mirror of
https://github.com/openappsec/attachment.git
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Kong k8s (#38)
* make the webhook generic * add service account * change variable name * remove the comments --------- Co-authored-by: wiaamm <wiaamm@checkpoint.com>
This commit is contained in:
Daniel-Eisenberg
GitHub
parent
c59e4d0e76
commit
479f605800
@ -15,6 +15,7 @@ app = Flask(__name__)
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AGENT_IMAGE = os.getenv('AGENT_IMAGE', 'ghcr.io/openappsec/agent')
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AGENT_TAG = os.getenv('AGENT_TAG', 'latest')
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AGENT_CPU = os.getenv('AGENT_CPU', '200m')
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PROXY_KIND = os.getenv('PROXY_KIND', 'istio')
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INIT_CONTAINER_IMAGE = os.getenv('INIT_CONTAINER_IMAGE', 'ghcr.io/openappsec/openappsec-envoy-filters')
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INIT_CONTAINER_TAG = os.getenv('INIT_CONTAINER_TAG', 'latest')
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ISTIOD_PORT = os.getenv('ISTIOD_PORT', '15014')
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@ -23,6 +24,10 @@ FULL_INIT_CONTAINER_IMAGE = f"{INIT_CONTAINER_IMAGE}:{INIT_CONTAINER_TAG}"
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config.load_incluster_config()
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def is_istio_agent():
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"""Check if the current agent kind is Istio"""
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return PROXY_KIND.lower() == "istio"
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def configure_logging():
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# Read the DEBUG_LEVEL from environment variables, defaulting to WARNING
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DEBUG_LEVEL = os.getenv('DEBUG_LEVEL', 'WARNING').upper()
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@ -45,7 +50,6 @@ def configure_logging():
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formatter = logging.Formatter('%(asctime)s - %(levelname)s - %(message)s')
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handler.setFormatter(formatter)
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# Remove any existing handlers
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if app.logger.hasHandlers():
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app.logger.handlers.clear()
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@ -58,16 +62,21 @@ def get_sidecar_container():
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token = os.getenv("TOKEN")
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custom_fog_enabled = os.getenv("CUSTOM_FOG_ENABLED") == "true" # Check if it's set to "true"
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fog_address = os.getenv("FOG_ADDRESS")
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registered_server = os.getenv("REGISTERED_SERVER")
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appsec_proxy = os.getenv("APPSEC_PROXY")
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config_map_ref = os.getenv("CONFIG_MAP_REF")
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secret_ref = os.getenv("SECRET_REF")
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persistence_enabled = os.getenv("APPSEC_PERSISTENCE_ENABLED", "false").lower() == "true"
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# Prepare the volumeMounts list
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volume_mounts = [
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{"name": "envoy-attachment-shared", "mountPath": "/envoy/attachment/shared/"},
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{"name": "advanced-model", "mountPath": "/advanced-model"}
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]
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if is_istio_agent():
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volume_mounts = [
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{"name": "envoy-attachment-shared", "mountPath": "/envoy/attachment/shared/"},
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{"name": "advanced-model", "mountPath": "/advanced-model"}
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]
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else:
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volume_mounts = [
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{"name": "advanced-model", "mountPath": "/advanced-model"}
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]
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if persistence_enabled:
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volume_mounts.extend([
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@ -99,14 +108,12 @@ def get_sidecar_container():
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"CRDS_SCOPE": os.getenv("CRDS_SCOPE"),
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}
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# Base environment variables
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env = [
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{"name": "registered_server", "value": "ISTIO Server"}
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{"name": "registered_server", "value": registered_server}
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]
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# Add optional environment variables if they are set
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for var_name, var_value in optional_env_vars.items():
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if var_value is not None: # Only add if the variable is set
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if var_value is not None:
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env.append({"name": var_name, "value": var_value})
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sidecar = {
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@ -149,7 +156,7 @@ def get_istio_version():
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url = f"http://istiod.istio-system:{ISTIOD_PORT}/version"
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response = requests.get(url)
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if response.status_code == 200:
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return response.text.strip().split('-')[0] # Extracting version
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return response.text.strip().split('-')[0]
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else:
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raise Exception(f"Failed to get Istio version: {response.status_code}")
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@ -209,7 +216,6 @@ def get_init_container():
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app.logger.debug("Exiting get_init_container()")
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return init_container
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# The volume mount configuration for both the original and sidecar containers
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def get_volume_mount():
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app.logger.debug("Entering get_volume_mount()")
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volume_mount = {
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@ -220,25 +226,35 @@ def get_volume_mount():
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app.logger.debug("Exiting get_volume_mount()")
