Add statsd configuration for swift

This adds the optional configuration options:
  - statsd_host
  - statsd_port
  - statsd_metric_prefix (defaults to inventory_hostname)
  - statsd_default_sample_rate
  - statsd_sample_rate_factor

Which can be defined under swift globally or on the server level.
The configuration will only be added if statsd_host is defined.

Change-Id: I793b189e0a1f5ca4fc1fe17b1d89f2a83af8c796

defaults/main.yml

@@ -96,6 +96,11 @@ swift_service_adminurl: "{{ swift_service_adminuri }}/v1/AUTH_%(tenant_id)s"
 swift_service_internaluri: "{{ swift_service_internaluri_proto }}://{{ internal_lb_vip_address }}:{{ swift_proxy_port }}"
 swift_service_internalurl: "{{ swift_service_internaluri }}/v1/AUTH_%(tenant_id)s"
 swift_service_region: RegionOne
+statsd_host:
+statsd_port: 8125
+statsd_default_sample_rate: 1.0
+statsd_sample_rate_factor: 1.0
+statsd_metric_prefix:
 
 ## Keystone authentication middleware
 swift_keystone_auth_plugin: "password"

templates/account-server-replicator.conf.j2

@@ -10,6 +10,7 @@ bind_port = {{ swift_account_port }}
 devices = {{ swift_vars.mount_point | default(swift.mount_point) }}
 workers = {{ swift_account_server_replicator_workers | default(api_threads) }}
 log_facility = LOG_LOCAL2
+{% include "statsd.j2" %}
 
 [pipeline:main]
 pipeline = account-server

templates/account-server.conf.j2

@@ -11,6 +11,7 @@ workers = {{ swift_account_server_workers | default(api_threads) }}
 user = {{ swift_system_user_name }}
 devices = {{ swift_vars.mount_point | default(swift.mount_point) }}
 log_facility = LOG_LOCAL2
+{% include "statsd.j2" %}
 
 [pipeline:main]
 pipeline = healthcheck recon account-server

templates/container-reconciler.conf.j2

@@ -1,7 +1,10 @@
+# {{ ansible_managed }}
+
 [DEFAULT]
 swift_dir = /etc/swift
 user = {{ swift_system_user_name }}
 log_facility = LOG_LOCAL3
+{% include "statsd.j2" %}
 
 [container-reconciler]
 # The reconciler will re-attempt reconciliation if the source object is not

templates/container-server-replicator.conf.j2

@@ -10,6 +10,7 @@ bind_port = {{ swift_container_port }}
 devices = {{ swift_vars.mount_point | default(swift.mount_point) }}
 workers = {{ swift_server_replicator_workers | default(api_threads) }}
 log_facility = LOG_LOCAL3
+{% include "statsd.j2" %}
 
 [pipeline:main]
 pipeline = container-server

templates/container-server.conf.j2

@@ -11,6 +11,7 @@ workers = {{ swift_container_server_workers | default(api_threads) }}
 user = {{ swift_system_user_name }}
 devices = {{ swift_vars.mount_point | default(swift.mount_point) }}
 log_facility = LOG_LOCAL3
+{% include "statsd.j2" %}
 
 [pipeline:main]
 pipeline = healthcheck recon container-server

templates/object-expirer.conf.j2

@@ -4,6 +4,7 @@
 swift_dir = /etc/swift
 user = {{ swift_system_user_name }}
 log_facility = LOG_LOCAL4
+{% include "statsd.j2" %}
 
 [object-expirer]
 interval = 300

templates/object-server-replicator.conf.j2

@@ -10,6 +10,7 @@ bind_port = {{ swift_object_port }}
 devices = {{ swift_vars.mount_point | default(swift.mount_point) }}
 workers = {{ swift_object_replicator_workers | default(api_threads) }}
 log_facility = LOG_LOCAL4
+{% include "statsd.j2" %}
 
 [pipeline:main]
 pipeline = object-server

templates/object-server.conf.j2

@@ -12,6 +12,7 @@ user = {{ swift_system_user_name }}
 swift_dir = /etc/swift
 devices = {{ swift_vars.mount_point | default(swift.mount_point) }}
 log_facility = LOG_LOCAL4
+{% include "statsd.j2" %}
 
