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fix: workaround to support multiple kubernetes clusters #171

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fix: workaround to support multiple kubernetes clusters #171

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56 changes: 55 additions & 1 deletion contents/pods-resource-model.py
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Original file line number Diff line number Diff line change
Expand Up @@ -3,9 +3,11 @@
import sys
import os
import common
import hashlib
import json
import shlex
import pprint
import yaml

from kubernetes import client

Expand Down Expand Up @@ -36,6 +38,58 @@ def get(self, path, default=None):
)
log = logging.getLogger('kubernetes-model-source')

def generateConfigFilePath():
config_file = os.environ.get('RD_CONFIG_CONFIG_FILE')
if config_file:
return config_file
url = os.environ.get('RD_CONFIG_URL')
token = os.environ.get('RD_CONFIG_TOKEN')
if not token:
token = os.environ.get('RD_CONFIG_TOKEN_STORAGE_PATH')
if not (url and token):
return None

# WORKAROUND: Create a cached per-node config_file.
config_object = {
'apiVersion': 'v1',
'kind': 'Config',
'current-context': 'context',
'preferences': {},
'clusters': [{
'name': 'cluster',
'cluster': {
'server': url
}
}],
'users': [{
'name': 'user',
'user': {
'token': token
}
}],
'contexts': [{
'name': 'context',
'context': {
'cluster': 'cluster',
'user': 'user'
}
}]
}
verify_ssl = os.environ.get('RD_CONFIG_VERIFY_SSL')
ssl_ca_cert = os.environ.get('RD_CONFIG_SSL_CA_CERT')
if verify_ssl != 'true':
config_object['clusters'][0]['cluster']['insecure-skip-tls-verify'] = True
if ssl_ca_cert:
config_object['clusters'][0]['cluster']['certificate-authority'] = ssl_ca_cert
filename = hashlib.shake_256(json.dumps(config_object).encode('utf-8')).hexdigest(8)
tmpdir = os.path.join(os.environ.get('RD_PLUGIN_VARDIR'), 'tmp')
os.makedirs(tmpdir, exist_ok=True)
config_file = os.path.join(tmpdir, filename)
if not os.path.isfile(config_file):
with open(config_file, 'w') as outfile:
yaml.dump(config_object, outfile)
log.info("Generated %s", config_file)
return config_file

def nodeCollectData(pod, container, defaults, taglist, mappingList, boEmoticon):
tags = []
Expand Down Expand Up @@ -88,7 +142,7 @@ def nodeCollectData(pod, container, defaults, taglist, mappingList, boEmoticon):
default_settings = {
# kubernetes:config_file attribute are kept to avoid breaking existing k8s jobs depend on this configuration-override hack
# This is just a temporary walkaround solultion and should be replaced by a layered configuration-override mechanism.
'kubernetes:config_file': os.environ.get('RD_CONFIG_CONFIG_FILE'),
'kubernetes:config_file': generateConfigFilePath(),
'default:pod_id': pod.status.pod_ip,
'default:host_id': pod.status.host_ip,
'default:started_at': startedAt,
Expand Down