NewsBlur/config/haproxy.conf.template

global
  maxconn 100000
  daemon
  ca-base /srv/newsblur/config/certificates
  crt-base /srv/newsblur/config/certificates
  tune.bufsize 32000
  tune.maxrewrite 8196
  tune.ssl.default-dh-param 2048
  log 127.0.0.1 local0 notice
  # log 127.0.0.1 local1 info

defaults
  log global
  maxconn 100000
  mode http
  option forwardfor
  option http-server-close
  option httpclose
  option log-health-checks
  option log-separate-errors
  option httplog
  option redispatch
  option abortonclose
  timeout connect 10s
  timeout client 10s
  timeout server 30s
  timeout tunnel 1h
  retries 3
  errorfile 502 /srv/newsblur/templates/502.http
  errorfile 503 /srv/newsblur/templates/502.http
  errorfile 504 /srv/newsblur/templates/502.http
  
frontend public
  bind :80
  bind :443 ssl crt newsblur.pem ciphers ECDHE-RSA-AES128-GCM-SHA256:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-RSA-AES128-SHA256:ECDHE-RSA-AES128-SHA:ECDHE-RSA-AES256-SHA384:ECDHE-RSA-AES256-SHA:AES128-GCM-SHA256:AES256-GCM-SHA384:AES128-SHA256:AES128-SHA:AES256-SHA256:AES256-SHA no-sslv3
  rspadd Strict-Transport-Security:\ max-age=0;\ includeSubDomains
  option http-server-close
  # Redirect all HTTP traffic to HTTPS
  # redirect scheme https if !{ ssl_fc }

  acl gunicorn_dead nbsrv(gunicorn) lt 1
  acl nginx_dead nbsrv(nginx) lt 1
  acl mx_mode nbsrv(maintenance) lt 1
  acl is_unread_count url_beg /reader/feed_unread_count
  acl is_refresh_feeds url_beg /reader/refresh_feed
  
  monitor-uri /status
  monitor fail  if gunicorn_dead
  monitor fail  if nginx_dead
  monitor fail  if mx_mode

  use_backend node_socket if { path_beg /v2/socket.io/ }
  use_backend node_favicon if { path_beg /rss_feeds/icon/ }
  use_backend nginx if { path_beg /media/ }
  use_backend nginx if { path_beg /static/ }
  use_backend nginx if { path_beg /favicon }
  use_backend nginx if { path_beg /crossdomain/ }
  use_backend nginx if { path_beg /robots }
  use_backend self if { path_beg /munin/ }
  
  use_backend nginx if mx_mode
  
  use_backend gunicorn_counts if is_unread_count
  use_backend gunicorn_refresh if is_refresh_feeds
  use_backend gunicorn unless gunicorn_dead || nginx_dead
 
backend node_socket
  http-check expect rstatus 200|503
  balance roundrobin
{{ node_socket }}
 
backend node_favicon
  http-check expect rstatus 200|503
  option httpchk GET /rss_feeds/icon/1
  balance roundrobin
{{ node_favicon }}

backend self
  balance roundrobin
  option httpchk GET /_nginxchk
  http-check expect rstatus 200|503
{{ www }}

backend nginx
  balance roundrobin
  option httpchk GET /_nginxchk
  http-check expect rstatus 200|503
{{ nginx }}

backend gunicorn
  balance roundrobin
  option httpchk GET /_haproxychk
{{ app }}

backend gunicorn_counts
  balance roundrobin
  option httpchk GET /_haproxychk
{{ gunicorn_counts }}

backend gunicorn_refresh
  balance roundrobin
  option httpchk GET /_haproxychk
{{ gunicorn_refresh }}

backend push
  balance roundrobin
  option httpchk GET /_haproxychk
{{ push }}

backend work
  balance roundrobin
  option httpchk GET /_nginxchk
  http-check expect rstatus 200|503
{{ work }}

backend postgres
  option httpchk GET /db_check/postgres
  server postgres-db01      db_pgsql:5000           check inter 2000ms
  
backend mongo
  option httpchk GET /db_check/mongo
  server mongo-db22a        db22a:5000              check inter 2000ms
  server mongo-db20         db20:5000               check inter 2000ms
  server mongo-db23a        db23a:5000              check inter 2000ms
  server mongo-db25a        db25a:5000              check inter 2000ms
  server mongo-db30         db30:5000               check inter 2000ms
  
backend redis
  option httpchk GET /db_check/redis
  server redis-db40         db_redis:5000           check inter 2000ms
  server redis-pubsub-db43  db_redis_pubsub:5000    check inter 2000ms
backend redis_story
  option httpchk GET /db_check/redis_story
  server redis-story-db42   db_redis_story:5000     check inter 2000ms
backend redis_sessions
  option httpchk GET /db_check/redis_sessions
  server redis-sess-db41    db_redis_sessions:5000  check inter 2000ms
backend elasticsearch
  option httpchk GET /db_check/elasticsearch
  server es-search01        db_search:5000          check inter 2000ms

backend maintenance
  option httpchk HEAD /maintenance HTTP/1.1\r\nHost:\ www
  http-check expect status 404
  http-check send-state
{{ maintenance }}

listen stats
  bind :1936 ssl crt newsblur.pem
  stats enable
  stats hide-version
  stats realm Haproxy\ Statistics
  stats uri /
  stats auth gimmiestats:StatsGiver
  stats refresh 15s