Configuration LaCie-CloudBox

Reference information

• Device: Lacie-CloudBox 3TB
• Name: lacie-cloudbox
• Lacie-CloudBox dashboard: http://lacie-cloudbox/

• uname

uname -a
# Linux LaCie-CloudBox 2.6.31.14-svn7493 #1 Fri Oct 17 14:00:51 UTC 2014 armv5tel GNU/Linux

Configuration

First install

• Network share available at smb://lacie-cloudbox/.
• Cloudbox dashboard available at http://lacie-cloudbox.local.
• setup smtp access (smtp.scarlet.be, port 25)
• IP Configuration — fixed IP address 172.19.100.98
• Enable the netbackup-share (port 873, encrypted port 22)
• Create user beq06659, with private share.

MAC	00:d0:4b:96:34:32
IP	172.19.100.98
hostname	lacie-cloudbox

Rooting

See /shares/Family/tmp/lacie-nas-rooting.txt.

Install Git

To enable git, we must:

• Enable git logging in /etc/passwd.
• Enable git ssh logging in /etc/ssh/sshd_config

Git needs a lot of memory when compressing its database (occurs at each fetch!). To limit this, run as root:

git config --system pack.windowmemory 128m
git config --system pack.packsizelimit 1g
git config --system pack.threads 1
git config --system core.bigFileThreshold 16m

Then as user git, in all relevant projects (typically those with big files)

cd ~/git/minecraft_nosaves.git
git config --local core.bigFileThreshold 10m

Install rsync

We do via user git, so:

• Set /bin/bash as shell for user git in /etc/passwd
• Set PermitUserEnvironment yes in /etc/ssh/sshd_config
• Create file /shares/git/.ssh/environment to add rsync into path:

PATH=/opt/bin:/opt/sbin:/bin:/usr/bin:/sbin:/usr/sbin

Startup script

Create the file /opt/etc/init.d/S80config (chmod 755):

#! /bin/sh

# Enable /bin/bash as shell for user git to also allow rsync + git in ssh login
sed -ri '/^git/{s_/home_/shares/git_; s_/bin/false_/bin/bash_}' /etc/passwd
# sed -ri '/^git/{s_/home_/shares/git_; s_/bin/false_/opt/bin/git-shell_}' /etc/passwd

# Change permission for /shares/git or sshd will complain (or add 'StrictModes off to /etc/ssh/ssh_config)
chmod go-w /shares/git

# Configure sshd
if ! grep -q git /etc/ssh/sshd_config; then 
    # Enable ssh login with user git
    sed -ri '/^AllowUsers/s/$/ git/;$aMatch User git' /etc/ssh/sshd_config
    # Enable user environment for user git (in order to set PATH)
    sed -ri $'/^PermitRootLogin/{a PermitUserEnvironment yes\n}' /etc/ssh/sshd_config
    # Restart sshd
    ngc --restart sshd
fi

# Add git to path
if ! grep -q /opt/bin /etc/environment; then echo "PATH=/opt/bin:/opt/sbin" >> /etc/environment; fi

# Add extra addresses to /etc/hosts
if ! grep -q "###hosts.inc###" /etc/hosts; then cat /opt/etc/hosts.inc >> /etc/hosts; fi

Create the hosts include file /opt/etc/hosts.inc:

# ###hosts.inc### additional hosts for lacie-cloudbox
172.19.3.1      local.gateway            # Static
172.19.3.2      manticore                # Static?
172.19.100.1	gryphon
172.19.100.2	minimoy                  # DHCP Static        00:24:54:02:98:8d
172.19.100.3	unicorn                  # obsolete
172.19.100.4	beqleunxp1nb103          # obsolete
172.19.100.5	nxl67002ux               # obsolete
172.19.100.6	griffin                  # DHCP Static        68:b5:99:f2:4d:99
172.19.100.7	lambada                  # obsolete
172.19.100.8	reddragon
172.19.100.9    leviathan                # obsolete
172.19.100.10   nxl67063                 # obsolete
172.19.100.11   mandala                  # DHCP Static        00:1b:24:fa:a2:9b
172.19.100.12   nxl67002                 # obsolete
172.19.100.13   nxl67063ux               # obsolete
172.19.100.14   nxl67170ux               # DHCP Static        b8:ca:3a:cc:07:bf
172.19.100.15   pc-112-597               # DHCP Static        b8:ca:3a:93:91:27
172.19.100.16   zyratastic
172.19.100.17   graphicdaemon
172.19.100.18   xbmcbuntu                # DHCP Static        00:01:2e:4e:46:05 00:01:2e:4e:46:06
172.19.100.19   zavcxl0005               # DHCP Static        48:0f:cf:27:ad:ad
# 172.19.100.98	lacie-cloudbox           # Static
172.19.100.99	mnemosyne                # Static
172.19.100.102	minimoy-wlan             # DHCP Static        00:26:5e:37:83:ea
172.19.100.105	nxl67002ux-wlan          # DHCP Static
172.19.100.106	griffin-wlan             # DHCP Static        00:24:d7:7d:4e:94
172.19.100.107	apple-pi                 # Static
172.19.100.111  mandala-wlan             # DHCP Static        00:1d:92:13:d2:7d
172.19.100.114  nxl67170ux-wlan          # DHCP Static        84:3a:4b:22:0d:0c
172.19.100.116  zyratastic-wlan
172.19.100.118  xbmcbuntu-wlan           # DHCP Static        0c:d2:92:54:c1:53
172.19.100.119  zavcxl0005-wlan          # DHCP Static        ac:fd:ce:40:c5:31
172.19.100.120	galaxy

Install Unison

• ipkg provides unison 2.27.57. It can be installed via ipkg install unison.

ipkg list | grep unison
# unison - 2.27.57-2 - A cross-platform file-synchronization tool.

