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Monthly Archives: March 2017

How to Install Your Own Cloud Platform with OpenStack inCentOS 7

02 Mar

OpenStack is a free and open-source software platform which provides IAAS (infrastructure-as-a-service) for public and private clouds.

To configure hostname:

[root@cloud ~]# hostname
cloud.openstack.lan
[root@cloud ~]# hostname -f
cloud.openstack.lan
[root@cloud ~]# hostname -s
cloud

To check all running services:
[root@cloud ~]# ss -tulpn
Netid State Recv-Q Send-Q Local Address:Port Peer Address:Po rt
udp UNCONN 0 0 127.0.0.1:323 *:* users:((“chronyd”,pid=618,fd=1))
udp UNCONN 0 0 *:5353 *:* users:((“avahi-daemon”,pid=643,fd=12))
udp UNCONN 0 0 *:55073 *:* users:((“avahi-daemon”,pid=643,fd=13))
udp UNCONN 0 0 ::1:323 :::* users:((“chronyd”,pid=618,fd=2))
tcp LISTEN 0 128 *:111 *:* users:((“systemd”,pid=1,fd=50))
tcp LISTEN 0 128 *:22 *:* users:((“sshd”,pid=12309,fd=3))
tcp LISTEN 0 128 127.0.0.1:631 *:* users:((“cupsd”,pid=742,fd=12))
tcp LISTEN 0 100 127.0.0.1:25 *:* users:((“master”,pid=1432,fd=13))
tcp LISTEN 0 128 :::111 :::* users:((“systemd”,pid=1,fd=49))
tcp LISTEN 0 128 :::22 :::* users:((“sshd”,pid=12309,fd=4))
tcp LISTEN 0 128 ::1:631 :::* users:((“cupsd”,pid=742,fd=11))

To stop, disable or remove unwanted services:
[root@cloud ~]# systemctl stop postfix firewalld NetworkManager
[root@cloud ~]# systemctl disable postfix
[root@cloud ~]# systemctl disable firewalld
[root@cloud ~]# systemctl disable NetworkManager
[root@cloud ~]# systemctl mask NetworkManager
Created symlink from /etc/systemd/system/NetworkManager.service to /dev/null.
[root@cloud ~]# yum remove postfix NetworkManager NetworkManager-libnm

To disable Selinux:

[root@cloud ~]# vi /etc/selinux/config

enforcing to disabled

To install ntp for synchronize time with a NTP server

[root@cloud ~]# yum install ntpdate
Loaded plugins: fastestmirror, langpacks
Loading mirror speeds from cached hostfile
* base: centos.excellmedia.net
* extras: centos.excellmedia.net
* updates: centos.excellmedia.net
Resolving Dependencies
–> Running transaction check
—> Package ntpdate.x86_64 0:4.2.6p5-25.el7.centos will be updated
–> Processing Dependency: ntpdate = 4.2.6p5-25.el7.centos for package: ntp-4.2.6p5-25.el7.centos.x86_64
—> Package ntpdate.x86_64 0:4.2.6p5-25.el7.centos.1 will be an update
–> Running transaction check
Complete!

To Install OpenStack in CentOS:

[root@cloud ~]# yum install https://www.rdoproject.org/repos/rdo-release.rpm
Loaded plugins: fastestmirror, langpacks
rdo-release.rpm | 5.2 kB 00:00:00
Examining /var/tmp/yum-root-VZ95CL/rdo-release.rpm: rdo-release-newton-4.noarch
Marking /var/tmp/yum-root-VZ95CL/rdo-release.rpm to be installed
Resolving Dependencies
–> Running transaction check
—> Package rdo-release.noarch 0:newton-4 will be installed
–> Finished Dependency Resolution

Dependencies Resolved

=========================================================================================================
Package Arch Version Repository Size
=========================================================================================================
Installing:
rdo-release noarch newton-4 /rdo-release 3.2 k

Transaction Summary
=========================================================================================================
Install 1 Package

Total size: 3.2 k
Installed size: 3.2 k
Is this ok [y/d/N]: y
Downloading packages:
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
Installing : rdo-release-newton-4.noarch 1/1
Verifying : rdo-release-newton-4.noarch 1/1

Installed:
rdo-release.noarch 0:newton-4

Complete!

