1VM::EC2::Volume(3)    User Contributed Perl Documentation   VM::EC2::Volume(3)
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NAME

6       VM::EC2::Volume - Object describing an Amazon EBS volume
7

SYNOPSIS

9         use VM::EC2;
10
11         $ec2       = VM::EC2->new(...);
12         @vol = $ec2->describe_volumes;
13         for my $vol (@vols) {
14           $id    = $vol->volumeId;
15           $size  = $vol->size;
16           $snap  = $vol->snapshotId;
17           $zone  = $vol->availabilityZone;
18           $status = $vol->status;
19           $ctime = $vol->createTime;
20           @attachments = $vol->attachments;
21           $attachment  = $vol->attachment;
22           $origin      = $vol->from_snapshot;
23           @snapshots   = $vol->to_snapshots;
24         }
25         $vols[0]->attach('i-12345','/dev/sdg1');
26         $vols[0]->deleteOnTermination('true');
27         $vols[0]->detach;
28         $vols[0]->create_snapshot('automatic snapshot')
29

DESCRIPTION

31       This object is used to describe an Amazon EBS volume. It is returned by
32       VM::EC2->describe_volumes().
33

METHODS

35       The following object methods are supported:
36
37        volumeId         -- ID of this volume.
38        size             -- Size of this volume (in GB).
39        snapshotId       -- ID of snapshot this volume was created from.
40        availabilityZone -- Availability zone in which this volume resides.
41        status           -- Volume state, one of "creating", "available",
42                            "in-use", "deleting", "deleted", "error"
43        createTime       -- Timestamp for when volume was created.
44        volumeType       -- The volume type, one of "standard", "io1", or "gp2"
45        iops             -- The number of I/O operations per second that the volume
46                            supports, an integer between 100 and 4000. Only valid for
47                            volumes of type "io1".
48        encrypted        -- True if volume is encrypted.
49        tags             -- Hashref containing tags associated with this group.
50                            See L<VM::EC2::Generic>.
51
52       In addition, this class provides several convenience functions:
53
54   $attachment  = $vol->attachment
55   @attachments = $vol->attachments
56       The attachment() method returns a VM::EC2::BlockDevice::Attachment
57       object describing the attachment of this volume to an instance. If the
58       volume is unused, then this returns undef.
59
60       The attachments() method is similar, except that it returns a list of
61       the attachments.  Currently an EBS volume can only be attached to one
62       instance at a time, but the Amazon call syntax supports multiple
63       attachments and this method is provided for future compatibility.
64
65   $attachment = $vol->attach($instance,$device)
66   $attachment = $vol->attach(-instance_id=>$instance,-device=>$device)
67       Attach this volume to an instance using virtual device $device. Both
68       arguments are required. The result is a
69       VM::EC2::BlockDevice::Attachment object which you can monitor by
70       calling current_status():
71
72           my $a = $volume->attach('i-12345','/dev/sdg');
73           while ($a->current_status ne 'attached') {
74              sleep 2;
75           }
76           print "volume is ready to go\n";
77
78   $attachment = $volume->detach()
79   $attachment = $volume->detach(-instance_id=>$instance_id, -device=>$device,
80       -force=>$force);
81       Detaches this volume. With no arguments, will detach the volume from
82       whatever instance it is currently attached to. Provide -instance_id
83       and/or -device as a check that you are detaching the volume from the
84       expected instance and device.
85
86       Optional arguments:
87
88        -instance_id    -- ID of the instance to detach from.
89        -device         -- How the device is exposed to the instance.
90        -force          -- Force detachment, even if previous attempts were
91                           unsuccessful.
92
93       The result is a VM::EC2::BlockDevice::Attachment object which you can
94       monitor by calling current_status():
95
96           my $a = $volume->detach;
97           while ($a->current_status ne 'detached') {
98              sleep 2;
99           }
100           print "volume is ready to go\n";
101
102   $boolean = $vol->deleteOnTermination([$boolean])
103       Get or set the deleteOnTermination flag for attached volumes. If the
104       volume is unattached, then this causes a fatal error. Called with no
105       arguments, this method returns the current state of the
106       deleteOnTermination flag for the volume's attachment. Called with a
107       true/false argument, the method sets the flag by calling
108       modify_instance_attributes() on the corresponding instance and returns
109       true if successful.
110
111   $snap = $vol->from_snapshot
112       Returns the VM::EC2::Snapshot object that this volume was originally
113       derived from. It will return undef if the resource no longer exists, or
114       if the volume was created from scratch.
115
116   @snap = $vol->to_snapshots
117       If this volume has been used to create one or more snapshots, this
118       method will return them as a list of VM::EC2::Snapshot objects.
119
120   $snapshot = $vol->create_snapshot('Description')
121       Create a snapshot of the volume and return a VM::EC2::Snapshot object.
122       To ensure a consistent snapshot, you should unmount the volume before
123       snapshotting it. The optional argument allows you to add a description
124       to the snapshot.
125
126       Here is an example:
127
128         $s = $volume->create_snapshot("Backed up at ".localtime);
129         while ($s->current_status eq 'pending') {
130            print "Progress: ",$s->progress,"% done\n";
131         }
132         print "Snapshot status: ",$s->current_status,"\n";
133
134   $status = $vol->current_status
135       This returns the up-to-date status of the volume. It works by calling
136       refresh() and then returning status().
137
138   $boolean = $vol->auto_enable_io([$new_boolean])
139       Get or set the auto-enable IO flag.
140
141   $boolean = $vol->enable_volume_io()
142       Enable volume I/O after it has been disabled by an Amazon health check.
143       If successful, the call will return true.
144

STRING OVERLOADING

146       When used in a string context, this object will interpolate the
147       volumeId.
148

SEE ALSO

150       VM::EC2 VM::EC2::Generic VM::EC2::Snapshot VM::EC2::BlockDevice
151       VM::EC2::BlockDevice::Attachment
152

AUTHOR

154       Lincoln Stein <lincoln.stein@gmail.com>.
155
156       Copyright (c) 2011 Ontario Institute for Cancer Research
157
158       This package and its accompanying libraries is free software; you can
159       redistribute it and/or modify it under the terms of the GPL (either
160       version 1, or at your option, any later version) or the Artistic
161       License 2.0.  Refer to LICENSE for the full license text. In addition,
162       please see DISCLAIMER.txt for disclaimers of warranty.
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166perl v5.36.0                      2022-07-22                VM::EC2::Volume(3)
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