Set single shard for netvirt 3 node CSIT
[integration/test.git] / csit / libraries / ClusterManagement.robot
index e01f5e5b61cd0f481d45575437d599bd7d1b2f38..b2e0a8736116d78170099c8a4a6fc439a57759af 100644 (file)
@@ -36,6 +36,7 @@ Resource          ${CURDIR}/KarafKeywords.robot
 Resource          ${CURDIR}/SSHKeywords.robot
 Resource          ${CURDIR}/TemplatedRequests.robot    # for Get_As_Json_From_Uri
 Resource          ${CURDIR}/Utils.robot    # for Run_Command_On_Controller
+Resource          ../variables/Variables.robot
 
 *** Variables ***
 ${ENTITY_OWNER_URI}    restconf/operational/entity-owners:entity-owners
@@ -43,23 +44,29 @@ ${GC_LOG_PATH}    ${KARAF_HOME}/data/log
 ${JAVA_HOME}      ${EMPTY}    # releng/builder scripts should provide correct value
 ${JOLOKIA_CONF_SHARD_MANAGER_URI}    jolokia/read/org.opendaylight.controller:Category=ShardManager,name=shard-manager-config,type=DistributedConfigDatastore
 ${JOLOKIA_OPER_SHARD_MANAGER_URI}    jolokia/read/org.opendaylight.controller:Category=ShardManager,name=shard-manager-operational,type=DistributedOperationalDatastore
+${JOLOKIA_CONFIG_LOCAL_SHARDS_URI}    jolokia/read/org.opendaylight.controller:type=DistributedConfigDatastore,Category=ShardManager,name=shard-manager-config/LocalShards
+${JOLOKIA_OPER_LOCAL_SHARDS_URI}    jolokia/read/org.opendaylight.controller:type=DistributedOperationalDatastore,Category=ShardManager,name=shard-manager-operational/LocalShards
 ${JOLOKIA_READ_URI}    jolokia/read/org.opendaylight.controller
-${KARAF_HOME}     ${WORKSPACE}${/}${BUNDLEFOLDER}    # TODO: Migrate to Variables.robot
-@{ODL_DEFAULT_DATA_PATHS}    tmp/    data/    cache/    snapshots/    journal/    etc/opendaylight/current/
+# Bug 9044 workaround: delete etc/host.key before restart.
+@{ODL_DEFAULT_DATA_PATHS}    tmp/    data/    cache/    snapshots/    journal/    etc/opendaylight/current/    etc/host.key
 ${RESTCONF_MODULES_DIR}    ${CURDIR}/../variables/restconf/modules
 ${SINGLETON_NETCONF_DEVICE_ID_PREFIX}    /odl-general-entity:entity[odl-general-entity:name='KeyedInstanceIdentifier{targetType=interface org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.Node, path=[org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.NetworkTopology, org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.Topology[key=TopologyKey [_topologyId=Uri [_value=topology-netconf]]], org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.Node[key=NodeKey [_nodeId=Uri [_value=
 ${SINGLETON_NETCONF_DEVICE_ID_SUFFIX}    ]]]]}']
+${SINGLETON_BGPCEP_DEVICE_ID_PREFIX}    /odl-general-entity:entity[odl-general-entity:name='
+${SINGLETON_BGPCEP_DEVICE_ID_SUFFIX}    -service-group']
 ${SINGLETON_ELECTION_ENTITY_TYPE}    org.opendaylight.mdsal.ServiceEntityType
 ${SINGLETON_CHANGE_OWNERSHIP_ENTITY_TYPE}    org.opendaylight.mdsal.AsyncServiceCloseEntityType
+${NODE_ROLE_INDEX_START}    1
 ${NODE_START_COMMAND}    ${KARAF_HOME}/bin/start
 ${NODE_STOP_COMMAND}    ${KARAF_HOME}/bin/stop
+${NODE_KARAF_COUNT_COMMAND}    ps axf | grep org.apache.karaf | grep -v grep | wc -l
 ${NODE_KILL_COMMAND}    ps axf | grep org.apache.karaf | grep -v grep | awk '{print \"kill -9 \" $1}' | sh
 ${NODE_FREEZE_COMMAND}    ps axf | grep org.apache.karaf | grep -v grep | awk '{print \"kill -STOP \" $1}' | sh
 ${NODE_UNFREEZE_COMMAND}    ps axf | grep org.apache.karaf | grep -v grep | awk '{print \"kill -CONT \" $1}' | sh
 