[root@cloud ~]# yum install -y centos-release-openstack-mitaka
Loaded plugins: fastestmirror, langpacks
openstack-newton | 2.9 kB 00:00:00
rdo-qemu-ev | 2.9 kB 00:00:00
(1/2): rdo-qemu-ev/x86_64/primary_db | 52 kB 00:00:01
(2/2): openstack-newton/x86_64/primary_db | 854 kB 00:00:08
Loading mirror speeds from cached hostfile
* base: centos.excellmedia.net
* extras: centos.excellmedia.net
* updates: centos.excellmedia.net
Resolving Dependencies
–> Running transaction check
—> Package centos-release-openstack-mitaka.noarch 0:1-5.el7 will be installed
–> Processing Dependency: centos-release-qemu-ev for package: centos-release-openstack-mitaka-1-5.el7.noarch
–> Processing Dependency: centos-release-ceph-hammer for package: centos-release-openstack-mitaka-1-5.el7.noarch
–> Running transaction check
—> Package centos-release-ceph-hammer.noarch 0:1.0-5.el7.centos will be installed
–> Processing Dependency: centos-release-storage-common for package: centos-release-ceph-hammer-1.0-5.el7.centos.noarch
—> Package centos-release-qemu-ev.noarch 0:1.0-1.el7 will be installed
–> Processing Dependency: centos-release-virt-common for package: centos-release-qemu-ev-1.0-1.el7.noarch
–> Running transaction check
—> Package centos-release-storage-common.noarch 0:1-2.el7.centos will be installed
—> Package centos-release-virt-common.noarch 0:1-1.el7.centos will be installed
–> Finished Dependency Resolution

Dependencies Resolved

=========================================================================================================
Package Arch Version Repository Size
=========================================================================================================
Installing:
centos-release-openstack-mitaka noarch 1-5.el7 extras 5.3 k
Installing for dependencies:
centos-release-ceph-hammer noarch 1.0-5.el7.centos extras 4.5 k
centos-release-qemu-ev noarch 1.0-1.el7 extras 11 k
centos-release-storage-common noarch 1-2.el7.centos extras 4.5 k
centos-release-virt-common noarch 1-1.el7.centos extras 4.5 k

Transaction Summary
=========================================================================================================
Install 1 Package (+4 Dependent packages)

Total download size: 30 k
Installed size: 23 k
Downloading packages:
(1/5): centos-release-ceph-hammer-1.0-5.el7.centos.noarch.rpm | 4.5 kB 00:00:00
(2/5): centos-release-openstack-mitaka-1-5.el7.noarch.rpm | 5.3 kB 00:00:00
(3/5): centos-release-qemu-ev-1.0-1.el7.noarch.rpm | 11 kB 00:00:01
(4/5): centos-release-storage-common-1-2.el7.centos.noarch.rpm | 4.5 kB 00:00:01
(5/5): centos-release-virt-common-1-1.el7.centos.noarch.rpm | 4.5 kB 00:00:02
———————————————————————————————————
Total 8.7 kB/s | 30 kB 00:00:03
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
Installing : centos-release-virt-common-1-1.el7.centos.noarch 1/5
Installing : centos-release-qemu-ev-1.0-1.el7.noarch 2/5
Installing : centos-release-storage-common-1-2.el7.centos.noarch 3/5
Installing : centos-release-ceph-hammer-1.0-5.el7.centos.noarch 4/5
Installing : centos-release-openstack-mitaka-1-5.el7.noarch 5/5
Verifying : centos-release-storage-common-1-2.el7.centos.noarch 1/5
Verifying : centos-release-openstack-mitaka-1-5.el7.noarch 2/5
Verifying : centos-release-ceph-hammer-1.0-5.el7.centos.noarch 3/5
Verifying : centos-release-virt-common-1-1.el7.centos.noarch 4/5
Verifying : centos-release-qemu-ev-1.0-1.el7.noarch 5/5

Installed:
centos-release-openstack-mitaka.noarch 0:1-5.el7

Dependency Installed:
centos-release-ceph-hammer.noarch 0:1.0-5.el7.centos
centos-release-qemu-ev.noarch 0:1.0-1.el7
centos-release-storage-common.noarch 0:1-2.el7.centos
centos-release-virt-common.noarch 0:1-1.el7.centos

Complete!

