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addnode.py
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#!/usr/bin/env python2.7
"""Kubernetes cluster generator - addnode."""
import argparse
import os
import subprocess
import base64
from jinja2 import Environment, FileSystemLoader
__author__ = "Patrick Blaas <[email protected]>"
__license__ = "GPL v3"
__version__ = "0.0.10"
__status__ = "Active"
PATH = os.path.dirname(os.path.abspath(__file__))
TEMPLATE_ENVIRONMENT = Environment(
autoescape=False,
loader=FileSystemLoader(os.path.join(PATH, '.')),
trim_blocks=True)
# Testing if environment variables are available.
if "OS_USERNAME" not in os.environ:
os.environ["OS_USERNAME"] = "Default"
if "OS_PASSWORD" not in os.environ:
os.environ["OS_PASSWORD"] = "Default"
if "OS_TENANT_NAME" not in os.environ:
os.environ["OS_TENANT_NAME"] = "Default"
if "OS_TENANT_ID" not in os.environ:
os.environ["OS_TENANT_ID"] = "Default"
if "OS_REGION_NAME" not in os.environ:
os.environ["OS_REGION_NAME"] = "Default"
if "OS_AUTH_URL" not in os.environ:
os.environ["OS_AUTH_URL"] = "Default"
parser = argparse.ArgumentParser()
parser.add_argument("ipaddress", help="node ip address")
parser.add_argument("--workerimageflavor", help="Worker image flavor ID")
parser.add_argument("--glanceimagename", help="Glance image name ID - (Container Linux CoreOS (third-party))", default="Container Linux CoreOS (third-party)")
parser.add_argument("--username", help="Openstack username - (OS_USERNAME environment variable)", default=os.environ["OS_USERNAME"])
parser.add_argument("--projectname", help="Openstack project Name - (OS_TENANT_NAME environment variable)", default=os.environ["OS_TENANT_NAME"])
parser.add_argument("--k8sver", help="Hyperkube version")
args = parser.parse_args()
cloudconf_template = TEMPLATE_ENVIRONMENT.get_template('./templates/k8scloudconf.yaml.tmpl')
opensslmanager_template = TEMPLATE_ENVIRONMENT.get_template('./tls/openssl.cnf.tmpl')
additional_node_template = TEMPLATE_ENVIRONMENT.get_template('./templates/additional_node.tf.tmpl')
opensslworker_template = TEMPLATE_ENVIRONMENT.get_template('./tls/openssl-worker.cnf.tmpl')
try:
# Create node certificates
def createNodeCert(nodeip, k8srole):
"""Create Node certificates."""
print("received: " + nodeip)
if k8srole == "manager":
openssltemplate = (opensslmanager_template.render(
floatingip1=args.floatingip1,
ipaddress=nodeip,
loadbalancer=(args.subnetcidr).rsplit('.', 1)[0] + ".3"
))
else:
openssltemplate = (opensslworker_template.render(
ipaddress=nodeip,
))
with open('./tls/openssl.cnf', 'w') as openssl:
openssl.write(openssltemplate)
nodeoctet = nodeip.rsplit('.')[3]
subprocess.call(["openssl", "genrsa", "-out", nodeip + "-k8s-node-key.pem", "2048"], cwd='./tls')
subprocess.call(["openssl", "req", "-new", "-key", nodeip + "-k8s-node-key.pem", "-out", nodeip + "-k8s-node.csr", "-subj", "/CN=system:node:k8s-" + str(clustername) + "-node" + str(nodeoctet) + "/O=system:nodes", "-config", "openssl.cnf"], cwd='./tls')
subprocess.call(["openssl", "x509", "-req", "-in", nodeip + "-k8s-node.csr", "-CA", "ca.pem", "-CAkey", "ca-key.pem", "-CAcreateserial", "-out", nodeip + "-k8s-node.pem", "-days", "730", "-extensions", "v3_req", "-extfile", "openssl.cnf"], cwd='./tls')
# ${i}-etcd-worker.pem
subprocess.call(["openssl", "genrsa", "-out", nodeip + "-etcd-node-key.pem", "2048"], cwd='./tls')
subprocess.call(["openssl", "req", "-new", "-key", nodeip + "-etcd-node-key.pem", "-out", nodeip + "-etcd-node.csr", "-subj", "/CN=" + nodeip + "-etcd-node", "-config", "openssl.cnf"], cwd='./tls')
subprocess.call(["openssl", "x509", "-req", "-in", nodeip + "-etcd-node.csr", "-CA", "etcd-ca.pem", "-CAkey", "etcd-ca-key.pem", "-CAcreateserial", "-out", nodeip + "-etcd-node.pem", "-days", "730", "-extensions", "v3_req", "-extfile", "openssl.cnf"], cwd='./tls')
def configTranspiler(nodeip):
"""Create json file from yaml content."""
