api: listVM API improvement followup, change returning of stats detail (#9177)

- Changes behaviour of details param handling via global setting:
  - listVirtualMachines API: when the details param is not provided, it returns whether stats are returned controlled by a new global setting `list.vm.default.details.stats`
  - listVirtualMachinesMetrics API: when the details param is not provided, it uses `all` details including `stats`
- Users who are affected slow performance of the listVirtualMachines API response time can set `list.vm.default.details.stats` to `false`
- Remove ConfigKey vm.stats.increment.metrics.in.memory which was renamed to `vm.stats.increment.metrics` in #5984 and also remove unused/unnecessary global settings via upgrade path
- Changes default value of VM stats accumulation setting `vm.stats.increment.metrics` to false until a better solution emerges. Since #5984, this is true and during the execution of listVM APIs the stats are clubbed/calculated which can immensely slow down list VM API calls. Any costly operations such as summing of stats shouldn't be done during the course of a synchronous API, such as the list VM API.
- Fix UI that uses listVirtualMachinesMetrics to not call `stats` detail when in list view without metrics selected.

Signed-off-by: Rohit Yadav <rohit.yadav@shapeblue.com>

api/src/main/java/org/apache/cloudstack/api/command/user/vm/ListVMsCmd.java

@@ -99,8 +99,8 @@ public class ListVMsCmd extends BaseListRetrieveOnlyResourceCountCmd implements
                collectionType = CommandType.STRING,
                description = "comma separated list of vm details requested, "
                    + "value can be a list of [all, group, nics, stats, secgrp, tmpl, servoff, diskoff, backoff, iso, volume, min, affgrp]."
-                   + " If no parameter is passed in, the details will be defaulted to all. When return.vm.stats.on.vm.list is true, the default" +
-                       "details change to [group, nics, secgrp, tmpl, servoff, diskoff, backoff, iso, volume, min, affgrp], thus the stats will not be returned. ")
+                   + " When no parameters are passed, all the details are returned if list.vm.default.details.stats is true (default),"
+                   + " otherwise when list.vm.default.details.stats is false the API response will exclude the stats details.")
     private List<String> viewDetails;
 
     @Parameter(name = ApiConstants.TEMPLATE_ID, type = CommandType.UUID, entityType = TemplateResponse.class, description = "list vms by template")

api/src/main/java/org/apache/cloudstack/query/QueryService.java

@@ -125,9 +125,8 @@ public interface QueryService {
     static final ConfigKey<Boolean> SharePublicTemplatesWithOtherDomains = new ConfigKey<>("Advanced", Boolean.class, "share.public.templates.with.other.domains", "true",
             "If false, templates of this domain will not show up in the list templates of other domains.", true, ConfigKey.Scope.Domain);
 
-    ConfigKey<Boolean> ReturnVmStatsOnVmList = new ConfigKey<>("Advanced", Boolean.class, "return.vm.stats.on.vm.list", "true",
-            "If false, changes the listVirtualMachines default details to [group, nics, secgrp, tmpl, servoff, diskoff, backoff, iso, volume, min, affgrp], so that the VMs' stats" +
-                    " are not returned by default when listing VMs; only when the 'stats' or 'all' detail is informed.", true, ConfigKey.Scope.Global);
+    ConfigKey<Boolean> ReturnVmStatsOnVmList = new ConfigKey<>("Advanced", Boolean.class, "list.vm.default.details.stats", "true",
+            "Determines whether VM stats should be returned when details are not explicitly specified in listVirtualMachines API request. When false, details default to [group, nics, secgrp, tmpl, servoff, diskoff, backoff, iso, volume, min, affgrp]. When true, all details are returned including 'stats'.", true, ConfigKey.Scope.Global);
 
