From 703241a3c50f2cfec21e7c8e90616c3378ebbea2 Mon Sep 17 00:00:00 2001 From: Andrew Jorgensen Date: Mon, 27 Nov 2017 21:54:09 +0000 Subject: ec2: Use instance-identity doc for region and instance-id The instance identity document is a better source for region information, partly because region isn't actually in meta-data at all, only availability-zone, which happens to be named similarly. Reviewed-by: Ethan Faust Reviewed-by: Cyle Riggs Reviewed-by: Tom Kirchner Reviewed-by: Matt Nierzwicki [ajorgens@amazon.com: rebase onto 0.7.9] [ajorgens@amazon.com: changes per merge proposal discussions] --- cloudinit/distros/__init__.py | 15 +++++++-------- 1 file changed, 7 insertions(+), 8 deletions(-) (limited to 'cloudinit/distros') diff --git a/cloudinit/distros/__init__.py b/cloudinit/distros/__init__.py index 99e60e7a..55260eae 100755 --- a/cloudinit/distros/__init__.py +++ b/cloudinit/distros/__init__.py @@ -45,6 +45,10 @@ OSFAMILIES = { LOG = logging.getLogger(__name__) +# This is a best guess regex, based on current EC2 AZs on 2017-12-11. +# It could break when Amazon adds new regions and new AZs. +_EC2_AZ_RE = re.compile('^[a-z][a-z]-(?:[a-z]+-)+[0-9][a-z]$') + @six.add_metaclass(abc.ABCMeta) class Distro(object): @@ -683,18 +687,13 @@ def _get_package_mirror_info(mirror_info, data_source=None, if not mirror_info: mirror_info = {} - # ec2 availability zones are named cc-direction-[0-9][a-d] (us-east-1b) - # the region is us-east-1. so region = az[0:-1] - directions_re = '|'.join([ - 'central', 'east', 'north', 'northeast', 'northwest', - 'south', 'southeast', 'southwest', 'west']) - ec2_az_re = ("^[a-z][a-z]-(%s)-[1-9][0-9]*[a-z]$" % directions_re) - subst = {} if data_source and data_source.availability_zone: subst['availability_zone'] = data_source.availability_zone - if re.match(ec2_az_re, data_source.availability_zone): + # ec2 availability zones are named cc-direction-[0-9][a-d] (us-east-1b) + # the region is us-east-1. so region = az[0:-1] + if _EC2_AZ_RE.match(data_source.availability_zone): subst['ec2_region'] = "%s" % data_source.availability_zone[0:-1] if data_source and data_source.region: -- cgit v1.2.3