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https://github.com/kevinveenbirkenbach/computer-playbook.git
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Finished role creator
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@ -3,10 +3,10 @@ import argparse
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import os
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import shutil
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import sys
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import yaml
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import ipaddress
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import difflib
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from jinja2 import Environment, FileSystemLoader
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from ruamel.yaml import YAML
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# Paths to the group-vars files
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PORTS_FILE = './group_vars/all/09_ports.yml'
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@ -14,43 +14,48 @@ NETWORKS_FILE = './group_vars/all/10_networks.yml'
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ROLE_TEMPLATE_DIR = './templates/docker_role'
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ROLES_DIR = './roles'
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yaml = YAML()
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yaml.preserve_quotes = True
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def load_yaml(path):
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def load_yaml_with_comments(path):
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with open(path) as f:
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return yaml.safe_load(f)
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return yaml.load(f)
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def dump_yaml(data, path):
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def dump_yaml_with_comments(data, path):
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with open(path, 'w') as f:
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yaml.safe_dump(data, f, sort_keys=False)
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yaml.dump(data, f)
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def get_next_network(networks_dict, prefixlen):
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"""Select the next contiguous subnet by taking the highest existing subnet and adding one network-size offset."""
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"""Select the next contiguous subnet, based on the highest existing subnet + one network offset."""
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nets = []
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for info in networks_dict['defaults_networks']['local'].values():
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local = networks_dict['defaults_networks']['local']
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for name, info in local.items():
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# info is a dict with 'subnet' key
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net = ipaddress.ip_network(info['subnet'])
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if net.prefixlen == prefixlen:
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nets.append(net)
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if not nets:
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raise RuntimeError(f"No existing /{prefixlen} networks to base allocation on.")
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raise RuntimeError(f"No existing /{prefixlen} subnets to base allocation on.")
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nets.sort(key=lambda n: int(n.network_address))
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last = nets[-1]
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offset = last.num_addresses
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next_network_address = int(last.network_address) + offset
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return ipaddress.ip_network((next_network_address, prefixlen))
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next_net = ipaddress.ip_network((int(last.network_address) + offset, prefixlen))
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return next_net
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def get_next_port(ports_dict, category):
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"""Assign the next port by taking max existing and adding one."""
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existing = [int(p) for p in ports_dict['ports']['localhost'].get(category, {}).values()]
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"""Assign the next port by taking the max existing plus one."""
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loc = ports_dict['ports']['localhost'][category]
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existing = [int(v) for v in loc.values()]
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return (max(existing) + 1) if existing else 1
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def prompt_conflict(dst_file):
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"""Prompt the user to resolve a file conflict."""
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print(f"Conflict detected: {dst_file}")
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print("Choose action: [1] overwrite, [2] skip, [3] merge")
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print("[1] overwrite, [2] skip, [3] merge")
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choice = None
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while choice not in ('1', '2', '3'):
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choice = input("Enter 1, 2, or 3: ").strip()
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@ -58,12 +63,7 @@ def prompt_conflict(dst_file):
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def render_templates(src_dir, dst_dir, context):
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"""Recursively render all templates from src_dir into dst_dir, handling conflicts."""
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env = Environment(
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loader=FileSystemLoader(src_dir),
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keep_trailing_newline=True,
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autoescape=False,
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)
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env = Environment(loader=FileSystemLoader(src_dir), keep_trailing_newline=True, autoescape=False)
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env.filters['bool'] = lambda x: bool(x)
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for root, _, files in os.walk(src_dir):
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@ -73,89 +73,91 @@ def render_templates(src_dir, dst_dir, context):
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for fn in files:
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tpl = env.get_template(os.path.join(rel, fn))
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rendered = tpl.render(**context)
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out_name = fn[:-3] if fn.endswith('.j2') else fn
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dst_file = os.path.join(target, out_name)
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out = fn[:-3] if fn.endswith('.j2') else fn
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dst_file = os.path.join(target, out)
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if os.path.exists(dst_file):
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choice = prompt_conflict(dst_file)
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if choice == '2': # skip
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if choice == '2':
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print(f"Skipping {dst_file}")
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continue
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if choice == '3': # merge: append lines not present
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if choice == '3':
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with open(dst_file) as f_old:
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old = f_old.readlines()
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new = rendered.splitlines(keepends=True)
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add = [l for l in new if l not in old]
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if add:
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old_lines = f_old.readlines()
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new_lines = rendered.splitlines(keepends=True)
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additions = [l for l in new_lines if l not in old_lines]
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if additions:
