CPERF: Fixes issue with known hosts

Exporting the global var to disable ansible host key checking doesn't
ignore known hosts in the file. To fix this, this patch sets the known
hosts file to /dev/null.

Reference: https://github.com/ansible/ansible/issues/9442

Jobs currently failing due to known hosts:
https://build.opnfv.org/ci/job/cperf-apex-csit-master/320/console

Change-Id: Ic3470b368a056b3a3981f9555160a44018f97ebd
Signed-off-by: Tim Rozet <trozet@redhat.com>

diff --git a/jjb/cperf/cperf-robot-netvirt-csit.sh b/jjb/cperf/cperf-robot-netvirt-csit.sh
index 892f0aa..fe5d578 100755 (executable)
--- a/jjb/cperf/cperf-robot-netvirt-csit.sh
+++ b/jjb/cperf/cperf-robot-netvirt-csit.sh
@@ -90,7 +90,7 @@ fi
 # Upload glance image into openstack
 wget -O ${WORKSPACE}/cirros-0.3.5-x86_64-disk.img http://download.cirros-cloud.net/0.3.5/cirros-0.3.5-x86_64-disk.img
 export ANSIBLE_HOST_KEY_CHECKING=False
-ansible-playbook -i ${CONTROLLER_1_IP}, -u heat-admin --key-file ${WORKSPACE}/id_rsa ${REL_PATH}/cirros-upload.yaml.ansible -vvv
+ansible-playbook -i ${CONTROLLER_1_IP}, -u heat-admin --key-file ${WORKSPACE}/id_rsa ${REL_PATH}/cirros-upload.yaml.ansible --ssh-extra-args='-o StrictHostKeyChecking=no  -o UserKnownHostsFile=/dev/null' -vvv
 
 LOGS_LOCATION=/tmp/robot_results
 
@@ -185,4 +185,4 @@ docker run -i --net=host \
   ${robot_cmd} ${suites};"
 
 echo "Running post CSIT clean"
-ansible-playbook -i ${CONTROLLER_1_IP}, -u heat-admin --key-file ${WORKSPACE}/id_rsa ${REL_PATH}/csit-clean.yaml.ansible -vvv
+ansible-playbook -i ${CONTROLLER_1_IP}, -u heat-admin --key-file ${WORKSPACE}/id_rsa ${REL_PATH}/csit-clean.yaml.ansible --ssh-extra-args='-o StrictHostKeyChecking=no  -o UserKnownHostsFile=/dev/null' -vvv