ServerSetupCentOS7

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Revision as of 12:25, 26 February 2018 by Drew (talk | contribs) (update email address)
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This is the rebuilt lab configuration. The end goal is to use the old server (16GB RAM / 4x500GBHD RAID5 / Core2Quad) as a KVM hypervisor running a Foreman VM for provisioning services, test, and production VMs. It will also run DNS/mail/NFS/yum repos/hw monitoring at the hypervisor level. Foreman will have control over other compute resource on the network via qemu+ssh (other node 32GB RAM / nfs://drewserv/raid5 / core i7). This node will be used to stand up additional compute instances and docker containers when needed to house projects such as Jenkins farms, Chef, Salt, Ansible, and misc.

Initial Setup

Download CentOS7 DVD torrent

$ wget http://mirrors.rit.edu/centos/7/isos/x86_64/CentOS-7-x86_64-DVD-1511.torrent
$ sudo mkdir /var/www/html/centos
$ ctorrent CentOS-7-x86_64-DVD-1511.torrent

Loop back mount ISO to serve http

$ mount CentOS-7-x86_64-DVD-1511/CentOS-7-x86_64-DVD-1511.iso /var/www/html/centos

Download CentOS7 NetInstall ISO torrent

$ wget http://mirrors.rit.edu/centos/7/isos/x86_64/CentOS-7-x86_64-NetInstall-1511.torrent
$ ctorrent CentOS-7-x86_64-NetInstall-1511.torrent

Write the NetInstall ISO to a thumbdrive

$ dd if=CentOS-7-x86_64-NetInstall-1511/CentOS-7-x86_64-NetInstall-1511.iso of=/dev/sdc bs=1M

Write out the Kickstart for drewserv

cat /var/www/html/drewserv.cfg 

#version=DEVEL
# System authorization information
auth --enableshadow --passalgo=sha512
# Use network installation
url --url="http://192.168.1.124/centos/"

# Use graphical install - lame
graphical

# Run the Setup Agent on first boot to ensure it's not going to install over a disk in the array
firstboot --enable

ignoredisk --only-use=sda
# Keyboard layouts
keyboard --vckeymap=us --xlayouts='us'
# System language
lang en_US.UTF-8

# Network information
network  --bootproto=static --device=enp3s0 --ip=192.168.1.120 --netmask=255.255.255.0 --gateway=192.168.1.1 --nameserver=192.168.1.1 --activate
network  --hostname=drewserv.invadelabs.com

# Root password
rootpw --iscrypted $mycryptedpassword
# System services
services --enabled="chronyd"
# System timezone
timezone America/Denver
user --groups=wheel --name=drew --password=$mycryptedpassword --iscrypted --gecos="drew"

# video=1024x768 fixes lantronix spider
bootloader --append=" crashkernel=auto video=1024x768" --location=mbr --boot-drive=sda

autopart --type=lvm
# Partition clearing information
clearpart --none --initlabel

%packages
@^minimal
@core
chrony
kexec-tools
screen
wget
strace
tcpdump
rsync
mailx
logwatch
lsof
binutils
mcelog
sysstat
lldpad
lm_sensors
smartmontools
cyrus-sasl-plain
vim-enhanced
%end

%addon com_redhat_kdump --enable --reserve-mb='auto'

%end

Run the install

  • Boot the system with the with thumb drive.
  • Arrow down to Install and hit tab on the keyboard
  • Append to the line ks=http://192.168.1.124/drewserv.cfg
  • Reboot when prompted

Fix Lantronix Spider KVM for 1024x768 resolution

While plugged into the VGA port, the Lantronix Spider KVM sets the console resolution to 1600x1200. This can be annoying on a 1920x1080 panel. To resolve append video=1024x768 to the GRUM_CMDLINE_LINUX, update grub, and reboot. 

$ vi /etc/sysconfig/grub
GRUB_CMDLINE_LINUX="rd.md=0 rd.dm=0  KEYTABLE=us SYSFONT=True rd.luks=0 rd.lvm.lv=vg_drewserv/lv_drewserv LANG=en_US.UTF-8 rhgb quiet video=1024x768"

Update grub: 

# grub2-mkconfig -o /boot/grub2/grub.cfg

Set Hostname

nmcli general hostname drewserv.invadelabs.com

Syncrhonize Time and Allow clients from 192.168/24

Add port 

firewall-cmd --permanent --add-service=ntp
firewall-cmd --reload

Allow clients in /etc/chrony.conf; 

allow 192.168/16

Restart service 

systemctl restartchronyd

Verify on client (equiv ntpq -c) 

$ chronyc sources -v

Setup Postfix

Per: https://charlesauer.net/tutorials/centos/postfix-as-gmail-relay-centos.php

Also gmail needs to be configured to allow less secure apps: https://support.google.com/accounts/answer/6010255

Open port 

# firewall-cmd --permanent --add-port=25/tcp
# firewall-cmd --reload

Append to /etc/postfix/main.cf: 

relayhost = [smtp.gmail.com]:587
smtp_use_tls = yes
smtp_sasl_auth_enable = yes
smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd
smtp_tls_CAfile = /etc/ssl/certs/ca-bundle.crt
smtp_sasl_security_options = noanonymous
smtp_sasl_tls_security_options = noanonymous

mynetworks = 192.168.1.0/24, 127.0.0.0/8
inet_interfaces = all

Create /etc/postfix/sasl_passwd 

# echo "[smtp.gmail.com]:587 user:password" > /etc/postfix sasl_passwd
# postmap /etc/postfix sasl_passwd

Restart postfix 

systemctl restart postfix

Setup DNS

Quick guide: http://www.yoyoclouds.com/2015/01/quick-start-setup-centos-7-as-dns-server.html

