def waitForStack(self, stackn, timeout=10, sleeptime=30):
""" wait for a stack to become "..._COMPLETE"
waits for timeout * sleeptime seconds
returns the stack status
"""
try:
waiting = True
status = None
cn = 0
sleeptime = 30
while waiting:
cn += 1
if cn > timeout:
log.error(
f"Timeout expired waiting for stack {stackn} to become ready"
)
waiting = not waiting
break
status = self.stackStatus(stackn)
if status is not None and "COMPLETE" in status:
log.info(f"Stack {stackn} is {status}")
waiting = not waiting
break
elif status is None:
log.warning(f"stack {stackn} does not exist (anymore)")
waiting = not waiting
break
time.sleep(sleeptime)
return status
except Exception as e:
fname = sys._getframe().f_code.co_name
errorRaise(fname, e)
def stackStatus(self, stackname):
try:
stack = self.stackDetails(stackname)
return stack["StackStatus"] if stack is not None else None
except Exception as e:
fname = sys._getframe().f_code.co_name
errorRaise(fname, e)
def updateStack(self, **kwargs):
try:
resp = self.client.update_stack(**kwargs)
if "StackId" in resp:
return resp["StackId"]
return None
except Exception as e:
fname = sys._getframe().f_code.co_name
errorRaise(fname, e)
def expandDictToList(xdict, keyname="Key", valuename="Value"):
try:
op = []
for key in xdict:
tmp = {keyname: key, valuename: xdict[key]}
op.append(tmp)
return op
except Exception as e:
fname = sys._getframe().f_code.co_name
errorRaise(fname, e)
def buildStackParams(options):
try:
pd = makeParamDict(options["params"])
lpd = expandDictToList(pd,
keyname="ParameterKey",
valuename="ParameterValue")
return lpd
except Exception as e:
fname = sys._getframe().f_code.co_name
errorRaise(fname, e)
def makeParamDict(strparams):
try:
pd = {}
if "=" in strparams:
ea = strparams.split(",")
for p in ea:
tmp = p.split("=")
pd[tmp[0].strip()] = tmp[1].strip()
return pd
except Exception as e:
fname = sys._getframe().f_code.co_name
errorRaise(fname, e)
def stackDetails(self, stackname):
try:
resp = self.client.describe_stacks(StackName=stackname)
if "Stacks" in resp:
stack = resp["Stacks"][0]
return stack
except ClientError as ce:
log.error(f"stack: {stackname} does not exist")
return None
except Exception as e:
fname = sys._getframe().f_code.co_name
errorRaise(fname, e)
def buildStackTags(options):
try:
gtags = {
"owner": "sre",
"environment": "prod",
"product": options["product"],
"role": "stack",
"version": __version__,
}
return expandDictToList(gtags)
except Exception as e:
fname = sys._getframe().f_code.co_name
errorRaise(fname, e)
def buildStackDict(options):
try:
template = getTemplate(options["templatefn"])
if template is None:
raise Exception(f"""Failed to read {options["templatefn"]}""")
xd = {"StackName": options["stackname"], "TemplateBody": template}
xd["Parameters"] = buildStackParams(options)
xd["Capabilities"] = ["CAPABILITY_NAMED_IAM"]
xd["Tags"] = buildStackTags(options)
return xd
except Exception as e:
fname = sys._getframe().f_code.co_name
errorRaise(fname, e)
def getTemplate(fn):
try:
op = None
with open(fn, "r") as ifn:
lines = ifn.readlines()
for line in lines:
if op is None:
op = line
else:
op += line
return op
except Exception as e:
fname = sys._getframe().f_code.co_name
errorRaise(fname, e)
def deleteStack(self, stackname):
try:
self.client.delete_stack(StackName=stackname)
except Exception as e:
fname = sys._getframe().f_code.co_name
errorRaise(fname, e)
