Heat templates for deploying OpenStack
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heat_template_version: queens
description: >
Configure os-net-config mappings for specific nodes
Your environment file needs to look like:
parameter_defaults:
NetConfigDataLookup:
node1:
nic1: "00:c8:7c:e6:f0:2e"
node2:
nic1: "00:18:7d:99:0c:b6"
node3:
dmiString: 'system-uuid'
id: 'A8C85861-1B16-4803-8689-AFC62984F8F6'
nic1: em3
# Dell PowerEdge
nodegroup1:
dmiString: "system-product-name"
id: "PowerEdge R630"
nic1: em3
nic2: em1
nic3: em2
# Cisco UCS B200-M4"
nodegroup2:
dmiString: "system-product-name"
id: "UCSB-B200-M4"
nic1: enp7s0
nic2: enp6s0
This will result in the first node* entry where either:
a) a mac matches a local device
or b) a DMI String matches the specified id
being written as a mapping file for os-net-config in
/etc/os-net-config/mapping.yaml
parameters:
# Note this requires a liberty heat or newer in the undercloud due to
# the 2015-10-15 (which is required to enable str_replace serializing
# the json parameter to json, another approch with a string parameter
# will be required for older heat versions)
NetConfigDataLookup:
type: json
default: {}
description: per-node configuration map
resources:
userdata:
type: OS::Heat::MultipartMime
properties:
parts:
- config: {get_resource: OsNetConfigMappings}
OsNetConfigMappings:
type: OS::Heat::SoftwareConfig
properties:
group: ungrouped
config:
str_replace:
template: |
#!/bin/sh
eth_addr=$(cat /sys/class/net/*/address | tr '\n' ',')
mkdir -p /etc/os-net-config
# Create an os-net-config mapping file, note this defaults to
# /etc/os-net-config/mapping.yaml, so we use that name despite
# rendering the result as json
echo '$node_lookup' | python -c "
import json
import sys
import copy
from subprocess import PIPE, Popen
import yaml
def write_mapping_file(interface_mapping):
with open('/etc/os-net-config/mapping.yaml', 'w') as f:
yaml.safe_dump(interface_mapping, f, default_flow_style=False)
# cast to lower case for MAC address match
eth_addr='$eth_addr'.lower()
input = sys.stdin.readline() or '{}'
data = json.loads(input)
for node in data:
interface_mapping = {'interface_mapping':
copy.deepcopy(data[node])}
if 'dmiString' in interface_mapping['interface_mapping']:
del interface_mapping['interface_mapping']['dmiString']
if 'id' in interface_mapping['interface_mapping']:
del interface_mapping['interface_mapping']['id']
# Match on mac addresses first - cast all to lower case
lc_interface_mapping = copy.deepcopy(interface_mapping)
for key,x in lc_interface_mapping['interface_mapping'].items():
lc_interface_mapping['interface_mapping'][key] = x.lower()
if any(x in eth_addr.split(',') for x in lc_interface_mapping['interface_mapping'].values()):
write_mapping_file(lc_interface_mapping)
break
# If data contain dmiString and id keys, try to match node(group)
if 'dmiString' in data[node] and 'id' in data[node]:
ps = Popen([ 'dmidecode',
'--string', data[node].get('dmiString') ],
stdout=PIPE)
out, err = ps.communicate()
if data[node].get('id') == out.rstrip():
write_mapping_file(lc_interface_mapping)
break
"
params:
$node_lookup: {get_param: NetConfigDataLookup}
outputs:
OS::stack_id:
value: {get_resource: userdata}