community.general.consul – Add, modify & delete services within a consul cluster.¶
Note
This plugin is part of the community.general collection (version 2.5.1).
To install it use: ansible-galaxy collection install community.general
.
To use it in a playbook, specify: community.general.consul
.
Synopsis¶
Registers services and checks for an agent with a consul cluster. A service is some process running on the agent node that should be advertised by consul’s discovery mechanism. It may optionally supply a check definition, a periodic service test to notify the consul cluster of service’s health.
Checks may also be registered per node e.g. disk usage, or cpu usage and notify the health of the entire node to the cluster. Service level checks do not require a check name or id as these are derived by Consul from the Service name and id respectively by appending ‘service:’ Node level checks require a check_name and optionally a check_id.
Currently, there is no complete way to retrieve the script, interval or ttl metadata for a registered check. Without this metadata it is not possible to tell if the data supplied with ansible represents a change to a check. As a result this does not attempt to determine changes and will always report a changed occurred. An API method is planned to supply this metadata so at that stage change management will be added.
See http://consul.io for more details.
Requirements¶
The below requirements are needed on the host that executes this module.
python-consul
requests
Parameters¶
Parameter | Choices/Defaults | Comments |
---|---|---|
check_id
string
|
an ID for the service check. If state=absent, defaults to check_name. Ignored if part of a service definition.
|
|
check_name
string
|
a name for the service check. Required if standalone, ignored if part of service definition.
|
|
host
string
|
Default: "localhost"
|
host of the consul agent defaults to localhost
|
http
string
|
checks can be registered with an HTTP endpoint. This means that consul will check that the http endpoint returns a successful HTTP status. interval must also be provided with this option.
|
|
interval
string
|
the interval at which the service check will be run. This is a number with a s or m suffix to signify the units of seconds or minutes e.g
15s or 1m . If no suffix is supplied, m will be used by default e.g. 1 will be 1m . Required if the script parameter is specified. |
|
notes
string
|
Notes to attach to check when registering it.
|
|
port
integer
|
Default: 8500
|
the port on which the consul agent is running
|
scheme
string
|
Default: "http"
|
the protocol scheme on which the consul agent is running
|
script
string
|
the script/command that will be run periodically to check the health of the service. Scripts require interval and vice versa.
|
|
service_address
string
|
the address to advertise that the service will be listening on. This value will be passed as the address parameter to Consul's /v1/agent/service/register API method, so refer to the Consul API documentation for further details.
|
|
service_id
string
|
the ID for the service, must be unique per node. If state=absent, defaults to the service name if supplied.
|
|
service_name
string
|
Unique name for the service on a node, must be unique per node, required if registering a service. May be omitted if registering a node level check
|
|
service_port
integer
|
the port on which the service is listening. Can optionally be supplied for registration of a service, i.e. if service_name or service_id is set
|
|
state
string
|
|
register or deregister the consul service, defaults to present
|
tags
list
/ elements=string
|
tags that will be attached to the service registration.
|
|
tcp
string
added in 1.3.0 of community.general
|
Checks can be registered with a TCP port. This means that consul will check if the connection attempt to that port is successful (that is, the port is currently accepting connections). The format is
host:port , for example localhost:80 . interval must also be provided with this option. |
|
timeout
string
|
A custom HTTP check timeout. The consul default is 10 seconds. Similar to the interval this is a number with a
s or m suffix to signify the units of seconds or minutes, e.g. 15s or 1m . |
|
token
string
|
the token key identifying an ACL rule set. May be required to register services.
|
|
ttl
string
|
checks can be registered with a ttl instead of a script and interval this means that the service will check in with the agent before the ttl expires. If it doesn't the check will be considered failed. Required if registering a check and the script an interval are missing Similar to the interval this is a number with a s or m suffix to signify the units of seconds or minutes e.g
15s or 1m . If no suffix is supplied, m will be used by default e.g. 1 will be 1m |
|
validate_certs
boolean
|
|
whether to verify the TLS certificate of the consul agent
|
Examples¶
- name: Register nginx service with the local consul agent
community.general.consul:
service_name: nginx
service_port: 80
- name: Register nginx service with curl check
community.general.consul:
service_name: nginx
service_port: 80
script: curl http://localhost
interval: 60s
- name: register nginx with a tcp check
community.general.consul:
service_name: nginx
service_port: 80
interval: 60s
tcp: localhost:80
- name: Register nginx with an http check
community.general.consul:
service_name: nginx
service_port: 80
interval: 60s
http: http://localhost:80/status
- name: Register external service nginx available at 10.1.5.23
community.general.consul:
service_name: nginx
service_port: 80
service_address: 10.1.5.23
- name: Register nginx with some service tags
community.general.consul:
service_name: nginx
service_port: 80
tags:
- prod
- webservers
- name: Remove nginx service
community.general.consul:
service_name: nginx
state: absent
- name: Register celery worker service
community.general.consul:
service_name: celery-worker
tags:
- prod
- worker
- name: Create a node level check to test disk usage
community.general.consul:
check_name: Disk usage
check_id: disk_usage
script: /opt/disk_usage.py
interval: 5m
- name: Register an http check against a service that's already registered
community.general.consul:
check_name: nginx-check2
check_id: nginx-check2
service_id: nginx
interval: 60s
http: http://localhost:80/morestatus
Authors¶
Steve Gargan (@sgargan)