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from collections import defaultdict |
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import concurrent.futures |
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import kytos.core.tag_ranges as range_helpers |
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# Change to False so this script makes changes |
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DRY_RUN = True |
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# Modify with VLAN ranges being retired from use |
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RETIRED_VLANS = [[4095, 4095]] |
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View Code Duplication |
def disable_evc(evc_id): |
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import httpx |
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MEF_ELINE_URL = 'http://localhost:8181/api/kytos/mef_eline/v2' |
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url = f"{MEF_ELINE_URL}/evc/{evc_id}" |
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data = { |
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"enabled": False |
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} |
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try: |
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res = httpx.request("PATCH", url, json=data, timeout=30) |
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except httpx.TimeoutException: |
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print(f"Timeout while enabling EVC {evc_id}") |
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if res.is_server_error or res.status_code in {424, 404, 400}: |
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print(f"Error disabling EVC {evc_id}: {res.text}") |
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View Code Duplication |
def enable_evc(evc_id): |
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import httpx |
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MEF_ELINE_URL = 'http://localhost:8181/api/kytos/mef_eline/v2' |
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url = f"{MEF_ELINE_URL}/evc/{evc_id}" |
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data = { |
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"enabled": True |
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} |
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try: |
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res = httpx.request("PATCH", url, json=data, timeout=30) |
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except httpx.TimeoutException: |
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print(f"Timeout while enabling EVC {evc_id}") |
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if res.is_server_error or res.status_code in {424, 404, 400}: |
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print(f"Error enabling EVC {evc_id}: {res.text}") |
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mef_eline = controller.napps[("kytos", "mef_eline")] |
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of_lldp = controller.napps[('kytos', 'of_lldp')] |
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topology = controller.napps[('kytos', 'topology')] |
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evcs = { |
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evc_id: evc.as_dict() |
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for evc_id, evc in mef_eline.circuits.items() |
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if not evc.archived |
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} |
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in_use_tags = defaultdict(list) |
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for evc_id, evc in evcs.items(): |
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for link in evc["current_path"]: |
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svlan = link["metadata"]["s_vlan"]["value"] |
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intfa = link["endpoint_a"]["id"] |
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intfb = link["endpoint_b"]["id"] |
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in_use_tags[intfa].append((svlan, evc_id)) |
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in_use_tags[intfb].append((svlan, evc_id)) |
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for link in evc["failover_path"]: |
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svlan = link["metadata"]["s_vlan"]["value"] |
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intfa = link["endpoint_a"]["id"] |
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intfb = link["endpoint_b"]["id"] |
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in_use_tags[intfa].append((svlan, evc_id)) |
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in_use_tags[intfb].append((svlan, evc_id)) |
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for uni in ("uni_a", "uni_z"): |
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intf_id = evc[uni]["interface_id"] |
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View Code Duplication |
if ( |
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"tag" in evc[uni] |
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and evc[uni]["tag"] |
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and "tag_type" in evc[uni]["tag"] |
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and evc[uni]["tag"]["tag_type"] in ("vlan", 1) |
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): |
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tag = evc[uni]["tag"]["value"] |
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if isinstance(tag, int): |
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in_use_tags[intf_id].append((tag, evc_id)) |
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elif isinstance(tag, list): |
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for tag_item in tag: |
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if isinstance(tag_item, int): |
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in_use_tags[intf_id].append((tag_item, evc_id)) |
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elif isinstance(tag_item, list) and len(tag_item) == 1: |
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in_use_tags[intf_id].append((tag_item[0], evc_id)) |
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elif isinstance(tag_item, list) and len(tag_item) == 2: |
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for val in range(tag_item[0], tag_item[1]+1): |
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in_use_tags[intf_id].append((val, evc_id)) |
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evc_disable_set = set() |
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dry_run_key = "WILL" if not DRY_RUN else "WOULD" |
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print("Checking EVCs for vlan usage...") |
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# Find all evcs to temporarily disable |
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for intf_id in in_use_tags: |
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for tag, evc_id in in_use_tags[intf_id]: |
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if evc_id in evc_disable_set: |
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continue |
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intersect = range_helpers.range_intersection([[tag, tag]], RETIRED_VLANS) |
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intersect = list(intersect) |
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if intersect: |
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print( |
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f"EVC {evc_id} is using s_vlan {intersect} which is pending retirement, {dry_run_key} temporarily disable it..." |
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) |
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evc_disable_set.add(evc_id) |
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# Disable EVCs |
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if not DRY_RUN and evc_disable_set: |
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print("Disabling EVCs...") |
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executor = concurrent.futures.ThreadPoolExecutor(10, "script:disable_evc") |
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executor.map(disable_evc, evc_disable_set) |
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executor.shutdown() |
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# Retire the given vlan ranges |
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if not DRY_RUN: |
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print("Clearing vlan from tag_ranges and available_tags") |
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else: |
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print("Checking interfaces for vlan usage...") |
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for dpid in list(controller.switches.keys()): |
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switch = controller.get_switch_by_dpid(dpid) |
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for intf_id, intf in switch.interfaces.copy().items(): |
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with intf._tag_lock: |
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old_range = intf.tag_ranges['vlan'] |
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used_tags = range_helpers.range_difference( |
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old_range, intf.available_tags['vlan'] |
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) |
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new_range = range_helpers.range_difference( |
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old_range, RETIRED_VLANS |
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) |
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missing = range_helpers.range_difference( |
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used_tags, new_range |
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) |
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if missing: |
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if not DRY_RUN: |
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print( |
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f"WARNING: Interface {dpid} {intf_id} still has the vlans {missing} in use. Can't retire vlans." |
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) |
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else: |
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print( |
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f"Interface {dpid} {intf_id} has the vlans {missing} in use." |
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) |
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continue |
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change = range_helpers.range_difference( |
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old_range, new_range |
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) |
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if not DRY_RUN and change: |
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new_available_tags = range_helpers.range_difference( |
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new_range, used_tags |
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) |
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intf.available_tags['vlan'] = new_available_tags |
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intf.tag_ranges['vlan'] = new_range |
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topology.handle_on_interface_tags(intf) |
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# Re-enable the evcs |
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if not DRY_RUN and evc_disable_set: |
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print("Re-enabling EVCs...") |
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executor = concurrent.futures.ThreadPoolExecutor(10, "script:enable_evc") |
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executor.map(enable_evc, evc_disable_set) |
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executor.shutdown() |
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print("Finished!") |
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kytos-ng /
topology
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