Clustered Samba in a Briefcase Kai Blin kai@samba.org, @kaiblin Team 2016-05-12
Outline Introduction Hardware Used Software Used Setup Hardware Software Remaining Issues Demo Kai Blin CC-BY-SA 3.0 Cluster Briefcase (2 / 25)
Introduction ◮ About Myself ◮ Hardware Used ◮ Software Used Kai Blin CC-BY-SA 3.0 Cluster Briefcase (3 / 25)
About Myself ◮ M.Sc. in computational biology ◮ Ph.D. in microbiology ◮ Samba Team member Kai Blin CC-BY-SA 3.0 Cluster Briefcase (4 / 25)
Hardware Used ◮ 3x RaspberryPi2 ◮ 4-port switch ◮ 4-port USB PSU Kai Blin CC-BY-SA 3.0 Cluster Briefcase (5 / 25)
RaspberryPi2 ◮ 900 MHz ARMv7 Cortex-A7 QuadCore ◮ 1 GB RAM ◮ 4 USB 2.0 ports ◮ 100 MbE Source: Multicherry, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=38558176 Kai Blin CC-BY-SA 3.0 Cluster Briefcase (6 / 25)
Software Used ◮ Arch Linux ARM ◮ GlusterFS ◮ Samba 4.4.2 / CTDB Kai Blin CC-BY-SA 3.0 Cluster Briefcase (7 / 25)
Arch Linux ARM ◮ ARM port of Arch Linux ◮ Supports ARMv5 – ARMv7 hardware ◮ Leightweight ◮ Active community Kai Blin CC-BY-SA 3.0 Cluster Briefcase (8 / 25)
GlusterFS ◮ Current release: 3.7.11 ◮ Clustering for common, off-the-shelf hardware ◮ Packaged for ArchLinux Kai Blin CC-BY-SA 3.0 Cluster Briefcase (9 / 25)
Samba 4 ◮ Current release: Samba 4.4.3 ◮ Active Directory Domain controller ◮ Scales from micro to http://crazeric.deviantart.com CC-BY-SA macro Kai Blin CC-BY-SA 3.0 Cluster Briefcase (10 / 25)
Outline Introduction Hardware Used Software Used Setup Hardware Software Remaining Issues Demo Kai Blin CC-BY-SA 3.0 Cluster Briefcase (11 / 25)
Hardware Kai Blin CC-BY-SA 3.0 Cluster Briefcase (12 / 25)
Basic Setup ◮ Set up RaspberryPis ◮ It’s in GitHub: https://github.com/kblin/rpi-cluster # Push system on pre -partitioned SD card at /dev/mmcblk0 ./ install/format.sh # restore host -specific config ./ install/bootstrap.sh <hostname > # Done :) # Ok , actually , you still need to put SD into the # RPi , boot , and pacman -S python2 Kai Blin CC-BY-SA 3.0 Cluster Briefcase (13 / 25)
Ansible ◮ Use to bootstrap the setup ◮ It’s in GitHub: https://github.com/kblin/rpi-ctdb-ansible # First install GlusterFS ansible -playbook -i inventory install_gluster .yml # For now , we need a custom version of the Samba packages pacman -U samba*xz # Then install Samba stuff ansible -playbook -i inventory install_samba .yml] Kai Blin CC-BY-SA 3.0 Cluster Briefcase (14 / 25)
CTDB ◮ Need to add --with-clustering to ArchLinux build ◮ Binaries packaged, config files not ◮ Copy over files using Ansible ◮ Some fixes to config files needed for Arch ◮ Tweaks to startup scripts ◮ Details on GitHub Kai Blin CC-BY-SA 3.0 Cluster Briefcase (15 / 25)
Samba smb.conf [global] # Cluster settings clustering = yes # Load shares from registry ctdb:registry.tdb=yes include=registry Kai Blin CC-BY-SA 3.0 Cluster Briefcase (16 / 25)
Samba (cont.) net conf setparm global "workgroup" "CLUSTER" net conf setparm global "netbios name" "storage" net conf setparm global "security" "user" net conf setparm global "idmap backend" "tdb2" net conf addshare public /data/packages \ writeable=y guest_ok=N "Demo share" Kai Blin CC-BY-SA 3.0 Cluster Briefcase (17 / 25)
DNS ◮ Round-robin A record for public IPs ◮ Here: dnsmasq and /etc/hosts ◮ Should use BIND in real setup ◮ Or maybe Samba DNS once we implement round-robin Kai Blin CC-BY-SA 3.0 Cluster Briefcase (18 / 25)
Outline Introduction Hardware Used Software Used Setup Hardware Software Remaining Issues Demo Kai Blin CC-BY-SA 3.0 Cluster Briefcase (19 / 25)
SCHED FIFO ◮ Not working in ARM for some reason ◮ Fortunately, CTDB doesn’t need it Kai Blin CC-BY-SA 3.0 Cluster Briefcase (20 / 25)
GlusterFS ◮ Locking doesn’t work properly (yet) Kai Blin CC-BY-SA 3.0 Cluster Briefcase (21 / 25)
Outline Introduction Hardware Used Software Used Setup Hardware Software Remaining Issues Demo Kai Blin CC-BY-SA 3.0 Cluster Briefcase (22 / 25)
Demo DEMO Kai Blin CC-BY-SA 3.0 Cluster Briefcase (23 / 25)
Future Plans ◮ Get CTDB packaged in ArchLinux ◮ Go fully self-contained ◮ 2-node cluster + 1 Samba AD DC? Kai Blin CC-BY-SA 3.0 Cluster Briefcase (24 / 25)
Thank you ◮ Questions? ◮ ArchLinuxArm bootstrapping: https://github.com/kblin/rpi-cluster ◮ Ansible CTDB setup: https://github.com/kblin/rpi-ctdb-ansible ◮ This talk: http://kblin.org/talks/sambaxp/2016/talk.pdf Kai Blin CC-BY-SA 3.0 Cluster Briefcase (25 / 25)
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