Add documentation for ipaddr filters (#70343)
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Baptiste Mille-Mathias
GitHub
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1 changed files with 90 additions and 8 deletions
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@ -32,6 +32,7 @@ It can usually be installed with either your system package manager or using
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:depth: 2
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:backlinks: top
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Basic tests
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^^^^^^^^^^^
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@ -293,12 +294,15 @@ on an interface:
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If needed, you can extract subnet and prefix information from the 'host/prefix' value::
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.. code-block:: jinja
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# {{ host_prefix | ansible.netcommon.ipaddr('host/prefix') | ansible.netcommon.ipaddr('subnet') }}
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['2001:db8:deaf:be11::/64', '192.0.2.0/24']
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# {{ host_prefix | ansible.netcommon.ipaddr('host/prefix') | ansible.netcommon.ipaddr('prefix') }}
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[64, 24]
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Converting subnet masks to CIDR notation
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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@ -330,6 +334,7 @@ This result can be converted to canonical form with ``ipaddr()`` to produce a su
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# {{ net_mask | ansible.netcommon.ipaddr('net') }}
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'192.168.0.0/24'
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Getting information about the network in CIDR notation
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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@ -346,6 +351,7 @@ This can be used to obtain the network address in CIDR notation format::
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# {{ ip_address | ansible.netcommon.ipaddr('network/prefix') }}
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'192.168.0.0/24'
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IP address conversion
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^^^^^^^^^^^^^^^^^^^^^
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@ -411,6 +417,7 @@ be automatically converted to a router address (with a ``::1/48`` host address):
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.. _6to4: https://en.wikipedia.org/wiki/6to4
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Finding IP addresses within a range
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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@ -431,13 +438,6 @@ To find the available range of IP addresses from the given network address, use
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# {{ '192.168.122.1/24' | ansible.netcommon.ipaddr('range_usable') }}
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192.168.122.1-192.168.122.254
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To find the next nth usable IP address within a range, use ``next_nth_usable``::
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# {{ '192.168.122.1/24' | ansible.netcommon.next_nth_usable(2) }}
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192.168.122.3
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In this example, ``next_nth_usable`` returns the second usable IP address for the given IP range.
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To find the peer IP address for a point to point link, use ``peer``::
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# {{ '192.168.122.1/31' | ansible.netcommon.ipaddr('peer') }}
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@ -445,6 +445,69 @@ To find the peer IP address for a point to point link, use ``peer``::
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# {{ '192.168.122.1/30' | ansible.netcommon.ipaddr('peer') }}
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192.168.122.2
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To return the nth ip from a network, use the filter ``nthhost``::
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# {{ '10.0.0.0/8' | ansible.netcommon.nthhost(305) }}
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10.0.1.49
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``nthhost`` also supports a negative value::
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# {{ '10.0.0.0/8' | ansible.netcommon.nthhost(-1) }}
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10.255.255.255
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To find the next nth usable IP address in relation to another within a range, use ``next_nth_usable``
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In the example, ``next_nth_usable`` returns the second usable IP address for the given IP range::
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# {{ '192.168.122.1/24' | ansible.netcommon.next_nth_usable(2) }}
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192.168.122.3
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If there is no usable address, it returns an empty string::
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# {{ '192.168.122.254/24' | ansible.netcommon.next_nth_usable(2) }}
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""
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Just like ``next_nth_ansible``, you have ``previous_nth_usable`` to find the previous usable address::
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# {{ '192.168.122.10/24' | ansible.netcommon.previous_nth_usable(2) }}
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192.168.122.8
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Testing if a address belong to a network range
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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The ``network_in_usable`` filter returns whether an address passed as an argument is usable in a network.
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Usable addresses are addresses that can be assigned to a host. The network ID and the broadcast address
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are not usable addresses.::
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# {{ '192.168.0.0/24' | ansible.netcommon.network_in_usable( '192.168.0.1' ) }}
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True
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# {{ '192.168.0.0/24' | ansible.netcommon.network_in_usable( '192.168.0.255' ) }}
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False
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# {{ '192.168.0.0/16' | ansible.netcommon.network_in_usable( '192.168.0.255' ) }}
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True
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The ``network_in_network`` filter returns whether an address or a network passed as argument is in a network.::
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# {{ '192.168.0.0/24' | ansible.netcommon.network_in_network( '192.168.0.1' ) }}
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True
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# {{ '192.168.0.0/24' | ansible.netcommon.network_in_network( '192.168.0.0/24' ) }}
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True
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# {{ '192.168.0.0/24' | ansible.netcommon.network_in_network( '192.168.0.255' ) }}
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True
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# Check in a network is part of another network
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# {{ '192.168.0.0/16' | ansible.netcommon.network_in_network( '192.168.0.0/24' ) }}
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True
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To check whether multiple addresses belong to a network, use the ``reduce_on_network`` filter::
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# {{ '192.168.0.0/24' | ansible.netcommon.reduce_on_network( ['192.168.0.34', '10.3.0.3', '192.168.2.34'] ) }}
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['192.168.0.34']
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IP Math
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^^^^^^^
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@ -455,24 +518,32 @@ The ``ipmath()`` filter can be used to do simple IP math/arithmetic.
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Here are a few simple examples::
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# Get the next five addresses based on an IP address
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# {{ '192.168.1.5' | ansible.netcommon.ipmath(5) }}
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192.168.1.10
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# Get the ten previous addresses based on an IP address
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# {{ '192.168.0.5' | ansible.netcommon.ipmath(-10) }}
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192.167.255.251
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# Get the next five addresses using CIDR notation
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# {{ '192.168.1.1/24' | ansible.netcommon.ipmath(5) }}
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192.168.1.6
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# Get the previous five addresses using CIDR notation
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# {{ '192.168.1.6/24' | ansible.netcommon.ipmath(-5) }}
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192.168.1.1
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# Get the previous ten address using cidr notation
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# It returns a address of the previous network range
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# {{ '192.168.2.6/24' | ansible.netcommon.ipmath(-10) }}
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192.168.1.252
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# Get the next ten addresses in IPv6
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# {{ '2001::1' | ansible.netcommon.ipmath(10) }}
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2001::b
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# Get the previous ten address in IPv6
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# {{ '2001::5' | ansible.netcommon.ipmath(-10) }}
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2000:ffff:ffff:ffff:ffff:ffff:ffff:fffb
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@ -582,6 +653,7 @@ Because of the size of IPv6 subnets, iteration over all of them to find the
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correct one may take some time on slower computers, depending on the size
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difference between the subnets.
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Subnet Merging
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^^^^^^^^^^^^^^
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@ -606,6 +678,7 @@ subnet which contains all of the inputs::
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{{ ['192.168.1.42', '192.168.42.1'] | ansible.netcommon.cidr_merge('span') }}
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# => '192.168.0.0/18'
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MAC address filter
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^^^^^^^^^^^^^^^^^^
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@ -637,6 +710,15 @@ The supported formats result in the following conversions for the ``1a:2b:3c:4d:
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linux or unix: 1a:2b:3c:4d:5e:6f:
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pgsql, postgresql, or psql: 1a2b3c:4d5e6f
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Generate an IPv6 address in Stateless Configuration (SLAAC)
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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the filter ``slaac()`` generates an IPv6 address for a given network and a MAC Address in Stateless Configuration::
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# {{ fdcf:1894:23b5:d38c:0000:0000:0000:0000 | slaac('c2:31:b3:83:bf:2b') }}
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fdcf:1894:23b5:d38c:c031:b3ff:fe83:bf2b
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.. seealso::
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