Documentation

bigip_monitor_dns – Manage DNS monitors on a BIG-IP

New in version 2.7.

Synopsis

  • Manages DNS monitors on a BIG-IP.

Requirements

The below requirements are needed on the host that executes this module.

  • f5-sdk >= 3.0.16

Parameters

Parameter Choices/Defaults Comments
accept_rcode
-
    Choices:
  • no-error
  • anything
Specifies the RCODE required in the response for an up status.
When creating a new monitor, if this parameter is not specified, the default value is no-error.
When no-error, specifies that the status of the node will be marked up if the received DNS message has no error.
When anything, specifies that the status of the node will be marked up irrespective of the RCODE in the DNS message received.
If this parameter is set to anything, it will disregard the receive string, and nullify it if the monitor is being updated.
adaptive
boolean
    Choices:
  • no
  • yes
Specifies whether adaptive response time monitoring is enabled for this monitor.
When yes, the monitor determines the state of a service based on how divergent from the mean latency a monitor probe for that service is allowed to be. Also, values for the allowed_divergence, adaptive_limit, and and sampling_timespan will be enforced.
When disabled, the monitor determines the state of a service based on the interval, up_interval, time_until_up, and timeout monitor settings.
adaptive_limit
-
Specifies the absolute number of milliseconds that may not be exceeded by a monitor probe, regardless of allowed_divergence setting, for a probe to be considered successful.
This value applies regardless of the value of the allowed_divergence setting.
While this value can be configured when adaptive is no, it will not take effect on the system until adaptive is yes.
allowed_divergence_type
-
    Choices:
  • relative
  • absolute
When specifying a new monitor, if adaptive is yes, the default is relative
When absolute, the number of milliseconds the latency of a monitor probe can exceed the mean latency of a monitor probe for the service being probed. In typical cases, if the monitor detects three probes in a row that miss the latency value you set, the pool member or node is marked down.
When relative, the percentage of deviation the latency of a monitor probe can exceed the mean latency of a monitor probe for the service being probed.
allowed_divergence_value
-
When specifying a new monitor, if adaptive is yes, and type is relative, the default is 25 percent.
answer_section_contains
-
    Choices:
  • any-type
  • anything
  • query-type
Specifies the type of DNS query that the monitor sends.
When creating a new monitor, if this value is not specified, the default value is query-type.
When query-type, specifies that the response should contain at least one answer of which the resource record type matches the query type.
When any-type, specifies that the DNS message should contain at least one answer.
When anything, specifies that an empty answer is enough to mark the status of the node up.
description
-
The description of the monitor.
interval
-
The interval specifying how frequently the monitor instance of this template will run.
This value must be less than the timeout value.
When creating a new monitor, if this parameter is not provided, the default 5 will be used.
ip
-
IP address part of the IP/port definition.
If this parameter is not provided when creating a new monitor, then the default value will be *.
manual_resume
boolean
    Choices:
  • no
  • yes
Specifies whether the system automatically changes the status of a resource to enabled at the next successful monitor check.
If you set this option to yes, you must manually re-enable the resource before the system can use it for load balancing connections.
When creating a new monitor, if this parameter is not specified, the default value is no.
When yes, specifies that you must manually re-enable the resource after an unsuccessful monitor check.
When no, specifies that the system automatically changes the status of a resource to enabled at the next successful monitor check.
name
- / required
Specifies the name of the monitor.
parent
-
Default:
/Common/dns
The parent template of this monitor template. Once this value has been set, it cannot be changed. By default, this value is the dns parent on the Common partition.
partition
-
Default:
Common
Device partition to manage resources on.
password
- / required
The password for the user account used to connect to the BIG-IP.
You may omit this option by setting the environment variable F5_PASSWORD.

aliases: pass, pwd
port
-
Port address part of the IP/port definition.
If this parameter is not provided when creating a new monitor, then the default value will be *.
Note that if specifying an IP address, a value between 1 and 65535 must be specified.
provider
-
added in 2.5
Default:
None
A dict object containing connection details.
password
- / required
The password for the user account used to connect to the BIG-IP.
You may omit this option by setting the environment variable F5_PASSWORD.

