As a part of warmboot, redis database is dumped:
https://github.com/Azure/sonic-utilities/blob/c97fe546e5a725b9049047293a4fede48fde5223/scripts/fast-reboot#L269
However, this dump file is deleted, after it is loaded back into db post reboot.
The DB dump can be useful for debugging purpose, hence taking a backup of it can be useful.
Instead of deleting the dump, rename and keep the dump.

As a part of warmboot, redis database is dumped:
https://github.com/Azure/sonic-utilities/blob/c97fe546e5a725b9049047293a4fede48fde5223/scripts/fast-reboot#L269
However, this dump file is deleted, after it is loaded back into db post reboot.
The DB dump can be useful for debugging purpose, hence taking a backup of it can be useful.
Instead of deleting the dump, rename and keep the dump.

Back porting the master branch change - #8803

Save the redis DB dump after warm reboot.

* Add DHCPv6 minigraph parsing support

Co-authored-by: shlomibitton <[email protected]>

Logrotate for wtmp and btmp files to fix size getting too large. (sonic-net#8744)

Signed-off-by: Abhishek Dosi <[email protected]>

[201811][utilities][swss][snmpagent] advance sub module head

snmpagent
* 187aa10 2021-09-16 | [201811][RFC1213]: Initialize lag oid map in reinit_data (sonic-net#233) (github/201811) [SuvarnaMeenakshi]

swss:
* 3503705 2021-09-05 | [201811][Cherry-pick] [acl mirror action] Mirror session ref count fix at acl rule attachment (sonic-net#1898) (HEAD -> 201811, github/201811) [bingwang-ms]

utilities:
* f3f8667 2021-10-15 | [201811] disk_check.py: Allow remote user access when disk is read-only (sonic-net#1873) (HEAD -> 201811, github/201811) [Renuka Manavalan]
* 6b351c9 2021-10-14 | [201811]  Remove exec from platform_reboot_plugin call to handle any hang issue. (sonic-net#1880) [Sujin Kang]
* d8d0461 2021-07-29 | [minigraph][port_config] Consume port_config.json while reloading minigraph (sonic-net#1726) [Blueve]

Signed-off-by: Ying Xie <[email protected]>

[201811] Invoke disk check periodically (sonic-net#8951)

* Invoke disk check periodically. (sonic-net#7374)

Why I did it
Helps with periodic scan of disk for RO state.
If found, this script makes transient fix and raise error message.

Save DB dump after warm/fast reboot (sonic-net#8913)

Back porting the master branch change - sonic-net#8803

Save the redis DB dump after warm reboot.

[201811][swss] advance swss submodule head (sonic-net#9049)

* e0b115a 2021-10-22 | [copp] add dhcpv6 copp rules (sonic-net#1979) (HEAD -> 201811, github/201811) [Ying Xie]

Signed-off-by: Ying Xie <[email protected]>

[swssconfig] load dhcpv6 copp rules by default (sonic-net#9047)

Why I did it
Need to enable DHCPv6 copp rule

How I did it
Add a separate DHCPv6 copp rule config file and load it during cold reboot.

How to verify it
cold reboot, and verify config being loaded and dhcpv6 rules got installed.

Signed-off-by: Ying Xie [email protected]

[warmboot finalizer] load dhcpv6 copp rules when missing (sonic-net#9048)

Why I did it
Need to enable DHCPv6 COPP rules.

How I did it
Load the separate DHCPv6 COPP rules after warm reboot if the rules are missing.

How to verify it
Warm reboot from an image doesn't have DHCPv6 COPP rules installed.
Warm reboot from an image have DHCPv6 COPP rules already installed.
In either case, the script did the right thing and only install the COPP rules if it is missing.

Signed-off-by: Ying Xie [email protected]

* Add DHCPv6 minigraph parsing support

Co-authored-by: shlomibitton <[email protected]>

Logrotate for wtmp and btmp files to fix size getting too large. (#8744)

Signed-off-by: Abhishek Dosi <[email protected]>

[201811][utilities][swss][snmpagent] advance sub module head

snmpagent
* 187aa10 2021-09-16 | [201811][RFC1213]: Initialize lag oid map in reinit_data (#233) (github/201811) [SuvarnaMeenakshi]

swss:
* 3503705 2021-09-05 | [201811][Cherry-pick] [acl mirror action] Mirror session ref count fix at acl rule attachment (#1898) (HEAD -> 201811, github/201811) [bingwang-ms]

utilities:
* f3f8667 2021-10-15 | [201811] disk_check.py: Allow remote user access when disk is read-only (#1873) (HEAD -> 201811, github/201811) [Renuka Manavalan]
* 6b351c9 2021-10-14 | [201811]  Remove exec from platform_reboot_plugin call to handle any hang issue. (#1880) [Sujin Kang]
* d8d0461 2021-07-29 | [minigraph][port_config] Consume port_config.json while reloading minigraph (#1726) [Blueve]

Signed-off-by: Ying Xie <[email protected]>

[201811] Invoke disk check periodically (#8951)

* Invoke disk check periodically. (#7374)

Why I did it
Helps with periodic scan of disk for RO state.
If found, this script makes transient fix and raise error message.

Save DB dump after warm/fast reboot (#8913)

Back porting the master branch change - #8803

Save the redis DB dump after warm reboot.

[201811][swss] advance swss submodule head (#9049)

* e0b115a 2021-10-22 | [copp] add dhcpv6 copp rules (#1979) (HEAD -> 201811, github/201811) [Ying Xie]

Signed-off-by: Ying Xie <[email protected]>

[swssconfig] load dhcpv6 copp rules by default (#9047)

Why I did it
Need to enable DHCPv6 copp rule

How I did it
Add a separate DHCPv6 copp rule config file and load it during cold reboot.

How to verify it
cold reboot, and verify config being loaded and dhcpv6 rules got installed.

Signed-off-by: Ying Xie [email protected]

[warmboot finalizer] load dhcpv6 copp rules when missing (#9048)

Why I did it
Need to enable DHCPv6 COPP rules.

How I did it
Load the separate DHCPv6 COPP rules after warm reboot if the rules are missing.

How to verify it
Warm reboot from an image doesn't have DHCPv6 COPP rules installed.
Warm reboot from an image have DHCPv6 COPP rules already installed.
In either case, the script did the right thing and only install the COPP rules if it is missing.

Signed-off-by: Ying Xie [email protected]