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one/include/Image.h
Vlastimil Holer 096754b63f
M #-: Bump year to 2021 (#778)
2021-02-09 16:07:56 +01:00

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/* ------------------------------------------------------------------------ */
/* Copyright 2002-2021, OpenNebula Project, OpenNebula Systems */
/* */
/* 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. */
/* -------------------------------------------------------------------------*/
#ifndef IMAGE_H_
#define IMAGE_H_
#include "PoolSQL.h"
#include "ImageTemplate.h"
#include "ObjectCollection.h"
#include "Snapshots.h"
class VirtualMachineDisk;
/**
* The Image class.
*/
class Image : public PoolObjectSQL
{
public:
/**
* Type of Images
*/
enum ImageType
{
OS = 0, /** < Base OS image */
CDROM = 1, /** < An ISO9660 image */
DATABLOCK = 2, /** < User persistent data device */
KERNEL = 3, /** < Kernel files */
RAMDISK = 4, /** < Initrd files */
CONTEXT = 5 /** < Context files */
};
/**
* Return the string representation of an ImageType
* @param ob the type
* @return the string
*/
static std::string type_to_str(ImageType ob)
{
switch (ob)
{
case OS: return "OS" ; break;
case CDROM: return "CDROM" ; break;
case DATABLOCK: return "DATABLOCK" ; break;
case KERNEL: return "KERNEL" ; break;
case RAMDISK: return "RAMDISK" ; break;
case CONTEXT: return "CONTEXT" ; break;
default: return "";
}
};
/**
* Return the string representation of an ImageType
* @param ob the type
* @return the string
*/
static ImageType str_to_type(std::string& str_type);
/**
* Type of Disks (used by the VMM_MAD). Values: BLOCK, CDROM or
* FILE
*/
enum DiskType
{
FILE = 0, /** < File-based disk */
CD_ROM = 1, /** < An ISO9660 disk */
BLOCK = 2, /** < Block-device disk */
RBD = 3, /** < CEPH RBD disk */
RBD_CDROM = 4, /** < CEPH RBD CDROM disk */
GLUSTER = 5, /** < Gluster Block Device */
GLUSTER_CDROM = 6, /** < Gluster CDROM Device Device */
SHEEPDOG = 7, /** < Sheepdog Block Device */
SHEEPDOG_CDROM = 8, /** < Sheepdog CDROM Device Device */
ISCSI = 9, /** < iSCSI Volume (Devices Datastore) */
NONE = 255 /** < No disk type, error situation */
};
/**
* Return the string representation of a DiskType
* @param ob the type
* @return the string
*/
static std::string disk_type_to_str(DiskType ob)
{
switch (ob)
{
case FILE: return "FILE" ; break;
case CD_ROM: return "CDROM" ; break;
case BLOCK: return "BLOCK" ; break;
case RBD: return "RBD" ; break;
case RBD_CDROM: return "RBD_CDROM" ; break;
case GLUSTER: return "GLUSTER" ; break;
case GLUSTER_CDROM: return "GLUSTER_CDROM" ; break;
case SHEEPDOG: return "SHEEPDOG" ; break;
case SHEEPDOG_CDROM: return "SHEEPDOG_CDROM" ; break;
case ISCSI: return "ISCSI" ; break;
default: return "";
}
};
/**
* Return the string representation of a DiskType
* @param s_disk_type string representing the DiskTypr
* @return the DiskType (defaults to FILE)
*/
static DiskType str_to_disk_type(std::string& s_disk_type);
/**
* Image State
*/
enum ImageState
{
INIT = 0, /** < Initialization state */
READY = 1, /** < Image ready to use */
USED = 2, /** < Image in use */
DISABLED = 3, /** < Image can not be instantiated by a VM */
LOCKED = 4, /** < FS operation for the Image in process */
ERROR = 5, /** < Error state the operation FAILED*/
CLONE = 6, /** < Image is being cloned */