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return volume_mount
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# Volume definition for the pod
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def get_volume_definition():
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app.logger.debug("Entering get_volume_definition()")
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persistence_enabled = os.getenv("APPSEC_PERSISTENCE_ENABLED", "false").lower() == "true"
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volume_def = [
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{
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"name": "envoy-attachment-shared",
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"emptyDir": {}
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},
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{
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"name": "advanced-model",
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"configMap": {
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"name": "advanced-model-config",
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"optional": True
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if is_istio_agent():
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volume_def = [
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{
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"name": "envoy-attachment-shared",
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"emptyDir": {}
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},
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{
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"name": "advanced-model",
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"configMap": {
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"name": "advanced-model-config",
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"optional": True
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}
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}
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}
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]
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]
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else:
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volume_def = [
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{
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"name": "advanced-model",
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"configMap": {
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"name": "advanced-model-config",
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"optional": True
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}
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}
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]
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if persistence_enabled:
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volume_def.extend([
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@ -385,7 +401,6 @@ def remove_env_variable(containers, container_name, env_var_name, patches):
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def create_or_update_envoy_filter(name, namespace, selector_label_name, selector_label_value):
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api = client.CustomObjectsApi()
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# Define the EnvoyFilter specification
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envoy_filter_spec = {
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"apiVersion": "networking.istio.io/v1alpha3",
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"kind": "EnvoyFilter",
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@ -439,7 +454,6 @@ def create_or_update_envoy_filter(name, namespace, selector_label_name, selector
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}
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}
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# Check if the EnvoyFilter exists
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try:
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existing_envoy_filter = api.get_namespaced_custom_object(
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group="networking.istio.io",
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@ -559,8 +573,10 @@ def mutate():
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app.logger.debug("Current containers in the pod: %s", json.dumps(containers, indent=2))
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sidecar_exists = any(container['name'] == 'open-appsec-nano-agent' for container in containers)
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init_container_exist = any(init_container['name'] == 'prepare-attachment' for init_container in init_containers)
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volume_exist = any(volume['name'] == 'envoy-attachment-shared' for volume in volumes)
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# Only check for envoy-attachment-shared volume if agent kind is Istio
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volume_exist = any(volume['name'] == 'envoy-attachment-shared' for volume in volumes) if is_istio_agent() else False
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app.logger.debug("Does sidecar 'open-appsec-nano-agent' exist? %s", sidecar_exists)
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app.logger.debug("Agent kind: %s", PROXY_KIND)
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# Determine if we should remove the injected data
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REMOVE_WAF = os.getenv('REMOVE_INJECTED_DATA', 'false').lower() == 'true'
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@ -574,53 +590,65 @@ def mutate():
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CONFIG_PORT_VALUE = os.getenv('CONFIG_PORT')
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CONCURRENCY_NUMBER_VALUE = os.getenv('CONCURRENCY_NUMBER')
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if REMOVE_WAF:
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if DEPLOY_FILTER and SELECTOR_LABEL_NAME and SELECTOR_LABEL_VALUE:
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remove_envoy_filter_by_selector(namespace, SELECTOR_LABEL_NAME, SELECTOR_LABEL_VALUE)
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app.logger.debug("Removing injected sidecar and associated resources.")
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# Remove ld library path env variable
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if ISTIO_CONTAINER_NAME:
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if CONCURRENCY_NUMBER_VALUE:
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remove_env_variable(containers, ISTIO_CONTAINER_NAME, 'CONCURRENCY_NUMBER', patches)
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if CONFIG_PORT_VALUE:
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remove_env_variable(containers, ISTIO_CONTAINER_NAME, 'CONFIG_PORT', patches)
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if CONCURRENCY_CALC_VALUE:
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remove_env_variable(containers, ISTIO_CONTAINER_NAME, 'CONCURRENCY_CALC', patches)
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if LIBRARY_PATH_VALUE:
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remove_env_variable(containers, ISTIO_CONTAINER_NAME, 'LD_LIBRARY_PATH', patches)
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if is_istio_agent():
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app.logger.debug("PROXY_KIND is istio, removing Istio-specific components.")
