Setup Remote Logging on an Ubuntu rsyslog Server for DD-WRT to Use

Enable remote logging on an Ubuntu server by configuring rsyslog to allow remote connections from port 514 (adjust as needed):

sudo nano /etc/rsyslog.conf

Uncomment the imudp and imtcp load module statements like so (adjusting as needed):

# provides UDP syslog reception
module(load="imudp")
input(type="imudp" port="514")

# provides TCP syslog reception
module(load="imtcp")
input(type="imtcp" port="514")

Create a logging template and apply it only to remote hosts that start with "c-" (comcast connection remote host prefix [followed by the IP address of the device which can change])

# Comcast remote logging
$template remote-incoming-logs, "/var/log/remote_logs/%HOSTNAME%/%PROGRAMNAME%.$
if $fromhost startswith "c-" then -?remote-incoming-logs

Save and quit.

Restart the rsyslog daemon:

sudo service rsyslog restart

Remote logs will be stored in /var/log/remote_logs

Configure logrotate to process and rotate these logs automatically (so you don't lose them and have a history on them):

sudo nano /etc/logrotate.d/ddwrt

Paste these contents into the file:

/var/log/remote_logs/*.log /var/log/remote_logs/*/*.log {
    daily
    missingok
    compress
    delaycompress
    su syslog adm
}

Save and quit.

Everything has been configured, and remote logging should work from your DD-WRT router once you set the remote URL to your server's IPAddress:port combo and apply the changed settings.

Transferring LVM Containers

Before you transfer a KVM container to another machine, create a KVM virtual machine on the target server with the same or larger disk size than the container being transferred. 

You can see a full list of LVM containers by using the below command:

sudo lvdisplay

Copying an LVM Container from the Local Machine to a Remote Server

sudo -i
dd if=/dev/vms/phpdev bs=4096 | pv | ssh root@IPADDRESS_HERE -p SSH_PORT 'dd of=/dev/pool/phpdev bs=4096'

Adjust the above pool paths as necessary since this may vary from server to server. 

Copying an LVM Container from a Remote Machine to the Local Machine

sudo -i
ssh root@IPADDRESS_HERE -p SSH_PORT "dd if=/dev/vms/phpdev bs=4096" | dd of="/dev/vms/phpdev" bs="4096"

Adjust the above pool paths as necessary since this may vary from server to server. 

With SSH Passphrase Key

If you're using an SSH key that is protected with a passphrase, use the below commands to open the key, provide the passphrase for that key, and copy the containers without being prompted for the passphrase when the container transfer begins:

sudo -i
eval $(ssh-agent)
ssh-add /root/keys/{PATH_TO_KEY}
dd if=/dev/pool/test bs=4096 | pv | ssh root@host.com -p {PORT} -i /root/keys/{PATH_TO_KEY} 'dd of=/dev/haha/test bs=4096'