DELETE = 7, /** < DS is deleting the image */
USED_PERS = 8, /** < Image is in use and persistent */
LOCKED_USED = 9, /** < FS operation in progress, VMs waiting */
LOCKED_USED_PERS = 10 /** < FS operation in progress, VMs waiting. Persistent */
};
/**
* Returns the string representation of an ImageState
* @param state The state
* @return the string representation
*/
static std::string state_to_str(ImageState state)
{
switch (state)
{
case INIT: return "INIT"; break;
case READY: return "READY"; break;
case USED: return "USED"; break;
case DISABLED: return "DISABLED"; break;
case LOCKED: return "LOCKED"; break;
case ERROR: return "ERROR"; break;
case CLONE: return "CLONE"; break;
case DELETE: return "DELETE"; break;
case USED_PERS: return "USED"; break;
case LOCKED_USED: return "LOCKED_USED"; break;
case LOCKED_USED_PERS: return "LOCKED_USED"; break;
default: return "";
}
};
static ImageState str_to_state(std::string& str_state);
// *************************************************************************
// Image Public Methods
// *************************************************************************
virtual ~Image() = default;
/**
* Function to print the Image object into a string in XML format
* @param xml the resulting XML string
* @return a reference to the generated string
*/
std::string& to_xml(std::string& xml) const override;
/**
* Rebuilds the object from an xml formatted string
* @param xml_str The xml-formatted string
*
* @return 0 on success, -1 otherwise
*/
int from_xml(const std::string &xml_str) override;
/**
* Returns true if the image is persistent
* @return true if the image is persistent
*/
bool is_persistent() const
{
return (persistent_img == 1);
};
/**
* @return true if the image is in a locked state
*/
bool is_locked() const
{
return state == LOCKED || state == LOCKED_USED || state == LOCKED_USED_PERS;
};
/**
* Check the PERSISTENT attribute in an image Template, if not set the
* DEFAULT_IMAGE_PERSISTENT and DEFAULT_IMAGE_PERSISTENT_NEW are check in
* user/group/oned.conf to set the attribute in the image.
* @param image_template
* @param uid of the user making the request
* @param gid of the group of the user making the request
* @param is_allocate true for one.image.allocate API Calls
* @return true if the image is set to persistent, false otherwise
*/
static bool test_set_persistent(Template * image_template, int uid, int gid,
bool is_allocate);
/**
* Returns the source path of the image
* @return source of image
*/
const std::string& get_source() const
{
return source;
}
/**
* Returns the original path of the image
* @return path of image
*/
const std::string& get_path() const
{
return path;
}
/**
* Returns the format of the image (defined for datablocks)
* @return format
*/
const std::string& get_format() const
{
return format;
}
/**
* Sets the format of the image
*/
void set_format(const std::string& _format)
{
format = _format;
}
/**
* Returns the size of the image
* @return size in MB
*/
long long get_size() const
{
return size_mb;
}
/**
* Sets the source path of the image
*/
void set_source(const std::string& _source)
{
source = _source;
}
/**
* Sets the size for the image
*/
void set_size(long long _size_mb)
{
size_mb = _size_mb;
}
/**
* Returns the type of the image
* @return type
*/
ImageType get_type() const
{
return type;
}
/**
* Returns the image state