Install bits; 

yum install bind bind-utils

/etc/named.conf

options {
	listen-on port 53 { 127.0.0.1; 192.168.1.120;};
	listen-on-v6 port 53 { ::1; };
	directory 	"/var/named";
	dump-file 	"/var/named/data/cache_dump.db";
	statistics-file "/var/named/data/named_stats.txt";
	memstatistics-file "/var/named/data/named_mem_stats.txt";
	allow-query     { localhost; 192.168.1.0/24;};
....
zone "invadelabs.com" IN {
type master;
file "forward.invadelabs";
allow-update { none; };
};
zone "1.168.192.in-addr.arpa" IN {
type master;
file "reverse.invadelabs";
allow-update { none; };
};

include "/etc/named.rfc1912.zones";
include "/etc/named.root.key";

/var/named/forward.invadelabs

$TTL 86400
@ IN SOA drewserv.invadelabs.com. root.invadelabs.com. (
             2011071001 ;Serial
             3600 ;Refresh
             1800 ;Retry
             604800 ;Expire
             86400 ;Minimum TTL
       )
@    IN     NS     drewserv.invadelabs.com.
drewserv       IN       A       192.168.1.120
drew-desktop       IN       A       192.168.1.125
foreman       IN       A       192.168.1.200
inv-vm01       IN       A       192.168.1.201
inv-vm02       IN       A       192.168.1.202
inv-vm03       IN       A       192.168.1.203
inv-vm04       IN       A       192.168.1.204
inv-vm05       IN       A       192.168.1.205
inv-vm06       IN       A       192.168.1.206

/var/named/reverse.invadelabs

$TTL 86400
@ IN SOA drewserv.invadelabs.com. root.invadelabs.com. (
             2011071001 ;Serial
             3600 ;Refresh
             1800 ;Retry
             604800 ;Expire
             86400 ;Minimum TTL
       )
@    IN     NS     drewserv.invadelabs.com.
@    IN     PTR   invadelabs.com
drewserv       IN       A       192.168.1.120
drew-desktop       IN       A       192.168.1.125
foreman       IN       A       192.168.1.200
inv-vm01       IN       A       192.168.1.201
inv-vm02       IN       A       192.168.1.202
inv-vm03       IN       A       192.168.1.203
inv-vm04       IN       A       192.168.1.204
inv-vm05       IN       A       192.168.1.205
inv-vm06       IN       A       192.168.1.206
120       IN     PTR   drewserv.invadelabs.com
125       IN     PTR   drew-desktop.invadelabs.com
200     IN     PTR   foreman.invadelabs.com
201     IN     PTR   inv-vm01.invadelabs.com
202     IN     PTR   inv-vm02.invadelabs.com
203     IN     PTR   inv-vm03.invadelabs.com
204     IN     PTR   inv-vm04.invadelabs.com
205     IN     PTR   inv-vm05.invadelabs.com
206     IN     PTR   inv-vm06.invadelabs.com

Add firewall and start named

# firewall-cmd --permanent --add-port=53/udp
# firewall-cmd --reload
# systemctl enable named
# systemctl start named

Setup rsyslog

In /etc/rsyslog.conf, make sure these are uncommented; 

# Provides UDP syslog reception
$ModLoad imudp
$UDPServerRun 514

# Provides TCP syslog reception
$ModLoad imtcp
$InputTCPServerRun 514

Open firewall ports; 

# firewall-cmd --permanent --add-port=514/tcp
# firewall-cmd --permanent --add-port=514/udp
# firewall-cmd --reload

Setup smartmontools

smartmontools installed via kickstart, default configuration is okay and the daemon automatically starts.

Setup mcelog

Only needed to `yum install mcelog` (handled by kickstart) and the service will be up and running.

Setup lm_sensors

Just run; 

# sensors-detect

Setup lldpad

Already installed via kickstart, just need to enable and start the daemon; 

# systemctl enable lldpad; systemctl start lldpad

Setup logwatch

Default logwatch automatically sends to root. I've added a /root/.forward containing my email address to get the messages.

Setup NFS

Can't afford a NAS, so we'll share this raid array with other white box hardware hypervisors. 

server centos7 https://www.howtoforge.com/nfs-server-and-client-on-centos-7
sudo yum install nfs-utils
systemctl enable rpcbind
systemctl enable nfs-server
systemctl start rpcbind
systemctl start nfs-server
systemctl start nfs-lock
systemctl start nfs-idmap
firewall-cmd --permanent --zone=public --add-service=nfs
firewall-cmd --reload

vi /etc/exports
/mnt/raid5    192.168.1.*(rw,sync,no_root_squash,no_all_squash)

ubuntu 15.10 client http://www.ubuntugeek.com/how-to-configure-nfs-server-and-client-configuration-on-ubuntu-15-04.html
sudo apt-get install portmap nfs-common
/etc/fstab
192.168.1.120:/mnt/raid5 /mnt/raid5 nfs rsize=8192,wsize=8192,timeo=14,intr
mount -a

Setup Samba

Setup the personal file share. 