 *** Keywords ***
 ClusterManagement_Setup
-    [Arguments]    ${http_timeout}=1    ${http_retries}=0
+    [Arguments]    ${http_timeout}=${DEFAULT_TIMEOUT_HTTP}    ${http_retries}=0
     [Documentation]    Detect repeated call, or detect number of members and initialize derived suite variables.
     ...    Http sessions are created with parameters to not waste time when ODL is no accepting connections properly.
     # Avoid multiple initialization by several downstream libraries.
@@ -91,6 +98,19 @@ Get_Sync_Status_Of_Member
     ${oper_status} =    ClusterManagement__Parse_Sync_Status    shard_manager_text=${oper_text}
     [Return]    ${oper_status}
 
+Dump_Local_Shards_For_Each_Member
+    [Arguments]    ${member_index_list}=${EMPTY}
+    [Documentation]    Obtain IP, two GETs from jolokia URIs, return combined local shard list
+    ${index_list} =    List_Indices_Or_All    given_list=${member_index_list}
+    : FOR    ${member_index}    IN    @{index_list}    # usually: 1, 2, 3.
+    \    ${session} =    Resolve_Http_Session_For_Member    member_index=${member_index}
+    \    ${conf_shard_list} =    Wait Until Keyword Succeeds    60    2    TemplatedRequests.Get_As_Json_From_Uri    uri=${JOLOKIA_CONFIG_LOCAL_SHARDS_URI}
+    \    ...    session=${session}
+    \    Log    ${conf_shard_list}
+    \    ${oper_shard_list} =    Wait Until Keyword Succeeds    60    2    TemplatedRequests.Get_As_Json_From_Uri    uri=${JOLOKIA_OPER_LOCAL_SHARDS_URI}
+    \    ...    session=${session}
+    \    Log    ${oper_shard_list}
+
 Verify_Leader_Exists_For_Each_Shard
     [Arguments]    ${shard_name_list}    ${shard_type}=operational    ${member_index_list}=${EMPTY}    ${verify_restconf}=True
     [Documentation]    For each shard name, call Get_Leader_And_Followers_For_Shard.
@@ -99,7 +119,7 @@ Verify_Leader_Exists_For_Each_Shard
     \    Get_Leader_And_Followers_For_Shard    shard_name=${shard_name}    shard_type=${shard_type}    validate=True    member_index_list=${member_index_list}    verify_restconf=${verify_restconf}
 
 Get_Leader_And_Followers_For_Shard
-    [Arguments]    ${shard_name}=default    ${shard_type}=operational    ${validate}=True    ${member_index_list}=${EMPTY}    ${verify_restconf}=True    ${http_timeout}=5
+    [Arguments]    ${shard_name}=default    ${shard_type}=operational    ${validate}=True    ${member_index_list}=${EMPTY}    ${verify_restconf}=True    ${http_timeout}=${EMPTY}
     [Documentation]    Get role lists, validate there is one leader, return the leader and list of followers.
     ...    Optionally, issue GET to a simple restconf URL to make sure subsequent operations will not encounter 503.
     ${leader_list}    ${follower_list} =    Get_State_Info_For_Shard    shard_name=${shard_name}    shard_type=${shard_type}    validate=True    member_index_list=${member_index_list}
@@ -111,7 +131,7 @@ Get_Leader_And_Followers_For_Shard
     [Return]    ${leader}    ${follower_list}
 
 Get_State_Info_For_Shard
-    [Arguments]    ${shard_name}=default    ${shard_type}=operational    ${validate}=False    ${member_index_list}=${EMPTY}    ${verify_restconf}=False    ${http_timeout}=5
+    [Arguments]    ${shard_name}=default    ${shard_type}=operational    ${validate}=False    ${member_index_list}=${EMPTY}    ${verify_restconf}=False    ${http_timeout}=${EMPTY}
     [Documentation]    Return lists of Leader and Follower member indices from a given member index list
     ...    (or from the full list if empty). If \${shard_type} is not 'config', 'operational' is assumed.
     ...    If \${validate}, Fail if raft state is not Leader or Follower (for example on Candidate).
@@ -132,7 +152,7 @@ Get_State_Info_For_Shard
     [Return]    ${leader_list}    ${follower_list}
 
