postgres

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Published: Mar 18, 2024 License: Apache-2.0 Imports: 16 Imported by: 0

README

Kubemq Postgres-aws Target Connector

Please see before starting:

Kubemq postgres-aws target connector allows services using kubemq server to access postgres database services.

Prerequisites

The following are required to run the postgres-aws target connector:

  • kubemq cluster
  • aws rds with IAM user postgres server
  • db user with IAM Authentication privileges
  • kubemq-targets deployment

Configuration

Postgres target connector configuration properties:

Properties Key Required Description Example
max_idle_connections no set max idle connections "10"
max_open_connections no set max open connections "100"
connection_max_lifetime_seconds no set max lifetime for connections in seconds "3600"
db_user yes aws db user name "<aws user"
db_name yes aws db name "<aws instance name"
aws_key yes aws key aws key supplied by aws
aws_secret_key yes aws secret key aws secret key supplied by aws
region yes region aws region
token no aws token ("default" empty string aws token
end_point yes aws rds end point "<aws rds end point"
                                                          |

Example:

bindings:
  - name: kubemq-query-aws-postgres
    source:
      kind: kubemq.query
      name: kubemq-query
      properties:
        address: "kubemq-cluster:50000"
        client_id: "kubemq-query-postgres-connector"
        auth_token: ""
        channel: "query.aws.rds.postgres"
        group:   ""
        auto_reconnect: "true"
        reconnect_interval_seconds: "1"
        max_reconnects: "0"
    target:
      kind: aws.rds.postgres
      name: aws-rds-postgres
      properties:
              instance_connection_name: "test"
              db_user:  "test"
              db_name:  "test"
              end_point: "my-end-point"
              aws_key: "id"
              aws_secret_key: 'json'
              region:  "region"
              token: ""
              max_idle_connections: "10"
              max_open_connections: "100"
              connection_max_lifetime_seconds: "3600"

Usage

Query Request

Query request metadata setting:

Metadata Key Required Description Possible values
method yes set type of request "query"

Query request data setting:

Data Key Required Description Possible values
data yes query string base64 bytes array

Example:

Query string: SELECT id,title,content FROM post;

{
  "metadata": {
    "method": "query"
  },
  "data": "U0VMRUNUIGlkLHRpdGxlLGNvbnRlbnQgRlJPTSBwb3N0Ow=="
}
Exec Request

Exec request metadata setting:

Metadata Key Required Description Possible values
method yes set type of request "exec"
isolation_level no set isolation level for exec operation ""
"read_uncommitted"
"read_committed"
"repeatable_read"
"serializable"

Exec request data setting:

Data Key Required Description Possible values
data yes exec string base64 bytes array

Example:

Exec string:

INSERT INTO post(ID,TITLE,CONTENT) VALUES (1,NULL,'Content One'),(2,'Title Two','Content Two');
{
  "metadata": {
    "method": "exec",
    "isolation_level": "read_uncommitted"
  },
  "data": "SU5TRVJUIElOVE8gcG9zdChJRCxUSVRMRSxDT05URU5UKSBWQUxVRVMKCSAgICAgICAgICAgICAgICAgICAgICAgKDEsTlVMTCwnQ29udGVudCBPbmUnKSwKCSAgICAgICAgICAgICAgICAgICAgICAgKDIsJ1RpdGxlIFR3bycsJ0NvbnRlbnQgVHdvJyk7" 
}
Transaction Request

Transaction request metadata setting:

Metadata Key Required Description Possible values
method yes set type of request "transaction"
isolation_level no set isolation level for exec operation ""
"read_uncommitted"
"read_committed"
"repeatable_read"
"serializable"

Transaction request data setting:

Data Key Required Description Possible values
data yes string string base64 bytes array

Example:

Transaction string:

DROP TABLE IF EXISTS post;
CREATE TABLE post (
         ID serial,
         TITLE varchar(40),
         CONTENT varchar(255),
         CONSTRAINT pk_post PRIMARY KEY(ID)
       );
INSERT INTO post(ID,TITLE,CONTENT) VALUES
                       (1,NULL,'Content One'),
                       (2,'Title Two','Content Two');
{
  "metadata": {
    "method": "transaction"
  },
  "data": "CURST1AgVEFCTEUgSUYgRVhJU1RTIHBvc3Q7CiAgICBDUkVBVEUgVEFCTEUgcG9zdCAoCgkgICAgICAgICBJRCBzZXJpYWwsCgkgICAgICAgICBUSVRMRSB2YXJjaGFyKDQwKSwKCSAgICAgICAgIENPTlRFTlQgdmFyY2hhcigyNTUpLAoJICAgICAgICAgQ09OU1RSQUlOVCBwa19wb3N0IFBSSU1BUlkgS0VZKElEKQoJICAgICAgICk7CiAgICBJTlNFUlQgSU5UTyBwb3N0KElELFRJVExFLENPTlRFTlQpIFZBTFVFUwoJICAgICAgICAgICAgICAgICAgICAgICAoMSxOVUxMLCdDb250ZW50IE9uZScpLAoJICAgICAgICAgICAgICAgICAgICAgICAoMiwnVGl0bGUgVHdvJywnQ29udGVudCBUd28nKTs="
}

Documentation

Index

Constants

This section is empty.

Variables

This section is empty.

Functions

func Connector

func Connector() *common.Connector

Types

type Client

type Client struct {
	// contains filtered or unexported fields
}

Client is a Client state store

func New

func New() *Client

func (*Client) Connector

func (c *Client) Connector() *common.Connector

func (*Client) Do

func (c *Client) Do(ctx context.Context, req *types.Request) (*types.Response, error)

func (*Client) Exec

func (c *Client) Exec(ctx context.Context, meta metadata, value []byte) (*types.Response, error)

func (*Client) Init

func (c *Client) Init(ctx context.Context, cfg config.Spec, log *logger.Logger) error

func (*Client) Query

func (c *Client) Query(ctx context.Context, meta metadata, value []byte) (*types.Response, error)

func (*Client) Stop

func (c *Client) Stop() error

func (*Client) Transaction

func (c *Client) Transaction(ctx context.Context, meta metadata, value []byte) (*types.Response, error)

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