[root@drewserv ~]# yum -y install samba

/etc/samba/smb.conf 

[global]
        workgroup = WORKGROUP
        server string = drewserv
	hosts allow = 127. 192.168.1.
        security = user
        passdb backend = tdbsam
        log file = /var/log/samba/log.%m
        max log size = 50
        load printers = no
        show add printer wizard = no
        printcap name = /dev/null
        disable spoolss = yes
[raid5]
        path = /mnt/raid5
        valid users = drew pbr
        read only = No
	create mode = 0665
	directory mode = 0775

Add to firewall 

# firewall-cmd --permanent --add-port=137/tcp --add-port=138/tcp --add-port=139/tcp --add-port=445/tcp
# firewall-cmd --reload

Enable and start service 

# systemctl enable smb; systemctl start smb

Add my user 

# smbpasswd -a drew
# smbpasswd -e drew

Setup selinux 

# ls -ldZ /mnt/raid5
# chcon -R -t public_content_rw_t /mnt/raid5
# restorecon -R -v /mnt/raid5
# setsebool -P samba_export_all_rw on
# getsebool -a | grep samba

^fix this

Install basic webserver to host repos/misc

yum -t install httpd
mv /etc/httpd/conf.d/welcome.conf /etc/httpd/conf.d/welcome.conf.old
firewall-cmd --permanent --add-port=80/tcp 
firewall-cmd --reload
systemctl enable httpd
systemctl start httpd

Setup CentOS7 DVD Repo

There is probably a cleaner way to do this, but will look into it later. 

# mkdir /var/www/html/centos7
# echo "/mnt/raid5/iso/CentOS-7-x86_64-DVD-1511.iso     /var/www/html/centos7   iso9660 loop 0 0" >> /etc/fstab
# mount -a

Setup libvirt / qemu-kvm

Stolen from http://www.server-world.info/en/note?os=CentOS_7&p=kvm

Install bits 

yum -y install qemu-kvm libvirt virt-install bridge-utils libguestfs-tools

Setup network bridge. Replace enp3s0 with device name. While connecting the bridge I lost network and had to go in through the kvm to finish the steps... Probably a cleaner way to do this, but trying to finish this today. 

nmcli c add type bridge autoconnect yes con-name br0 ifname br0
nmcli c modify br0 ipv4.method auto
nmcli c delete enp3s0
nmcli c add type bridge-slave autoconnect yes con-name enp3s0 ifname enp3s0 master br0
systemctl stop NetworkManager
systemctl start NetworkManager

Allow VNC

/etc/libvirt/qemu.conf 

diff qemu.conf.orig qemu.conf
12c12
< #vnc_listen = "0.0.0.0"
---
> vnc_listen = "0.0.0.0"
32c32
< #vnc_tls = 1
---
> vnc_tls = 0
517a518,519
> 
> secure_driver = "none"

Enable remote VNC fw rules

Per http://www.freeipa.org/page/Libvirt_with_VNC_Consoles 

firewall-cmd --permanent --add-service=libvirt
firewall-cmd --permanent --add-port=5900-5999/tcp
firewall-cmd --reload

Provision a VM

I'm going to be running the rest of my services as VMs provisioned through foreman and configured via puppet. The first VM was provisioned via virt-install with the instructions below and kickstart following.

Kickstart file for foreman vm

Kickstart file used to create inv-foreman01.cfg on hypervisor drewserv: 

#version=DEVEL
# System authorization information
auth --enableshadow --passalgo=sha512
# Use network installation
url --url="http://192.168.1.124/centos/"
# Use graphical install
graphical
# Run the Setup Agent on first boot
firstboot --enable
ignoredisk --only-use=sda
# Keyboard layouts
keyboard --vckeymap=us --xlayouts='us'
# System language
lang en_US.UTF-8

# Network information
network  --bootproto=dhcp --device=enp3s0 --ipv6=auto --activate
network  --hostname=localhost.localdomain

# Root password
rootpw --iscrypted $mycryptedpassword
# System services
services --enabled="chronyd"
# System timezone
timezone America/Denver --isUtc
user --groups=wheel --name=drew --password=$mycryptedpassword --iscrypted --gecos="drew"
# System bootloader configuration
bootloader --append=" crashkernel=auto" --location=mbr --boot-drive=sda
autopart --type=lvm
# Partition clearing information
clearpart --none --initlabel

%packages
@^minimal
@core
chrony
kexec-tools
sysstat
logwatch
mailx
rsync
strace
wget
tcpdump
deltarpm
screen
vim-enhanced
bind-utils
ntpdate
%end

%addon com_redhat_kdump --enable --reserve-mb='auto'

%end

reboot

Run virt-install

Adapted from https://raymii.org/s/articles/virt-install_introduction_and_copy_paste_distro_install_commands.html - the --location flag worked very well for this case.

  • Note provisioning CentOS7 only 512MB RAM would fail at disk partitioning in the kickstart.

Basic Instance with DHCP

Basic adaptation 

virt-install --name inv-foreman01 --ram 768 --vcpus=1 --arch=x86_64 --hvm --os-type=linux --nographics --disk path=/mnt/raid5/vm/inv-foreman01.img,size=15,sparse=true --network bridge=virbr0,model=virtio --location 'http://192.168.1.120/centos7/' --extra-args 'ks=http://192.168.1.120/inv-foreman01.cfg console=ttyS0,115200n8 serial'

Instance with Static IP

What I ended up going with on my network. ksdevice=eth0 had to be specified along with the network line modified in the kickstart for a static IP to be set in /etc/sysconfig/network-scripts/ifcfg-eth0: 

virt-install --name inv-foreman01 --ram 1024 --vcpus=2 --arch=x86_64 --hvm --os-type=linux --nographics --disk path=/mnt/raid5/vm/inv-foreman01.img,size=15,sparse=true --network bridge=br0,model=virtio --location 'http://192.168.1.120/centos7/' --extra-args 'ks=http://192.168.1.120/inv-foreman01.cfg --ip=192.168.1.200 --gateway=192.168.1.1 --netmask=255.255.255.0 --nameserver=192.168.1.1 --hostname=foreman ksdevice=eth0 console=ttyS0,115200n8 serial'

Alias to quickly destroy then re-run

I had to run through this about 20 times trying to figure out the 512MB ram issue. I wrote a quick alias to destroy, undefine, and remove the VM's disk image. 

