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Greenplum

Deploy and monitor Greenplum clusters with Pigsty to build Massively Parallel Processing (MPP) PostgreSQL data warehouses.

Pigsty supports deployment of Greenplum clusters and the derivative distribution YMatrixDB. You can also add existing Greenplum deployments to Pigsty monitoring.


Overview

Only the professional/enterprise editions provide Greenplum / YMatrix cluster deployment. This capability is not currently open source.


Installation

Pigsty provides installation packages for Greenplum 6 (@el7) and Greenplum 7 (@el8). Open-source users can install and configure them manually.

# EL 7 Only (Greenplum6)
./node.yml -t node_install  -e '{"node_repo_modules":"pgsql","node_packages":["open-source-greenplum-db-6"]}'

# EL 8 Only (Greenplum7)
./node.yml -t node_install  -e '{"node_repo_modules":"pgsql","node_packages":["open-source-greenplum-db-7"]}'

Configuration

To define a Greenplum cluster, set pg_mode = gpsql. Also set the identity parameters pg_shard and gp_role.

#================================================================#
#                        GPSQL Clusters                          #
#================================================================#

#----------------------------------#
# cluster: mx-mdw (gp master)
#----------------------------------#
mx-mdw:
  hosts:
    10.10.10.10: { pg_seq: 1, pg_role: primary , nodename: mx-mdw-1 }
  vars:
    gp_role: master          # this cluster is used as greenplum master
    pg_shard: mx             # pgsql sharding name & gpsql deployment name
    pg_cluster: mx-mdw       # this master cluster name is mx-mdw
    pg_databases:
      - { name: matrixmgr , extensions: [ { name: matrixdbts } ] }
      - { name: meta }
    pg_users:
      - { name: meta , password: DBUser.Meta , pgbouncer: true }
      - { name: dbuser_monitor , password: DBUser.Monitor , roles: [ dbrole_readonly ], superuser: true }

    pgbouncer_enabled: true                # enable pgbouncer for greenplum master
    pgbouncer_exporter_enabled: false      # enable pgbouncer_exporter for greenplum master
    pg_exporter_params: 'host=127.0.0.1&sslmode=disable'  # use 127.0.0.1 as local monitor host

#----------------------------------#
# cluster: mx-sdw (gp master)
#----------------------------------#
mx-sdw:
  hosts:
    10.10.10.11:
      nodename: mx-sdw-1        # greenplum segment node
      pg_instances:             # greenplum segment instances
        6000: { pg_cluster: mx-seg1, pg_seq: 1, pg_role: primary , pg_exporter_port: 9633 }
        6001: { pg_cluster: mx-seg2, pg_seq: 2, pg_role: replica , pg_exporter_port: 9634 }
    10.10.10.12:
      nodename: mx-sdw-2
      pg_instances:
        6000: { pg_cluster: mx-seg2, pg_seq: 1, pg_role: primary , pg_exporter_port: 9633  }
        6001: { pg_cluster: mx-seg3, pg_seq: 2, pg_role: replica , pg_exporter_port: 9634  }
    10.10.10.13:
      nodename: mx-sdw-3
      pg_instances:
        6000: { pg_cluster: mx-seg3, pg_seq: 1, pg_role: primary , pg_exporter_port: 9633 }
        6001: { pg_cluster: mx-seg1, pg_seq: 2, pg_role: replica , pg_exporter_port: 9634 }
  vars:
    gp_role: segment               # these are nodes for gp segments
    pg_shard: mx                   # pgsql sharding name & gpsql deployment name
    pg_cluster: mx-sdw             # these segment clusters name is mx-sdw
    pg_preflight_skip: true        # skip preflight check (since pg_seq & pg_role & pg_cluster not exists)
    pg_exporter_config: pg_exporter_basic.yml                             # use basic config to avoid segment server crash
    pg_exporter_params: 'options=-c%20gp_role%3Dutility&sslmode=disable'  # use gp_role = utility to connect to segments

PG Exporter also requires extra connection parameters to collect metrics from Greenplum Segment instances.

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