[root@cloud ~]# yum install openstack-packstack

[root@cloud ~]# packstack –gen-answer-file=24.02.17.conf
Packstack changed given value to required value /root/.ssh/id_rsa.pub
[root@cloud ~]# ls
24.02.17.conf anaconda-ks.cfg initial-setup-ks.cfg

[root@cloud ~]# vi 24.02.17.conf

# NTP Server
CONFIG_NTP_SERVERS=<NTP_Server_IP>

# Disable Demo Version
CONFIG_PROVISION_DEMO=n

# Set KeyStone Admin Password or Admin user Password
CONFIG_KEYSTONE_ADMIN_PW=mypassword

# Config Horizon over SSL
CONFIG_HORIZON_SSL=y

# Disable Nagios
CONFIG_NAGIOS_INSTALL=n

save and exit

[root@cloud ~]# yum install httpd
Resolving Dependencies
–> Running transaction check
—> Package httpd.x86_64 0:2.4.6-45.el7.centos will be installed
–> Processing Dependency: httpd-tools = 2.4.6-45.el7.centos for package: httpd-2.4.6-45.el7.centos.x86_64

Complete!

To generated answer configuration file with current date:

[root@cloud ~]# packstack –answer-file 24.02.17.conf
Welcome to the Packstack setup utility

The installation log file is available at: /var/tmp/packstack/20170224-112443-eqHTim/openstack-setup.log

Installing:
Clean Up [ DONE ]
Discovering ip protocol version [ DONE ]
Setting up ssh keys [ DONE ]
Preparing servers [ DONE ]
Pre installing Puppet and discovering hosts’ details [ DONE ]
Preparing pre-install entries [ DONE ]
Installing time synchronization via NTP [ DONE ]
Setting up CACERT [ DONE ]
Preparing AMQP entries [ DONE ]
Preparing MariaDB entries [ DONE ]
Fixing Keystone LDAP config parameters to be undef if empty[ DONE ]
Preparing Keystone entries [ DONE ]
Preparing Glance entries [ DONE ]
Checking if the Cinder server has a cinder-volumes vg[ DONE ]
Preparing Cinder entries [ DONE ]
Preparing Nova API entries [ DONE ]
Creating ssh keys for Nova migration [ DONE ]
Gathering ssh host keys for Nova migration [ DONE ]
Preparing Nova Compute entries [ DONE ]
Preparing Nova Scheduler entries [ DONE ]
Preparing Nova VNC Proxy entries [ DONE ]
Preparing OpenStack Network-related Nova entries [ DONE ]
Preparing Nova Common entries [ DONE ]
Preparing Neutron LBaaS Agent entries [ DONE ]
Preparing Neutron API entries [ DONE ]
Preparing Neutron L3 entries [ DONE ]
Preparing Neutron L2 Agent entries [ DONE ]
Preparing Neutron DHCP Agent entries [ DONE ]
Preparing Neutron Metering Agent entries [ DONE ]
Checking if NetworkManager is enabled and running [ DONE ]
Preparing OpenStack Client entries [ DONE ]
Preparing Horizon entries [ DONE ]
Preparing Swift builder entries [ DONE ]
Preparing Swift proxy entries [ DONE ]
Preparing Swift storage entries [ DONE ]
Preparing Gnocchi entries [ DONE ]
Preparing MongoDB entries [ DONE ]
Preparing Redis entries [ DONE ]
Preparing Ceilometer entries [ DONE ]
Preparing Aodh entries [ DONE ]
Preparing Nagios server entries [ DONE ]
Preparing Nagios host entries [ DONE ]
Preparing Puppet manifests [ DONE ]
Copying Puppet modules and manifests [ DONE ]
Applying 10.100.100.123_controller.pp
Testing if puppet apply is finished: 10.100.100.123_controller.pp [ \ ]
10.100.100.123_controller.pp: [ DONE ]
Applying 10.100.100.123_network.pp
10.100.100.123_network.pp: [ DONE ]
Applying 10.100.100.123_compute.pp
10.100.100.123_compute.pp: [ DONE ]
Applying Puppet manifests [ DONE ]
Finalizing [ DONE ]