# alias bla="virsh destroy inv-foreman01; virsh undefine inv-foreman01; rm -f /mnt/raid5/vm/inv-foreman01.img"

Setup Foreman

Foreman and puppet go great together. I will be using it to provision the rest of my services on small instances configured by puppet.

Setup firewall

Ports needed are 80, 443 for web ui. I believe 8443 is API. 8140 is puppet. tftp and 53/udp if doing pxeboot. 

# firewall-cmd --permanent --add-port=80/tcp
# firewall-cmd --permanent --add-port=443/tcp
# firewall-cmd --permanent --add-port=8443/tcp
# firewall-cmd --permanent --add-port=8140/tcp
# firewall-cmd --permanent --add-service=tftp
# firewall-cmd --permanent --add-port=53/udp
# firewall-cmd --reload

Setup repos and install

For EL7 we need EPEL and foreman's repo: 

rpm -ivh http://yum.puppetlabs.com/puppetlabs-release-el-7.noarch.rpm
yum -y install epel-release http://yum.theforeman.org/releases/1.10/el7/x86_64/foreman-release.rpm
yum -y install foreman-installer

Needed to do this for libvirt compute resource to work. If I rebuild I'll do this before running `foreman-install`, but after `yum -y install foreman-installer`. 

# yum install libvirt-client foreman-libvirt

Maybe these: 

yum install tfm-rubygem-foreman_cockpit
  • OpenSCAP?

Run foreman-install

The flags I ended up running with after a couple iterations. 

foreman-installer \
  --enable-foreman-proxy \
  --foreman-proxy-tftp=true \
  --foreman-proxy-tftp-servername=192.168.1.200 \
  --foreman-proxy-dhcp=false \
#  --foreman-proxy-dhcp-interface=eth0 \
#  --foreman-proxy-dhcp-gateway=192.168.1.1 \
#  --foreman-proxy-dhcp-range="192.168.1.210 192.168.1.220" \
#  --foreman-proxy-dhcp-nameservers="192.168.1.200" \
  --foreman-proxy-dns=true \
  --foreman-proxy-dns-interface=eth0 \
  --foreman-proxy-dns-zone=invadelabs.com \
  --foreman-proxy-dns-reverse=1.168.192.in-addr.arpa \
  --foreman-proxy-dns-forwarders=192.168.1.120 \
  --foreman-proxy-foreman-base-url=https://foreman.invadelabs.com \
  --enable-foreman-compute-ec2 \
  --enable-foreman-compute-libvirt \
  --enable-foreman-compute-openstack \
  --foreman-compute-libvirt-version \
  --foreman-compute-ec2-version \
  --foreman-admin-password myawesomepassword \
  --enable-foreman-plugin-bootdisk \
  --enable-foreman-plugin-dhcp-browser \
  --enable-foreman-plugin-discovery \
  --enable-foreman-plugin-docker \
  --enable-foreman-plugin-tasks
#--foreman-server-ssl-ca
#--foreman-server-ssl-cert
#--foreman-server-ssl-chain
#--foreman-server-ssl-crl
#--foreman-server-ssl-key

Automate this?

auto associate provisioning templates / partition tables, create subnets, domains, installation media, operating system, hostgroup, environment, classes, config group, compute resource, and compute profile --- in a series of hammer commands / api calls?

Enable qemu+ssh to kvm system

The system needs to be able to access the kvm/qemu hypervisor at qemu+ssh://192.168.1.120/system - SSH keys were used for this: 

root# mkdir /usr/share/foreman/.ssh
root# chmod 700 /usr/share/foreman/.ssh
root# chown foreman:foreman /usr/share/foreman/.ssh

root# su foreman -s /bin/bash
foreman$ ssh-keygen
foreman$ ssh-copy-id [email protected]
foreman$ ssh [email protected]

Drew1 Kickstart Default Template

Cloned the "Kickstart Default Template" since it would break failing to add epel and trying to download puppet. Cloning it to "Drew1 Kickstart Default Template" and ripping out some stuff add, added a %package list I wanted and setup EPEL in %post to rpm -Uvh the epl rpm then yum install uppet.

