206 lines
8.6 KiB
Python
Executable File
206 lines
8.6 KiB
Python
Executable File
#!/usr/bin/env python3
|
|
import asyncio
|
|
import ecs_logging
|
|
import logging
|
|
import os
|
|
import random
|
|
import string
|
|
import yaml
|
|
from kubernetes_asyncio.client.api_client import ApiClient
|
|
from kubernetes_asyncio import client, config, watch
|
|
from time import time
|
|
import argparse
|
|
|
|
# Get the Logger
|
|
logger = logging.getLogger()
|
|
logger.setLevel(logging.DEBUG)
|
|
|
|
# Add an ECS formatter to the Handler
|
|
handler = logging.StreamHandler()
|
|
handler.setFormatter(ecs_logging.StdlibFormatter())
|
|
logger.addHandler(handler)
|
|
|
|
parser = argparse.ArgumentParser(description="Run handler for ClusterOperator CRD")
|
|
parser.add_argument("--target", "-t", default="meta")
|
|
args = parser.parse_args()
|
|
|
|
MY_POD_NAMESPACE = os.environ["MY_POD_NAMESPACE"]
|
|
LABEL_MANAGED_BY = "meta-operator"
|
|
|
|
|
|
async def cleanup(v1, apps_api, label_selector, delay=0):
|
|
ls = ",".join(label_selector)
|
|
if delay:
|
|
await asyncio.sleep(delay)
|
|
logger.info("Cleaning up %s" % ls)
|
|
|
|
# Clean up services
|
|
resp = await v1.list_namespaced_service("", label_selector=ls)
|
|
for i in resp.items:
|
|
logger.info("Removing service: %s/%s", i.metadata.namespace, i.metadata.name)
|
|
await v1.delete_namespaced_service(i.metadata.name, i.metadata.namespace)
|
|
|
|
# Clean up deployments
|
|
resp = await apps_api.list_namespaced_deployment("", label_selector=ls)
|
|
for i in resp.items:
|
|
logger.info("Removing deployment: %s/%s", i.metadata.namespace, i.metadata.name)
|
|
await apps_api.delete_namespaced_deployment(i.metadata.name, i.metadata.namespace)
|
|
|
|
# Clean up statefulsets
|
|
resp = await apps_api.list_namespaced_stateful_set("", label_selector=ls)
|
|
for i in resp.items:
|
|
logger.info("Removing statefulset: %s/%s", i.metadata.namespace, i.metadata.name)
|
|
await apps_api.delete_namespaced_stateful_set(i.metadata.name, i.metadata.namespace)
|
|
|
|
# Clean up configmaps
|
|
resp = await v1.list_namespaced_config_map("", label_selector=ls)
|
|
for i in resp.items:
|
|
logger.info("Removing configmap: %s/%s", i.metadata.namespace, i.metadata.name)
|
|
await v1.delete_namespaced_config_map(i.metadata.name, i.metadata.namespace)
|
|
|
|
# Clean up secrets
|
|
resp = await v1.list_namespaced_secret("", label_selector=ls)
|
|
for i in resp.items:
|
|
logger.info("Removing secret: %s/%s", i.metadata.namespace, i.metadata.name)
|
|
await v1.delete_namespaced_secret(i.metadata.name, i.metadata.namespace)
|
|
|
|
|
|
async def apply_changes(operator, item, v1, revision, apps_api, api_instance):
|
|
namespace = item["metadata"].get("namespace", MY_POD_NAMESPACE)
|
|
name = item["metadata"]["name"]
|
|
logger.info("Applying changes for %s in namespace %s", name, namespace)
|
|
if namespace == "meta-operator" and name == "meta":
|
|
logger.info("Not touching myself")
|
|
return
|
|
labels = {
|
|
"codemowers.io/revision": revision,
|
|
"codemowers.io/resource-name": name,
|
|
"codemowers.io/resource-group": operator["spec"]["resource"]["group"],
|
|
"codemowers.io/resource-version": operator["spec"]["resource"]["version"],
|
|
"codemowers.io/resource-plural": operator["spec"]["resource"]["plural"],
|
|
"app.kubernetes.io/managed-by": LABEL_MANAGED_BY,
|
|
}
|
|
replicas = item["spec"].get("replicas")
|
|
if operator["spec"].get("secret", {}).get("enabled"):
|
|
secret_name = operator["spec"]["secret"]["name"].replace("foobar", item["metadata"]["name"])
|
|
password = "".join([random.choice(string.ascii_letters + string.digits) for j in range(20)])
|
|
data = {}
|
|
for o in operator["spec"]["secret"]["structure"]:
|
|
data[o["key"]] = o["value"].replace("foobar", item["metadata"]["name"]) % password
|
|
try:
|
|
await v1.create_namespaced_secret(namespace, {
|
|
"metadata": {"name": secret_name},
|
|
"stringData": data
|
|
})
|
|
except client.exceptions.ApiException:
|
|
logger.info("Secret already generated, adding labels")
|
|
await v1.patch_namespaced_secret(secret_name, namespace, {
|
|
"metadata": {"labels": labels}
|
|
})
|
|
else:
|
|
logger.info("Secret generation disabled")
|
|
|
|
def transform_template(iterable):