 Get_Raft_State_Of_Shard_At_Member
-    [Arguments]    ${shard_name}    ${shard_type}    ${member_index}    ${verify_restconf}=False    ${http_timeout}=5
+    [Arguments]    ${shard_name}    ${shard_type}    ${member_index}    ${verify_restconf}=False    ${http_timeout}=${EMPTY}
     [Documentation]    Send request to Jolokia on indexed member, return extracted Raft status.
     ...    Optionally, check restconf works.
     ${raft_state} =    Get_Raft_Property_From_Shard_Member    RaftState    ${shard_name}    ${shard_type}    ${member_index}    verify_restconf=${verify_restconf}
@@ -140,14 +160,15 @@ Get_Raft_State_Of_Shard_At_Member
     [Return]    ${raft_state}
 
 Get_Raft_Property_From_Shard_Member
-    [Arguments]    ${property}    ${shard_name}    ${shard_type}    ${member_index}    ${verify_restconf}=False    ${http_timeout}=5
+    [Arguments]    ${property}    ${shard_name}    ${shard_type}    ${member_index}    ${verify_restconf}=False    ${http_timeout}=${EMPTY}
     [Documentation]    Send request to Jolokia on indexed member, return extracted Raft property.
     ...    Optionally, check restconf works.
     ${session} =    Resolve_Http_Session_For_Member    member_index=${member_index}
     # TODO: Does the used URI tend to generate large data which floods log.html?
     BuiltIn.Run_Keyword_If    ${verify_restconf}    TemplatedRequests.Get_As_Json_Templated    session=${session}    folder=${RESTCONF_MODULES_DIR}    verify=False    http_timeout=${http_timeout}
     ${type_class} =    Resolve_Shard_Type_Class    shard_type=${shard_type}
-    ${uri} =    BuiltIn.Set_Variable    ${JOLOKIA_READ_URI}:Category=Shards,name=member-${member_index}-shard-${shard_name}-${shard_type},type=${type_class}
+    ${cluster_index} =    Evaluate    ${member_index}+${NODE_ROLE_INDEX_START}-1
+    ${uri} =    BuiltIn.Set_Variable    ${JOLOKIA_READ_URI}:Category=Shards,name=member-${cluster_index}-shard-${shard_name}-${shard_type},type=${type_class}
     ${data_text} =    TemplatedRequests.Get_As_Json_From_Uri    uri=${uri}    session=${session}    http_timeout=${http_timeout}
     ${data_object} =    RequestsLibrary.To_Json    ${data_text}
     ${value} =    Collections.Get_From_Dictionary    ${data_object}    value
@@ -257,6 +278,21 @@ Get_Owner_And_Candidates_For_Device_Singleton_Netconf
     BuiltIn.Should_Be_Equal_As_Integers    ${owner_1}    ${owner_2}    Owners for device ${device_name} are not same
     [Return]    ${owner_1}    ${candidate_list_1}
 