  • Todo Need to create an epel and centos-updates mirror to reduce bandwidth, also uncomment #yum -y update
<%#
kind: provision
name: Kickstart default
oses:
- CentOS 4
- CentOS 5
- CentOS 6
- CentOS 7
- Fedora 16
- Fedora 17
- Fedora 18
- Fedora 19
- Fedora 20
%>
<%#
This template accepts the following parameters:
- lang: string (default="en_US.UTF-8")
- selinux: string (default="enforcing")
- keyboard: string (default="us")
- time-zone: string (default="UTC")
- http-proxy: string (default="")
- http-proxy-port: string (default="")
- force-puppet: boolean (default=false)
- enable-puppetlabs-repo: boolean (default=false)
- salt_master: string (default=undef)
- ntp-server: string (default="0.fedora.pool.ntp.org")
- bootloader-append: string (default="nofb quiet splash=quiet")
%>
<%
  rhel_compatible = @host.operatingsystem.family == 'Redhat' && @host.operatingsystem.name != 'Fedora'
  os_major = @host.operatingsystem.major.to_i
  realm_compatible = (@host.operatingsystem.name == 'Fedora' && os_major >= 20) || (rhel_compatible && os_major >= 7)
  # safemode renderer does not support unary negation
  pm_set = @host.puppetmaster.empty? ? false : true
  proxy_uri = @host.params['http-proxy'] ? "http://#{@host.params['http-proxy']}:#{@host.params['http-proxy-port']}" : nil
  proxy_string = proxy_uri ? " --proxy=#{proxy_uri}" : ''
  puppet_enabled = pm_set || @host.params['force-puppet'] && @host.params['force-puppet'] == 'true'
  salt_enabled = @host.params['salt_master'] ? true : false
  chef_enabled = @host.respond_to?(:chef_proxy) && @host.chef_proxy
  section_end = (rhel_compatible && os_major <= 5) ? '' : '%end'
%>
install
<%= @mediapath %><%= proxy_string %>
lang <%= @host.params['lang'] || 'en_US.UTF-8' %>
selinux --<%= @host.params['selinux'] || 'enforcing' %>
keyboard <%= @host.params['keyboard'] || 'us' %>
skipx

<% subnet = @host.subnet -%>
<% if subnet.respond_to?(:dhcp_boot_mode?) -%>
<% dhcp = subnet.dhcp_boot_mode? && !@static -%>
<% else -%>
<% dhcp = !@static -%>
<% end -%>

network --bootproto <%= dhcp ? 'dhcp' : "static --ip=#{@host.ip} --netmask=#{subnet.mask} --gateway=#{subnet.gateway} --nameserver=#{[subnet.dns_primary, subnet.dns_secondary].select(&:syntaxhighlightsent?).join(',')}" %> --hostname <%= @host %><%= os_major >= 6 ? " --device=#{@host.mac}" : '' -%>

rootpw --iscrypted <%= root_pass %>
firewall --<%= os_major >= 6 ? 'service=' : '' %>ssh
authconfig --useshadow --passalgo=sha256 --kickstart
timezone --utc <%= @host.params['time-zone'] || 'UTC' %>
services --enabled=<%= os_major <= 6 ? 'ntpd' : 'chronyd' %>

bootloader --location=mbr --append="<%= @host.params['bootloader-append'] || 'nofb quiet splash=quiet' %>" <%= grub_pass %>

<% if @dynamic -%>
%include /tmp/diskpart.cfg
<% else -%>
<%= @host.diskLayout %>
<% end -%>

text
reboot

%packages
@core
<% if os_major <= 6 -%>
ntp
<% else -%>
chrony
<% end -%>
sysstat
logwatch
mailx
rsync
strace
wget
tcpdump
deltarpm
screen
vim-enhanced
bind-utils
ntpdate
%end

<% if @dynamic -%>
%syntaxhighlight
<%= @host.diskLayout %>
<%= section_end -%>
<% end -%>

%post --nochroot
exec < /dev/tty3 > /dev/tty3
#changing to VT 3 so that we can see whats going on....
/usr/bin/chvt 3
(
cp -va /etc/resolv.conf /mnt/sysimage/etc/resolv.conf
/usr/bin/chvt 1
) 2>&1 | tee /mnt/sysimage/root/install.postnochroot.log
<%= section_end -%>

%post
logger "Starting anaconda <%= @host %> postinstall"
exec < /dev/tty3 > /dev/tty3
#changing to VT 3 so that we can see whats going on....
/usr/bin/chvt 3
(
<% if subnet.respond_to?(:dhcp_boot_mode?) -%>
<%= snippet 'kickstart_networking_setup' %>
<% end -%>

#update local time
echo "updating system time"
/usr/sbin/ntpdate -sub <%= @host.params['ntp-server'] || '0.fedora.pool.ntp.org' %>
/usr/sbin/hwclock --systohc

# update all the base packages from the updates repository
#yum -t -y -e 0 update

# setup puppet
<% if puppet_enabled %>
echo "Configuring puppet"
su -c 'rpm -Uvh <%= @host.os.medium_uri(@host, "http://dl.fedoraproject.org/pub/epel/epel-release-latest-#{@host.operatingsystem.major}.noarch.rpm") %>'
yum -y --nogpgcheck install puppet
cat > /etc/puppet/puppet.conf << EOF
<%= snippet 'puppet.conf' %>
EOF

# Setup puppet to run on system reboot
/sbin/chkconfig --level 345 puppet on

/usr/bin/puppet agent --config /etc/puppet/puppet.conf -o --tags no_such_tag <%= @host.puppetmaster.blank? ? '' : "--server #{@host.puppetmaster}" %> --no-daemonize
<% end -%>


sync

# Inform the build system that we are done.
echo "Informing Foreman that we are built"
wget -q -O /dev/null --no-check-certificate <%= foreman_url %>
) 2>&1 | tee /root/install.post.log
exit 0

<%= section_end -%>

Added to puppet.conf snippet

append to /etc/puppet/puppet.conf: 

runinterval     = 600
disable_warnings = desyntaxhighlightcations
show_diff       = true

Issue with Foreman + VNC on KVM

It would be nice to get this working in the web ui, but it's not a nescity as you can just go to the console page, get the password, and VNC to the system with that password. 

noVNC ready: native WebSockets, canvas rendering 
Connect timeout
WebSock error: [object Event]

Questions / things to hack on

Feature request: Instead of using VNC or SPICE, why not add in a mechnaism that will do something similar to virsh edit <vm> like in "Provision KVM without DHCP"?