* @return state of image
*/
ImageState get_state() const
{
return state;
}
/**
* Sets the image state
* @param state of image
*/
void set_state(ImageState _state);
/**
* Sets the previous state
*/
void set_prev_state()
{
prev_state = state;
}
/**
* Test if the Image has changed state since last time prev state was set
* @return true if state changed
*/
bool has_changed_state() const
{
return prev_state != state;
}
/**
* Moves the image from the locked* states to ready, used, used_persistent
*/
void set_state_unlock();
/**
* Return the ID of the image we are cloning this one from (if any)
*/
int get_cloning_id() const
{
return cloning_id;
}
/**
* Sets the ID of the image we are cloning this one from (if any)
*/
void set_cloning_id(int id)
{
cloning_id = id;
}
/**
* Clear the cloning state of the image
*/
void clear_cloning_id()
{
cloning_id = -1;
}
/* ---------------------------------------------------------------------- */
/* Access Image Counters (running vms and cloning operations ) */
/* ---------------------------------------------------------------------- */
int dec_running(int vm_id)
{
if ( vm_collection.del(vm_id) == 0 )
{
running_vms--;
}
return running_vms;
}
int inc_running(int vm_id)
{
if ( vm_collection.add(vm_id) == 0 )
{
running_vms++;
}
return running_vms;
}
int get_running() const
{
return running_vms;
}
const std::set<int>& get_running_ids() const
{
return vm_collection.get_collection();
}
int get_cloning() const
{
return cloning_ops;
}
int dec_cloning(PoolObjectSQL::ObjectType ot, int oid)
{
int rc = -1;
if (ot == PoolObjectSQL::IMAGE)
{
rc = img_clone_collection.del(oid);
}
else //if (ot == PoolObjectSQL::MARKETPLACEAPP)
{
rc = app_clone_collection.del(oid);
}
if ( rc == 0 )
{
cloning_ops--;
}
return cloning_ops;
}
int inc_cloning(PoolObjectSQL::ObjectType ot, int oid)
{
int rc = -1;
if (ot == PoolObjectSQL::IMAGE)
{
rc = img_clone_collection.add(oid);
}
else //if (ot == PoolObjectSQL::MARKETPLACEAPP)
{
rc = app_clone_collection.add(oid);
}
if ( rc == 0 )
{
cloning_ops++;
}
return cloning_ops;
}
/**
* Sets the Image type.
*
* @param _type the new type. It will be transformed to upper case
* @return 0 on success, -1 otherwise
*/
int set_type(std::string& _type, std::string& error);
/**
* Check if the image is used for saving_as a current one
* @return true if the image will be used to save an existing image.
*/
bool is_saving()
{
return static_cast<ImageTemplate*>(obj_template.get())->is_saving();
}
/**
* Set/Unset an image as persistent
* @param persistent true to make an image persistent
* @param error_str Returns the error reason, if any
*
* @return 0 on success
*/
int persistent(bool persis, std::string& error_str)
{
std::ostringstream oss;
if ((snapshots.size() > 0) && !persis)
{
error_str = "Image has snapshots.";
return -1;
}
switch (state)
{
case USED:
case CLONE:
case USED_PERS:
case LOCKED_USED:
case LOCKED_USED_PERS:
oss << "Image cannot be in state " << state_to_str(state) <<".";
error_str = oss.str();
return -1;
case INIT:
case READY:
case DISABLED:
case LOCKED:
case ERROR:
case DELETE:
if (persis == true)
{
persistent_img = 1;
}
else
{
persistent_img = 0;
}
break;
}
return 0;
}
/**
* Modifies the given disk attribute adding the following attributes:
* * SOURCE: the file-path.
* * TARGET: will only be set if the Image's definition includes it.
