tripleo-heat-templates/tools/process-templates.py
Dan Sneddon 1dec175241 Render NIC config templates with jinja2
This change converts the existing NIC templates to jinja2 in
order to dynamically render the ports and networks according
to the network_data.yaml. If networks are added to the
network_data.yaml file, parameters will be added to all
NIC templates. The YAML files (as output from jinja with
the default network_data.yaml) are present as an example.

The roles in roles_data.yaml are used to produce NIC configs
for the standard and custom composable roles. In order to
keep the ordering of NICs the same in the multiple-nics
templates, the order of networks was changed in the
network_data.yaml file. This is reflected in the network
templates, and in some of the files that is the only
change.

The roles and roles_data.yaml were modified to include
a legacy name for the NIC config templates for the
built-in roles Controller, Compute, Object Storage,
Block Storage, Ceph Storage, Compute-DPDK, and
Networker roles. There will now be a file produced
with the legacy name, but also one produced with the
<role>-role.j2.yaml format (along with environment
files to help use the new filenames).

Note this change also fixes some typos as well as
a number of templates that had VLANs with device:
entries which were ignored.

Closes-Bug: 1737041
Depends-On: I49c0245c36de3103671080fd1c8cfb3432856f35
Change-Id: I3bdb7d00dab5a023dd8b9c94c0f89f84357ae7a4
2018-02-13 00:19:37 -08:00

