Recently, the gate jobs took too long to complete (between 2 to 8
hours). The reason is jenkins slave agent die during the test, which
cause the CI to re-start the whole test in a new VM.
The failure mainly occurred at magnum-api pipeline, but also occurred
at other pipelines. In term of distribution of test nodes, this
failure mainly occurred at OVH nodes, in which there is no dedicated
swap device. As a result, at OVH nodes, local disk is used for swap
when memory is over-consuming. It looks this leads to resource
starvation, which cause the failure.
This patch attempted to reduce the memory consumption of the gate
tests. In the api test, the number of worker nodes was reduced from
2 to 1. In all tests (api/k8s/swarm/mesos), the memory of worker node
was reduced from 1G to 512M.
Closes-Bug: #1542386
Change-Id: If7822d07f95ebc935a8763b92f038f10cf07b5ca
dca02f1d98