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Add example of creating per-node os-net-config mappings

Adds an example of proving a mapping file for all nodes, then
extracting the data for each node based on a lookup of the mac address.

Some assumptions are made (e.g the hard-coded reference to eth0), but
it should be easily modified to suit specific environments.

Usage via an enviroment file will look like:

resource_registry:
  OS::TripleO::NodeUserData: os-net-config-mappings.yaml
parameter_defaults:
  NetConfigDataLookup:
    host1:
      nic1: "00:c8:7c:e6:f0:2e"
    host2:
      nic1: "00:18:7d:99:0c:b6"

Note this version requires liberty heat in the undercloud due to the
use of a new str_replace feature to serialize the json parameter.

Change-Id: I7da9c9d8805e676a383e888a7d77f05d3432ab12
changes/14/265014/3
Steven Hardy 7 years ago
parent
commit
8a0f5efc1a
  1. 65
      firstboot/os-net-config-mappings.yaml

65
firstboot/os-net-config-mappings.yaml

@ -0,0 +1,65 @@
heat_template_version: 2015-10-15
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"
This will result in the first nodeN entry where a mac matches a
local device 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=$(/sbin/ifconfig eth0 | grep ether | awk '{print $2}')
mkdir -p /etc/os-net-config
# Create an os-net-config mapping file, note this defaults to
# /etc/os-net-config/mapping.yaml, so we use that name despite
# rendering the result as json
echo '$node_lookup' | python -c "
import json
import sys
import yaml
input = sys.stdin.readline() or '{}'
data = json.loads(input)
for node in data:
if '${eth_addr}' in data[node].values():
interface_mapping = {'interface_mapping': data[node]}
with open('/etc/os-net-config/mapping.yaml', 'w') as f:
yaml.safe_dump(interface_mapping, f, default_flow_style=False)
break
"
params:
$node_lookup: {get_param: NetConfigDataLookup}
outputs:
OS::stack_id:
value: {get_resource: userdata}
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