[root@rhel7 cloud-init]# cat cloud-init-generator.log
/usr/lib/systemd/system-generators/cloud-init-generator normal=/run/systemd/generator early=/run/systemd/generator.early late=/run/systemd/generator.late
kernel command line (/proc/cmdline): BOOT_IMAGE=/boot/vmlinuz-3.10.0-1062.1.1.el7.x86_64 root=UUID=381ced07-e075-4d05-8e58-bc00059825f2 ro console=tty0 console=ttyS0,115200n8 no_timer_check net.ifnames=0 crashkernel=auto LANG=en_US.UTF-8
kernel_cmdline found unset
etc_file found unset
default found enabled
checking for datasource
ds-identify rc=1
ds-identify _RET=notfound
cloud-init is enabled but no datasource found, disabling
already disabled: no change needed [no /run/systemd/generator.early/multi-user.target.wants/cloud-init.target]


[root@rhel7 cloud-init]# cat ds-identify.log
[up 5.74s] ds-identify
policy loaded: mode=search report=false found=all maybe=all notfound=disabled
/etc/cloud/cloud.cfg set datasource_list: ["NoCloud", "ConfigDrive"]
DMI_PRODUCT_NAME=RHEV Hypervisor
DMI_SYS_VENDOR=Red Hat
DMI_PRODUCT_SERIAL=90f70380-2122-4b01-8abf-1d67f2006725
DMI_PRODUCT_UUID=BE9CCA47-FD61-4B2F-B74F-1574E15DC37D
PID_1_PRODUCT_NAME=unavailable
DMI_CHASSIS_ASSET_TAG=
FS_LABELS=
ISO9660_DEVS=
KERNEL_CMDLINE=BOOT_IMAGE=/boot/vmlinuz-3.10.0-1062.1.1.el7.x86_64 root=UUID=381ced07-e075-4d05-8e58-bc00059825f2 ro console=tty0 console=ttyS0,115200n8 no_timer_check net.ifnames=0 crashkernel=auto LANG=en_US.UTF-8
VIRT=kvm
UNAME_KERNEL_NAME=Linux
UNAME_KERNEL_RELEASE=3.10.0-1062.1.1.el7.x86_64
UNAME_KERNEL_VERSION=#1 SMP Tue Aug 13 18:39:59 UTC 2019
UNAME_MACHINE=x86_64
UNAME_NODENAME=rhel7.7-cloud-init-test-vm-test
UNAME_OPERATING_SYSTEM=GNU/Linux
DSNAME=
DSLIST=NoCloud ConfigDrive
MODE=search
ON_FOUND=all
ON_MAYBE=all
ON_NOTFOUND=disabled
pid=392 ppid=387
is_container=false
is_ds_enabled(IBMCloud) = false.
No ds found [mode=search, notfound=disabled]. Disabled cloud-init [1]
[up 5.82s] returning 1