@@ -53,11 +53,12 @@ IRONIC_VM_SSH_PORT=${IRONIC_VM_SSH_PORT:-22}

 IRONIC_VM_SSH_ADDRESS=${IRONIC_VM_SSH_ADDRESS:-$HOST_IP}

 IRONIC_VM_COUNT=${IRONIC_VM_COUNT:-1}

 IRONIC_VM_SPECS_CPU=${IRONIC_VM_SPECS_CPU:-1}

-# NOTE(agordeev): both ubuntu and fedora deploy images won't work with 256MB of RAM.

-#                 System halts and throws kernel panic during initramfs unpacking.

-#                 Ubuntu needs at least 384MB, but fedora requires 448.

-#                 So placing 512 here to satisfy both.

-IRONIC_VM_SPECS_RAM=${IRONIC_VM_SPECS_RAM:-512}

+# NOTE(adam_g): Kernels 3.12 and newer user tmpfs by default for initramfs.

+#               DIB produced ramdisks tend to be ~250MB but tmpfs will only allow

+#               use of 50% of available memory before ENOSPC.  Set minimum 1GB

+#               for nodes to avoid (LP: #1311987) and ensure consistency across

+#               older and newer kernels.

+IRONIC_VM_SPECS_RAM=${IRONIC_VM_SPECS_RAM:-1024}

 IRONIC_VM_SPECS_DISK=${IRONIC_VM_SPECS_DISK:-10}

 IRONIC_VM_EMULATOR=${IRONIC_VM_EMULATOR:-/usr/bin/qemu-system-x86_64}

 IRONIC_VM_NETWORK_BRIDGE=${IRONIC_VM_NETWORK_BRIDGE:-brbm}