Provisioning VMs with Foreman

If I didn't already have a dhcp server on the network and left enable-dhcp on foreman-install, when going to create a new host it would automatically PXE boot and install. This worked well until my foreman dhcp and router dhcp servers started clashing. I didn't want to think of fancy ways to firewall off dhcp traffic or vlan my lab from the home network.

Provision KVM without DHCP

Following "Provision KVM without DHCP" from http://projects.theforeman.org/projects/foreman/wiki/Provision_KVM_VM_without_DHCP - now I create the new host powered off and then do a

  1. virsh edit inv-vm01.invadelabs.com

replacing the os lines with something similar to, noting the location of the vmlinuz & initrd.img. Looks the same as using --location in virt-install ;) 

  <os>
    <type arch='x86_64' machine='pc-i440fx-rhel7.0.0'>hvm</type>
    <kernel>/var/www/html/centos7/images/pxeboot/vmlinuz</kernel>
    <initrd>/var/www/html/centos7/images/pxeboot/initrd.img</initrd>
    <cmdline>ks=http://foreman.invadelabs.com/unattended/provision?static=yes ksdevice=bootif network kssendmac ip=192.168.1.201 netmask=255.255.255.0 gateway=192.168.1.1 dns=192.168.1.120</cmdline>
    <boot dev='hd'/>
  </os>

After the machine is provisioned, shut it down,do a `virsh edit inv-vm01.invadelabs.com`, and remove these lines 

    <kernel>/var/www/html/centos7/images/pxeboot/vmlinuz</kernel>
    <initrd>/var/www/html/centos7/images/pxeboot/initrd.img</initrd>
    <cmdline>ks=http://foreman.invadelabs.com/unattended/provision?static=yes ksdevice=bootif network kssendmac ip=192.168.1.201 netmask=255.255.255.0 gateway=192.168.1.1 dns=192.168.1.120</cmdline>

Template Debugging

You can see what the fully rendered kickstart template looks like by going to a URL similar to the following, replacing spoof=192.168.1.204 with the hosts IP: https://192.168.1.200/unattended/provision?spoof=192.168.1.204

Sample Output: 

install
url --url http://192.168.1.120/centos7
lang en_US.UTF-8
selinux --enforcing
keyboard us
skipx

network --bootproto static --ip=192.168.1.204 --netmask=255.255.255.0 --gateway=192.168.1.1 --nameserver=192.168.1.120,192.168.1.1 --hostname inv-vm04.invadelabs.com --device=52:54:00:88:cb:7f
rootpw --iscrypted $5$enIGOzxN$.hP1.rVeGTuV1pdGkyFrlxbwynzTr1LvHVtZcB7uPS6
firewall --service=ssh
authconfig --useshadow --passalgo=sha256 --kickstart
timezone --utc UTC
services --enabled="chronyd"

bootloader --location=mbr --append="nofb quiet splash=quiet" 

zerombr
clearpart --all --initlabel
autopart

text
reboot

%packages
@^minimal
@core
chrony
sysstat
logwatch
mailx
rsync
strace
wget
tcpdump
deltarpm
screen
vim-enhanced
bind-utils
ntpdate
%end

%post --nochroot
exec < /dev/tty3 > /dev/tty3
#changing to VT 3 so that we can see whats going on....
/usr/bin/chvt 3
(
cp -va /etc/resolv.conf /mnt/sysimage/etc/resolv.conf
/usr/bin/chvt 1
) 2>&1 | tee /mnt/sysimage/root/install.postnochroot.log
%end
%post
logger "Starting anaconda inv-vm04.invadelabs.com postinstall"
exec < /dev/tty3 > /dev/tty3
#changing to VT 3 so that we can see whats going on....
/usr/bin/chvt 3
(
#  interface
real=`ip -o link | grep 52:54:00:88:cb:7f | awk '{print $2;}' | sed s/:$//`

# ifcfg files are ignored by NM if their name contains colons so we convert colons to underscore
sanitized_real=$real

cat << EOF > /etc/sysconfig/network-scripts/ifcfg-$sanitized_real
BOOTPROTO="none"
IPADDR="192.168.1.204"
NETMASK="255.255.255.0"
GATEWAY="192.168.1.1"
DEVICE="$real"
HWADDR="52:54:00:88:cb:7f"
ONBOOT=yes
PEERDNS=yes
PEERROUTES=yes
EOF

#update local time
echo "updating system time"
/usr/sbin/ntpdate -sub 0.fedora.pool.ntp.org
/usr/sbin/hwclock --systohc

# update all the base packages from the updates repository
#yum -t -y -e 0 update

# setup puppet

echo "Configuring puppet"
su -c 'rpm -Uvh http://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm'
yum -y --nogpgcheck install puppet
cat > /etc/puppet/puppet.conf << EOF

[main]
vardir = /var/lib/puppet
logdir = /var/log/puppet
rundir = /var/run/puppet
ssldir = \$vardir/ssl

[agent]
pluginsync      = true
report          = true
ignoreschedules = true
daemon          = false
ca_server       = foreman.invadelabs.com
certname        = inv-vm04.invadelabs.com
environment     = production
server          = foreman.invadelabs.com
runinterval     = 600
disable_warnings = desyntaxhighlightcations

EOF

# Setup puppet to run on system reboot
/sbin/chkconfig --level 345 puppet on

/usr/bin/puppet agent --config /etc/puppet/puppet.conf -o --tags no_such_tag --server foreman.invadelabs.com --no-daemonize

sync

# Inform the build system that we are done.
echo "Informing Foreman that we are built"
wget -q -O /dev/null --no-check-certificate http://foreman.invadelabs.com:80/unattended/built?token=632dca5e-5693-4b6a-bac9-36fe64a41519
) 2>&1 | tee /root/install.post.log
exit 0