*
* @param disk attribute for the VM template
* @param img_type will be set to the used image's type
* @param dev_prefix will be set to the defined dev_prefix,
* or the default one
* @param inherit_attrs Attributes to be inherited from the image template
* into the disk
*
*/
void disk_attribute(VirtualMachineDisk * disk,
ImageType& img_type,
std::string& dev_prefix,
const std::vector<std::string>& inherit_attrs);
/**
* Factory method for image templates
*/
std::unique_ptr<Template> get_new_template() const override
{
return std::make_unique<ImageTemplate>();
}
/**
* Returns the Datastore ID
*/
int get_ds_id() const
{
return ds_id;
};
/**
* Returns the Datastore name
*/
const std::string& get_ds_name() const
{
return ds_name;
};
/**
* Updates the Datastore name
*/
void set_ds_name(const std::string& name)
{
ds_name = name;
};
/**
* Clones this image template including image specific attributes: NAME,
* TYPE, PATH, FORMAT, SIZE and PERSISTENT
* @param new_name Value for the NAME attribute
* @return Pointer to the new tempalte 0 in case of success
*/
std::unique_ptr<ImageTemplate> clone_template(const std::string& nn) const;
/* ---------------------------------------------------------------------- */
/* Snapshots functions */
/* ---------------------------------------------------------------------- */
/**
* Return the snapshot list of this image
*/
const Snapshots& get_snapshots() const
{
return snapshots;
};
/**
* Clear all the snapshots in the list
*/
void clear_snapshots()
{
snapshots.clear();
}
/**
* Set the snapshots for this image
* @param snapshot list
*/
void set_snapshots(const Snapshots& s)
{
snapshots = s;
snapshots.clear_disk_id();
};
void delete_snapshot(int snap_id)
{
snapshots.delete_snapshot(snap_id);
};
void revert_snapshot(int snap_id)
{
snapshots.active_snapshot(snap_id, true);
};
void set_target_snapshot(int snap_id)
{
target_snapshot = snap_id;
};
int get_target_snapshot() const
{
return target_snapshot;
};
void clear_target_snapshot()
{
target_snapshot = -1;
};
private:
// -------------------------------------------------------------------------
// Friends
// -------------------------------------------------------------------------
friend class ImagePool;
// -------------------------------------------------------------------------
// Image Description
// -------------------------------------------------------------------------
/**
* Type of the Image
*/
ImageType type;
/**
* Type for the Disk
*/
DiskType disk_type;
/**
* Persistency of the Image
*/
int persistent_img;
/**
* Registration time
*/
time_t regtime;
/**
* Path to the image
*/
std::string source;
/**
* Original Path to the image (optional if source is given or datablock)
*/
std::string path;
/**
* Format of the image file (e.g qcow2, raw, ...)
*/
std::string format;
/**
* Filesystem of the image file (e.g ext4, xfs, ...)
*/
std::string fs;
/**
* Size of the image in MB
*/
long long size_mb;
/**
* Image state
*/
ImageState state;
ImageState prev_state;
/**
* Number of VMs using the image
*/
int running_vms;
/**
* Number of pending cloning operations, for both images and apps
*/
int cloning_ops;
/**
* Indicates if this Image is a clone of another one.
* Once the clone process is complete, it should be set to -1
*/
int cloning_id;
/**
* Datastore ID
*/
int ds_id;
/**
* Datastore name
*/
std::string ds_name;
/**
* Stores a collection with the VMs using the image
*/
ObjectCollection vm_collection;
/**
* Stores a collection with the Images cloning this image
*/
ObjectCollection img_clone_collection;
/**
* Stores a collection with the Marketplace apps cloning this image
*/
ObjectCollection app_clone_collection;
/**
* Snapshot list for this image
*/
Snapshots snapshots;
/**
* ID of the snapshot being processed (if any)
*/
int target_snapshot;
// *************************************************************************
// DataBase implementation (Private)
// *************************************************************************
/**
* Execute an INSERT or REPLACE Sql query.
* @param db The SQL DB
* @param replace Execute an INSERT or a REPLACE
* @param error_str Returns the error reason, if any
* @return 0 on success
*/
int insert_replace(SqlDB *db, bool replace, std::string& error_str);
/**
* Bootstraps the database table(s) associated to the Image
* @return 0 on success
*/
static int bootstrap(SqlDB * db);
/**
* "Encrypts" the password with SHA256 digest
* @param password
* @return sha256 encrypted password
*/
static std::string sha256_digest(const std::string& pass);
protected:
// *************************************************************************
// Constructor
// *************************************************************************
Image(int uid,
int gid,
const std::string& uname,
const std::string& gname,
int umask,
std::unique_ptr<ImageTemplate> img_template);
// *************************************************************************
// DataBase implementation
// *************************************************************************
/**
* Writes the Image in the database.
* @param db pointer to the db
* @return 0 on success
*/
int insert(SqlDB *db, std::string& error_str) override;
/**
* Writes/updates the Images data fields in the database.
* @param db pointer to the db
* @return 0 on success
*/
int update(SqlDB *db) override;
};
#endif /*IMAGE_H_*/
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