sw-patch-agent waits the new mgmt IP config

During the management network reconfiguration, the system is restarted
to controller_config script runs the puppet code and update
all services to use the new mgmt IP address.
But the sw-patch services start before the controller_config.
When they start they get the mgmt_ip using the python socket lib that
uses the IP address from the /etc/hosts.
But /etc/hosts at that time is not updated yet, so it get the old
management network IP.
To fix this issue, the sw-patch services will wait for the puppet
code to be applied to make sure the /etc/hosts and new management
network IPs were installed in the system.

Tests done:
IPv4 AIO-SX fresh install
IPv4 AIO-DX fresh install
IPv4 DC with subcloud AIO-SX fresh install
IPv4 AIO-SX mgmt reconfig and apply a non-reboot-required patch
IPv4 AIO-SX mgmt reconfig and apply a reboot-required patch
IPv4 subcloud AIO-SX mgmt reconfig and apply a non-reboot-required patch

IPv4 subcloud AIO-SX mgmt reconfig and apply a reboot-required patch
     For this test the sw-patch was in failed state after the reboot,
     It happens even without the mgmt reconfig and this fix

Partial-Bug: #2060066
Story: 2010722
Task: 49827

Depends-On: https://review.opendev.org/c/starlingx/config/+/914710
Change-Id: Ie544425513ef4fede73b4b55770ad6857cdf7eed
Signed-off-by: Fabiano Correa Mercer <fabiano.correamercer@windriver.com>

software/software/config.py

@@ -131,8 +131,20 @@ def read_config():
 
 def get_mgmt_ip():
     # Check if initial config is complete
-    if not os.path.exists('/etc/platform/.initial_config_complete'):
+    if not os.path.exists(tsc.INITIAL_CONFIG_COMPLETE_FLAG):
         return None
+
+    # Due to https://storyboard.openstack.org/#!/story/2010722
+    # the management IP for AIO-SX can be reconfigured during the startup.
+    # Check if /var/run/.<node>_config_complete exists to be sure that IP
+    # address will be the correct mgmt IP
+    try:
+        if tsc.system_mode == constants.SYSTEM_MODE_SIMPLEX and \
+           not os.path.exists(tsc.VOLATILE_CONTROLLER_CONFIG_COMPLETE):
+            return None
+    except Exception:
+        logging.info("not able to get system_mode, continue sw-patch services")
+
     mgmt_hostname = socket.gethostname()
     return utils.gethostbyname(mgmt_hostname)
 

sw-patch/cgcs-patch/cgcs_patch/config.py

@@ -79,8 +79,20 @@ def read_config():
 
 def get_mgmt_ip():
     # Check if initial config is complete
-    if not os.path.exists('/etc/platform/.initial_config_complete'):
+    if not os.path.exists(tsc.INITIAL_CONFIG_COMPLETE_FLAG):
         return None
+
+    # Due to https://storyboard.openstack.org/#!/story/2010722
+    # the management IP for AIO-SX can be reconfigured during the startup.
+    # Check if /var/run/.<node>_config_complete exists to be sure that IP
+    # address will be the correct mgmt IP
+    try:
+        if tsc.system_mode == constants.SYSTEM_MODE_SIMPLEX and \
+           not os.path.exists(tsc.VOLATILE_CONTROLLER_CONFIG_COMPLETE):
+            return None
+    except Exception:
+        logging.info("not able to get system_mode, continue sw-patch services")
+
     mgmt_hostname = socket.gethostname()
     return utils.gethostbyname(mgmt_hostname)
 

sw-patch/cgcs-patch/cgcs_patch/constants.py

@@ -56,3 +56,6 @@ LOOPBACK_INTERFACE_NAME = "lo"
 SEMANTIC_PREAPPLY = 'pre-apply'
 SEMANTIC_PREREMOVE = 'pre-remove'
 SEMANTIC_ACTIONS = [SEMANTIC_PREAPPLY, SEMANTIC_PREREMOVE]
+
+SYSTEM_MODE_SIMPLEX = "simplex"
+SYSTEM_MODE_DUPLEX = "duplex"