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if 'shareProcessNamespace' in obj.get('spec', {}):
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patches.append({
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"op": "remove",
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"path": "/spec/shareProcessNamespace"
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})
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app.logger.debug("Removed shareProcessNamespace patch")
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if DEPLOY_FILTER and SELECTOR_LABEL_NAME and SELECTOR_LABEL_VALUE:
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remove_envoy_filter_by_selector(namespace, SELECTOR_LABEL_NAME, SELECTOR_LABEL_VALUE)
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if ISTIO_CONTAINER_NAME:
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if CONCURRENCY_NUMBER_VALUE:
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remove_env_variable(containers, ISTIO_CONTAINER_NAME, 'CONCURRENCY_NUMBER', patches)
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if CONFIG_PORT_VALUE:
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remove_env_variable(containers, ISTIO_CONTAINER_NAME, 'CONFIG_PORT', patches)
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if CONCURRENCY_CALC_VALUE:
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remove_env_variable(containers, ISTIO_CONTAINER_NAME, 'CONCURRENCY_CALC', patches)
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if LIBRARY_PATH_VALUE:
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remove_env_variable(containers, ISTIO_CONTAINER_NAME, 'LD_LIBRARY_PATH', patches)
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if 'shareProcessNamespace' in obj.get('spec', {}):
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patches.append({
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"op": "remove",
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"path": "/spec/shareProcessNamespace"
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})
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app.logger.debug("Removed shareProcessNamespace patch")
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else:
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app.logger.debug("shareProcessNamespace not found; no patch to remove it")
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if init_container_exist:
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for idx, init_container in enumerate(init_containers):
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if init_container['name'] == 'prepare-attachment':
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patches.append({
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"op": "remove",
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"path": f"/spec/initContainers/{idx}"
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})
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app.logger.debug(f"Removed init container patch: {patches[-1]}")
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break
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else:
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app.logger.debug("shareProcessNamespace not found; no patch to remove it")
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app.logger.debug(f"PROXY_KIND is {PROXY_KIND}, skipping Istio-specific removal.")
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# Remove the init container if it exists
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if init_container_exist:
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for idx, init_container in enumerate(init_containers):
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if init_container['name'] == 'prepare-attachment':
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patches.append({
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"op": "remove",
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"path": f"/spec/initContainers/{idx}"
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})
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app.logger.debug(f"Removed init container patch: {patches[-1]}")
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break # Stop once we find and remove the target container
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# For kong agents, set automountServiceAccountToken back to false
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if 'automountServiceAccountToken' in obj.get('spec', {}):
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patches.append({
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"op": "replace",
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"path": "/spec/automountServiceAccountToken",
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"value": False
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})
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app.logger.debug("Set automountServiceAccountToken=false for kong agent removal")
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# Remove the sidecar container if it exists
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if sidecar_exists:
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for idx, container in enumerate(containers):
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volume_mounts = container.get('volumeMounts', [])
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for idx_v, volume_mount in enumerate(volume_mounts):
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if volume_mount['name'] == 'envoy-attachment-shared':
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patches.append({
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"op": "remove",
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"path": f"/spec/containers/{idx}/volumeMounts/{idx_v}"
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})
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app.logger.debug(f"Removed volumeMount: {patches[-1]}")
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if is_istio_agent():
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for idx_v, volume_mount in enumerate(volume_mounts):
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if volume_mount['name'] == 'envoy-attachment-shared':
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patches.append({
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"op": "remove",
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"path": f"/spec/containers/{idx}/volumeMounts/{idx_v}"
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})
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app.logger.debug(f"Removed volumeMount: {patches[-1]}")
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if container['name'] == 'open-appsec-nano-agent':
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patches.append({
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"op": "remove",
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@ -628,50 +656,44 @@ def mutate():
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})
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app.logger.debug(f"Removed sidecar container patch: {patches[-1]}")
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# Remove the volume if it exists
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if volume_exist:
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for idx, volume in enumerate(volumes):
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if volume['name'] == 'envoy-attachment-shared':
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if is_istio_agent() and volume['name'] == 'envoy-attachment-shared':
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patches.append({
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"op": "remove",
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"path": f"/spec/volumes/{idx}"
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})
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app.logger.debug(f"Removed volume patch: {patches[-1]}")
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break # Stop once we find and remove the target container
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break
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else:
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app.logger.debug("Before if: Sidecar 'open-appsec-nano-agent' does not exist. Preparing to add it.")
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# Define the sidecar container
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sidecar = get_sidecar_container()
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# Define the init container()
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init_container = get_init_container()
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# Define the volume mount for istio-proxy
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volume_mount = get_volume_mount()
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# Define the volume
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volume_def = get_volume_definition()
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if ISTIO_CONTAINER_NAME:
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add_env_if_not_exist(containers, ISTIO_CONTAINER_NAME, patches)
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add_env_variable_value_from(containers, ISTIO_CONTAINER_NAME, 'OPENAPPSEC_UID', None, patches, value_from={"fieldRef": {"fieldPath": "metadata.uid"}})
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if LIBRARY_PATH_VALUE:
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add_env_variable(containers, ISTIO_CONTAINER_NAME, 'LD_LIBRARY_PATH', LIBRARY_PATH_VALUE, patches)
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if CONCURRENCY_CALC_VALUE:
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add_env_variable(containers, ISTIO_CONTAINER_NAME, 'CONCURRENCY_CALC', CONCURRENCY_CALC_VALUE, patches)
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if CONFIG_PORT_VALUE:
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add_env_variable(containers, ISTIO_CONTAINER_NAME, 'CONFIG_PORT', CONFIG_PORT_VALUE, patches)
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if CONCURRENCY_NUMBER_VALUE:
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add_env_variable(containers, ISTIO_CONTAINER_NAME, 'CONCURRENCY_NUMBER', CONCURRENCY_NUMBER_VALUE, patches)
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else:
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app.logger.debug("ISTIO_CONTAINER_NAME skipping environment variable addition")
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if is_istio_agent():
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app.logger.debug("PROXY_KIND is istio, adding Istio-specific components.")
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# Add the sidecar container
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if not sidecar_exists:
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init_container = get_init_container()
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volume_mount = get_volume_mount()
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if ISTIO_CONTAINER_NAME:
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add_env_if_not_exist(containers, ISTIO_CONTAINER_NAME, patches)
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add_env_variable_value_from(containers, ISTIO_CONTAINER_NAME, 'OPENAPPSEC_UID', None, patches, value_from={"fieldRef": {"fieldPath": "metadata.uid"}})
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if LIBRARY_PATH_VALUE:
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add_env_variable(containers, ISTIO_CONTAINER_NAME, 'LD_LIBRARY_PATH', LIBRARY_PATH_VALUE, patches)
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if CONCURRENCY_CALC_VALUE:
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add_env_variable(containers, ISTIO_CONTAINER_NAME, 'CONCURRENCY_CALC', CONCURRENCY_CALC_VALUE, patches)
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if CONFIG_PORT_VALUE:
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add_env_variable(containers, ISTIO_CONTAINER_NAME, 'CONFIG_PORT', CONFIG_PORT_VALUE, patches)
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if CONCURRENCY_NUMBER_VALUE:
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add_env_variable(containers, ISTIO_CONTAINER_NAME, 'CONCURRENCY_NUMBER', CONCURRENCY_NUMBER_VALUE, patches)
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else:
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app.logger.debug("ISTIO_CONTAINER_NAME skipping environment variable addition")
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# Add shareProcessNamespace if not already set
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patches.append({
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"op": "add",
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"path": "/spec/shareProcessNamespace",
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@ -679,14 +701,6 @@ def mutate():
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})
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app.logger.debug("Added shareProcessNamespace patch")
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patches.append({
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"op": "add",
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"path": "/spec/containers/-",
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"value": sidecar
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})
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app.logger.debug("Added sidecar container patch: %s", patches[-1])
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# Add the volume mount to istio-proxy container (assumes istio-proxy is first container)
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patches.append({
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"op": "add",
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"path": "/spec/containers/0/volumeMounts/-",
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@ -694,7 +708,49 @@ def mutate():
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})
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app.logger.debug("Added volume mount patch to istio-proxy: %s", patches[-1])
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# Add the new volume definition
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if not init_container_exist:
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if 'initContainers' in obj['spec']:
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obj['spec']['initContainers'].append(init_container)
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else:
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obj['spec']['initContainers'] = [init_container]
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patches.append({
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"op": "add",
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"path": "/spec/initContainers",
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"value": obj['spec']['initContainers']
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})
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if DEPLOY_FILTER and SELECTOR_LABEL_NAME and SELECTOR_LABEL_VALUE:
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RELEASE_NAME = os.getenv('RELEASE_NAME', 'openappsec-waf-injected')
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envoy_filter_name = RELEASE_NAME + "-waf-filter"
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create_or_update_envoy_filter(envoy_filter_name, namespace, SELECTOR_LABEL_NAME, SELECTOR_LABEL_VALUE)
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else:
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app.logger.debug(f"PROXY_KIND is {PROXY_KIND}, skipping Istio-specific components.")
