def _get_host(self, container_inspect):
"""Extract the host IP from a docker inspect object, or the kubelet API."""
ip_addr = container_inspect.get('NetworkSettings', {}).get('IPAddress')
if not ip_addr:
if not is_k8s():
return
# kubernetes case
log.debug(
"Didn't find the IP address for container %s (%s), using the kubernetes way."
% (container_inspect.get('Id', '')[:12],
container_inspect.get('Config', {}).get('Image', '')))
pod_list = self.kubeutil.retrieve_pods_list().get('items', [])
c_id = container_inspect.get('Id')
for pod in pod_list:
pod_ip = pod.get('status', {}).get('podIP')
if pod_ip is None:
continue
else:
c_statuses = pod.get('status',
{}).get('containerStatuses', [])
for status in c_statuses:
# compare the container id with those of containers in the current pod
if c_id == status.get('containerID',
'').split('//')[-1]:
ip_addr = pod_ip
return ip_addr
def _get_port(self, container_inspect, tpl_var):
"""Extract a port from a container_inspect or the k8s API given a template variable."""
c_id = container_inspect.get('Id', '')
try:
ports = map(lambda x: x.split('/')[0], container_inspect['NetworkSettings']['Ports'].keys())
except (IndexError, KeyError, AttributeError):
# try to get ports from the docker API. Works if the image has an EXPOSE instruction
ports = map(lambda x: x.split('/')[0], container_inspect['Config'].get('ExposedPorts', {}).keys())
# if it failed, try with the kubernetes API
if not ports and is_k8s():
log.debug("Didn't find the port for container %s (%s), trying the kubernetes way." %
(c_id[:12], container_inspect.get('Config', {}).get('Image', '')))
co_statuses = self._get_kube_config(c_id, 'status').get('containerStatuses', [])
c_name = None
for co in co_statuses:
if co.get('containerID', '').split('//')[-1] == c_id:
c_name = co.get('name')
break
containers = self._get_kube_config(c_id, 'spec').get('containers', [])
for co in containers:
if co.get('name') == c_name:
ports = map(lambda x: str(x.get('containerPort')), co.get('ports', []))
ports = sorted(ports, key=lambda x: int(x))
return self._extract_port_from_list(ports, tpl_var)
def get_tags(self, c_inspect):
"""Extract useful tags from docker or platform APIs. These are collected by default."""
tags = []
if is_k8s():
pod_metadata = self._get_kube_config(c_inspect.get('Id'),
'metadata')
if pod_metadata is None:
log.warning("Failed to fetch pod metadata for container %s."
" Kubernetes tags may be missing." %
c_inspect.get('Id', '')[:12])
return []
# get labels
kube_labels = pod_metadata.get('labels', {})
for label, value in kube_labels.iteritems():
tags.append('%s:%s' % (label, value))
# get replication controller
created_by = json.loads(
pod_metadata.get('annotations',
{}).get('kubernetes.io/created-by', '{}'))
if created_by.get('reference',
{}).get('kind') == 'ReplicationController':
tags.append('kube_replication_controller:%s' %
created_by.get('reference', {}).get('name'))
# get kubernetes namespace
tags.append('kube_namespace:%s' % pod_metadata.get('namespace'))
return tags
def _get_additional_tags(self, container_inspect):
tags = []
if is_k8s():
pod_metadata = self._get_kube_config(container_inspect.get('Id'), 'metadata')
pod_spec = self._get_kube_config(container_inspect.get('Id'), 'spec')
tags.append('node_name:%s' % pod_spec.get('nodeName'))
tags.append('pod_name:%s' % pod_metadata.get('name'))
return tags
def _get_additional_tags(self, container_inspect):
tags = []
if is_k8s():
pod_metadata = self._get_kube_config(container_inspect.get('Id'),
'metadata')
pod_spec = self._get_kube_config(container_inspect.get('Id'),
'spec')
tags.append('node_name:%s' % pod_spec.get('nodeName'))
tags.append('pod_name:%s' % pod_metadata.get('name'))
return tags
def _get_additional_tags(self, container_inspect, *args):
tags = []
if is_k8s():
pod_metadata = self._get_kube_config(container_inspect.get('Id'), 'metadata')
pod_spec = self._get_kube_config(container_inspect.get('Id'), 'spec')
if pod_metadata is None or pod_spec is None:
log.warning("Failed to fetch pod metadata or pod spec for container %s."
" Additional Kubernetes tags may be missing." % container_inspect.get('Id', '')[:12])
return []
tags.append('node_name:%s' % pod_spec.get('nodeName'))
tags.append('pod_name:%s' % pod_metadata.get('name'))
return tags
def _get_host_address(self, c_inspect, tpl_var):
"""Extract the container IP from a docker inspect object, or the kubelet API."""
