move things from modules/roles/static* to modules/static*

[mirror/dsa-puppet.git] / modules / roles / files / mirror_health / mirror-health

diff --git a/modules/roles/files/mirror_health/mirror-health b/modules/roles/files/mirror_health/mirror-health
index c2ef590..bbd4c27 100755 (executable)
--- a/modules/roles/files/mirror_health/mirror-health
+++ b/modules/roles/files/mirror_health/mirror-health
@@ -5,6 +5,7 @@ import requests
 import time
 import calendar
 import logging
+import subprocess
 from email.utils import parsedate
 logging.basicConfig(level=logging.INFO)
 
@@ -12,16 +13,16 @@ HOSTS = os.environ['MIRROR_CHECK_HOSTS'].split()
 OUTPUT_DIR = "/run/dsa-mirror-health-{}".format(os.environ['MIRROR_CHECK_SERVICE'])
 HEALTH_FILE = os.path.join(OUTPUT_DIR, "health")
 URL = os.environ['MIRROR_CHECK_URL']
+HEALTH_CHECK_URL = os.environ['MIRROR_CHECK_HEALTH_URL']
 INTERVAL = int(os.environ.get('MIRROR_CHECK_INTERVAL', '60'))
 
-latest_ts = 0
-
 def retrieve_from_host(host, url):
     proxies = {
         'http': 'http://{}:80'.format(host),
         'https': 'http://{}:443'.format(host),
     }
-    return requests.get(url, timeout=5, proxies=proxies, allow_redirects=False)
+    headers = {'User-Agent': 'mirror-health'}
+    return requests.get(url, headers=headers, timeout=5, proxies=proxies, allow_redirects=False)
 
 def last_modified(response):
     lm = 0
@@ -29,24 +30,47 @@ def last_modified(response):
         lm = calendar.timegm(parsedate(response.headers['last-modified']))
     return lm
 
+def healthy(response):
+    if response.status_code == 200:
+        return True
+    return False
+
+def check_shutdown():
+    if subprocess.call(['dsa-is-shutdown-scheduled']) == 0:
+        logging.info("considering myself unhealthy, shutdown scheduled")
+        return False
+    return True
+
+def check_uptodate():
+    latest_ts = 0
+    for host in HOSTS:
+        try:
+            lm = last_modified(retrieve_from_host(host, URL))
+            logging.debug("lm for host %s: %s", host, lm)
+            if healthy(retrieve_from_host(host, HEALTH_CHECK_URL)):
+                latest_ts = max(latest_ts, lm)
+        except (requests.exceptions.ProxyError, requests.exceptions.ReadTimeout, requests.exceptions.ConnectTimeout, requests.exceptions.ConnectionError):
+            pass
+    try:
+        local_lm = last_modified(retrieve_from_host('localhost', URL))
+    except (requests.exceptions.ProxyError, requests.exceptions.ReadTimeout, requests.exceptions.ConnectTimeout, requests.exceptions.ConnectionError):
+        return False
+    logging.debug("lm for localhost: %s", local_lm)
+    if local_lm < latest_ts:
+        logging.info("considering myself unhealthy my ts=%s latest_ts=%s", local_lm, latest_ts)
+        return False
+    return True
+
 while True:
     start = time.time()
-    for host in HOSTS:
-        lm = last_modified(retrieve_from_host(host, URL))
-        logging.debug("lm for host %s: %s", host, lm)
-        if lm > latest_ts:
-            latest_ts = lm
-    local_lm = last_modified(retrieve_from_host('localhost', URL))
-    logging.debug("lm for localhost: %s", lm)
-    if latest_ts <= local_lm:
+    if check_shutdown() and check_uptodate():
+        logging.info("considering myself healthy")
+        open(HEALTH_FILE, 'w').write("OK")
+    else:
         try:
-            logging.info("considering myself unhealthy my ts=%s latest_ts=%s", local_lm, latest_ts)
             os.remove(HEALTH_FILE)
         except OSError:
             pass
-    else:
-        logging.info("considering myself healthy")
-        open(HEALTH_FILE, 'w').write("OK")
     sleep_time = start + INTERVAL - time.time()
     logging.debug("sleeping for %d seconds", sleep_time)
     time.sleep(sleep_time)