uses PatroniRequest so all relevant configuration is applied before processing the request.

Parameters:
  • url – full URL for this GET request.
  • verify – if it should verify SSL certificates when processing the request.
Returns:

the response returned from the request.