[taler-deployment] branch master updated: reuse loop checker

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ms pushed a commit to branch master
in repository deployment.

The following commit(s) were added to refs/heads/master by this push:
     new 30863ef  reuse loop checker
30863ef is described below

commit 30863eff4bb2f83fff89f962d045266e220d9124
Author: MS <ms@taler.net>
AuthorDate: Thu Aug 25 16:11:32 2022 +0200

    reuse loop checker
---
 bin/taler-gv | 32 +++++++++++++++++++++++---------
 1 file changed, 23 insertions(+), 9 deletions(-)

diff --git a/bin/taler-gv b/bin/taler-gv
index a63bfca..9e6693c 100755
--- a/bin/taler-gv
+++ b/bin/taler-gv
@@ -529,6 +529,27 @@ CURRENCY = "KUDOS"
 def prepare(postgres_db_name):
     """Generate configuration, run-time blobs, instances, euFin accounts."""
 
+    def is_serving(check_url, tries=10):
+        for i in range(tries):
+            try:
+                print_nn(".")
+                # Raises if the service is not reachable.
+                response = requests.get(
+                    check_url,
+                    timeout=1
+                )
+                # The reverse proxy may return 500 if the
+                # end service is not ready, therefore this
+                # case should be tolerated.
+                response.raise_for_status()
+            except:
+                time.sleep(0.5)
+                if i == tries - 1:
+                    return False
+                continue
+            break
+        return True
+
     def fail(reason=None):
         if reason:
             print("ERROR:", reason)
@@ -1315,15 +1336,8 @@ def prepare(postgres_db_name):
     print(" OK")
     print_nn("Launching the exchange...")
     subprocess.run(["systemctl", "--user", "start", 
"taler-local-exchange-httpd.service"])
-    res = requests.get("https://exchange.demo.taler.net/";)
-    res_count = 0
-    while res.status_code != 200:
-        if res_count == 10:
-            print("Exchange unreachable")
-            sys.exit(1)
-        res_count = res_count + 1
-        time.sleep(1)
-        res = requests.get("https://exchange.demo.taler.net/";)
+    if not is_serving("https://exchange.demo.taler.net/";):
+        fail(f"Exchange did not start correctly.")
     print(" OK")
     print_nn("exchange-offline: signing key material...")
     Command([

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