Templates, and salt modules eg: network.interfaces

[Mitch Anderson]

Hi,

Jeff had helped me figure this out in IRC last week... but I'm not understanding it like I thought I did...

First off... just working with my apache config files... was trying to get the box to auto insert its IP address in the NameVirtualHost settings in the configs automatically

We had come up with a state that looks like this:

/etc/nginx/sites-available/website:

  file.managed:

    - source: salt://roles/loadbalancer/files/website.conf

    - user: root

    - group: root

    - mode: 644

    - template: jinja

    - context:

        vhost_ip: {{ salt['network.interfaces']()['eth0']['ipaddr'] }}

This works great for the primary IP on the interface.  Now, since I have multiple SSL Certs... I have the need for multiple IP's on the box.

I have aliases on eth0 for the other IP's.

From the Salt master, I can run the network.interfaces module, which returns this:

# salt 'interceptor.example.com' 'network.interfaces'

{'interceptor.example.com': {'eth0': {'broadcast': '172.22.10.255',

                                      'hwaddr': '00:50:56:92:27:a9',

                                      'ipaddr': '172.22.10.100',

                                      'ipaddr6': 'fe80::250:56ff:fe92:27a9',

                                      'netmask': '255.255.255.0',

                                      'netmask6': '64',

                                      'secondary': [{'broadcast': '172.22.10.255',

                                                     'ipaddr': '172.22.10.101',

                                                     'netmask': '255.255.255.0',

                                                     'type': 'inet'},

                                                    {'broadcast': '172.22.10.255',

                                                     'ipaddr': '172.22.10.102',

                                                     'netmask': '255.255.255.0',

                                                     'type': 'inet'}],

                                      'up': True},

                             'lo': {'broadcast': None,

                                    'hwaddr': '00:00:00:00:00:00',

                                    'ipaddr': '127.0.0.1',

                                    'ipaddr6': '::1',

                                    'netmask': '255.0.0.0',

                                    'netmask6': '128',

                                    'up': True}}}

The secondary IP's are what I want...

I can make sure and define that eth0:1 will always be website x, and eth0:2 will be website y...

who do I get the state file to pull those secondary IP's?  

salt['network.interfaces']()['eth0']['secondary'][0]['ipaddr'] 

doesn't seem to work... and I can't figure out what my syntax should be on the cli...

Running in debug from the client looks like:

[INFO    ] Executing command ip addr show in directory /root

[DEBUG   ] output: 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN 

    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00

    inet 127.0.0.1/8 scope host lo

    inet6 ::1/128 scope host 

       valid_lft forever preferred_lft forever

2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000

    link/ether 00:50:56:92:27:a9 brd ff:ff:ff:ff:ff:ff

    inet 172.22.10.100/24 brd 172.22.10.255 scope global eth0

    inet 172.22.10.101/24 brd 172.22.10.255 scope global secondary eth0:1

    inet 172.22.10.102/24 brd 172.22.10.255 scope global secondary eth0:2

    inet6 fe80::250:56ff:fe92:27a9/64 scope link 

       valid_lft forever preferred_lft forever

local:

    Data failed to compile:

----------

    Too many functions declared in state "file" in sls roles.loadbalancer

----------

    Too many functions declared in state "file" in sls roles.loadbalancer

----------

    Too many functions declared in state "file" in sls roles.loadbalancer

to which I tried using: salt['network.interfaces']()['eth0']['secondary']['eth0:1']['ipaddr']

Which results in:

[INFO    ] Executing command ip addr show in directory /root

[DEBUG   ] output: 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN 

    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00

    inet 127.0.0.1/8 scope host lo

    inet6 ::1/128 scope host 

       valid_lft forever preferred_lft forever

2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000

    link/ether 00:50:56:92:27:a9 brd ff:ff:ff:ff:ff:ff

    inet 172.22.10.100/24 brd 172.22.10.255 scope global eth0

    inet 172.22.10.101/24 brd 172.22.10.255 scope global secondary eth0:1

    inet 172.22.10.102/24 brd 172.22.10.255 scope global secondary eth0:2

    inet6 fe80::250:56ff:fe92:27a9/64 scope link 

       valid_lft forever preferred_lft forever

local:

    Data failed to compile:

----------

    Rendering SLS roles.loadbalancer failed, render error:

Traceback (most recent call last):

  File "/usr/lib/pymodules/python2.7/salt/utils/templates.py", line 91, in jinja

    data = template.render(**passthrough)

  File "/usr/lib/python2.7/dist-packages/jinja2/environment.py", line 894, in render

    return self.environment.handle_exception(exc_info, True)

  File "/var/cache/salt/files/base/roles/loadbalancer/init.sls", line 28, in top-level template code

    vhost_ip: {{ salt['network.interfaces']()['eth0']['secondary']['eth0:1']['ipaddr'] }}

  File "/usr/lib/python2.7/dist-packages/jinja2/environment.py", line 353, in getitem

    return obj[argument]

UndefinedError: 'list object' has no attribute 'eth0:1'

Thoughts?

If you think I should approach this differently I'm all ears for that too.

-Mitch

[Vitaliy Fuks]

I filed a bug on this (https://github.com/saltstack/salt/issues/1343) and there has been a pull request merged for it, but it hasn't resolved the actual problem.

--Vitaliy

[Thomas S Hatch]

Yes, this has not been completely fixed yet, basically the aliases don't show up in the output of the function. this is going to require some changes to the returned data structure from the network.interfaces function