• To get a more recent version, see Unison to compile from source. v2.40.102 is the same as on Ubuntu Trusty 14.04.

Shares

family

• Mount with

sudo mount //lacie-cloudbox/beq06659 /mnt/any -o noperm,iocharset=utf8,sec=ntlm,username=public,password=

beq06659

• Mount with

sudo mount //lacie-cloudbox/beq06659 /mnt/any -o noperm,iocharset=utf8,sec=ntlm,username=beq06659

Backup

Backup Mnemosyne

We use unison.

/root/.unison/default.prf (<file name="default.prf" tag="source">download</file>)

# Unison default preferences file

# Fastcheck - by default false on windows machine, and true on Unix machine.
# When true, uses modification date + file size as inone number. Otherwise do a full scan
fastcheck = true

# If any new preferences are added by Unison (e.g. 'ignore'
# preferences added via the graphical UI), then store them in the
# default profile file
addprefsto = default.prf

# Ignore file permissions (necessary on samba/CIFS fs)
# perms = 0

# Make sure that both roots are mounted
mountpoint = .

# Common Ignore specification
ignore = Name System Volume Information

/root/.unison/musics.prf (<file name="musics.prf" tag="source">download</file>)

# Common include
include default.prf

root = /shares/Family/musics
root = ssh://root@mnemosyne//volume1/musics

# Where to find unison on remote server
servercmd = /opt/bin/unison

# don't ask for non-conflicting changes
auto = true

# We *MUST* sync permissions because unison defaults would prevent access to files/folders
# via samba shares (since unison runs as root)
# perms = 0

/root/.unison/archives.prf (<file name="archives.prf" tag="source">download</file>)

# Common include
include default.prf

root = /shares/Family/archives
root = ssh://root@mnemosyne//volume1/archives

# Where to find unison on remote server
servercmd = /opt/bin/unison

# don't ask for non-conflicting changes
auto = true

# We *MUST* sync permissions because unison defaults would prevent access to files/folders
# via samba shares (since unison runs as root)
# perms = 0

BackupPC

• See also Backuppc

Fix broken pipe errors

Backuppc requires lot of memory (rsync). To free as much as possible, I kill all python stuff (except ublock-daemon) and all media stuff:

pkill -SIGSTOP -f unicorn            # I stop it first so that it can't react
pkill -SIGKILL -f unicorn            # then kill it
sleep 1 && pkill -SIGSTOP -f unicorn # then stop it again because it respawns
pkill -SIGSTOP -f mt_daapd
pkill -SIGSTOP twonky
pkill -SIGSTOP php-cgi
pkill -SIGKILL -f mt-daapd           # media server stuff
pkill -SIGKILL twonky                # media server stuff
pkill -SIGKILL php-cgi               # php-cgi server launcher by lighttpd

Duplicity (Obsolete)

This section is OBSOLETE — I no longer use duplicity

• Backup done with deja-dup, which use duplicity as back-end
• Duplicity can't access samba share. Instead mount samba share locally, and use file:///smb/lacie-cloudbox/sharename instead. Note the triple slash.
• View available backup:

duplicity collection-status file:///smb/lacie-cloudbox/beq06659

• List file in current backup

duplicity list-current-files file:///smb/lacie-cloudbox/beq06659

Metadata information is stored in ~/.cache/duplicity. Attention, it seems this can grow quite large.

DHCP Server

• DHCP daemon configuration: /opt/etc/dhcpd.conf
• View current lease:

cat /opt/etc/dhcpd.leases

To do

• Current backup only includes files that are readable by user beq06659. It should include all files.
• Exclude some unnecessary folders. Organize these folders to ease future backup.
• Backup / filesystem (at least /etc, /usr/local)

Backup solutions

• deja-dup

• Need one setup for each pc
• No centralized management. Backup job could happen all at the same time. Same files between pc are stored multiple times.
• Easy to setup
• How to backup root filesystem?

• duplicity
• backuppc

• How to install?
• Will the NAS have enough memory?

• bacula

• Package readily available in OptWare

• rsnapshot

See question on bacula/backuppc/rsnapshot at http://serverfault.com/questions/282228/bacula-vs-backuppc

Rooting NAS and install new app

• TBC

Troubleshoot

sshd

• See log at /var/log/messages
• Check sshd config /etc/ssh/sshd_config:

• Make sure user is authorized:

 AllowUsers root netbackup git

• If user home is on /shares mount, then disable StrictModes

StrictModes no

• Enable user environment

PermitUserEnvironment yes

then

env > ~/.ssh/environment
vi ~/.ssh/environment                # Remove useless variables

• Edit /etc/passwd:

git:x:503:100:None:/shares/git:/opt/bin/git-shell

• Restart sshd:

ngc --restart sshd

git

• Check that environment is ok [1]

ssh git@lacie-cloudbox  "which git-upload-pack"

ntp

• Box loses regularly time synchronization, which then affects backuppc
• Workaround: log into https://lacie-cloudbox/, and reset ntp (uncheck / check ntp server).

slow performance, lot of swapping

The Lacie-Cloudbox only has 256MB physical memory, and some processes takes a lot of memory. When doing some unusual tasks, we can disable (stop) temporarily these processes, without apparently damage:

pkill -SIGSTOP twonky        # Usually consuming around 100MB+
pkill -f -SIGSTOP unicorn    # A python process running /usr/lib/unicorn/run.py (and consuming 100MB+)

To restart:

pkill -SIGCONT twonky
pkill -f -SIGCONT unicorn