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current_spec = obj.get('spec', {})
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if 'automountServiceAccountToken' in current_spec:
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patches.append({
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"op": "replace",
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"path": "/spec/automountServiceAccountToken",
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"value": True
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})
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app.logger.debug("Replaced existing automountServiceAccountToken=true for kong agent")
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else:
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patches.append({
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"op": "add",
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"path": "/spec/automountServiceAccountToken",
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"value": True
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})
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app.logger.debug("Added automountServiceAccountToken=true for kong agent")
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if not sidecar_exists:
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patches.append({
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"op": "add",
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"path": "/spec/containers/-",
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"value": sidecar
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})
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app.logger.debug("Added sidecar container patch: %s", patches[-1])
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for volume in volume_def:
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patches.append({
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||||
"op": "add",
|
||||
@ -702,15 +758,9 @@ def mutate():
|
||||
"value": volume
|
||||
})
|
||||
app.logger.debug("Added volume definition patch: %s", patches[-1])
|
||||
|
||||
if DEPLOY_FILTER and SELECTOR_LABEL_NAME and SELECTOR_LABEL_VALUE:
|
||||
RELEASE_NAME = os.getenv('RELEASE_NAME', 'openappsec-waf-injected')
|
||||
envoy_filter_name = RELEASE_NAME + "-waf-filter"
|
||||
create_or_update_envoy_filter(envoy_filter_name, namespace, SELECTOR_LABEL_NAME, SELECTOR_LABEL_VALUE)
|
||||
else:
|
||||
app.logger.debug("Before else: Sidecar 'open-appsec-nano-agent' already exists. Checking for image updates.")
|
||||
|
||||
# Optionally, update the sidecar image and tag if necessary
|
||||
for idx, container in enumerate(containers):
|
||||
if container['name'] == 'open-appsec-nano-agent':
|
||||
current_image = container.get('image', '')
|
||||
@ -723,37 +773,24 @@ def mutate():
|
||||
"value": FULL_AGENT_IMAGE
|
||||
})
|
||||
app.logger.debug(f"Updated sidecar image patch: {patches[-1]}")
|
||||
break # Sidecar found and handled
|
||||
break
|
||||
|
||||
if not init_container_exist:
|
||||
# Add the initContainer to the pod spec in the deployment
|
||||
if 'initContainers' in obj['spec']:
|
||||
obj['spec']['initContainers'].append(init_container)
|
||||
else:
|
||||
obj['spec']['initContainers'] = [init_container]
|
||||
|
||||
patches.append({
|
||||
"op": "add",
|
||||
"path": "/spec/initContainers",
|
||||
"value": obj['spec']['initContainers']
|
||||
})
|
||||
else:
|
||||
if is_istio_agent() and init_container_exist:
|
||||
app.logger.debug("Before else: init-container 'prepare-attachment' already exists. Checking for image updates.")
|
||||
|
||||
# Optionally, update the sidecar image and tag if necessary
|
||||
for idx, container in enumerate(containers):
|
||||
for idx, container in enumerate(init_containers):
|
||||
if container['name'] == 'prepare-attachment':
|
||||
current_image = container.get('image', '')
|
||||
app.logger.debug("Current init container image: %s", current_image)
|
||||
app.logger.debug("Desired init container image: %s", FULL_AGENT_IMAGE)
|
||||
if current_image != FULL_AGENT_IMAGE:
|
||||
app.logger.debug("Desired init container image: %s", FULL_INIT_CONTAINER_IMAGE)
|
||||
if current_image != FULL_INIT_CONTAINER_IMAGE:
|
||||
patches.append({
|
||||
"op": "replace",
|
||||
"path": f"/spec/containers/{idx}/image",
|
||||
"value": FULL_AGENT_IMAGE
|
||||
"path": f"/spec/initContainers/{idx}/image",
|
||||
"value": FULL_INIT_CONTAINER_IMAGE
|
||||
})
|
||||
app.logger.debug(f"Updated sidecar image patch: {patches[-1]}")
|
||||
break # Sidecar found and handled
|
||||
app.logger.debug(f"Updated init container image patch: {patches[-1]}")
|
||||
break
|
||||
|
||||
|
||||
app.logger.info("Total patches: %s", json.dumps(patches, indent=2))
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user