Checking on the lun numbers Diff comments:
> diff --git a/udev/66-azure-ephemeral.rules b/udev/66-azure-ephemeral.rules > index b9c5c3e..2406df3 100644 > --- a/udev/66-azure-ephemeral.rules > +++ b/udev/66-azure-ephemeral.rules > @@ -4,10 +4,26 @@ SUBSYSTEM!="block", GOTO="cloud_init_end" > ATTRS{ID_VENDOR}!="Msft", GOTO="cloud_init_end" > ATTRS{ID_MODEL}!="Virtual_Disk", GOTO="cloud_init_end" > > -# Root has a GUID of 0000 as the second value > +# Root has a GUID of 0000 as the second value on Gen1 instances > # The resource/resource has GUID of 0001 as the second value > ATTRS{device_id}=="?00000000-0000-*", ENV{fabric_name}="azure_root", > GOTO="ci_azure_names" > ATTRS{device_id}=="?00000000-0001-*", ENV{fabric_name}="azure_resource", > GOTO="ci_azure_names" > + > +# Azure well known SCSI controllers > +ATTRS{device_id}=="{f8b3781a-1e82-4818-a1c3-63d806ec15bb}", > ENV{fabric_scsi_controller}="scsi0", GOTO="azure_datadisk" I can confirm the first half of that question, that device_id is hardcoded to be scsi0. (see here for reference: https://github.com/Azure/WALinuxAgent/blob/master/config/66-azure-storage.rules) lun0/1 for root/resource sounds logical, I'll get back to verify explicitly that this assumption is always true > +# Do not create symlinks for scsi[1-3] or unmatched device_ids > +ATTRS{device_id}=="{f8b3781b-1e82-4818-a1c3-63d806ec15bb}", > ENV{fabric_scsi_controller}="scsi1", GOTO="cloud_init_end" > +ATTRS{device_id}=="{f8b3781c-1e82-4818-a1c3-63d806ec15bb}", > ENV{fabric_scsi_controller}="scsi2", GOTO="cloud_init_end" > +ATTRS{device_id}=="{f8b3781d-1e82-4818-a1c3-63d806ec15bb}", > ENV{fabric_scsi_controller}="scsi3", GOTO="cloud_init_end" > +GOTO="cloud_init_end" > + > +# Map scsi#/lun# fabric_name to azure_root|resource on Gen2 instances > +LABEL="azure_datadisk" > +ENV{DEVTYPE}=="partition", PROGRAM="/bin/sh -c 'readlink > /sys/class/block/%k/../device|cut -d: -f4'", > ENV{fabric_name}="$env{fabric_scsi_controller}/lun$result" > +ENV{DEVTYPE}=="disk", PROGRAM="/bin/sh -c 'readlink > /sys/class/block/%k/device|cut -d: -f4'", > ENV{fabric_name}="$env{fabric_scsi_controller}/lun$result" > + > +ENV{fabric_name}=="scsi0/lun0", ENV{fabric_name}="azure_root", > GOTO="ci_azure_names" > +ENV{fabric_name}=="scsi0/lun1", ENV{fabric_name}="azure_resource", > GOTO="ci_azure_names" > GOTO="cloud_init_end" > > # Create the symlinks -- https://code.launchpad.net/~chad.smith/cloud-init/+git/cloud-init/+merge/358190 Your team cloud-init commiters is requested to review the proposed merge of ~chad.smith/cloud-init:feature/1797480-azure-support-gen2-instances into cloud-init:master. _______________________________________________ Mailing list: https://launchpad.net/~cloud-init-dev Post to : cloud-init-dev@lists.launchpad.net Unsubscribe : https://launchpad.net/~cloud-init-dev More help : https://help.launchpad.net/ListHelp