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with open(dst_file, 'a') as f:
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f.writelines(add)
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print(f"Merged {len(add)} new lines into {dst_file}")
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f.writelines(additions)
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print(f"Merged {len(additions)} lines into {dst_file}")
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else:
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print(f"Nothing new to merge in {dst_file}")
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print(f"No new lines to merge into {dst_file}")
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continue
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# overwrite
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print(f"Overwriting {dst_file}")
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with open(dst_file, 'w') as f:
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f.write(rendered)
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else:
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# new file
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# create new file
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with open(dst_file, 'w') as f:
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f.write(rendered)
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def main():
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# load dynamic port categories
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ports_yaml = load_yaml(PORTS_FILE)
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categories = list(ports_yaml.get('ports', {}).get('localhost', {}).keys())
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# Load dynamic port categories
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ports_data = load_yaml_with_comments(PORTS_FILE)
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categories = list(ports_data['ports']['localhost'].keys())
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parser = argparse.ArgumentParser(
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description="Create or update a Docker Ansible role, assign network and ports globally"
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description="Create or update a Docker Ansible role, and globally assign network and ports with comments preserved"
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)
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parser.add_argument('-a', '--application-id', required=True, help="Unique application ID")
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parser.add_argument('-n', '--network', choices=['24', '28'], required=True,
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help="Network prefix length (/24 or /28)")
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parser.add_argument('-p', '--ports', nargs='+', choices=categories, required=True,
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help=f"Port categories to assign (allowed: {', '.join(categories)})")
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parser.add_argument('-n', '--network', choices=['24', '28'], required=True, help="Network prefix length (/24 or /28)")
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parser.add_argument('-p', '--ports', nargs='+', choices=categories, required=True, help=f"Port categories to assign (allowed: {', '.join(categories)})")
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args = parser.parse_args()
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app = args.application_id
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role = f"docker-{app}"
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role_dir = os.path.join(ROLES_DIR, role)
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# ensure role dir exists, prompt if updating
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if os.path.exists(role_dir):
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if input(f"Role {role} exists. Continue update? [y/N]: ").strip().lower() != 'y':
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print("Aborted.")
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if input(f"Role {role} exists. Continue? [y/N]: ").strip().lower() != 'y':
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print("Aborting.")
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sys.exit(1)
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else:
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os.makedirs(role_dir)
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# 1) render templates
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render_templates(ROLE_TEMPLATE_DIR, role_dir, {'application_id': app,
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'role_name': role,
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'database_type': 0})
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# 1) Render all templates with conflict handling
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render_templates(ROLE_TEMPLATE_DIR, role_dir, {'application_id': app, 'role_name': role, 'database_type': 0})
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print(f"→ Templates applied to {role_dir}")
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# 2) assign and update global networks
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nets = load_yaml(NETWORKS_FILE)
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net = get_next_network(nets, int(args.network))
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nets['defaults_networks']['local'][app] = str(net)
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dump_yaml(nets, NETWORKS_FILE)
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print(f"→ Assigned network {net} to {app} in {NETWORKS_FILE}")
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# 2) Update global networks file, preserving comments
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networks = load_yaml_with_comments(NETWORKS_FILE)
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prefix = int(args.network)
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new_net = get_next_network(networks, prefix)
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networks['defaults_networks']['local'][app] = {'subnet': str(new_net)}
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shutil.copy(NETWORKS_FILE, NETWORKS_FILE + '.bak')
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dump_yaml_with_comments(networks, NETWORKS_FILE)
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print(f"→ Assigned network {new_net} in {NETWORKS_FILE}")
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# 3) assign and update global ports
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# 3) Update global ports file, preserving comments
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ports_data = load_yaml_with_comments(PORTS_FILE)
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assigned = {}
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for cat in args.ports:
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port = get_next_port(ports_yaml, cat)
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ports_yaml['ports']['localhost'].setdefault(cat, {})[app] = port
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assigned[cat] = port
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loc = ports_data['ports']['localhost'].setdefault(cat, {})
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if app in loc:
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print(f"→ Existing port for {cat} and {app}: {loc[app]}, skipping.")
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else:
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pnum = get_next_port(ports_data, cat)
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loc[app] = pnum
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assigned[cat] = pnum
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if assigned:
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shutil.copy(PORTS_FILE, PORTS_FILE + '.bak')
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dump_yaml(ports_yaml, PORTS_FILE)
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print(f"→ Assigned ports {assigned} for {app} in {PORTS_FILE}")
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dump_yaml_with_comments(ports_data, PORTS_FILE)
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print(f"→ Assigned ports {assigned} in {PORTS_FILE}")
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else:
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print("→ No ports assigned (already existed)")
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print("→ No new ports assigned.")
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if __name__ == '__main__':
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main()
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