+Get_Owner_And_Candidates_For_Device_Singleton_Bgpcep
+    [Arguments]    ${device_name}    ${member_index}    ${http_timeout}=${EMPTY}
+    [Documentation]    Returns the owner and a list of candidates for the SB device ${device_name}. Request is sent to member ${member_index}.
+    # Get election entity type results
+    ${type} =    BuiltIn.Set_Variable    ${SINGLETON_ELECTION_ENTITY_TYPE}
+    ${id} =    BuiltIn.Set_Variable    ${SINGLETON_BGPCEP_DEVICE_ID_PREFIX}${device_name}${SINGLETON_BGPCEP_DEVICE_ID_SUFFIX}
+    ${owner_1}    ${candidate_list_1} =    Get_Owner_And_Candidates_For_Type_And_Id    ${type}    ${id}    ${member_index}    http_timeout=${http_timeout}
+    # Get change ownership entity type results
+    ${type} =    BuiltIn.Set_Variable    ${SINGLETON_CHANGE_OWNERSHIP_ENTITY_TYPE}
+    ${id} =    BuiltIn.Set_Variable    ${SINGLETON_BGPCEP_DEVICE_ID_PREFIX}${device_name}${SINGLETON_BGPCEP_DEVICE_ID_SUFFIX}
+    ${owner_2}    ${candidate_list_2} =    Get_Owner_And_Candidates_For_Type_And_Id    ${type}    ${id}    ${member_index}    http_timeout=${http_timeout}
+    # Owners must be same, if not, there is still some election or change ownership in progress
+    BuiltIn.Should_Be_Equal_As_Integers    ${owner_1}    ${owner_2}    Owners for device ${device_name} are not same
+    [Return]    ${owner_1}    ${candidate_list_1}
+
 Get_Owner_And_Candidates_For_Device
     [Arguments]    ${device_name}    ${device_type}    ${member_index}    ${http_timeout}=${EMPTY}
     [Documentation]    Returns the owner and a list of candidates for the SB device ${device_name} of type ${device_type}. Request is sent to member ${member_index}.
@@ -355,6 +391,8 @@ Kill_Single_Member
     [Documentation]    Convenience keyword that kills the specified member of the cluster.
     ...    The KW will return a list of available members: \${updated index_list}=\${original_index_list}-\${member}
     ${index_list} =    ClusterManagement__Build_List    ${member}
+    ${member_ip} =    Return_Member_IP    ${member}
+    KarafKeywords.Log_Message_To_Controller_Karaf    Killing ODL${member} ${member_ip}
     ${updated_index_list} =    Kill_Members_From_List_Or_All    ${index_list}    ${original_index_list}    ${confirm}
     [Return]    ${updated_index_list}
 
@@ -373,6 +411,7 @@ Kill_Members_From_List_Or_All
     BuiltIn.Sleep    1s    Kill -9 closes open files, which may take longer than ssh overhead, but not long enough to warrant WUKS.
     : FOR    ${index}    IN    @{kill_index_list}
     \    Verify_Karaf_Is_Not_Running_On_Member    member_index=${index}
+    Run_Bash_Command_On_List_Or_All    command=netstat -pnatu | grep 2550
     [Return]    ${updated_index_list}
 
 Stop_Single_Member
@@ -396,6 +435,7 @@ Stop_Members_From_List_Or_All
     BuiltIn.Return_From_Keyword_If    not ${confirm}    ${updated_index_list}
     : FOR    ${index}    IN    @{stop_index_list}
     \    BuiltIn.Wait Until Keyword Succeeds    ${timeout}    2s    Verify_Karaf_Is_Not_Running_On_Member    member_index=${index}
+    Run_Bash_Command_On_List_Or_All    command=netstat -pnatu | grep 2550
     [Return]    ${updated_index_list}
 
 Start_Single_Member
@@ -414,11 +454,12 @@ Start_Members_From_List_Or_All
     ${command} =    BuiltIn.Set_Variable_If    """${export_java_home}""" != ""    export JAVA_HOME="${export_java_home}"; ${base_command}    ${base_command}
     ${epoch} =    DateTime.Get_Current_Date    time_zone=UTC    result_format=epoch    exclude_millis=False
     ${gc_filepath} =    BuiltIn.Set_Variable_If    """${karaf_home}""" != ""    ${karaf_home}/data/log/gc_${epoch}.log    ${GC_LOG_PATH}/gc_${epoch}.log
-    ${gc_options} =    BuiltIn.Set_Variable    -XX:+PrintGCDetails -XX:+PrintGCDateStamps -Xloggc:${gc_filepath}
+    ${gc_options} =    BuiltIn.Set_Variable_If    "docker" not in """${node_start_command}"""    -XX:+PrintGCDetails -XX:+PrintGCDateStamps -Xloggc:${gc_filepath}    ${EMPTY}
     Run_Bash_Command_On_List_Or_All    command=${command} ${gc_options}    member_index_list=${member_index_list}
     BuiltIn.Return_From_Keyword_If    not ${wait_for_sync}
     BuiltIn.Wait_Until_Keyword_Succeeds    ${timeout}    10s    Check_Cluster_Is_In_Sync    member_index_list=${member_index_list}
     # TODO: Do we also want to check Shard Leaders here?
+    [Teardown]    Run_Bash_Command_On_List_Or_All    command=netstat -pnatu | grep 2550
 
