From 6c281e5a6ca2b32e199d08d68c29c543264f36c4 Mon Sep 17 00:00:00 2001 From: Randy Bush Date: Sat, 4 Jul 2020 14:55:25 -0700 Subject: [PATCH] from wiki --- pages/GanetiMD.md | 349 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 349 insertions(+) create mode 100644 pages/GanetiMD.md diff --git a/pages/GanetiMD.md b/pages/GanetiMD.md new file mode 100644 index 0000000..0a8f3f5 --- /dev/null +++ b/pages/GanetiMD.md @@ -0,0 +1,349 @@ +# Build a Software RAID5 Based Debian/Ganeti System only on a non-UEFI System + +**NOTE: this will not work on a UEFI capable system. It will fail at grub installation.** Try [This recipie instead.](https://wiki.rg.net/wiki/DebianRAIDGaneti) + +## Install Debian + +- Before install, it is wise to disable DHCP service so one can manuall set the system IP data +- Boot Debian CD/ISO +- Choose Install +- Choose English, UK (so you can get UCT) +- Choose American English +- Name the host +- Select the Ethernet interface to be used +- Configure Ethernet IP Address, Netmask, Gateway, and DNS Service +- Configure Hostname and Domain Name +- Choose root password +- Choose user name and password +- Partition Disks + - Choose Manual Partitioning + - Select the first drive + - Create a new empty partition table + - Select each of the other Drives and Create a new empty partition table + - Configure Software RAID + - Write Changes and Configure RAID + - Create MD Device + - Select RAID5 + - Number of Devices should be all the drives you have + - Number of Spare Drives is 0 + - Select all the drives and continue + - Write the changes and configure RAID + - Finish +- Configure LVM + - Configure LVM accepting write changes to disks + - Create volume group + - Volume group name: ganeti + - Devices for the new volume group: select /dev/md0 + - Keep partioning and write + - Create Logical Volume: on ganeti, root, 16G + - Create Logical Volume: on ganeti, swap, 16G + - Create Logical Volume: on ganeti, var, 16G + - Finish + - Edit the Logical Volumes to be ext4 /, swap, and ext4 /var + - Finish partitioning and write changes +- Finish partitioning and write changes to disk +- Debian will now install and you will do the normal mirror selection etc. +- Only install SSH Server and Debian Utilities +- Install GRUB +- Be sure it will not boot CD-ROM, and Reboot from the installed system + +## Finish Debian Installation + +Install homey things (it's not a computer without emacs:) + +``` +apt-get update +apt-get upgrade +apt-get install emacs23-nox rsync gcc bridge-utils vlan sudo unbound +usermod -G sudo -a randy +``` + +Copy root's credentials and dot-files from a known system + +Fix `/etc/ssh/sshd_config` to forbid passwords + +``` +PermitRootLogin without-password +``` + +And restart the ssh daemon + +``` +service ssh restart +``` + +Fix hostname + +``` +echo vm3.dfw.rg.net > /etc/hostname +hostname `cat /etc/hostname` +``` + +Fix /etc/unbound/unbound.conf + +``` + access-control: 127.0.0.0/8 allow + access-control: 198.180.152.0/24 allow + access-control: 0.0.0.0/0 refuse + access-control: ::1 allow + access-control: ::ffff:127.0.0.1 allow + access-control: 2001:deb::/48 + access-control: ::0/0 refuse +``` + +And restart unbound + +``` +service unbound restart +``` + +Clean up from CDROM sources + +``` +vi /etc/apt/sources.list +``` + +and delete the two CDROM entries at the top + +### Make ISO FileSystem + +``` +lvcreate -n ISOs -L 128G ganeti +mkdir /ISOs +mkfs /dev/mapper/ganeti-ISOs +``` + +and then add it to /etc/fstab + +``` +/dev/mapper/ganeti/ISOs /ISOs ext4 defaults 0 2 +``` + +and then you can mount it + +``` +mount /ISOs +``` + +### Unattended Upgrades, syslog-NG, etc. + +[Install Unattended Upgrading](https://wiki.rg.net/wiki/UbuntuAutoUpgrade) + +Install syslog-ng + +``` +apt-get install syslog-ng +``` + +Hack /etc/logrotate.d/syslog-ng + +``` +*** /etc/logrotate.d/syslog-ng~ 2013-03-20 17:30:26.000000000 +0000 +--- /etc/logrotate.d/syslog-ng 2014-07-31 14:00:08.148813531 +0100 +*************** +*** 29,34 **** +--- 29,36 ---- + missingok + notifempty + compress ++ mailfirst ++ mail randy@psg.com + delaycompress + sharedscripts + postrotate +``` + +Fix Exim + +``` +dpkg-reconfigure exim4-config +``` + +Use