CI Use dedicated NTP servers

Failed job
https://github.com/ScaleComputing/HyperCoreAnsibleCollection/actions/runs/4625947983/jobs/8182201867#step:8:120

Hopefully this will lessen load on pool.ntp.org, so we can continue
to use it when not testing.

Signed-off-by: Justin Cinkelj <justin.cinkelj@xlab.si>

Author: justinc1

ci-infra/ntp-chrony/Readme.md

@@ -0,0 +1,19 @@
+We need a reliable 2 NTP servers for testing NTP reconfiguration.
+
+Setup them once in VMs
+
+```
+apt install -y chrony ntpdate
+cat /etc/chrony/chrony.conf
+  # See chrony.conf example file.
+  # Just add 'allow all' line if needed
+grep 'allow all' /etc/chrony/chrony.conf || echo 'allow all'
+
+systemctl enable chrony
+systemctl restart chrony
+chronyc tracking
+
+ntpdate -qup1 localhost
+```
+
+Check from outside if firewall allows NTP traffic - port 123/UDP.

ci-infra/ntp-chrony/chrony.conf

@@ -0,0 +1,47 @@
+# Welcome to the chrony configuration file. See chrony.conf(5) for more
+# information about usuable directives.
+
+# This will use (up to):
+# - 4 sources from ntp.ubuntu.com which some are ipv6 enabled
+# - 2 sources from 2.ubuntu.pool.ntp.org which is ipv6 enabled as well
+# - 1 source from [01].ubuntu.pool.ntp.org each (ipv4 only atm)
+# This means by default, up to 6 dual-stack and up to 2 additional IPv4-only
+# sources will be used.
+# At the same time it retains some protection against one of the entries being
+# down (compare to just using one of the lines). See (LP: #1754358) for the
+# discussion.
+#
+# About using servers from the NTP Pool Project in general see (LP: #104525).
+# Approved by Ubuntu Technical Board on 2011-02-08.
+# See http://www.pool.ntp.org/join.html for more information.
+pool ntp.ubuntu.com        iburst maxsources 4
+pool 0.ubuntu.pool.ntp.org iburst maxsources 1
+pool 1.ubuntu.pool.ntp.org iburst maxsources 1
+pool 2.ubuntu.pool.ntp.org iburst maxsources 2
+
+# This directive specify the location of the file containing ID/key pairs for
+# NTP authentication.
+keyfile /etc/chrony/chrony.keys
+
+# This directive specify the file into which chronyd will store the rate
+# information.
+driftfile /var/lib/chrony/chrony.drift
+
+# Uncomment the following line to turn logging on.
+#log tracking measurements statistics
+
+# Log files location.
+logdir /var/log/chrony
+
+# Stop bad estimates upsetting machine clock.
+maxupdateskew 100.0
+
+# This directive enables kernel synchronisation (every 11 minutes) of the
+# real-time clock. Note that it can't be used along with the 'rtcfile' directive.
+rtcsync
+
+# Step the system clock instead of slewing it if the adjustment is larger than
+# one second, but only in the first three clock updates.
+makestep 1 3
+
+allow all

tests/integration/targets/role_cluster_config/tasks/main.yml

@@ -29,7 +29,7 @@
         # certificate: plain_text_from_x509
         config_url: https://login.microsoftonline.com/76d4c62a-a9ca-4dc2-9187-e2cc4d9abe7f/v2.0/.well-known/openid-configuration
         scopes: openid+profile
-      time_server: 2.pool.ntp.org
+      time_server: 10.5.11.5
       time_zone: Europe/Ljubljana
       smtp:
         server: mail_a.example.com
@@ -71,7 +71,7 @@
         # certificate: plain_text_from_x509
         config_url: https://login.microsoftonline.com/76d4c62a-a9ca-4dc2-9187-e2cc4d9abe7f/v2.0/.well-known/openid-configuration
         scopes: openid+profile
-      time_server: 3.pool.ntp.org
+      time_server: 10.5.11.7
       time_zone: Europe/Zagreb
       smtp:
         server: mail_b.example.com

tests/integration/targets/time_server/tasks/01_time_server_info.yml

@@ -6,7 +6,9 @@
 
   vars:
     actual_uuid: "timesource_guid"
-    actual_host: "3.pool.ntp.org"
+    # We need 2 NTP servers.
+    # Set them up per ci-infra/ntp-chrony/Readme.md.
+    actual_host: "10.5.11.5"
 
   block:
     # -------------------------------------------------------

tests/integration/targets/time_server/tasks/02_time_server.yml

@@ -5,8 +5,10 @@
     SC_PASSWORD: "{{ sc_config[sc_host].sc_password }}"
     SC_TIMEOUT: "{{ sc_timeout * 10 }}"
   vars:
-    time_server_a: 2.pool.ntp.org
-    time_server_b: 3.pool.ntp.org
+    # We need 2 NTP servers.
+    # Set them up per ci-infra/ntp-chrony/Readme.md.
+    time_server_a: 10.5.11.5
+    time_server_b: 10.5.11.7
     actual_uuid: timesource_guid
 
   block: