#  vim:ts=4:sts=4:sw=4:et
#
#  Author: Hari Sekhon
#  Date: 2017-12-16 09:18:34 +0000 (Sat, 16 Dec 2017)
#
#  https://github.com/HariSekhon/HAProxy-configs
#
#  License: see accompanying Hari Sekhon LICENSE file
#
#  If you're using my code you're welcome to connect with me on LinkedIn and optionally send me feedback to help steer this or other code I publish
#
#  https://www.linkedin.com/in/HariSekhon
#

# ============================================================================ #
#    H A P r o x y  -  H a d o o p   N a m e N o d e   U I  +  W e b H D F S
# ============================================================================ #

# Hadoop 3.0 onwards, ports changed from <= Hadoop 2.x which used port 50070

frontend hadoop-namenode
    description "Hadoop HDFS HA - Active NameNode"
    bind *:9870
    default_backend hadoop-namenode

backend hadoop-namenode
    description "Hadoop HDFS HA - Active NameNode"
    balance first
    acl internal_networks src 192.168.0.0/16 172.16.0.0/12 10.0.0.0/8 127.0.0.1
    http-request deny if ! internal_networks
    option httpchk GET '/jmx?qry=Hadoop:service=NameNode,name=NameNodeStatus'
    http-check expect rstring '"State"\s*:\s*"active"'
    server namenode namenode:9870 check
    server hadoop hadoop:9870 backup check backup
    server docker docker:9870 check backup
    server 192.168.99.100 192.168.99.100:9870 check backup