 Freeze_Single_Member
     [Arguments]    ${member}
@@ -440,13 +481,13 @@ Freeze_Or_Unfreeze_Members_From_List_Or_All
     ${freeze_index_list} =    List_Indices_Or_All    given_list=${member_index_list}
     Run_Bash_Command_On_List_Or_All    command=${command}    member_index_list=${member_index_list}
 
-Clean_Journals_And_Snapshots_On_List_Or_All
+Clean_Journals_Data_And_Snapshots_On_List_Or_All
     [Arguments]    ${member_index_list}=${EMPTY}    ${karaf_home}=${KARAF_HOME}
     [Documentation]    Delete journal and snapshots directories on every node listed (or all).
     ...    BEWARE: If only a subset of members is cleaned, this causes RetiredGenerationException in Carbon after the affected node re-start.
     ...    See https://bugs.opendaylight.org/show_bug.cgi?id=8138
     ${index_list} =    List_Indices_Or_All    given_list=${member_index_list}
-    ${command} =    Set Variable    rm -rf "${karaf_home}/journal" "${karaf_home}/snapshots"
+    ${command} =    Set Variable    rm -rf "${karaf_home}/journal" "${karaf_home}/snapshots" "${karaf_home}/data"
     : FOR    ${index}    IN    @{index_list}    # usually: 1, 2, 3.
     \    Run_Bash_Command_On_Member    command=${command}    member_index=${index}
 
@@ -465,19 +506,20 @@ Verify_Single_Karaf_Is_Running_On_Member
 Count_Running_Karafs_On_Member
     [Arguments]    ${member_index}
     [Documentation]    Remotely execute grep for karaf process, return count as string.
-    ${command} =    BuiltIn.Set_Variable    ps axf | grep org.apache.karaf | grep -v grep | wc -l
+    ${command} =    BuiltIn.Set_Variable    ${NODE_KARAF_COUNT_COMMAND}
     ${count} =    Run_Bash_Command_On_Member    command=${command}    member_index=${member_index}
     [Return]    ${count}
 
 Isolate_Member_From_List_Or_All
-    [Arguments]    ${isolate_member_index}    ${member_index_list}=${EMPTY}
+    [Arguments]    ${isolate_member_index}    ${member_index_list}=${EMPTY}    ${protocol}=all    ${port}=${EMPTY}
     [Documentation]    If the list is empty, isolate member from all ODL instances. Otherwise, isolate member based on present indices.
     ...    The KW will return a list of available members: \${updated index_list}=\${member_index_list}-\${isolate_member_index}
     ${index_list} =    List_Indices_Or_All    given_list=${member_index_list}
     ${source} =    Collections.Get_From_Dictionary    ${ClusterManagement__index_to_ip_mapping}    ${isolate_member_index}
+    ${dport} =    BuiltIn.Set_Variable_If    '${port}' != '${EMPTY}'    --dport ${port}    ${EMPTY}
     : FOR    ${index}    IN    @{index_list}
     \    ${destination} =    Collections.Get_From_Dictionary    ${ClusterManagement__index_to_ip_mapping}    ${index}
-    \    ${command} =    BuiltIn.Set_Variable    sudo /sbin/iptables -I OUTPUT -p all --source ${source} --destination ${destination} -j DROP
+    \    ${command} =    BuiltIn.Set_Variable    sudo /sbin/iptables -I OUTPUT -p ${protocol} ${dport} --source ${source} --destination ${destination} -j DROP
     \    BuiltIn.Run_Keyword_If    "${index}" != "${isolate_member_index}"    Run_Bash_Command_On_Member    command=${command}    member_index=${isolate_member_index}
     ${command} =    BuiltIn.Set_Variable    sudo /sbin/iptables -L -n
     ${output} =    Run_Bash_Command_On_Member    command=${command}    member_index=${isolate_member_index}
@@ -487,17 +529,19 @@ Isolate_Member_From_List_Or_All
     [Return]    ${updated_index_list}
 
