#  vim:ts=4:sts=4:sw=4:et
#
#  Author: Hari Sekhon
#  Date: 2017-12-16 11:24:57 +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  -  Z e p p e l i n
# ============================================================================ #

frontend zeppelin
    description "Zeppelin"
    bind *:8080
    default_backend zeppelin

backend zeppelin
    description "Zeppelin"
    # switch to cookie based persistence roundrobin for horizontal scaling across instances
    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 /api/notebook
    http-check expect string '{"status":"OK","message":'
    server zeppelin zeppelin:8080 check
    server hadoop hadoop:8080 check backup
    server docker docker:8080 check backup
    server 192.168.99.100 192.168.99.100:8080 check backup