# HG changeset patch
# User Franz Glasner <fzglas.hg@dom66.de>
# Date 1607302284 -3600
# Node ID 503768f91a05e5e617cf9a902e29df0bbec7490e
# Parent  da159603495447cf54062a7393eb1b4819c1a40a
More granular configuration of retrieving AWS metadata: retries with backoff setting

diff -r da1596034954 -r 503768f91a05 configmix/extras/aws.py
--- a/configmix/extras/aws.py	Mon Dec 07 01:06:33 2020 +0100
+++ b/configmix/extras/aws.py	Mon Dec 07 01:51:24 2020 +0100
@@ -15,6 +15,8 @@
 
 import requests
 import requests.exceptions
+import requests.adapters
+import urllib3
 
 
 _MARKER = object()
@@ -24,7 +26,9 @@
 URL_META_REGION = "http://169.254.169.254/latest/meta-data/placement/region"
 URL_META_AVAILABILITY_ZONE = "http://169.254.169.254/latest/meta-data/availability-zone"
 URL_DYN_INSTANCE_IDENTITY_DOC = "http://169.254.169.254/latest/dynamic/instance-identity/document"
-TIMEOUT = 10
+TIMEOUT = 2
+# See https://gist.github.com/doublenns/7e3e4b72df4aaeccbeabf87ba767f44e
+RETRIES = urllib3.Retry(total=3, backoff_factor=0.3)
 
 _meta_instanceid = None
 _meta_region = None
@@ -35,6 +39,8 @@
 def _get_text_req(url):
     with requests.Session() as sess:
         try:
+            a = requests.adapters.HTTPAdapter(max_retries=RETRIES)
+            sess.mount("http://", a)
             resp = sess.get(url, timeout=TIMEOUT)
             resp.raise_for_status()
             return resp.text
@@ -45,6 +51,8 @@
 def _get_json_req(url):
     with requests.Session() as sess:
         try:
+            a = requests.adapters.HTTPAdapter(max_retries=RETRIES)
+            sess.mount("http://", a)
             resp = sess.get(url, timeout=TIMEOUT)
             resp.raise_for_status()
             return resp.json()