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https://github.com/OpenNebula/one.git
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442 lines
12 KiB
C++
442 lines
12 KiB
C++
/* ------------------------------------------------------------------------ */
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/* Copyright 2002-2021, OpenNebula Project, OpenNebula Systems */
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/* */
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/* Licensed under the Apache License, Version 2.0 (the "License"); you may */
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/* not use this file except in compliance with the License. You may obtain */
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/* a copy of the License at */
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/* */
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/* http://www.apache.org/licenses/LICENSE-2.0 */
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/* */
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/* Unless required by applicable law or agreed to in writing, software */
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/* distributed under the License is distributed on an "AS IS" BASIS, */
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/* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. */
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/* See the License for the specific language governing permissions and */
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/* limitations under the License. */
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/* -------------------------------------------------------------------------*/
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#ifndef DATASTORE_H_
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#define DATASTORE_H_
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#include "PoolObjectSQL.h"
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#include "ObjectCollection.h"
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#include "DatastoreTemplate.h"
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#include "Clusterable.h"
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#include "Image.h"
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class VirtualMachineDisk;
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/**
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* The Datastore class.
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*/
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class Datastore : public PoolObjectSQL, public Clusterable
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{
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public:
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/**
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* Type of Datastore
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*/
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enum DatastoreType
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{
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IMAGE_DS = 0, /** < Standard datastore for disk images */
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SYSTEM_DS = 1, /** < System datastore for disks of running VMs */
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FILE_DS = 2 /** < File datastore for context, kernel, initrd files */
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};
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/**
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* Return the string representation of a DatastoreType
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* @param ob the type
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* @return the string
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*/
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static std::string type_to_str(DatastoreType ob)
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{
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switch (ob)
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{
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case IMAGE_DS: return "IMAGE_DS" ; break;
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case SYSTEM_DS: return "SYSTEM_DS" ; break;
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case FILE_DS: return "FILE_DS" ; break;
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default: return "";
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}
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};
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/**
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* Return the string representation of a DatastoreType
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* @param str_type string representing the DatastoreTypr
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* @return the DatastoreType (defaults to IMAGE_DS)
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*/
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static DatastoreType str_to_type(std::string& str_type);
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/**
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* Datastore State
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*/
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enum DatastoreState
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{
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READY = 0, /** < Datastore ready to use */
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DISABLED = 1 /** < System Datastore can not be used */
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};
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/**
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* Returns the string representation of a DatastoreState
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* @param state The state
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* @return the string representation
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*/
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static std::string state_to_str(DatastoreState state)
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{
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switch (state)
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{
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case READY: return "READY"; break;
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case DISABLED: return "DISABLED"; break;
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default: return "";
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}
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};
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virtual ~Datastore() = default;
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/**
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* Function to print the Datastore object into a string in XML format
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* @param xml the resulting XML string
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* @return a reference to the generated string
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*/
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std::string& to_xml(std::string& xml) const override;
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/**
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* Rebuilds the object from an xml formatted string
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* @param xml_str The xml-formatted string
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*
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* @return 0 on success, -1 otherwise
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*/
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int from_xml(const std::string &xml_str) override;
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/**
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* Adds this image's ID to the set.
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* @param id of the image to be added to the Datastore
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* @return 0 on success
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*/
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int add_image(int id)
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{
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return images.add(id);
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};
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/**
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* Deletes this image's ID from the set.
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* @param id of the image to be deleted from the Datastore
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* @return 0 on success
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*/
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int del_image(int id)
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{
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return images.del(id);
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};
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/**
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* Returns a copy of the Image IDs set
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*/
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const std::set<int>& get_image_ids() const
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{
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return images.get_collection();
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}
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/**
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* Returns the number of images
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*/
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int images_size()
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{
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return images.size();
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}
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/**
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* Retrieves TM mad name
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* @return string tm mad name
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*/
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const std::string& get_tm_mad() const
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{
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return tm_mad;
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};
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/**
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* Retrieves DS mad name
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* @return string ds mad name
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*/
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const std::string& get_ds_mad() const
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{
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return ds_mad;
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};
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/**
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* Retrieves the base path
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* @return base path string
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*/
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const std::string& get_base_path() const
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{
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return base_path;
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};
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/**
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* Retrieves the disk type
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* @return disk type
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*/
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Image::DiskType get_disk_type() const
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{
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return disk_type;
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};
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/**
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* Returns the datastore type
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* @return datastore type
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*/
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DatastoreType get_type() const
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{
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return type;
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};
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/**
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* Modifies the given VM disk attribute adding the relevant datastore
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* attributes
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*
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* @param disk
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* @param inherit_attrs Attributes to be inherited from the DS template
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* into the disk
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*/
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void disk_attribute(
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VirtualMachineDisk * disk,
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const std::vector<std::string>& inherit_attrs);
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/**
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* Set monitor information for the Datastore
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* @param total_mb
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* @param free_mb
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* @param used_mb
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*/
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void update_monitor(long long total, long long free, long long used)
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{
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total_mb = total;
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free_mb = free;
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used_mb = used;
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}
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/**
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* Returns the available capacity in the datastore.