 [pipeline:main]
 pipeline = healthcheck recon object-server

templates/proxy-server.conf.j2

@@ -11,6 +11,38 @@ workers = {{ swift_proxy_server_workers | default(api_threads) }}
 user = {{ swift_system_user_name }}
 log_facility = LOG_LOCAL1
 
+{% if swift_proxy_vars is defined %}
+{%   if swift_proxy_vars.statsd_host is defined %}
+{%     set statsd = 1 %}
+log_statsd_host = {{ swift_proxy_vars.statsd_host | default(statsd_host) }}
+{%   elif swift.statsd_host is defined %}
+{%     set statsd = 1 %}
+log_statsd_host = {{ swift.statsd_host | default(statsd_host) }}
+{%   endif %}
+{%   if statsd is defined %}
+{%     if swift_proxy_vars.statsd_port is defined %}
+log_statsd_port = {{ swift_proxy_vars.statsd_port }}
+{%     else %}
+log_statsd_port = {{ swift.statsd_port | default(statsd_port) }}
+{%     endif %}
+{%     if swift_proxy_vars.statsd_default_sample_rate is defined %}
+log_statsd_default_sample_rate = {{ swift_proxy_vars.statsd_default_sample_rate }}
+{%     else %}
+log_statsd_default_sample_rate = {{ swift.statsd_default_sample_rate | default(statsd_default_sample_rate) }}
+{%     endif %}
+{%     if swift_proxy_vars.statsd_sample_rate_factor is defined %}
+log_statsd_sample_rate_factor = {{ swift_proxy_vars.statsd_sample_rate_factor }}
+{%     else %}
+log_statsd_sample_rate_factor = {{ swift.statsd_sample_rate_factor | default(statsd_sample_rate_factor) }}
+{%     endif %}
+{%     if swift_proxy_vars.statsd_metric_prefix is defined %}
+log_statsd_metric_prefix = {{ swift_proxy_vars.statsd_metric_prefix }}
+{%     else %}
+log_statsd_metric_prefix = {{ swift.statsd_metric_prefix | default(inventory_hostname) }}
+{%     endif %}
+{%   endif %}
+{% endif %}
+
 [pipeline:main]
 pipeline = {{ swift_middleware_list | join(' ') }}
 

templates/statsd.j2

@@ -0,0 +1,32 @@
+
+{% if swift_vars is defined %}
+{%   if swift_vars.statsd_host is defined %}
+{%     set statsd = 1 %}
+log_statsd_host = {{ swift_vars.statsd_host | default(statsd_host) }}
+{%   elif swift.statsd_host is defined %}
+{%     set statsd =1 %}
+log_statsd_host = {{ swift.statsd_host | default(statsd_host) }}
+{%   endif %}
+{%   if statsd is defined %}
+{%     if swift_vars.statsd_port is defined %}
+log_statsd_port = {{ swift_vars.statsd_port }}
+{%     else %}
+log_statsd_port = {{ swift.statsd_port | default(statsd_port) }}
+{%     endif %}
+{%     if swift_vars.statsd_default_sample_rate is defined %}
+log_statsd_default_sample_rate = {{ swift_vars.statsd_default_sample_rate }}
+{%     else %}
+log_statsd_default_sample_rate = {{ swift.statsd_default_sample_rate | default(statsd_default_sample_rate) }}
+{%     endif %}
+{%     if swift_vars.statsd_sample_rate_factor is defined %}
+log_statsd_sample_rate_factor = {{ swift_vars.statsd_sample_rate_factor }}
+{%     else %}
+log_statsd_sample_rate_factor = {{ swift.statsd_sample_rate_factor | default(statsd_sample_rate_factor) }}
+{%     endif %}
+{%     if swift_vars.statsd_metric_prefix is defined %}
+log_statsd_metric_prefix = {{ swift_vars.statsd_metric_prefix }}
+{%     else %}
+log_statsd_metric_prefix = {{ swift.statsd_metric_prefix | default(inventory_hostname) }}
+{%     endif %}
+{%   endif %}
+{% endif %}