internet mail + System name is vm0.bknix.co.th + Only listen on local interfaces + Relay mail for noone + +## Debian Ganeti Specific Configuration + +Edit /etc/hosts to have the real address of the host, e.g. + +``` +127.0.0.1 localhost +198.180.152.30 vm0.dfw.rg.net vm0 +198.180.152.31 vm1.dfw.rg.net vm1 +198.180.152.32 vm2.dfw.rg.net vm2 +198.180.152.33 vm3.dfw.rg.net vm3 +198.180.152.100 gnt0.dfw.rg.net gnt0 +``` + +### Fix /etc/network/interfaces + +Make eth0 hang off of whatever your bridge will be called + +``` +# This file describes the network interfaces available on your system +# and how to activate them. For more information, see interfaces(5). + +# The loopback network interface +auto lo +iface lo inet loopback + +# The primary network interface +auto eth0 +iface eth0 inet manual + +auto br-lan +iface br-lan inet static + address 198.180.152.30 + netmask 255.255.255.192 + gateway 198.180.152.1 + dns-nameservers 127.0.0.1 198.180.152.11 147.28.0.35 + dns-search psg.com rg.net rpki.net + bridge_ports eth0 + bridge_stp off + bridge_fd 0 + bridge_maxwait 0 + +iface br-lan inet6 static + address 2001:418:3807::30 + netmask 64 + gateway 2001:418:3807::1 + +auto eth1 +iface eth1 inet manual + +auto br-hack +iface br-hack inet static + address 10.0.0.100 + netmask 255.255.255.0 + bridge_ports eth1 + bridge_stp off + bridge_fd 0 + bridge_maxwait 0 +``` + +Check /etc.resolv.comf + +In theory, this looks like + +``` + -------------+-------------- + | + br-lan + | this host + +---------+---------+ + | | + | eth0 | + | | + +--------+----------+ + | + br-hack + | + +------> to other ganeti hosts +``` + +## Install Ganeti + +Set up to get Ganeti from backports on all three servers, vm0, vm1, and vm2 + +``` +cat >> /etc/apt/sources.list.d/wheezy-backports.list +deb http://cdn.debian.net/debian/ wheezy-backports main +``` + +And then install it on all three servers + +``` +apt-get update +apt-get install ganeti/wheezy-backports +``` + +Fix up drbd + +``` +echo "options drbd minor_count=128 usermode_helper=/bin/true" > /etc/modprobe.d/drbd.conf +rmmod drbd # ignore any error +modprobe drbd +``` + +### Initialize and Build Ganeti Cluster + +Only on the master node of the cluster + +``` +gnt-cluster init \ + --master-netdev=br-lan \ + --enabled-hypervisors=kvm \ + -H kvm:kernel_path="",initrd_path="" \ + --vg-name=ganeti \ + -N link=br-hack \ + -s 10.0.0.103 \ + gnt0.dfw.rg.net +``` + +If it barfs, try + +``` +gnt-cluster destroy --yes-do-it +``` + +then re-run gnt-cluster init ... + +If you get into gnutls problems check apt-get upgrade and dist-upgrade + +### Check That Cluster is Happy + +Fix VNC passwording + +``` +echo 'salad-daze' > /etc/ganeti/vnc-cluster-password +gnt-cluster modify -H kvm:vnc_password_file=/etc/ganeti/vnc-cluster-password +``` + +Test that the cluster was built happily + +``` +gnt-cluster verify +``` + +If you get + +``` +Fri Mar 14 05:20:55 2014 - ERROR: node deb64.psg.com: volume ganeti/root is unknown +Fri Mar 14 05:20:55 2014 - ERROR: node deb64.psg.com: volume ganeti/swap is unknown +Fri Mar 14 05:20:55 2014 - ERROR: node deb64.psg.com: volume ganeti/var is unknown +``` + +That's OK. To make it go away + +``` +gnt-cluster modify --reserved-lvs=ganeti/root,ganeti/swap,ganeti/var +``` + +## Add Nodes to Cluster + +Now add vm1, vm2, and vm3 to the cluster by the following on vm0 + +``` +gnt-node add -s 10.0.0.101 vm1 +gnt-node add -s 10.0.0.102 vm2 +gnt-node add -s 10.0.0.103 vm3 +``` + +which should result in + +``` +vm0.dfw.rg.net:/root# gnt-node add -s 10.0.0.103 vm3 +-- WARNING -- +Performing this operation is going to replace the ssh daemon keypair +on the target machine (vm3.dfw.rg.net) with the ones of the current one +and grant full intra-cluster ssh root access to/from it + +The authenticity of host 'vm3.dfw.rg.net (198.180.152.33)' can't be established. +ECDSA key fingerprint is 04:31:79:b1:32:3b:6e:60:33:65:67:0f:76:9a:5a:36. +Are you sure you want to continue connecting (yes/no)? yes +Warning: Permanently added 'vm3.dfw.rg.net' (ECDSA) to the list of known hosts. +Restarting OpenBSD Secure Shell server: sshd. +Sat Mar 21 22:25:47 2015 - INFO: Node will be a master candidate +``` \ No newline at end of file