Further testing confd with json values

docker-compose.yml

---


confd:
    build: .
    links:
        - etcd
    volumes:
        - ${PWD}/example.tmpl:/etc/confd/templates/example.tmpl
    environment:
        - "KEY_PREFIX=haproxy-mynamespace-api"
        - "ETCD_ENDPOINT=http://etcd:2379"
    entrypoint:
        - /go/entrypoint.sh


etcdctl:
    image: local/etcdctl
    environment:
        - "ETCDCTL_PEERS=http://etcd:2379"
        - "SLEEP=30"
    links:
        - etcd
    volumes:
        - ${PWD}/load.sh:/root/load.sh

etcd:
  image: quay.io/coreos/etcd:v2.0.12
  environment:
   - "ETCD_LISTEN_CLIENT_URLS=http://0.0.0.0:2379,http://0.0.0.0:4001"
   - "ETCD_ADVERTISE_CLIENT_URLS=http://etcd:2379,http://etcd:4001"
  ports:
    - "4001:4001"
    - "2379:2379"

etcd_load.sh

echo Loading etcd
etcdctl set /haproxy-mynamespace-api/services/backends/http-backend-v1-80  '{"claims":["/api"],"name":"http-backend-v1-80","servers":["backend:80"]}'
etcdctl set /haproxy-mynamespace-api/services/backends/http-backend-v3-80  '{"claims":["/api/v3"],"name":"http-backend-v3-80","servers":["backend:80"]}'
etcdctl set /haproxy-mynamespace-api/services/claims/-api  '{"url":"/api","backend":"http-backend-v1-80"}'
etcdctl set /haproxy-mynamespace-api/services/claims/-api-v3  '{"url":"/api/v3","backend":"http-backend-v3-80"}'
sleep $SLEEP
echo Removing backend http-backend-v1-80
etcdctl set /haproxy-mynamespace-api/services/backends/http-backend-v3-80  '{"claims":["/api","/api/v3"],"name":"http-backend-v3-80","servers":["backend:80"]}'
etcdctl set /haproxy-mynamespace-api/services/claims/-api  '{"url":"/api","backend":"http-backend-v3-80"}'
etcdctl set /haproxy-mynamespace-api/services/claims/-api-v3  '{"url":"/api/v3","backend":"http-backend-v3-80"}'
etcdctl rm /haproxy-mynamespace-api/services/backends/http-backend-v1-80
sleep $SLEEP
echo Test two backends
etcdctl set /haproxy-mynamespace-api/services/backends/http-backend-v3-80  '{"claims":["/api","/api/v3"],"name":"http-backend-v3-80","servers":["backend:80","backend:8080"]}'

haproxy.cfg.tmpl

#  bof


#  claims, fe stands for frontend
frontend http-in
    bind *:8080

    acl site_dead nbsrv(all_servers) lt 1
    monitor-uri   /u_ok
    monitor fail  if site_dead

{{ range (ls "/services/claims" | sortByLength | reverse) }}{{$claim := json (printf "/services/claims/%s" . | getv)}}
    acl fe-{{$claim.backend}} path_beg -i {{$claim.url}}
    use_backend {{$claim.backend}}{{.}} if fe-{{$claim.backend}}
{{end}}
    default_backend nomatch


#  backends
{{range $backends := ls "/services/backends"}}{{$backend := json (printf "/services/backends/%s" $backends | getv)}}{{range $c := $backend.claims}}
backend {{$backend.name}}{{replace . "/" "-" -1}}
    balance leastconn
    option httpchk HEAD {{.}} HTTP/1.1\r\nHost:example.com
    {{range $backend.servers}}
    server {{$backend.name}}{{replace $c "/" "-" -1}}-{{join (split . ":") "-"}} {{.}} check
    {{end}}{{end}}{{end}}

backend all_servers
    option tcp-check {{range $backends := ls "/services/backends"}}{{$backend := json (printf "/services/backends/%s" $backends | getv)}}{{range $c := $backend.claims}}{{range $backend.servers}}
    server {{$backend.name}}{{replace $c "/" "-" -1}}-{{join (split . ":") "-"}} {{.}} check
    {{end}}{{end}}{{end}}

backend nomatch
    errorfile 503 /etc/haproxy/errors/nomatch.http


#  eof