c_id, c_img = c_inspect.get('Id',
''), c_inspect.get('Config',
{}).get('Image', '')
tpl_parts = tpl_var.split('_')
# a specifier was given
if len(tpl_parts) > 1:
networks = c_inspect.get('NetworkSettings',
{}).get('Networks') or {}
ip_dict = {}
for net_name, net_desc in networks.iteritems():
ip = net_desc.get('IPAddress')
if ip:
ip_dict[net_name] = ip
ip_addr = self._extract_ip_from_networks(ip_dict, tpl_var)
if ip_addr:
return ip_addr
# try to get the bridge IP address
log.debug(
"No network found for container %s (%s), trying with IPAddress field"
% (c_id[:12], c_img))
ip_addr = c_inspect.get('NetworkSettings', {}).get('IPAddress')
if ip_addr:
return ip_addr
if is_k8s():
# kubernetes case
log.debug("Couldn't find the IP address for container %s (%s), "
"using the kubernetes way." % (c_id[:12], c_img))
pod_list = self.kubeutil.retrieve_pods_list().get('items', [])
for pod in pod_list:
pod_ip = pod.get('status', {}).get('podIP')
if pod_ip is None:
continue
else:
c_statuses = pod.get('status',
{}).get('containerStatuses', [])
for status in c_statuses:
# compare the container id with those of containers in the current pod
if c_id == status.get('containerID',
'').split('//')[-1]:
return pod_ip
log.error("No IP address was found for container %s (%s)" %
(c_id[:12], c_img))
return None
def __init__(self, agentConfig):
self.docker_client = DockerUtil().client
if is_k8s():
self.kubeutil = KubeUtil()
try:
self.config_store = get_config_store(agentConfig=agentConfig)
except Exception as e:
log.error('Failed to instantiate the config store client. '
'Auto-config only will be used. %s' % str(e))
agentConfig['sd_config_backend'] = None
self.config_store = get_config_store(agentConfig=agentConfig)
self.VAR_MAPPING = {
'host': self._get_host,
'port': self._get_ports,
'tags': self._get_additional_tags,
}
AbstractSDBackend.__init__(self, agentConfig)
def __init__(self, agentConfig):
self.docker_client = DockerUtil().client
if is_k8s():
self.kubeutil = KubeUtil()
try:
self.config_store = get_config_store(agentConfig=agentConfig)
except Exception as e:
log.error('Failed to instantiate the config store client. '
'Auto-config only will be used. %s' % str(e))
agentConfig['sd_config_backend'] = None
self.config_store = get_config_store(agentConfig=agentConfig)
self.VAR_MAPPING = {
'host': self._get_host,
'port': self._get_ports,
'tags': self._get_additional_tags,
}
AbstractSDBackend.__init__(self, agentConfig)
def _get_host_address(self, c_inspect, tpl_var):
"""Extract the container IP from a docker inspect object, or the kubelet API."""
c_id, c_img = c_inspect.get('Id', ''), c_inspect.get('Config', {}).get('Image', '')
tpl_parts = tpl_var.split('_')
# a specifier was given
if len(tpl_parts) > 1:
networks = c_inspect.get('NetworkSettings', {}).get('Networks') or {}
ip_dict = {}
for net_name, net_desc in networks.iteritems():
ip = net_desc.get('IPAddress')
if ip:
ip_dict[net_name] = ip
ip_addr = self._extract_ip_from_networks(ip_dict, tpl_var)
if ip_addr:
return ip_addr
# try to get the bridge IP address
log.debug("No network found for container %s (%s), trying with IPAddress field" % (c_id[:12], c_img))
ip_addr = c_inspect.get('NetworkSettings', {}).get('IPAddress')
if ip_addr:
return ip_addr
if is_k8s():
# kubernetes case
log.debug("Couldn't find the IP address for container %s (%s), "
"using the kubernetes way." % (c_id[:12], c_img))
pod_list = self.kubeutil.retrieve_pods_list().get('items', [])
for pod in pod_list:
pod_ip = pod.get('status', {}).get('podIP')
if pod_ip is None:
continue
else:
c_statuses = pod.get('status', {}).get('containerStatuses', [])
for status in c_statuses:
# compare the container id with those of containers in the current pod
if c_id == status.get('containerID', '').split('//')[-1]:
return pod_ip
log.error("No IP address was found for container %s (%s)" % (c_id[:12], c_img))
return None
def _get_host(self, container_inspect):
"""Extract the host IP from a docker inspect object, or the kubelet API."""
ip_addr = container_inspect.get('NetworkSettings', {}).get('IPAddress')
if not ip_addr:
if not is_k8s():
return
# kubernetes case
log.debug("Didn't find the IP address for container %s (%s), using the kubernetes way." %
(container_inspect.get('Id', '')[:12], container_inspect.get('Config', {}).get('Image', '')))
pod_list = self.kubeutil.retrieve_pods_list().get('items', [])
c_id = container_inspect.get('Id')
for pod in pod_list:
pod_ip = pod.get('status', {}).get('podIP')
if pod_ip is None:
continue
else:
c_statuses = pod.get('status', {}).get('containerStatuses', [])
for status in c_statuses:
# compare the container id with those of containers in the current pod
if c_id == status.get('containerID', '').split('//')[-1]:
ip_addr = pod_ip
return ip_addr
def get_tags(self, c_inspect):
"""Extract useful tags from docker or platform APIs. These are collected by default."""
tags = []
if is_k8s():
pod_metadata = self._get_kube_config(c_inspect.get('Id'), 'metadata')
if pod_metadata is None:
log.warning("Failed to fetch pod metadata for container %s."
" Kubernetes tags may be missing." % c_inspect.get('Id', '')[:12])
return []
# get labels
kube_labels = pod_metadata.get('labels', {})
for label, value in kube_labels.iteritems():
tags.append('%s:%s' % (label, value))
# get replication controller
created_by = json.loads(pod_metadata.get('annotations', {}).get('kubernetes.io/created-by', '{}'))
if created_by.get('reference', {}).get('kind') == 'ReplicationController':
tags.append('kube_replication_controller:%s' % created_by.get('reference', {}).get('name'))
# get kubernetes namespace
tags.append('kube_namespace:%s' % pod_metadata.get('namespace'))
return tags
def test_is_k8s(self):
os.unsetenv("KUBERNETES_PORT")
self.assertFalse(is_k8s())
os.environ["KUBERNETES_PORT"] = "999"
self.assertTrue(is_k8s())
def test_is_k8s(self):
os.unsetenv('KUBERNETES_PORT')
self.assertFalse(is_k8s())
os.environ['KUBERNETES_PORT'] = '999'
self.assertTrue(is_k8s())
