def wait_for_metadata_service(self):
mcfg = self.ds_cfg
if not hasattr(mcfg, "get"):
mcfg = {}
max_wait = 120
try:
max_wait = int(mcfg.get("max_wait", max_wait))
except Exception:
util.logexc(log)
log.warn("Failed to get max wait. using %s" % max_wait)
if max_wait == 0:
return False
timeout = 50
try:
timeout = int(mcfg.get("timeout", timeout))
except Exception:
util.logexc(log)
log.warn("Failed to get timeout, using %s" % timeout)
def_mdurls = ["http://169.254.169.254", "http://instance-data:8773"]
mdurls = mcfg.get("metadata_urls", def_mdurls)
# Remove addresses from the list that wont resolve.
filtered = [x for x in mdurls if util.is_resolvable_url(x)]
if set(filtered) != set(mdurls):
log.debug(
"Removed the following unresolveable addrs from metadata urls: %s" % list((set(mdurls) - set(filtered)))
)
if len(filtered):
mdurls = filtered
else:
log.warn("Empty metadata url list! using default list %s", def_mdurls)
mdurls = def_mdurls
urls = []
url2base = {}
for url in mdurls:
cur = "%s/%s/meta-data/instance-id" % (url, self.api_ver)
urls.append(cur)
url2base[cur] = url
starttime = time.time()
def status_cb(url, why, details):
log.warn("Calling %r failed due to %r: %s", url, why, details)
url = wait_for_metadata_service(urls=urls, max_wait=max_wait, timeout=timeout, status_cb=status_cb)
if url:
log.info("Using metadata source: '%s'" % url2base.get(url))
else:
log.critical("Giving up on metadata fetching after %i seconds" % int(time.time() - starttime))
self.metadata_address = url2base.get(url) or False
return bool(url)
def status_cb(url, why, details):
log.warn("Calling %r failed due to %r: %s", url, why, details)