     ListResponse<UserResponse> searchForUsers(ListUsersCmd cmd) throws PermissionDeniedException;
 

engine/schema/src/main/resources/META-INF/db/schema-41900to41910-cleanup.sql

@@ -18,3 +18,7 @@
 --;
 -- Schema upgrade cleanup from 4.19.0.0 to 4.19.1.0
 --;
+
+-- List VMs response optimisation, don't sum during API handling
+UPDATE cloud.configuration set value='false' where name='vm.stats.increment.metrics';
+DELETE from cloud.configuration where name='vm.stats.increment.metrics.in.memory';

server/src/main/java/com/cloud/server/StatsCollector.java

@@ -278,12 +278,9 @@ public class StatsCollector extends ManagerBase implements ComponentMethodInterc
     private static final ConfigKey<String> statsOutputUri = new ConfigKey<>("Advanced", String.class, "stats.output.uri", "",
             "URI to send StatsCollector statistics to. The collector is defined on the URI scheme. Example: graphite://graphite-hostaddress:port or influxdb://influxdb-hostaddress/dbname. Note that the port is optional, if not added the default port for the respective collector (graphite or influxdb) will be used. Additionally, the database name '/dbname' is  also optional; default db name is 'cloudstack'. You must create and configure the database if using influxdb.",
             true);
-    protected static ConfigKey<Boolean> vmStatsIncrementMetrics = new ConfigKey<>("Advanced", Boolean.class, "vm.stats.increment.metrics", "true",
+    protected static ConfigKey<Boolean> vmStatsIncrementMetrics = new ConfigKey<>("Advanced", Boolean.class, "vm.stats.increment.metrics", "false",
             "When set to 'true', VM metrics(NetworkReadKBs, NetworkWriteKBs, DiskWriteKBs, DiskReadKBs, DiskReadIOs and DiskWriteIOs) that are collected from the hypervisor are summed before being returned."
                     + "On the other hand, when set to 'false', the VM metrics API will just display the latest metrics collected.", true);
-    private static final ConfigKey<Boolean> VM_STATS_INCREMENT_METRICS_IN_MEMORY = new ConfigKey<>("Advanced", Boolean.class, "vm.stats.increment.metrics.in.memory", "true",
-            "When set to 'true', VM metrics(NetworkReadKBs, NetworkWriteKBs, DiskWriteKBs, DiskReadKBs, DiskReadIOs and DiskWriteIOs) that are collected from the hypervisor are summed and stored in memory. "
-            + "On the other hand, when set to 'false', the VM metrics API will just display the latest metrics collected.", true);
     protected static ConfigKey<Integer> vmStatsMaxRetentionTime = new ConfigKey<>("Advanced", Integer.class, "vm.stats.max.retention.time", "720",
             "The maximum time (in minutes) for keeping VM stats records in the database. The VM stats cleanup process will be disabled if this is set to 0 or less than 0.", true);
 
@@ -2131,7 +2128,6 @@ public class StatsCollector extends ManagerBase implements ComponentMethodInterc
     public ConfigKey<?>[] getConfigKeys() {
         return new ConfigKey<?>[] {vmDiskStatsInterval, vmDiskStatsIntervalMin, vmNetworkStatsInterval, vmNetworkStatsIntervalMin, StatsTimeout, statsOutputUri,
             vmStatsIncrementMetrics, vmStatsMaxRetentionTime, vmStatsCollectUserVMOnly, vmDiskStatsRetentionEnabled, vmDiskStatsMaxRetentionTime,
-                VM_STATS_INCREMENT_METRICS_IN_MEMORY,
                 MANAGEMENT_SERVER_STATUS_COLLECTION_INTERVAL,
                 DATABASE_SERVER_STATUS_COLLECTION_INTERVAL,
                 DATABASE_SERVER_LOAD_HISTORY_RETENTION_NUMBER};

ui/src/config/section/compute.js

@@ -32,9 +32,9 @@ export default {
       getApiToCall: () => store.getters.metrics ? 'listVirtualMachinesMetrics' : 'listVirtualMachines',
       resourceType: 'UserVm',
       params: () => {
-        var params = { details: 'servoff,tmpl,iso,nics,backoff' }
+        var params = { details: 'group,nics,secgrp,tmpl,servoff,diskoff,iso,volume,affgrp' }
         if (store.getters.metrics) {
-          params = { details: 'servoff,tmpl,iso,nics,backoff,stats' }
+          params = { details: 'all,stats' }
         }
         params.isvnf = false
         return params

ui/src/views/AutogenView.vue

@@ -904,6 +904,7 @@ export default {
       if (['listVirtualMachinesMetrics'].includes(this.apiName) && this.dataView) {
         delete params.details
         delete params.isvnf
+        params.details = 'group,nics,secgrp,tmpl,servoff,diskoff,iso,volume,affgrp'
       }
 
       this.loading = true