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# Copyright 2021 Spirent Communications.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""
Run commands inside the pod for post-deployment configuration
"""
import re
import sys
from kubernetes.client.rest import ApiException
from kubernetes.stream import stream
def execute_command(api_instance, pod_info, exec_command):
"""
Execute a command inside a specified pod
exec_command = list of strings
"""
name = pod_info['name']
resp = None
try:
resp = api_instance.read_namespaced_pod(name=name,
namespace='default')
except ApiException as excep:
if excep.status != 404:
print("Unknown error: %s" % excep)
sys.exit(0)
if not resp:
print("Pod %s does not exist. Creating it..." % name)
return -1
# Calling exec and waiting for response
resp = stream(api_instance.connect_get_namespaced_pod_exec,
name,
'default',
command=exec_command,
stderr=True, stdin=False,
stdout=True, tty=False)
print("Response: " + resp)
return resp
def get_virtual_sockets(api_instance, podname, namespace):
"""
Memif or VhostUser Sockets
"""
socket_files = []
pinfo = {'name': podname,
'pod_ip':'',
'namespace': namespace}
cmd = ['cat', '/etc/podnetinfo/annotations']
resp = execute_command(api_instance, pinfo, cmd)
# Remove unnecessary elements
results = re.sub(r"(\\n|\"|\n|\\|\]|\{|\}|\[)", "", resp).strip()
# Remove unnecessary spaces
results = re.sub(r"\s+","", results, flags=re.UNICODE)
# Get the RHS values
output = results.split('=')
for out in output:
if 'socketfile' in out:
out2 = out.split(',')
for rout in out2:
if 'socketfile' in rout:
print(rout[11:])
socket_files.append(rout[11:])
def get_sriov_interfaces(api_instance, podname, namespace):
"""
Get SRIOV PIDs.
"""
pinfo = {'name': podname,
'pod_ip':'',
'namespace': namespace}
cmd = ['cat', '/etc/podnetinfo/annotations']
response = execute_command(api_instance, pinfo, cmd)
# Remove unnecessary elements
results = re.sub(r"(\\n|\"|\n|\\|\]|\{|\}|\[)", "", response).strip()
# Remove unnecessary spaces
results = re.sub(r"\s+","", results, flags=re.UNICODE)
# Get the RHS values
output = results.split('=')
names = []
ifs = []
for out in output:
if 'interface' in out:
out2 = out.split(',')
for rout in out2:
if 'interface' in rout:
ifs.append(rout[10:])
elif 'name' in rout:
names.append(rout[5:])
res = {names[i]: ifs[i] for i in range(len(names))}
return res
def start_fowarding_app(api_instance, podname, namespace, appname):
"""
Start the Forwarding Application
"""
pinfo = {'name': podname,
'pod_ip':'',
'namespace': namespace}
cmd = [appname, '&']
response = execute_command(api_instance, pinfo, cmd)
return response
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