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Added api to execute commands on node

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This commit is contained in:
kansi 2018-01-11 20:43:41 +05:30
parent c86f7ddb0e
commit 293587701d
1 changed files with 34 additions and 18 deletions
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34
network_driver/node.py
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@ -1,14 +1,13 @@
import os
import json
import time
import uuid
import kubernetes.client
import kubernetes
# import kubernetes.client
from kubernetes.client.rest import ApiException
from kubernetes.stream import stream
MINIKUBE_URI = 'https://127.0.0.1:8443'
MINIKUBE_HOME = os.environ.get('MINIKUBE_HOME', os.environ['HOME'])
# TODO: create a default pod spec of BDB
BDB_POD_SPEC = {}
@ -16,11 +15,11 @@ BDB_POD_SPEC = {}
class Node():
def __init__(self, namespace='itest-setup', name=None, spec=BDB_POD_SPEC):
kubernetes.config.load_kube_config()
config = kubernetes.client.Configuration()
config.host = MINIKUBE_URI
config.key_file = os.path.join(MINIKUBE_HOME, '.minikube/client.key')
config.cert_file = os.path.join(MINIKUBE_HOME, '.minikube/client.crt')
config.verify_ssl = False
config.assert_hostname = False
kubernetes.client.Configuration.set_default(config)
self.api_instance = kubernetes.client.CoreV1Api(kubernetes.client.ApiClient(config))
self.namespace = namespace
self.name = name or uuid.uuid4().hex
@ -29,7 +28,10 @@ class Node():
pod.version = 'v1'
pod.kind = 'Pod'
pod.metadata = {"name": self.name}
pod.spec = {"containers": [{"name": "myapp-container",
pod.spec = {"containers": [{"name": "tendermint",
"image": "busybox",
"command": ["sh", "-c", "echo Hello Kubernetes! && sleep 3600"]},
{"name": "bigchaindb",
"image": "busybox",
"command": ["sh", "-c", "echo Hello Kubernetes! && sleep 3600"]}]}
self.pod = pod
@ -48,6 +50,7 @@ class Node():
def stop(self, return_after_stopping=True):
""" Stop node."""
if self.is_running:
body = kubernetes.client.V1DeleteOptions()
body.api_version = 'v1'
body.grace_period_seconds = 0
@ -78,6 +81,19 @@ class Node():
else:
return False
def _exec_command(self, container, command):
try:
exec_command = ['/bin/sh', '-c', command]
resp = stream(self.api_instance.connect_get_namespaced_pod_exec,
self.name,
self.namespace,
container=container,
command=exec_command,
stderr=True, stdin=False, stdout=True, tty=False)
return resp
except ApiException as e:
print("Exception when executing command: %s\n" % e)
def _create_namespace(self, namespace):
namespace_spec = kubernetes.client.V1Namespace()
namespace_spec.api_version = 'v1'