|
|
for i in iterable:
|
|
body = yaml.safe_load(yaml.dump(i).replace("foobar", item["metadata"]["name"]))
|
|
if "labels" not in body["metadata"]:
|
|
body["metadata"]["labels"] = {}
|
|
body["metadata"]["labels"].update(labels)
|
|
yield body["metadata"]["name"], body
|
|
|
|
# Generate Services
|
|
for name, body in transform_template(operator["spec"].get("services", [])):
|
|
try:
|
|
await v1.replace_namespaced_service(name, namespace, body)
|
|
logger.info("Updated service %s/%s", namespace, name)
|
|
except client.exceptions.ApiException:
|
|
await v1.create_namespaced_service(namespace, body)
|
|
logger.info("Created service %s/%s", namespace, name)
|
|
|
|
# Generate ConfigMaps
|
|
for name, body in transform_template(operator["spec"].get("configmaps", [])):
|
|
try:
|
|
await v1.replace_namespaced_config_map(name, namespace, body)
|
|
logger.info("Updated configmap %s/%s", namespace, name)
|
|
except client.exceptions.ApiException:
|
|
await v1.create_namespaced_config_map(namespace, body)
|
|
logger.info("Created configmap %s/%s", namespace, name)
|
|
|
|
# Generate Deployments
|
|
for name, body in transform_template(operator["spec"].get("deployments", [])):
|
|
if replicas:
|
|
body["spec"]["replicas"] = replicas
|
|
try:
|
|
await apps_api.replace_namespaced_deployment(name, namespace, body)
|
|
logger.info("Updated deployment %s/%s", namespace, name)
|
|
except client.exceptions.ApiException:
|
|
await apps_api.create_namespaced_deployment(namespace, body)
|
|
logger.info("Created deployment %s/%s", namespace, name)
|
|
|
|
# Generate statefulsets
|
|
for name, body in transform_template(operator["spec"].get("statefulsets", [])):
|
|
if replicas:
|
|
body["spec"]["replicas"] = replicas
|
|
try:
|
|
await apps_api.replace_namespaced_stateful_set(name, namespace, body)
|
|
logger.info("Updated statefulset %s/%s", namespace, name)
|
|
except client.exceptions.ApiException:
|
|
await apps_api.create_namespaced_stateful_set(namespace, body)
|
|
logger.info("Created statefulset %s/%s", namespace, name)
|
|
|
|
|
|
async def update_loop(v1, apps_api, api_instance, revision):
|
|
logger.info("Managing resources for ClusterOperator named %s", repr(args.target))
|
|
operator = await api_instance.get_cluster_custom_object("codemowers.io", "v1alpha1", "clusteroperators", args.target)
|
|
label_selector = (
|
|
"app.kubernetes.io/managed-by==%s" % LABEL_MANAGED_BY,
|
|
"codemowers.io/resource-group==%s" % operator["spec"]["resource"]["group"],
|
|
"codemowers.io/resource-version==%s" % operator["spec"]["resource"]["version"],
|
|
"codemowers.io/resource-plural==%s" % operator["spec"]["resource"]["plural"]
|
|
)
|
|
flt = operator["spec"]["resource"]["group"], operator["spec"]["resource"]["version"], \
|
|
"", operator["spec"]["resource"]["plural"]
|
|
|
|
method = api_instance.list_namespaced_custom_object
|
|
logger.info("Subscribing to %(plural)s.%(group)s/%(version)s updates", operator["spec"]["resource"])
|
|
w = watch.Watch()
|
|
latest_version = None
|
|
|
|
task = None
|
|
|
|
async for event in w.stream(method, *flt, resource_version=latest_version):
|
|
latest_version = event["object"]["metadata"]["resourceVersion"]
|
|
if event["type"] == "ADDED":
|
|
await apply_changes(operator, event["object"], v1, revision, apps_api, api_instance)
|
|
if task:
|
|
task.cancel()
|
|
task = asyncio.create_task(cleanup(v1, apps_api,
|
|
label_selector + ("codemowers.io/revision!=%s" % revision,),
|
|
delay=2))
|
|
elif event["type"] == "DELETED":
|
|
asyncio.create_task(cleanup(v1, apps_api,
|
|
label_selector + ("codemowers.io/resource-name==%s" % event["object"]["metadata"]["name"],)))
|
|
|
|
|
|
async def main():
|
|
if os.getenv("KUBECONFIG"):
|
|
await config.load_kube_config()
|
|
else:
|
|
config.load_incluster_config()
|
|
async with ApiClient() as api:
|
|
v1 = client.CoreV1Api(api)
|
|
apps_api = client.AppsV1Api()
|
|
api_instance = client.CustomObjectsApi(api)
|
|
revision = str(time())
|
|
while True:
|
|
try:
|
|
await update_loop(v1, apps_api, api_instance, revision)
|
|
except asyncio.exceptions.TimeoutError:
|
|
pass
|
|
|
|
|
|
if __name__ == "__main__":
|
|
loop = asyncio.new_event_loop()
|
|
loop.run_until_complete(main())
|
|
loop.close()
|