/etc/one/im_ec2/im_ec2.conf is in opennebula 3.2.1-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 | #-------------------------------------------------------------------------------
# Max number of instances that can be launched into EC2
#-------------------------------------------------------------------------------
SMALL_INSTANCES=5
LARGE_INSTANCES=
EXTRALARGE_INSTANCES=
|