tripleo-image-elements/elements/haproxy

Element to install haproxy. This element proxies services listed in haproxy.services and additionally enables ports in firewall.

Configuration

The following properties are supported for configuring haproxy

• haproxy.services: A list of listen blocks. Also supports proxy_ip and proxy_port sub-properties.
• haproxy.nodes: A list of server : lines. These are added to any haproxy.services which do not define this sub-property.
• haproxy.stats.disabled: Set to true to disable the stats service
• haproxy.stats.port: Port for the stats service. Defaults to 1993.
• haproxy.stats.uri: URI for the stats service. Defaults to /.
• haproxy.global_maxconn: A limit on the total number of concurrent connections that will be handled by a haproxy instance. haproxy will stop accepting connections above this limit.
• haproxy.service_maxconn: A limit on the number of the number of concurrent connections that are allowed to each proxied service. This is a default value that can be overridden in an individual haproxy.service section.
• haproxy.timeout.http-request: Set the maximum default allowed time to wait for a complete HTTP request.
• haproxy.timeout.queue: Set the maximum default time to wait in the queue for a connection slot to be free.
• haproxy.timeout.connect: Set the maximum default time to wait for a connection attempt to a server to succeed.
• haproxy.timeout.client: Set the maximum default inactivity time on the client side.
• haproxy.timeout.server: Set the maximum default inactivity time on the server side.
• haproxy.timeout.check: Set additional check timeout, but only after a connection has been already established.

Each haproxy.services can define the following sub-properties

• name: A name for the service.
• haproxy.nodes: Same as above. This overrides the global haproxy.nodes list if it is set.
• net_binds: A list of ip addresses and ports to bind to. Each element in the list must define a port and can define an IP. If no IP is defined then the service binds to all IP's.
• balance: DEPRECATED A balancing strategy for the service. Defaults to source.
• port: Port to connect to for each of the haproxy.nodes.
• options: A list of arbitrary params (eg. timeout server 1h) to be configured for the listener
• extra_server_params: A list of parameters that will be appended to each backend server line that is generated.
• proxy_ip: DEPRECATED IP address for a service to bind to. Defaults to all IP's (0.0.0.0).
• proxy_port: DEPRECATED Port for a service to bind to.
• service_maxconn: A limit on the number of concurrent connections allowed to this service.
• check_interval: The interval between two consecutive health checks in milliseconds.

Each haproxy.nodes can define the following sub-properties

• name: A name for the node.
• ip: IP address to connect to for the node.
• port: Port to connect to for the node. This overrides any port value defined in haproxy.services.

If haproxy is configured to bind to a virtual IP with keepalived sysctl must be configured to use "net.ipv4.ip_nonlocal_bind = 1" This setting allows allows a program like HA-Proxy to create listening sockets on network interfaces that do not actually exist on the server.

• This can be set in heat meatadata for node properties. EX: in overcloud-source.yaml for controllerConfig under properties: sysctl: net.ipv4.ip_nonlocal_bind: 1

Example Configurations

haproxy:
  nodes:
  - name: notcompute
    ip: 192.0.2.5
  - name: notcomputeSlave0
    ip: 192.0.2.6
  services:
  - name: dashboard_cluster
    net_binds:
    - ip: 192.0.2.3
      port: 443
    - ip: 192.0.2.3
      port: 444
    balance: roundrobin
  - name: glance_api_cluster
    proxy_ip: 192.0.2.3
    proxy_port: 9293
    port:9292
    balance: source
  - name: mysql
    port: 3306
    extra_server_params:
    - backup

You can override set of nodes for a service by setting its own set of haproxy.nodes inside a service definition:

services:
- name: dashboard_cluster
  net_binds:
  - ip: 192.0.2.3
    port: 444
  - port: 443
  balance: source
  haproxy:
    nodes:
    - name: foo0
      ip: 10.0.0.1

You can provide net_binds only once, for example:

haproxy:
  nodes:
    - name: foo0
      ip: 10.0.0.1
  net_binds:
    - ip: 192.0.2.3
  services:
    - name: keystone
      port: 5000
    - name: dashboard_cluster
      port: 80
      net_binds:
      - ip: 192.0.2.10

If there is no haproxy.services.net_binds.port defined - haproxy.services.port will be used.