Added support for storpool_qos service

Author: slavkap

engine/api/src/main/java/org/apache/cloudstack/engine/subsystem/api/storage/PrimaryDataStoreDriver.java

@@ -22,6 +22,7 @@
 import org.apache.cloudstack.storage.command.CommandResult;
 
 import com.cloud.host.Host;
+import com.cloud.offering.DiskOffering;
 import com.cloud.storage.StoragePool;
 import com.cloud.storage.Volume;
 import com.cloud.storage.Storage.StoragePoolType;
@@ -173,4 +174,9 @@ default boolean zoneWideVolumesAvailableWithoutClusterMotion() {
     default long getVolumeSizeRequiredOnPool(long volumeSize, Long templateSize, boolean isEncryptionRequired) {
         return volumeSize;
     }
+    default boolean informStorageForDiskOfferingChange() {
+        return false;
+    }
+
+    default void updateStorageWithTheNewDiskOffering(Volume volume, DiskOffering newDiskOffering) {}
 }

plugins/storage/volume/storpool/README.md

@@ -345,6 +345,46 @@ corresponding system disk offering.
 
 CloudStack has no way to specify max BW. Do they want to be able to specify max BW only is sufficient.
 
+================================================================================
+
+StorPool provides the ‘storpool_qos’ service ([QoS user guide](https://kb.storpool.com/storpool_misc/qos.html#storpool-qos-user-guide)) that tracks and configures the storage tier for all volumes based on a specifically provided `qc` tag specifying the storage tier for each volume.
+
+To manage the QoS limits with a `qc` tag, you have to add a `qc` tag resource detail to each disk offering to which a tier should be applied, with a key `SP_QOSCLASS` and the value from the configuration file for the `storpool_qos` service:
+
+	add resourcedetail resourceid={diskofferingid} details[0].key=SP_QOSCLASS details[0].value={the name of the tier from the config} resourcetype=DiskOffering
+
+To change the tier via CloudStack, you can use the CloudStack API call `changeOfferingForVolume`. The size is required, but the user could use the current volume size. Example:
+
+	change offeringforvolume id={The UUID of the Volume} diskofferingid={The UUID of the disk offering} size={The current or a new size for the volume}
+
+Users who were using the offerings to change the StorPool template via the `SP_TEMPLATE` detail, will continue to have this functionality but should use `changeOfferingForVolume` API call instead of:
+ - `resizeVolume` API call for DATA disk
+ - `scaleVirtualMachine` API call for ROOT disk
+
+
+If the disk offering has both `SP_TEMPLATE` and `SP_QOSCLASS` defined, the `SP_QOSCLASS` detail will be prioritised, setting the volume’s QoS using the respective ‘qc’ tag value. In case the QoS for a volume is changed manually, the ‘storpool_qos’ service will automatically reset the QoS limits following the ‘qc’ tag value once per minute.
+
+<h4>Usage</h4>
+
+Creating Disk Offering for each tier.
+
+Go to Service Offerings > Disk Offering > Add disk offering.
+
+Add disk offering detail with API call in CloudStack CLI.
+
+	add resourcedetail resourcetype=diskoffering resourceid=$UUID details[0].key=SP_QOSCLASS details[0].value=$Tier Name
+
+
+Creating VM with QoS
+
+Deploy virtual machine: Go to Compute> Instances> Add Instances.
+ - For the ROOT volume, choose the option `Override disk offering`. This will set the required `qc` tag from the disk offering (DO) detail.
+
+Creating DATA disk with QoS
+ - Create volume via GUI/CLI and choose a disk offering which has the required `SP_QOSCLASS` detail
+
+To update the tier of a ROOT/DATA volume go to Storage> Volumes and select the Volume and click on the Change disk offering for the volume in the upper right corner.
+
 ## Supported operations for Volume encryption
 
 Supported Virtual machine operations - live migration of VM to another host, virtual machine snapshots (group snapshot without memory), revert VM snapshot, delete VM snapshot

plugins/storage/volume/storpool/src/main/java/org/apache/cloudstack/storage/datastore/api/StorPoolVolume.java

@@ -0,0 +1,92 @@
+package org.apache.cloudstack.storage.datastore.api;
+
+import java.io.Serializable;
+import java.util.Map;
+
+public class StorPoolVolume implements Serializable {
+
+    private static final long serialVersionUID = 1L;
+    private transient String name;
+    private Long size;
+    private Map<String, String> tags;
+    private String parent;
+    private Long iops;
+    private String template;
+    private String baseOn;
+    private String rename;
+    private Boolean shrinkOk;
+
+    public StorPoolVolume() {
+    }
+
+    public StorPoolVolume(String name, Long size, Map<String, String> tags, String parent, Long iops, String template,
+            String baseOn, String rename, Boolean shrinkOk) {
+        super();
+        this.name = name;
+        this.size = size;
+        this.tags = tags;
+        this.parent = parent;
+        this.iops = iops;
+        this.template = template;
+        this.baseOn = baseOn;
+        this.rename = rename;
+        this.shrinkOk = shrinkOk;
+    }
+
+    public String getName() {
+        return name;
+    }
+    public void setName(String name) {
+        this.name = name;
+    }
+    public Long getSize() {
+        return size;
+    }
+    public void setSize(Long size) {
+        this.size = size;
+    }
+    public Map<String, String> getTags() {
+        return tags;
+    }
+    public void setTags(Map<String, String> tags) {
+        this.tags = tags;
+    }
+    public String getParent() {
+        return parent;
+    }
+    public void setParent(String parent) {
+        this.parent = parent;
+    }
+    public Long getIops() {
+        return iops;
+    }
+    public void setIops(Long iops) {
+        this.iops = iops;
+    }
+    public String getTemplate() {
+        return template;
+    }
+    public void setTemplate(String template) {
+        this.template = template;
+    }
+    public String getBaseOn() {
+        return baseOn;
+    }
+    public void setBaseOn(String baseOn) {
+        this.baseOn = baseOn;
+    }
+    public String getRename() {
+        return rename;
+    }
+    public void setRename(String rename) {
+        this.rename = rename;
+    }
+
+    public Boolean getShrinkOk() {
+        return shrinkOk;
+    }
+
+    public void setShrinkOk(Boolean shrinkOk) {
+        this.shrinkOk = shrinkOk;
+    }
+}