324 lines
14 KiB
Python
Executable File

#!/usr/bin/env python
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
import argparse
import jinja2
import os
import shutil
import six
import sys
import yaml
__tht_root_dir = os.path.dirname(os.path.dirname(__file__))
def _shutil_copy_if_not_same(src, dst):
"""Copy with shutil ignoring the same file errors."""
if hasattr(shutil, 'SameFileError'):
try:
shutil.copy(src, dst)
except shutil.SameFileError:
pass
else:
try:
shutil.copy(src, dst)
except Exception as ex:
if 'are the same file' in six.text_type(ex):
pass
else:
raise
def parse_opts(argv):
parser = argparse.ArgumentParser(
description='Configure host network interfaces using a JSON'
' config file format.')
parser.add_argument('-p', '--base_path', metavar='BASE_PATH',
help="""base path of templates to process.""",
default='.')
parser.add_argument('-r', '--roles-data', metavar='ROLES_DATA',
help="""relative path to the roles_data.yaml file.""",
default='roles_data.yaml')
parser.add_argument('-n', '--network-data', metavar='NETWORK_DATA',
help="""relative path to the network_data.yaml file.""",
default='network_data.yaml')
parser.add_argument('--safe',
action='store_true',
help="""Enable safe mode (do not overwrite files).""",
default=False)
parser.add_argument('-o', '--output-dir', metavar='OUTPUT_DIR',
help="""Output dir for all the templates""",
default='')
parser.add_argument('-c', '--clean',
action='store_true',
help=("""clean the templates dir by deleting """
"""generated templates"""))
opts = parser.parse_args(argv[1:])
return opts
def _j2_render_to_file(j2_template, j2_data, outfile_name=None,
overwrite=True):
yaml_f = outfile_name or j2_template.replace('.j2.yaml', '.yaml')
print('rendering j2 template to file: %s' % outfile_name)
if not overwrite and os.path.exists(outfile_name):
print('ERROR: path already exists for file: %s' % outfile_name)
sys.exit(1)
# Search for templates relative to the current template path first
template_base = os.path.dirname(yaml_f)
j2_loader = jinja2.loaders.FileSystemLoader([template_base, __tht_root_dir])
try:
# Render the j2 template
template = jinja2.Environment(loader=j2_loader).from_string(
j2_template)
r_template = template.render(**j2_data)
except jinja2.exceptions.TemplateError as ex:
error_msg = ("Error rendering template %s : %s"
% (yaml_f, six.text_type(ex)))
print(error_msg)
raise Exception(error_msg)
with open(outfile_name, 'w') as out_f:
out_f.write(r_template)
def process_templates(template_path, role_data_path, output_dir,
network_data_path, overwrite):
with open(role_data_path) as role_data_file:
role_data = yaml.safe_load(role_data_file)
with open(network_data_path) as network_data_file:
network_data = yaml.safe_load(network_data_file)
j2_excludes_path = os.path.join(template_path, 'j2_excludes.yaml')
with open(j2_excludes_path) as role_data_file:
j2_excludes = yaml.safe_load(role_data_file)
if output_dir and not os.path.isdir(output_dir):
if os.path.exists(output_dir):
raise RuntimeError('Output dir %s is not a directory' % output_dir)
os.mkdir(output_dir)
role_names = [r.get('name') for r in role_data]
r_map = {}
for r in role_data:
r_map[r.get('name')] = r
n_map = {}
for n in network_data:
if (n.get('enabled') is not False):
n_map[n.get('name')] = n
if not n.get('name_lower'):
n_map[n.get('name')]['name_lower'] = n.get('name').lower()
else:
print("skipping %s network: network is disabled" % n.get('name'))
excl_templates = ['%s/%s' % (template_path, e)
for e in j2_excludes.get('name')]
if os.path.isdir(template_path):
for subdir, dirs, files in os.walk(template_path):
# NOTE(flaper87): Ignore hidden dirs as we don't
# generate templates for those.
# Note the slice assigment for `dirs` is necessary
# because we need to modify the *elements* in the
# dirs list rather than the reference to the list.
# This way we'll make sure os.walk will iterate over
# the shrunk list. os.walk doesn't have an API for
# filtering dirs at this point.
dirs[:] = [d for d in dirs if not d[0] == '.']
files = [f for f in files if not f[0] == '.']
# NOTE(flaper87): We could have used shutil.copytree
# but it requires the dst dir to not be present. This
# approach is safer as it doesn't require us to delete
# the output_dir in advance and it allows for running
# the command multiple times with the same output_dir.
out_dir = subdir
if output_dir:
out_dir = os.path.join(output_dir, subdir)
if not os.path.exists(out_dir):
os.mkdir(out_dir)
# Ensure template is on its expected search path
# for upcoming parsing and rendering
for f in files:
if f.endswith('.j2') and output_dir:
_shutil_copy_if_not_same(os.path.join(subdir, f), out_dir)
for f in files:
file_path = os.path.join(subdir, f)