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* @params avail the total available size in the datastore (MB)
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* @return true if the datastore is configured to enforce capacity
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* checkings
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*/
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bool get_avail_mb(long long &avail) const;
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/**
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* Returns true if the DS contains the SHARED = YES attribute
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* @return true if the DS is shared
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*/
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bool is_shared()
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{
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bool shared;
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if (!get_template_attribute("SHARED", shared))
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{
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shared = true;
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}
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return shared;
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};
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/**
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* Returns true if the DS_MAD_CONF has PERSISTENT_ONLY = "YES" flag
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* @return true if persistent only
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*/
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bool is_persistent_only() const;
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/**
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* Enable or disable the DS. Only for System DS.
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* @param enable true to enable
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* @param error_str Returns the error reason, if any
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*
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* @return 0 on success
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*/
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int enable(bool enable, std::string& error_str);
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/**
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* Return a set with compatible system ds for an image ds
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*/
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void get_compatible_system_ds(std::set<int> &compatible_sys_ds) const
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{
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std::string compatible_sys_ds_str;
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get_template_attribute("COMPATIBLE_SYS_DS", compatible_sys_ds_str);
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one_util::split_unique(compatible_sys_ds_str, ',', compatible_sys_ds);
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}
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/**
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* Verify the proper definition of the TM_MAD by checking the attributes
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* related to the TM defined in TM_MAD_CONF
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*/
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int get_tm_mad_targets(const std::string &tm_mad,
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std::string& ln_target,
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std::string& clone_target,
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std::string& disk_type) const;
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/**
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* Returns the default DRIVER to use with images and disks in this DS. The
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* precedence is:
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* 1. TM_MAD_CONF/DRIVER in oned.conf
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* 2. DRIVER in the DS template
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*
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* @param dsid of the datastore
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*
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* @return driver name or "" if not set or missing DS
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*/
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std::string get_ds_driver();
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private:
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// -------------------------------------------------------------------------
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// Friends
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// -------------------------------------------------------------------------
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friend class DatastorePool;
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// *************************************************************************
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// Datastore Private Attributes
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// *************************************************************************
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/**
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* Name of the datastore driver used to register new images
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*/
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std::string ds_mad;
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/**
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* Name of the TM driver used to transfer file to and from the hosts
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*/
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std::string tm_mad;
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/**
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* Base path for the storage
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*/
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std::string base_path;
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/**
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* The datastore type
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*/
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DatastoreType type;
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/**
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* Disk types for the Images created in this datastore
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*/
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Image::DiskType disk_type;
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/**
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* Total datastore capacity in MB
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*/
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long long total_mb;
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/**
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* Available datastore capacity in MB
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*/
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long long free_mb;
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/**
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* Used datastore capacity in MB
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*/
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long long used_mb;
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/**
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* Datastore state
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*/
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DatastoreState state;
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/**
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* Collection of image ids in this datastore
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*/
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ObjectCollection images;
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// *************************************************************************
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// Constructor
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// *************************************************************************
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Datastore(
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int uid,
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int gid,
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const std::string& uname,
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const std::string& gname,
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int umask,
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std::unique_ptr<DatastoreTemplate> ds_template,
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const std::set<int> &cluster_ids);
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/**
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* Sets the DISK_TYPE attribute for the datastore. This function will
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* check the type against the supported DiskTypes for each datastore type
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* (SYSTEM, IMAGE and FILE).
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* @param s_dt DISK_TYPE in string form. If empty Image::FILE will be used
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* @param error description if any. The string is upcased
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*
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* @return -1 if an inconsistent assigment is found
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*
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*/
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int set_ds_disk_type(std::string& s_dt, std::string& error);
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// *************************************************************************
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// DataBase implementation (Private)
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// *************************************************************************
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/**
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* Execute an INSERT or REPLACE Sql query.
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* @param db The SQL DB
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* @param replace Execute an INSERT or a REPLACE
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* @param error_str Returns the error reason, if any
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* @return 0 one success
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*/
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int insert_replace(SqlDB *db, bool replace, std::string& error_str);
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/**
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* Bootstraps the database table(s) associated to the Datastore
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* @return 0 on success
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*/
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static int bootstrap(SqlDB * db);
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/**
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* Writes the Datastore in the database.
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* @param db pointer to the db
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* @return 0 on success
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*/
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int insert(SqlDB *db, std::string& error_str) override;
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/**
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* Writes/updates the Datastore's data fields in the database.
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* @param db pointer to the db
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* @return 0 on success
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*/
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int update(SqlDB *db) override
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{
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std::string error_str;
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return insert_replace(db, true, error_str);
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}
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/**
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* Factory method for datastore templates
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*/
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std::unique_ptr<Template> get_new_template() const override
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{
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return std::make_unique<DatastoreTemplate>();
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}
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/**
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* Verify the proper definition of the DS_MAD by checking the attributes
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* related to the DS defined in DS_MAD_CONF specified in the Datastore
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* template
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*/
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int set_ds_mad(std::string &ds_mad, std::string &error_str);
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/**
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* Verify the proper definition of the TM_MAD by checking the attributes
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* related to the TM defined in TM_MAD_CONF
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*/
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int set_tm_mad(std::string &tm_mad, std::string &error_str);
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/**
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* Child classes can process the new template set with replace_template or
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* append_template with this method
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* @param error string describing the error if any
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* @return 0 on success
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* - encrypt secret attributes.
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*/
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int post_update_template(std::string& error) override;
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};
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#endif /*DATASTORE_H_*/
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