cloudsw1-c8-eqiad and cloudsw1-d5-eqiad are running JunOS 18.4R2-S4.10.
Opening this task to track upgrading them to JunOS 20+ to bring them into line with the other cloudsw devices (which are on 20.2 and 20.4).
Plan will be to upgrade each switch one by one. The 'cloudsw2' devices in each of these racks are daisy-chained from the respective cloudsw1 device in the same rack. So when we upgrade each all hosts in that rack will be offline for the duration of the work. Connectivity to hosts in other racks should remain up throughout.
In total the upgrade of each device should be in the region of 20-30 minutes. During this time all hosts in the rack will suffer a complete network outage. So we should do it under a maintenance window, and depool, prep or otherwise do what is required to minimize the impact. We should make sure the active cloudnet and cloudgw hosts are manually switched in advance also.
The hosts that will be affected are as follows:
Rack C8 (also including hosts in row B which connect via this switch):
cloudbackup1003 cloudcephmon1001 cloudcephmon1003 cloudcephosd1001 cloudcephosd1002 cloudcephosd1003 cloudcephosd1004 cloudcephosd1005 cloudcephosd1006 cloudcephosd1007 cloudcephosd1008 cloudcephosd1009 cloudcephosd1016 cloudcephosd1017 cloudcephosd1018 cloudcephosd1021 cloudcephosd1022 cloudgw1001 cloudnet1005 cloudvirt1017 cloudvirt1019 cloudvirt1020 cloudvirt1021 cloudvirt1022 cloudvirt1023 cloudvirt1024 cloudvirt1025 cloudvirt1026 cloudvirt1027 cloudvirt1031 cloudvirt1032 cloudvirt1033 cloudvirt1034 cloudvirt1035 cloudvirt-wdqs1001 cloudvirt-wdqs1002 cloudvirt-wdqs1003
cloudbackup1004 cloudcephmon1002 cloudcephosd1010 cloudcephosd1011 cloudcephosd1012 cloudcephosd1013 cloudcephosd1014 cloudcephosd1015 cloudcephosd1019 cloudcephosd1020 cloudcephosd1023 cloudcephosd1024 cloudgw1002 cloudnet1006 cloudvirt1028 cloudvirt1029 cloudvirt1030 cloudvirt1036 cloudvirt1037 cloudvirt1038 cloudvirt1039 cloudvirt1040 cloudvirt1041 cloudvirt1042 cloudvirt1043 cloudvirt1044 cloudvirt1045 cloudvirt1046 cloudvirt1047