firstboot/os-net-config-mappings.yaml

   1 heat_template_version: pike
   2
   3 description: >
   4   Configure os-net-config mappings for specific nodes
   5   Your environment file needs to look like:
   6     parameter_defaults:
   7       NetConfigDataLookup:
   8         node1:
   9           nic1: "00:c8:7c:e6:f0:2e"
  10         node2:
  11           nic1: "00:18:7d:99:0c:b6"
  12         node3:
  13           dmiString: 'system-uuid'
  14           id: 'A8C85861-1B16-4803-8689-AFC62984F8F6'
  15           nic1: em3
  16         # Dell PowerEdge
  17         nodegroup1:
  18           dmiString: "system-product-name"
  19           id: "PowerEdge R630"
  20           nic1: em3
  21           nic2: em1
  22           nic3: em2
  23         # Cisco UCS B200-M4"
  24         nodegroup2:
  25           dmiString: "system-product-name"
  26           id: "UCSB-B200-M4"
  27           nic1: enp7s0
  28           nic2: enp6s0
  29
  30   This will result in the first node* entry where either:
  31        a) a mac matches a local device
  32     or b) a DMI String matches the specified id
  33   being written as a mapping file for os-net-config in
  34   /etc/os-net-config/mapping.yaml
  35
  36 parameters:
  37   # Note this requires a liberty heat or newer in the undercloud due to
  38   # the 2015-10-15 (which is required to enable str_replace serializing
  39   # the json parameter to json, another approch with a string parameter
  40   # will be required for older heat versions)
  41   NetConfigDataLookup:
  42     type: json
  43     default: {}
  44     description: per-node configuration map
  45
  46 resources:
  47   userdata:
  48     type: OS::Heat::MultipartMime
  49     properties:
  50       parts:
  51       - config: {get_resource: OsNetConfigMappings}
  52
  53   OsNetConfigMappings:
  54     type: OS::Heat::SoftwareConfig
  55     properties:
  56       group: ungrouped
  57       config:
  58         str_replace:
  59           template: |
  60             #!/bin/sh
  61             eth_addr=$(cat /sys/class/net/*/address | tr '\n' ',')
  62             mkdir -p /etc/os-net-config
  63
  64             # Create an os-net-config mapping file, note this defaults to
  65             # /etc/os-net-config/mapping.yaml, so we use that name despite
  66             # rendering the result as json
  67             echo '$node_lookup' | python -c "
  68             import json
  69             import sys
  70             import copy
  71             from subprocess import PIPE, Popen
  72             import yaml
  73
  74             def write_mapping_file(interface_mapping):
  75               with open('/etc/os-net-config/mapping.yaml', 'w') as f:
  76                 yaml.safe_dump(interface_mapping, f,  default_flow_style=False)
  77
  78             input = sys.stdin.readline() or '{}'
  79             data = json.loads(input)
  80             for node in data:
  81               interface_mapping = {'interface_mapping':
  82                                       copy.deepcopy(data[node])}
  83               if 'dmiString' in interface_mapping['interface_mapping']:
  84                 del interface_mapping['interface_mapping']['dmiString']
  85               if 'id' in interface_mapping['interface_mapping']:
  86                 del interface_mapping['interface_mapping']['id']
  87               # Match on mac addresses first
  88               if any(x in '$eth_addr'.split(',') for x in data[node].values()):
  89                 write_mapping_file(interface_mapping)
  90                 break
  91               # If data contain dmiString and id keys, try to match node(group)
  92               if 'dmiString' in data[node] and 'id' in data[node]:
  93                 ps = Popen([ 'dmidecode',
  94                              '--string', data[node].get('dmiString') ],
  95                              stdout=PIPE)
  96                 out, err = ps.communicate()
  97                 if data[node].get('id') == out.rstrip():
  98                   write_mapping_file(interface_mapping)
  99                   break
 100             "
 101           params:
 102             $node_lookup: {get_param: NetConfigDataLookup}
 103
 104 outputs:
 105   OS::stack_id:
 106     value: {get_resource: userdata}