**** Installation completed successfully ******

Additional information:
* File /root/keystonerc_admin has been created on OpenStack client host 10.100.100.123. To use the command line tools you need to source the file.
* To access the OpenStack Dashboard browse to http://10.100.100.123/dashboard .
Please, find your login credentials stored in the keystonerc_admin in your home directory.
* To use Nagios, browse to http://10.100.100.123/nagios username: nagiosadmin, password: password
* The installation log file is available at: /var/tmp/packstack/20170224-112443-eqHTim/openstack-setup.log
* The generated manifests are available at: /var/tmp/packstack/20170224-112443-eqHTim/manifests
[root@cloud ~]#

login

 
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Posted by on March 2, 2017 in Linux, OpenStack, Virtualization

 

How to configure HTTP load balancer with HAProxy on Linux

02 Mar

How to configure HTTP load balancer with HAProxy on Linux CentOS 6/7

HAProxy or High Availability Proxy is an open source TCP and HTTP load
balancer and proxy server software.

Prerequisites (3 servers)

1. Loadbalancer – 10.100.100.125

2. Webserver 1 – 10.100.100.123

3. Webserver 2 – 10.100.100.124
Configure HAProxy

I’m assume that there are two HTTP web servers up and running with IP
addresses 10.100.100.123 and 10.100.100.124. We also assume that the load
balancer will be configured at a server with IP address 10.100.100.125.

Step 1 – Configure host /etc/hosts files

# vi /etc/hosts

[root@loadbalancer]# cat /etc/hosts

10.100.100.125 loadbalancer loadbalancer.server.com

10.100.100.123 web1 web1.server.com
10.100.100.124 web2 web2.server.com

Step 2 – Install HAProxy on CentOS 6

# yum install haproxy

Step 3 – Configure HAProxy

Update your HAProxy configuration file /etc/haproxy/haproxy.cfg as per
your requirement, You may also use below given configuration file as an
example of setup and modify it.

# vim /etc/haproxy/haproxy.cfg

global

log 127.0.0.1 local2 # => log 127.0.0.1 local0

chroot /var/lib/haproxy
pidfile /var/run/haproxy.pid
maxconn 4000
user haproxy
group haproxy
daemon
nbproc 1 # Number of processing cores.

defaults

mode http
log global
option httplog
option dontlognull
option http-server-close
option forwardfor except 127.0.0.0/8
option redispatch
retries 3
timeout http-request 10s
timeout queue 1m
timeout connect 10s
timeout client 1m
timeout server 1m
timeout http-keep-alive 10s
timeout check 10s
maxconn 3000
#———————————————————————
# main frontend which proxys to the backends
#———————————————————————

frontend main
bind *:80
option http-server-close
option forwardfor
default_backend app-main
backend app-main
balance roundrobin
server web1 10.100.100.123:80 check
server web2 10.100.100.124:80 check

[root@loadbalancer ~]# /etc/init.d/haproxy restart
Stopping haproxy: [ OK ]
Starting haproxy: [ OK ]
[root@loadbalancer ~]#
Step 4 – Configure HAProxy rsyslog

# vi /etc/rsyslog.conf

Uncomment this line to enable the UDP connection:

$ModLoad imudp
$UDPServerRun 514

Then create new haproxy configuration file for rsyslog:

# cd /etc/rsyslog.d/
# vi haproxy.conf

local0.=info /var/log/haproxy.log #For Access Log
local0.notice /var/log/haproxystatus.log #For Service Info – Backend, loadbalancer

Testing:-

[root@pxeboot ~]# curl 10.100.100.123
This is Dilli Ganesh Server 1 …
[root@pxeboot ~]# curl 10.100.100.124
This is Dilli Ganesh Server 2 …
[root@pxeboot ~]#

[root@pxeboot ~]# curl 10.100.100.125
This is Dilli Ganesh Server 1 …
[root@pxeboot ~]# curl 10.100.100.125
This is Dilli Ganesh Server 2 …
[root@pxeboot ~]# curl 10.100.100.125
This is Dilli Ganesh Server 1 …
[root@pxeboot ~]# curl 10.100.100.125
This is Dilli Ganesh Server 2 …

 
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Posted by on March 2, 2017 in Apache, Cluster, Linux, Load Balancer