aliases: pass, pwd
server
- / required
The BIG-IP host.
You may omit this option by setting the environment variable F5_SERVER.
server_port
-
Default:
443
The BIG-IP server port.
You may omit this option by setting the environment variable F5_SERVER_PORT.
ssh_keyfile
-
Specifies the SSH keyfile to use to authenticate the connection to the remote device. This argument is only used for cli transports.
You may omit this option by setting the environment variable ANSIBLE_NET_SSH_KEYFILE.
timeout
-
Default:
10
Specifies the timeout in seconds for communicating with the network device for either connecting or sending commands. If the timeout is exceeded before the operation is completed, the module will error.
transport
- / required
    Choices:
  • rest
  • cli ←
Configures the transport connection to use when connecting to the remote device.
user
- / required
The username to connect to the BIG-IP with. This user must have administrative privileges on the device.
You may omit this option by setting the environment variable F5_USER.
validate_certs
boolean
    Choices:
  • no
  • yes ←
If no, SSL certificates are not validated. Use this only on personally controlled sites using self-signed certificates.
You may omit this option by setting the environment variable F5_VALIDATE_CERTS.
query_name
-
Specifies a query name for the monitor to use in a DNS query.
query_type
-
    Choices:
  • a
  • aaaa
Specifies the type of DNS query that the monitor sends.
When creating a new monitor, if this parameter is not specified, the default value is a.
When a, specifies that the monitor will send a DNS query of type A.
When aaaa, specifies that the monitor will send a DNS query of type AAAA.
receive
-
Specifies the IP address that the monitor uses from the resource record sections of the DNS response.
The IP address should be specified in the dotted-decimal notation or IPv6 notation.
reverse
boolean
    Choices:
  • no
  • yes
Specifies whether the monitor operates in reverse mode.
When the monitor is in reverse mode, a successful receive string match marks the monitored object down instead of up. You can use the this mode only if you configure the receive option.
This parameter is not compatible with the time_until_up parameter. If time_until_up is specified, it must be 0. Or, if it already exists, it must be 0.
sampling_timespan
-
Specifies the length, in seconds, of the probe history window that the system uses to calculate the mean latency and standard deviation of a monitor probe.
While this value can be configured when adaptive is no, it will not take effect on the system until adaptive is yes.
server
- / required
The BIG-IP host.
You may omit this option by setting the environment variable F5_SERVER.
server_port
-
added in 2.2
Default:
443
The BIG-IP server port.
You may omit this option by setting the environment variable F5_SERVER_PORT.
state
-
    Choices:
  • present ←
  • absent
When present, ensures that the monitor exists.
When absent, ensures the monitor is removed.
time_until_up
-
Specifies the amount of time in seconds after the first successful response before a node will be marked up.
A value of 0 will cause a node to be marked up immediately after a valid response is received from the node.
If this parameter is not provided when creating a new monitor, then the default value will be 0.
timeout
-
The number of seconds in which the node or service must respond to the monitor request.
If the target responds within the set time period, it is considered up.
If the target does not respond within the set time period, it is considered down.
You can change this number to any number you want, however, it should be 3 times the interval number of seconds plus 1 second.
If this parameter is not provided when creating a new monitor, then the default value will be 16.
transparent
boolean
    Choices:
  • no
  • yes
Specifies whether the monitor operates in transparent mode.
Monitors in transparent mode can monitor pool members through firewalls.
When creating a new monitor, if this parameter is not provided, then the default value will be no.
up_interval
-
Specifies the interval for the system to use to perform the health check when a resource is up.
When 0, specifies that the system uses the interval specified in interval to check the health of the resource.
When any other number, enables specification of a different interval to use when checking the health of a resource that is up.
When creating a new monitor, if this parameter is not provided, the default 0 will be used.
user
- / required
The username to connect to the BIG-IP with. This user must have administrative privileges on the device.
You may omit this option by setting the environment variable F5_USER.
validate_certs
boolean
added in 2.0
    Choices:
  • no
  • yes ←
If no, SSL certificates are not validated. Use this only on personally controlled sites using self-signed certificates.
You may omit this option by setting the environment variable F5_VALIDATE_CERTS.

Notes

Note

  • For more information on using Ansible to manage F5 Networks devices see https://www.ansible.com/integrations/networks/f5.
  • Requires the f5-sdk Python package on the host. This is as easy as pip install f5-sdk.
  • Requires BIG-IP software version >= 12.
  • The F5 modules only manipulate the running configuration of the F5 product. To ensure that BIG-IP specific configuration persists to disk, be sure to include at least one task that uses the bigip_config module to save the running configuration. Refer to the module’s documentation for the correct usage of the module to save your running configuration.

Examples

- name: Create a DNS monitor
  bigip_monitor_dns:
    name: DNS-UDP-V6
    interval: 2
    query_name: localhost
    query_type: aaaa
    up_interval: 5
    adaptive: no
    password: secret
    server: lb.mydomain.com
    state: present
    user: admin
  delegate_to: localhost

Return Values

Common return values are documented here, the following are the fields unique to this module:

Key Returned Description
accept_rcode
string
changed
RCODE required in the response for an up status.

Sample:
no-error
adaptive
boolean
changed
Whether adaptive is enabled or not.

Sample:
True
adaptive_limit
integer
changed
Absolute number of milliseconds that may not be exceeded by a monitor probe.

Sample:
200
allowed_divergence_type
string
changed
Type of divergence used for adaptive response time monitoring.

Sample:
absolute
allowed_divergence_value
integer
changed
Value of the type of divergence used for adaptive response time monitoring.
May be percent or ms depending on whether relative or absolute.

Sample:
25
answer_section_contains
string
changed
Type of DNS query that the monitor sends.

Sample:
query-type
description
string
changed
The description of the monitor.

Sample:
Important Monitor
interval
integer
changed
The new interval in which to run the monitor check.

Sample:
2
ip
string
changed
The new IP of IP/port definition.

Sample:
10.12.13.14
manual_resume
string
changed
Whether the system automatically changes the status of a resource to enabled at the next successful monitor check.

Sample:
query-type
parent
string
changed
New parent template of the monitor.

Sample:
http
port
string
changed
Alias port or service for the monitor to check, on behalf of the pools or pool members with which the monitor is associated.

Sample:
80
query_name
string
changed
Query name for the monitor to use in a DNS query.

Sample:
foo
query_type
string
changed
Type of DNS query that the monitor sends. Either a or aaaa.

Sample:
aaaa
receive
string
changed
IP address that the monitor uses from the resource record sections of the DNS response.

Sample:
2.3.2.4
reverse
boolean
changed
Whether the monitor operates in reverse mode.

Sample:
True
sampling_timespan
integer
changed
Absolute number of milliseconds that may not be exceeded by a monitor probe.

Sample:
200
time_until_up
integer
changed
The new time in which to mark a system as up after first successful response.

Sample:
2
timeout
integer
changed
The new timeout in which the remote system must respond to the monitor.

Sample:
10
transparent
boolean
changed
Whether the monitor operates in transparent mode.

up_interval
integer
changed
Interval for the system to use to perform the health check when a resource is up.



Status

Authors

  • Tim Rupp (@caphrim007)
  • Wojciech Wypior (@wojtek0806)

Hint

If you notice any issues in this documentation you can edit this document to improve it.