 Rejoin_Member_From_List_Or_All
-    [Arguments]    ${rejoin_member_index}    ${member_index_list}=${EMPTY}
+    [Arguments]    ${rejoin_member_index}    ${member_index_list}=${EMPTY}    ${protocol}=all    ${port}=${EMPTY}    ${timeout}=60s
     [Documentation]    If the list is empty, rejoin member from all ODL instances. Otherwise, rejoin member based on present indices.
     ${index_list} =    List_Indices_Or_All    given_list=${member_index_list}
     ${source} =    Collections.Get_From_Dictionary    ${ClusterManagement__index_to_ip_mapping}    ${rejoin_member_index}
+    ${dport} =    BuiltIn.Set_Variable_If    '${port}' != '${EMPTY}'    --dport ${port}    ${EMPTY}
     : FOR    ${index}    IN    @{index_list}
     \    ${destination} =    Collections.Get_From_Dictionary    ${ClusterManagement__index_to_ip_mapping}    ${index}
-    \    ${command} =    BuiltIn.Set_Variable    sudo /sbin/iptables -D OUTPUT -p all --source ${source} --destination ${destination} -j DROP
+    \    ${command} =    BuiltIn.Set_Variable    sudo /sbin/iptables -D OUTPUT -p ${protocol} ${dport} --source ${source} --destination ${destination} -j DROP
     \    BuiltIn.Run_Keyword_If    "${index}" != "${rejoin_member_index}"    Run_Bash_Command_On_Member    command=${command}    member_index=${rejoin_member_index}
     ${command} =    BuiltIn.Set_Variable    sudo /sbin/iptables -L -n
     ${output} =    Run_Bash_Command_On_Member    command=${command}    member_index=${rejoin_member_index}
     BuiltIn.Log    ${output}
+    BuiltIn.Wait_Until_Keyword_Succeeds    ${timeout}    10s    Check_Cluster_Is_In_Sync
 
 Flush_Iptables_From_List_Or_All
     [Arguments]    ${member_index_list}=${EMPTY}
@@ -540,6 +584,7 @@ Run_Bash_Command_On_Member
     # TODO: Migrate callers to Check_Bash_Command_*
     ${member_ip} =    Collections.Get_From_Dictionary    dictionary=${ClusterManagement__index_to_ip_mapping}    key=${member_index}
     ${output} =    SSHKeywords.Run_Keyword_Preserve_Connection    Utils.Run_Command_On_Controller    ${member_ip}    ${command}
+    Log    ${output}
     [Return]    ${output}
 
 Run_Karaf_Command_On_List_Or_All
@@ -758,7 +803,7 @@ List_Indices_Minus_Member
     [Return]    ${index_list}
 
 ClusterManagement__Compute_Derived_Variables
-    [Arguments]    ${int_of_members}    ${http_timeout}=1    ${http_retries}=0
+    [Arguments]    ${int_of_members}    ${http_timeout}=${DEFAULT_TIMEOUT_HTTP}    ${http_retries}=0
     [Documentation]    Construct index list, session list and IP mapping, publish them as suite variables.
     @{member_index_list} =    BuiltIn.Create_List
     @{session_list} =    BuiltIn.Create_List
@@ -771,7 +816,7 @@ ClusterManagement__Compute_Derived_Variables
     BuiltIn.Set_Suite_Variable    \${ClusterManagement__session_list}    ${session_list}
 
 ClusterManagement__Include_Member_Index
-    [Arguments]    ${index}    ${member_index_list}    ${session_list}    ${index_to_ip_mapping}    ${http_timeout}=1    ${http_retries}=0
+    [Arguments]    ${index}    ${member_index_list}    ${session_list}    ${index_to_ip_mapping}    ${http_timeout}=${DEFAULT_TIMEOUT_HTTP}    ${http_retries}=0
     [Documentation]    Add a corresponding item based on index into the last three arguments.
     ...    Create the Http session whose alias is added to list.
     Collections.Append_To_List    ${member_index_list}    ${index}
@@ -794,3 +839,10 @@ Sync_Status_Should_Be_True
     [Documentation]    Verify that cluster node is in sync with others
     ${status}    Get_Sync_Status_Of_Member    ${controller_index}
     BuiltIn.Should_Be_True    ${status}
+
+Return_Member_IP
+    [Arguments]    ${member_index}
+    [Documentation]    Return the IP address of the member given the member_index.
+    ${member_int} =    BuiltIn.Convert_To_Integer    ${member_index}
+    ${member_ip} =    Collections.Get_From_Dictionary    dictionary=${ClusterManagement__index_to_ip_mapping}    key=${member_int}
+    [Return]    ${member_ip}