# We do three templating passes here:
# 1. *.role.j2.yaml - we template just the role name
# and create multiple files (one per role)
# 2 *.network.j2.yaml - we template the network name and
# data and create multiple files for networks and
# network ports (one per network)
# 3. *.j2.yaml - we template with all roles_data,
# and create one file common to all roles
if f.endswith('.role.j2.yaml'):
print("jinja2 rendering role template %s" % f)
with open(file_path) as j2_template:
template_data = j2_template.read()
print("jinja2 rendering roles %s" % ","
.join(role_names))
for role in role_names:
j2_data = {'role': r_map[role]}
out_f = "-".join(
[role.lower(),
os.path.basename(f).replace('.role.j2.yaml',
'.yaml')])
out_f_path = os.path.join(out_dir, out_f)
if ('network/config' in file_path and
r_map[role].get('deprecated_nic_config_name')):
d_name = r_map[role].get(
'deprecated_nic_config_name')
out_f_path = os.path.join(out_dir, d_name)
elif ('network/config' in file_path):
d_name = "%s.yaml" % role.lower()
out_f_path = os.path.join(out_dir, d_name)
if not (out_f_path in excl_templates):
if '{{role.name}}' in template_data:
j2_data = {'role': r_map[role],
'networks': network_data}
_j2_render_to_file(template_data, j2_data,
out_f_path, overwrite)
else:
# Backwards compatibility with templates
# that specify {{role}} vs {{role.name}}
j2_data = {'role': role,
'networks': network_data}
# (dprince) For the undercloud installer we
# don'twant to have heat check nova/glance
# API's
if r_map[role].get('disable_constraints',
False):
j2_data['disable_constraints'] = True
_j2_render_to_file(
template_data, j2_data,
out_f_path, overwrite)
else:
print('skipping rendering of %s' % out_f_path)
elif f.endswith('.network.j2.yaml'):
print("jinja2 rendering network template %s" % f)
with open(file_path) as j2_template:
template_data = j2_template.read()
print("jinja2 rendering networks %s" % ",".join(n_map))
for network in n_map:
j2_data = {'network': n_map[network]}
# Output file names in "<name>.yaml" format
out_f = os.path.basename(f).replace('.network.j2.yaml',
'.yaml')
if os.path.dirname(file_path).endswith('ports'):
out_f = out_f.replace('port',
n_map[network]['name_lower'])
else:
out_f = out_f.replace('network',
n_map[network]['name_lower'])
out_f_path = os.path.join(out_dir, out_f)
if not (out_f_path in excl_templates):
_j2_render_to_file(template_data, j2_data,
out_f_path)
else:
print('skipping rendering of %s' % out_f_path)
elif f.endswith('.j2.yaml'):
print("jinja2 rendering normal template %s" % f)
with open(file_path) as j2_template:
template_data = j2_template.read()
j2_data = {'roles': role_data,
'networks': network_data}
out_f = os.path.basename(f).replace('.j2.yaml', '.yaml')
out_f_path = os.path.join(out_dir, out_f)
_j2_render_to_file(template_data, j2_data, out_f_path,
overwrite)
elif output_dir:
_shutil_copy_if_not_same(os.path.join(subdir, f), out_dir)
else:
print('Unexpected argument %s' % template_path)
def clean_templates(base_path, role_data_path, network_data_path):
def delete(f):
if os.path.exists(f):
print("Deleting %s" % f)
os.unlink(f)
for root, dirs, files in os.walk(base_path):
for f in files:
if f.endswith('.j2.yaml'):
rendered_path = os.path.join(
root, '%s.yaml' % f.split('.j2.yaml')[0])
delete(rendered_path)
with open(network_data_path) as network_data_file:
network_data = yaml.safe_load(network_data_file)
for network in network_data:
network_path = os.path.join(
'network', '%s.yaml' % network['name_lower'])
network_from_pool_path = os.path.join(
'network', '%s_from_pool.yaml' % network['name_lower'])
network_v6_path = os.path.join(
'network', '%s_v6.yaml' % network['name_lower'])
network_from_pool_v6_path = os.path.join(
'network', '%s_from_pool_v6.yaml' % network['name_lower'])
ports_path = os.path.join(
'network', 'ports', '%s.yaml' % network['name_lower'])
ports_from_pool_path = os.path.join(
'network', 'ports', '%s_from_pool.yaml' % network['name_lower'])
ports_v6_path = os.path.join(
'network', 'ports', '%s_v6.yaml' % network['name_lower'])
ports_from_pool_v6_path = os.path.join(
'network', 'ports', '%s_from_pool_v6.yaml' % network['name_lower'])
delete(network_path)
delete(network_from_pool_path)
delete(network_v6_path)
delete(network_from_pool_v6_path)
delete(ports_path)
delete(ports_from_pool_path)
delete(ports_v6_path)
delete(ports_from_pool_v6_path)
with open(role_data_path) as role_data_file:
role_data = yaml.safe_load(role_data_file)
for role in role_data:
role_path = os.path.join(
'puppet', '%s-role.yaml' % role['name'].lower())
host_config_and_reboot_path = os.path.join(
'extraconfig', 'pre_network',
'%s-host_config_and_reboot.yaml' % role['name'].lower())
delete(role_path)
delete(host_config_and_reboot_path)
opts = parse_opts(sys.argv)
role_data_path = os.path.join(opts.base_path, opts.roles_data)
network_data_path = os.path.join(opts.base_path, opts.network_data)
if opts.clean:
clean_templates(opts.base_path, role_data_path, network_data_path)
else:
process_templates(opts.base_path, role_data_path, opts.output_dir,
network_data_path, (not opts.safe))