Total: 21
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Вт, 13 сентября 2016, 11:17

chroot ssh linux user



#Subsystem sftp /usr/lib/openssh/sftp-server

Subsystem sftp internal-sftp


Match group chrooted

    ChrootDirectory /www/sites

    X11Forwarding no

    AllowTcpForwarding no

    ForceCommand internal-sftp





Вт, 19 апреля 2016, 15:39

kvm live backup

Live backup of your VM running in KVM under Ubuntu using qcow2 disk images


# First of all disable apparmor to allow access


aa-complain /usr/sbin/libvirtd

aa-complain /etc/apparmor.d/libvirt/libvirt-xxxxxxxxxxxxxxxxxx


# View disks

virsh domblklist test-backup


# Suspend the domain (This is optional. I do this so that the condition of virtual machines remains unchanged during the backup.)

virsh suspend test-backup


# Create snapshot

virsh snapshot-create-as --domain test-backup test-snap1 \

--diskspec vda,file=/home/virtual/test_backup/test-c.img \

--diskspec vdb,file=/home/virtual/test_backup/test-d.img \

--disk-only --atomic

# or

virsh snapshot-create-as --domain test-backup test-backup-snap1 --disk-only --atomic


# View snapshots

virsh snapshot-list test-backup


# View disks (it must be running on snapshots)

virsh domblklist test-backup


# Copy drives to backup dir

rsync -avh --progress drive-c.qcow2 export/drive-c.qcow2-copy

rsync -avh --progress drive-d.qcow2 export/drive-d.qcow2-copy


# Perform active blockcommit by live merging contents

virsh blockcommit test-backup vda --active --verbose --pivot

virsh blockcommit test-backup vdb --active --verbose --pivot


# View disks (it must be running on normal drives)

virsh domblklist test-backup


# Unsuspend the domain

virsh resume test-backup


# View snapshots again

virsh snapshot-list test-backup


# Delete snapshots

virsh snapshot-delete test-backup test-backup-snap1 --metadata


# View snapshots to check 

virsh snapshot-list test-backup


# Delete snapshot files


rm -f /home/virtual/test_backup/drive-c.test-backup-snap1

rm -f /home/virtual/test_backup/drive-d.test-backup-snap1




Пт, 9 октября 2015, 11:19

Installing PostgreSQL BDR

Install PostgreSQL BDR

For those who get the error:

apt-get install postgresql-bdr-9.4
The following packages have unmet dependencies:
postgresql-bdr-9.4: Depends: postgresql-bdr-client-9.4 but it is not going to be installed
E: Unable to correct problems, you have held broken packages.


apt-get install postgresql-bdr-client-9.4
The following packages have unmet dependencies:
postgresql-bdr-client-9.4: Depends: libpq5 (>= 9.4.4) but it is not going to be installed
E: Unable to correct problems, you have held broken packages.


That's my solution based on and


sudo sh -c 'echo "deb $(lsb_release -cs)-pgdg main" > /etc/apt/sources.list.d/pgdg.list'

sudo sh -c 'echo "deb $(lsb_release -cs)-2ndquadrant main" > /etc/apt/sources.list.d/2ndquadrant.list.list'

sudo apt-get install wget ca-certificates

sudo wget --quiet -O - | sudo apt-key add -

sudo wget --quiet -O - | sudo apt-key add -

sudo apt-get update

sudo apt-get upgrade

sudo apt-get install postgresql-bdr-9.4 postgresql-bdr-9.4-bdr-plugin





On the Source SmartOS Node:

zfs snapshot zones/d8944236-9d33-40ce-a112-5445cc40c412@migration
zfs snapshot zones/d8944236-9d33-40ce-a112-5445cc40c412-disk0@migration
zfs send zones/d8944236-9d33-40ce-a112-5445cc40c412@migration  | ssh root@ zfs recv zones/d8944236-9d33-40ce-a112-5445cc40c412
zfs send zones/d8944236-9d33-40ce-a112-5445cc40c412-disk0@migration  | ssh root@ zfs recv zones/d8944236-9d33-40ce-a112-5445cc40c412-disk0
scp /etc/zones/d8944236-9d33-40ce-a112-5445cc40c412.xml root@

On the Target SmartOS Node:

echo 'd8944236-9d33-40ce-a112-5445cc40c412:installed:/zones/d8944236-9d33-40ce-a112-5445cc40c412:d8944236-9d33-40ce-a112-5445cc40c412' >> /etc/zones/index
vmadm boot d8944236-9d33-40ce-a112-5445cc40c412


Non-Global Zone:

It's simple:

[root@]# vmadm send 1a666e33-f4ca-4c4e-a4c6-a47dd3d78096 | ssh vmadm receive

Successfully sent VM 1a666e33-f4ca-4c4e-a4c6-a47dd3d78096
Successfully received VM 1a666e33-f4ca-4c4e-a4c6-a47dd3d78096




Total: 21
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