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BackupRestore changed

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Updated emergency backup recovery procedure
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Axon 2015-01-13 14:14:52 +00:00
parent 2fae13daab
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BackupRestore.md
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@ -78,11 +78,14 @@ Emergency Backup Recovery without Qubes
The Qubes backup system has been designed with emergency disaster recovery in mind. No special Qubes-specific tools are required to access data backed up by Qubes. In the event a Qubes system is unavailable, you can access your data on any GNU/Linux system with the following procedure. The Qubes backup system has been designed with emergency disaster recovery in mind. No special Qubes-specific tools are required to access data backed up by Qubes. In the event a Qubes system is unavailable, you can access your data on any GNU/Linux system with the following procedure.
> **Note:** In the following example, the backup file is assumed to be both encrypted and compressed.
1. Untar the main backup file. 1. Untar the main backup file.
``` {.wiki} ``` {.wiki}
[user@restore ~]$ cd backups [user@restore ~]$ tar -i -xvf qubes-backup-2013-12-26-123456
[user@restore backups]$ tar -i -xvf qubes-backup-2013-12-26-123456 backup-header
backup-header.hmac
qubes.xml.000 qubes.xml.000
qubes.xml.000.hmac qubes.xml.000.hmac
vm1/private.img.000 vm1/private.img.000
@ -100,18 +103,20 @@ The Qubes backup system has been designed with emergency disaster recovery in mi
1. Verify the integrity of the `private.img` file which houses your data. 1. Verify the integrity of the `private.img` file which houses your data.
``` {.wiki} ``` {.wiki}
[user@restore backups]$ openssl dgst -hmac "your_passphrase" vm1/private.img.000 [user@restore ~]$ cd vm1/
HMAC-SHA1(vm1/private.img.000)= 0d5855222a697d0568cf97792318fe53fe963a05 [user@restore vm1]$ openssl dgst -sha512 -hmac "your_passphrase" private.img.000
[user@restore backups]$ cat vm1/private.img.000.hmac HMAC-SHA512(private.img.000)= cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e
(stdin)= 0d5855222a697d0568cf97792318fe53fe963a05 [user@restore vm1]$ cat private.img.000.hmac
(stdin)= cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e
``` ```
> **Note:** The hash values should match. If they do not match, then the backup file may have been tampered with, or there may have been a storage error. > **Note:** The hash values should match. If they do not match, then the backup file may have been tampered with, or there may have been a storage error.
> **Note:** If your backup was hashed with a message digest algorithm other than `sha512`, you must substitute the correct message digest command. A complete list of supported message digest algorithms can be found with `openssl list-message-digest-algorithms`.
1. Decrypt the `private.img` file. 1. Decrypt the `private.img` file.
``` {.wiki} ``` {.wiki}
[user@restore ~]$ cd vm1
[user@restore vm1]$ openssl enc -d -pass pass:your_passphrase -aes-256-cbc -in private.img.000 -out private.img.dec.000 [user@restore vm1]$ openssl enc -d -pass pass:your_passphrase -aes-256-cbc -in private.img.000 -out private.img.dec.000
``` ```
@ -124,9 +129,18 @@ The Qubes backup system has been designed with emergency disaster recovery in mi
> done > done
> ``` > ```
> **Note:** If your backup was encrypted with a cipher algorithm other than `aes-256-cbc`, you must replace it with the correct cipher command. Available ciphers algorithms can be found with `openssl list-cipher-algorithms`. > **Note:** If your backup was encrypted with a cipher algorithm other than `aes-256-cbc`, you must substitute the correct cipher command. A complete list of supported cipher algorithms can be found with `openssl list-cipher-algorithms`.
1. Untar the decrypted `private.img` file. 1. Decompress the decrypted `private.img` file.
``` {.wiki}
[user@restore vm1]$ zforce private.img.dec.*
[user@restore vm1]$ gunzip private.img.dec.000.gz
```
> **Note:** If your backup was compressed with a program other than `gzip`, you must substitute the correct compression program.
1. Untar the decrypted and decompressed `private.img` file.
``` {.wiki} ``` {.wiki}
[user@restore vm1]$ tar -M -xvf private.img.dec.000 [user@restore vm1]$ tar -M -xvf private.img.dec.000
@ -150,14 +164,18 @@ The Qubes backup system has been designed with emergency disaster recovery in mi
1. Mount the private.img file and access your data. 1. Mount the private.img file and access your data.
``` {.wiki} ``` {.wiki}
[user@restore vm1]$ cd vm1 [user@restore vm1]$ sudo mkdir /mnt/img
[user@restore vm1]$ sudo mkdir /mnt/recovered-image [user@restore vm1]$ sudo mount -o loop vm1/private.img /mnt/img/
[user@restore vm1]$ sudo mount -o loop private.img /mnt/recovered-image [user@restore vm1]$ cat /mnt/img/home/user/your_data.txt
[user@restore vm1]$ cd This data has been successfully recovered!
[user@restore ~]$ cat /mnt/recovered-image/home/user/recovered-data.txt
This data has been recovered successfully!
``` ```
> **Note:** You may wish to store a plain text copy of these instructions with your Qubes backups in the event that you fail to recall the above procedure while this web page is inaccessible. You may download a plain text copy of this page by clicking the `Plain Text` link at the bottom of this page (as with every page on this wiki). In addition, the whole wiki is synced hourly with a public Git repo at:
>
> ``` {.wiki}
> git://gitorious.org/qubes-os/wiki.git
> ```
Migrating Between Two Physical Machines Migrating Between Two Physical Machines
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