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#Copyright 2017-present Open Networking Foundation
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
*** Settings ***
Documentation Provide the function to perform system related test
Library OperatingSystem
Resource ../../libraries/k8s.robot
*** Variables ***
${timeout} 120s
${desired_ETCD_cluster_size} 3
${minimal_ETCD_cluster_size} 2
${namespace} voltha
${ETCD_resources} etcdclusters.etcd.database.coreos.com
${ETCD_name} voltha-etcd-cluster
${ETCD_pod_label_key} etcd_cluster
${common_pod_label_key} app
${rwcore_pod_label_value} rw-core
${ofagent_pod_label_value} ofagent
${adapter_openolt_pod_label_value} adapter-open-olt
*** Test Cases ***
Scale Down ETCD Cluster
[Documentation] Scale Down the ETCD cluster to minimal size, skip test if current cluster size < 3
[Tags] scaledown ETCDdown
${current_size}= Get ETCD Running Size voltha
Pass Execution If '${current_size}' != '${desired_ETCD_cluster_size}'
... 'Skip the test if the cluster size smaller than minimal size 3'
# The minimal cluster size after scale down
# based on https://github.com/ETCD-io/ETCD/blob/master/Documentation/faq.md#what-is-failure-tolerance
Scale ETCD ${namespace} ${minimal_ETCD_cluster_size}
Wait Until Keyword Succeeds ${timeout} 2s
... Validate ETCD Size ${namespace} ${minimal_ETCD_cluster_size}
Wait Until Keyword Succeeds ${timeout} 2s
... Check Expected Running Pods Number By Label ${namespace}
... ${ETCD_pod_label_key} ${ETCD_name} 2
Scale Up ETCD Cluster
[Documentation] Recover the ETCD cluster by scaling up its size
[Tags] scaleup ETCDup
${current_size}= Get ETCD Running Size voltha
Pass Execution If '${current_size}' != '${minimal_ETCD_cluster_size}'
... 'Skip the test if the cluster size smaller than minimal size 3'
Scale ETCD ${namespace} ${desired_ETCD_cluster_size}
# We scale up the size to 3, the recommended size of ETCD cluster.
Wait Until Keyword Succeeds ${timeout} 2s
... Validate ETCD Size ${namespace} ${desired_ETCD_cluster_size}
ETCD Failure Test
[Documentation] Failure Scenario Test: ETCD Crash
[Tags] FailureTest
Delete K8s Pods By Label ${namespace} ${ETCD_pod_label_key} ${ETCD_name}
Wait Until Keyword Succeeds ${timeout} 2s
... Pods Do Not Exist By Label ${namespace} ${ETCD_pod_label_key} ${ETCD_name}
Wait Until Keyword Succeeds ${timeout} 2s
... Pods Are Ready By Label ${namespace} ${common_pod_label_key} ${rwcore_pod_label_value}
Wait Until Keyword Succeeds ${timeout} 2s
... Pods Are Ready By Label ${namespace} ${common_pod_label_key} ${ofagent_pod_label_value}
Wait Until Keyword Succeeds ${timeout} 2s
... Pods Are Ready By Label ${namespace} ${common_pod_label_key} ${adapter_openolt_pod_label_value}
*** Keywords ***
Get ETCD Running Size
[Arguments] ${namespace}
[Documentation] Get the number of running ETCD nodes
${rc} ${size}= Run and Return Rc and Output
... kubectl -n ${namespace} get ${ETCD_resources} ${ETCD_name} -o jsonpath='{.status.size}'
Should Be Equal As Integers ${rc} 0
[Return] ${size}
Scale ETCD
[Arguments] ${namespace} ${size}
[Documentation] Scale down the number of ETCD pod
${rc}= Run and Return Rc
... kubectl -n ${namespace} patch ${ETCD_resources} ${ETCD_name} --type='merge' -p '{"spec":{"size":${size}}}'
Should Be Equal As Integers ${rc} 0
Validate ETCD Size
[Arguments] ${namespace} ${ETCD_cluster_size}
[Documentation] Scale down the number of ETCD pod
${rc} ${size}= Run and Return Rc and Output
... kubectl -n ${namespace} get ${ETCD_resources} ${ETCD_name} -o jsonpath='{.status.size}'
Should Be Equal As Integers ${size} ${ETCD_cluster_size}