%end

Puppet Modules

Puppet modules I've added to my "production" config group and host groups.

puppetlabs/motd

Install motd: 

[drew@foreman ~]$ sudo puppet module install -i /etc/puppet/environments/production/modules puppetlabs/motd
[sudo] password for drew:
Notice: syntaxhighlightparing to install into /etc/puppet/environments/production/modules ...
Notice: Downloading from https://forgeapi.puppetlabs.com ...
Notice: Installing -- do not interrupt ...
/etc/puppet/environments/production/modules
└─┬ puppetlabs-motd (v1.4.0)
  └─┬ puppetlabs-registry (v1.1.3)
    └── puppetlabs-stdlib (v4.11.0)

Modify motd.erb: 

[root@foreman templates]# vi /etc/puppet/environments/production/modules/motd/templates/motd.erb
-------------------------------------------------------------------------
This system is managed by puppet master <%= puppetmaster %>.
-------------------------------------------------------------------------
Name: <%= hostname %>.invadelabs.com
IP: <%= ipaddress %>
Netmask: <%= netmask %>
MAC: <%= macaddress %>
Location: <%= location %>
Built By: <%= owner_email %>

<%= productname %>
Architecture: <%= architecture %>
UUID: <%= uuid %>
Serial#: <%= serialnumber %>
CPU: <%= physicalprocessorcount %>x <%= processor0 %> Socket(s)
OS: <%= operatingsystem %> Enterprise Linux <%= operatingsystemmajrelease %>
RAM: <%= memorytotal %>
SElinux: <%= selinux_current_mode %>
Timezone: <%= timezone %>
-------------------------------------------------------------------------

ringingliberty/chrony

For EL7, set smart parameter in foreman ui "servers" to Array and ['192.168.1.120'] 

[root@foreman modules]# sudo puppet module install -i /etc/puppet/environments/production/modules ringingliberty/chrony
Notice: syntaxhighlightparing to install into /etc/puppet/environments/production/modules ...
Notice: Downloading from https://forgeapi.puppetlabs.com ...
Notice: Installing -- do not interrupt ...
/etc/puppet/environments/production/modules
└─┬ ringingliberty-chrony (v0.2.1)
  └── puppetlabs-stdlib (v4.11.0)

puppetlabs/ntp

For EL6, set smart parameter in foreman ui "servers" to Array and ['192.168.1.120'] 

[root@foreman ~]# sudo puppet module install -i /etc/puppet/environments/production/modules puppetlabs-ntp
Notice: syntaxhighlightparing to install into /etc/puppet/environments/production/modules ...
Notice: Downloading from https://forgeapi.puppetlabs.com ...
Notice: Installing -- do not interrupt ...
/etc/puppet/environments/production/modules
└─┬ puppetlabs-ntp (v4.1.2)
  └── puppetlabs-stdlib (v4.11.0)

deric/accounts

Set JSON paramter in foreman UI for accounts::users 

{  
  "drew":{  
    "uid":1001,
    "gid":1001,
    "shell":"/bin/bash",
    "groups":"wheel",
    "pwhash":"$6$6387KljVTcBSUe6U$pfLTBdCJsFsM.XrkH68yNmvxJkDJtycnjrPi2NJAoxbtjS3fMNT/COgX0nn6y6XOgpAB8LizsFTSKkHjX3UqR1",
    "comment":"Drew User",
    "ssh_key":{  
      "type":"ssh-rsa",
      "key":"AAAAB3NzaC1yc2EAAAABJQAAAQEAsZeKEXj+5Is6OXLDEWDhRb51lNZj2hQRUCCMIcYtjzEbkgpEH7b5x6d5vg2uZy5uc0INrTW4Fy5Z/A5t+cTf+SfT5oGjMjQQ5f5ShA+RsOuB5gI+2b1eyyGBOcgJxjqgDKakc10OKssPJS1qk/NvWQoDOzBRGO0Vgy5a9fizyDcR0rRD0dqmV/Fly3SEHLHkMZDENYL2h5icHoZ9j/r8qqkMCKBpKY9ysVRIQERmDZT+qKoShNUj5b4dBv5csk3TJnMyoFIBL9P7wBJUEFSir3O2whNc+OtcqTVxqrCqdOAcGheFFxW4O907ncckfTxRKB+6WfWcb80BLn+6Avfetw==",
      "comment":"[email protected]"
    }
  }
}

Module install notes: 

[root@foreman modules]# sudo puppet module install -i /etc/puppet/environments/production/modules deric/accounts
Notice: syntaxhighlightparing to install into /etc/puppet/environments/production/modules ...
Notice: Downloading from https://forgeapi.puppetlabs.com ...
Notice: Installing -- do not interrupt ...
/etc/puppet/environments/production/modules
└─┬ deric-accounts (v1.2.0)
  └── puppetlabs-stdlib (v4.11.0)

nrvale0/postfix

Set paramters postfix::relayhost = drewserv.invadelabs.com

Module install notes: 

[root@foreman modules]# sudo puppet module install -i /etc/puppet/environments/production/modules nrvale0/postfix
Notice: syntaxhighlightparing to install into /etc/puppet/environments/production/modules ...
Notice: Downloading from https://forgeapi.puppetlabs.com ...
Notice: Installing -- do not interrupt ...
/etc/puppet/environments/production/modules
└─┬ nrvale0-postfix (v2.1.0)
  ├── nrvale0-multi_validate_re (v0.1.1)
  └── puppetlabs-stdlib (v4.11.0)

saz/resolv_conf

Set paramaters: 

resolv_conf::searchpath array ['invadelabs.com']
resolv_conf::nameservers array ['192.168.1.120']

Installed module with 

[root@foreman modules]# sudo puppet module install -i /etc/puppet/environments/production/modules saz/resolv_conf
Notice: syntaxhighlightparing to install into /etc/puppet/environments/production/modules ...
Notice: Downloading from https://forgeapi.puppetlabs.com ...
Notice: Installing -- do not interrupt ...
/etc/puppet/environments/production/modules
└─┬ saz-resolv_conf (v3.0.5)
  └── puppetlabs-stdlib (v4.11.0)

drewderivative/dotforward

Quick module I wrote to add an entry to /root/.forward to be available as parameter in Foreman.

