preserve old order for config reload

[arlakshm]

Signed-off-by: Arvindsrinivasan Lakshmi Narasimhan [email protected]

What I did

Fixes sonic-net/sonic-buildimage#9473

How I did it

Preserve the old order of the config reload

How to verify it

Manual tests

• change SFLOW feature state

admin@vlab-01:~$ show feature status
Feature         State            AutoRestart     SetOwner
--------------  ---------------  --------------  ----------
bgp             enabled          enabled
database        always_enabled   always_enabled
dhcp_relay      enabled          enabled         local
gbsyncd         enabled          enabled
lldp            enabled          enabled
macsec          disabled         enabled
mgmt-framework  enabled          enabled
mux             always_disabled  enabled
nat             disabled         enabled
pmon            enabled          enabled
radv            enabled          enabled
sflow           disabled         enabled
snmp            enabled          enabled
swss            enabled          enabled
syncd           enabled          enabled
teamd           enabled          enabled
telemetry       enabled          enabled

admin@vlab-01:~$ sudo config feature state sflow enabled
admin@vlab-01:~$ show feature status
Feature         State            AutoRestart     SetOwner
--------------  ---------------  --------------  ----------
bgp             enabled          enabled
database        always_enabled   always_enabled
dhcp_relay      enabled          enabled         local
gbsyncd         enabled          enabled
lldp            enabled          enabled
macsec          disabled         enabled
mgmt-framework  enabled          enabled
mux             always_disabled  enabled
nat             disabled         enabled
pmon            enabled          enabled
radv            enabled          enabled
sflow           enabled          enabled
snmp            enabled          enabled
swss            enabled          enabled
syncd           enabled          enabled
teamd           enabled          enabled
telemetry       enabled          enabled

• save config and do config reload

admin@vlab-01:~$ sudo config save
Existing files will be overwritten, continue? [y/N]: y
Running command: /usr/local/bin/sonic-cfggen -d --print-data > /etc/sonic/config_db.json
admin@vlab-01:~$ sudo config reload -y
Running command: rm -rf /tmp/dropstat-*
Disabling container monitoring ...
Stopping SONiC target ...
Running command: /usr/local/bin/sonic-cfggen  -j /etc/sonic/init_cfg.json  -j /etc/sonic/config_db.json  --write-to-db
Running command: /usr/local/bin/db_migrator.py -o migrate
Running command: /usr/local/bin/sonic-cfggen -d -y /etc/sonic/sonic_version.yml -t /usr/share/sonic/templates/sonic-environment.j2,/etc/sonic/sonic-environment
Restarting SONiC target ...
Enabling container monitoring ...
Reloading Monit configuration ...
Reinitializing monit daemon

• verify the feature state is same as before config reload

admin@vlab-01:~$ show feature status
Feature         State            AutoRestart     SetOwner
--------------  ---------------  --------------  ----------
bgp             enabled          enabled
database        always_enabled   always_enabled
dhcp_relay      enabled          enabled         local
gbsyncd         enabled          enabled
lldp            enabled          enabled
macsec          disabled         enabled
mgmt-framework  enabled          enabled
mux             always_disabled  enabled
nat             disabled         enabled
pmon            enabled          enabled
radv            enabled          enabled
sflow           enabled          enabled
snmp            enabled          enabled
swss            enabled          enabled
syncd           enabled          enabled
teamd           enabled          enabled
telemetry       enabled          enabled

Previous command output (if the output of a command-line utility has changed)

New command output (if the output of a command-line utility has changed)