subprocess.call(["./ct", "-files-dir=tls", "-in-file", "node_" + nodeip + ".yaml", "-out-file", "node_" + nodeip + ".json", "-pretty"])
base64buffer = open('./tls/etcd-ca.pem', 'rU').read()
ETCDCAPEM = base64.b64encode(base64buffer)
if args.ipaddress != "":
lanip = str(args.ipaddress)
nodeyaml = str("node_" + lanip.rstrip(' ') + ".yaml")
with open('cluster.status', 'r') as clusterstat:
fh = clusterstat.readlines()
print lanip
etcdendpointsurls = str(fh[0].split("\t")[1])[:-1]
if args.k8sver is None:
k8sver = str(fh[1].split("\t")[1])[:-1]
else:
k8sver = args.k8sver
clustername = fh[2].split("\t")[1][:-1]
subnetcidr = str(fh[3].split("\t")[1])[:-1]
managers = str(fh[5].split("\t")[1])[:-1]
workers = str(fh[6].split("\t")[1])[:-1]
managerimageflavor = str(fh[7].split("\t")[1])[:-1]
if args.workerimageflavor is None:
workerimageflavor = str(fh[8].split("\t")[1])[:-1]
else:
workerimageflavor = args.workerimageflavor
floatingip1 = str(fh[9].split("\t")[1])[:-1]
floatingip2 = str(fh[10].split("\t")[1])[:-1]
dnsserver = str(fh[11].split("\t")[1])[:-1]
netoverlay = str(fh[12].split("\t")[1])[:-1]
authmode = str(fh[13].split("\t")[1])[:-1]
cloudprovider = str(fh[14].split("\t")[1])[:-1]
podcidr = str(fh[15].split("\t")[1])[:-1]
flannelver = str(fh[16].split("\t")[1])[:-1]
keypair = str(fh[19].split("\t")[1])[:-1]
etcdver = str(fh[17].split("\t")[1])[:-1]
cryptedPass = str(fh[20].split("\t")[1])[:-1]
sshkey = str(fh[18].split("\t")[2])[:-1]
availabilityzone = str(fh[21].split("\t")[2])[:-1]
apidebuglevel = str(fh[23].split("\t")[1])[:-1]
defaultsecuritygroupid = str(fh[24].split("\t")[1])[:-1]
proxymode = str(fh[25].split("\t")[1])[:-1]
createNodeCert(lanip, "worker")
worker_template = (cloudconf_template.render(
node=lanip.rsplit('.', 1)[1],
isworker=1,
workers=workers,
dnsserver=dnsserver,
etcdendpointsurls=etcdendpointsurls,
floatingip1=floatingip1,
k8sver=k8sver,
flannelver=flannelver,
etcdver=etcdver,
netoverlay=netoverlay,
cloudprovider=cloudprovider,
authmode=authmode,
clustername=clustername,
subnetcidr=subnetcidr,
cidr=podcidr,
ipaddress=lanip,
ipaddressgw=subnetcidr.rsplit('.', 1)[0] + ".1",
loadbalancer=subnetcidr.rsplit('.', 1)[0] + ".3",
cryptedPass=cryptedPass,
sshkey=sshkey,
apidebuglevel=apidebuglevel,
proxymode=proxymode
))
with open(nodeyaml, 'w') as worker:
worker.write(worker_template)
additional_node = (additional_node_template.render(
clustername=clustername,
ipaddress=lanip,
workerimageflavor=workerimageflavor,
glanceimagename=args.glanceimagename,
keypair=keypair,
subnetcidr=subnetcidr,
octet=lanip.rsplit('.', 1)[1],
availabilityzone=availabilityzone,
defaultsecuritygroupid=defaultsecuritygroupid
))
with open("k8s.tf", 'a') as k8stf:
k8stf.write(additional_node)
configTranspiler(args.ipaddress)
except Exception as e:
raise
else:
print("Done")