Set dotforward::forwardemail to '[email protected]'

Create module from scratch; 

# cd /etc/puppet/environments/production/modules
# puppet module generate drewderivative-dotforward
# mv drewderivative-dotfoward dotforward

mainfests/init.pp 

# == Class: dotforward
#
# Full description of class dotforward here.
#
class dotforward (
  $forwardemail = undef,
) {

  if $forwardemail {
    file { '/root/.forward':
      ensure => file,
      content => $forwardemail,
    }
  }

}

ghoneycutt/ssh

Set smart parameter "permit root login" = "no"

Module install notes: 

[root@foreman modules]#  sudo puppet module install -i /etc/puppet/environments/production/modules ghoneycutt/ssh
Notice: syntaxhighlightparing to install into /etc/puppet/environments/production/modules ...
Notice: Downloading from https://forgeapi.puppetlabs.com ...
Notice: Installing -- do not interrupt ...
/etc/puppet/environments/production/modules
└─┬ ghoneycutt-ssh (v3.34.0)
  ├── ghoneycutt-common (v1.5.0)
  ├── puppetlabs-firewall (v1.7.2)
  └── puppetlabs-stdlib (v4.11.0)

ghoneycutt/rsyslog

Smart Parameters set as JSON, but just grabbing yaml for refrence: 

  rsyslog:
    kernel_target: /dev/console
    log_server:
    - drewserv.invadelabs.com
    remote_logging: true

Module install: 

[root@foreman modules]# sudo puppet module install -i /etc/puppet/environments/production/modules ghoneycutt/rsyslog
Notice: syntaxhighlightparing to install into /etc/puppet/environments/production/modules ...
Notice: Downloading from https://forgeapi.puppetlabs.com ...
Notice: Installing -- do not interrupt ...
/etc/puppet/environments/production/modules
└─┬ ghoneycutt-rsyslog (v0.23.0)
  ├── ghoneycutt-common (v1.5.0)
  ├── ghoneycutt-sysklogd (v1.0.1)
  └── puppetlabs-stdlib (v4.11.0)

saz/timezone

Smart parameter timezone=>America/Denver 

[root@foreman ~]#  puppet module install -i /etc/puppet/environments/production/modules saz/timezone
Notice: syntaxhighlightparing to install into /etc/puppet/environments/production/modules ...
Notice: Downloading from https://forgeapi.puppetlabs.com ...
Notice: Installing -- do not interrupt ...
/etc/puppet/environments/production/modules
└─┬ saz-timezone (v3.3.0)
  └── puppetlabs-stdlib (v4.11.0)

sgnl05/colorprompt

Easy way to color root and per individual bash prompts. Liked the defaults. 

[root@foreman modules]# puppet module install -i /etc/puppet/environments/production/modules sgnl05/colorprompt
Notice: syntaxhighlightparing to install into /etc/puppet/environments/production/modules ...
Notice: Downloading from https://forgeapi.puppetlabs.com ...
Notice: Installing -- do not interrupt ...
/etc/puppet/environments/production/modules
└─┬ sgnl05-colorprompt (v2.1.1)
  └── puppetlabs-stdlib (v4.11.0)

LDAP Login Module configuration

These three modules work well together in Foreman to setup SSSD with just parameters, provided lines 363-369 are commented out in yguenane/authconfig. 

walkamongus/sssd-1.2.0
yguenane/authconfig-0.6.0
trlinkin/nsswitch-1.2.0

Other Foreman Friendly Modules

These have worked well for some of my client use cases, but I'm not using snmp or setting ulimits at home. 

razorsedge-snmp-3.5.0
erwbgy-limits-0.3.1

YAML

Putting it all together: 

---
classes:
  accounts:
    users:
      drew:
        uid: 1001
        gid: 1001
        shell: /bin/bash
        groups: wheel
        pwhash: $6longprivatehashedpassword
        comment: Drew User
        ssh_key:
          type: ssh-rsa
          key: AAAAB.....longprivatekey
          comment: [email protected]
  chrony:
    servers:
    - drewserv.invadelabs.com
  colorprompt: 
  dotforward:
    forwardemail: [email protected]
  motd: 
  postfix:
    relayhost: drewserv.invadelabs.com
  rsyslog:
    kernel_target: /dev/null
    log_server:
    - drewserv.invadelabs.com
    remote_logging: true
  ssh:
    permit_root_login: 'no'
  timezone:
    timezone: America/Denver

Further interests

  • Deploying jenkins farm
  • Write module to create /mnt/raid5 directory, mount nfs.
  • Monitor + auto registration / deregistration with something like zabbix/icinga/nagios
  • Cassandra
  • collectd
  • /etc/hosts
  • selenium
  • gitlab
  • pam

To-do

How to unregister from services (like monitoring) when destroying? ** Researching plugin foreman hooks

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