Installing PHP modules using pecl command.

Once you have installed the php you need to install needed modules to support the development process. we can use the pecl function to install the modules.

To install pecl function.

yum install php-pear

Now to install needed modules just use pecl

pecl install <Module Name>

To install a beta version
pecl install <Module Name>-beta

To list all modules in pecl database

pecl list-all

To check whether the module is installed or not

php -m

Installing PHP 5.6 in Centos6/7

Compiling php can be difficult some time. But We can just install the latest version of php from proper remi repo.

Install Remi repository

CentOS and Red Hat (RHEL)
Remi and EPEL (Dependency) on CentOS 7 and Red Hat (RHEL) 7

64 bit : yum install -y http://dl.fedoraproject.org/pub/epel/7/x86_64/e/epel-release-7-2.noarch.rpm
yum install -y http://rpms.famillecollet.com/enterprise/remi-release-7.rpm


Remi and Epel repo ( Dependency ) on CentOS 6 and Red Hat (RHEL) 6
64 bit  : yum install -y http://dl.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm
32 bit  : yum install -yhttp://download.fedoraproject.org/pub/epel/6/i386/epel-release-6-8.noarch.rpm

yum install -y http://rpms.famillecollet.com/enterprise/remi-release-6.rpm


Installing PHP5.6 from the remi and httpd from local repo
CentOS 7/6.5/5.10 and Red Hat (RHEL) 7/6.5/5.10
yum --enablerepo=remi,remi-php56 install httpd php php-common

Install PHP 5.6.0 modules

yum --enablerepo=remi,remi-php56 install php-pecl-apcu php-cli php-pear php-pdo php-mysqlnd php-pgsql php-pecl-mongo php-sqlite php-pecl-memcache php-pecl-memcached php-gd php-mbstring php-mcrypt php-xml

Start Apache HTTP server (httpd) and autostart Apache HTTP server (httpd) on boot
## CentOS/RHEL 7 ##
systemctl start httpd.service ## use restart after update


## CentOS / RHEL 6.5/5.10 ##
/etc/init.d/httpd start ## use restart after update
## OR ##
service httpd start ## use restart after update


##CentOS/RHEL 7 ##
systemctl enable httpd.service

## CentOS / RHEL 6.5/5.10 ##
chkconfig --levels 235 httpd on


Create test PHP page to check that Apache, PHP and PHP modules are working
Add following content to /var/www/html/test.php file.

<?php

    phpinfo();
?>

Now Check the PHp page at http://<<SERVER_IP>>/test.php

Make sure that the EPEL and Remi repo's are disabled to avoid Further issue in future.

Module Available in Latest PHP

bcmath

bz2

calendar

com_dotnet

ctype

curl

date

dba

dom

enchant

ereg

exif

fileinfo

filter

ftp

gd

gettext

gmp

hash

iconv

imap

interbase

intl

json

ldap

libxml

mbstring

mcrypt

mssql

mysql

mysqli

mysqlnd

oci8

odbc

opcache

openssl

pcntl

pcre

pdo

pdo_dblib

pdo_firebird

pdo_mysql

pdo_oci

pdo_odbc

pdo_pgsql

pdo_sqlite

pgsql

phar

posix

pspell

readline

recode

reflection

session

shmop

simplexml

skeleton

snmp

soap

sockets

spl

sqlite3

standard

sybase_ct

sysvmsg

sysvsem

sysvshm

tidy

tokenizer

wddx

xml

xmlreader

xmlrpc

xmlwriter

xsl

zip

zlib

Openstack Juno - Neutron HA using VRRP (Keepalived)

First configure two neutron server's. Let that be network and network1 .
http://www.adminz.in/2014/10/openstack-juno-part-5-neutron.html

Then install Keepalived in both the neutron server's.

#Added Following entries in both neutron server
#in  /etc/neutron/neutron.conf
l3_ha = True
#And the HA Scheduler has to be used :
router_scheduler_driver = neutron.scheduler.l3_agent_scheduler.ChanceScheduler
network_scheduler_driver = neutron.scheduler.dhcp_agent_scheduler.ChanceScheduler

In Controller Server Database update
neutron-db-manage --config-file=/etc/neutron/neutron.conf  --config-file=/etc/neutron/plugins/ml2/ml2_conf.ini upgrade head

  mkdir /etc/neutron/rootwrap.d
cp /usr/share/neutron/rootwrap/l3.filters /etc/neutron/rootwrap.d/

Now restart the Openstack Services in  all the controller and neutron nodes.



On Controller Server Create a new set of Network setting

source admin-openrc.sh
neutron net-create ext-net --shared --router:external True --provider:physical_network external --provider:network_type flat
neutron subnet-create ext-net --name ext-subnet --allocation-pool start=10.1.0.101,end=10.1.0.200 --disable-dhcp --gateway 10.1.0.42 10.1.0.0/24


To create the tenant network
neutron net-create cli-net
neutron subnet-create cli-net --name cli-subnet --gateway 192.168.1.1 192.168.1.0/24
neutron router-create cli-router
neutron router-interface-add cli-router cli-subnet
neutron router-gateway-set cli-router ext-net


Now if we check both the neutron node we can see the router's.

[root@network ~]# ip netns
qrouter-26aed9ea-b9d5-4427-a3e4-9e75be3e1bfa
[root@network ~]#

[root@network2 ~]# ip netns
qrouter-26aed9ea-b9d5-4427-a3e4-9e75be3e1bfa
[root@network2 ~]#


[root@network ~]#  ip netns exec qrouter-26aed9ea-b9d5-4427-a3e4-9e75be3e1bfa ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host
       valid_lft forever preferred_lft forever
10: ha-224b2c85-81: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN
    link/ether fa:16:3e:42:4d:52 brd ff:ff:ff:ff:ff:ff
    inet 169.254.192.8/18 brd 169.254.255.255 scope global ha-224b2c85-81
       valid_lft forever preferred_lft forever
    inet6 fe80::f816:3eff:fe42:4d52/64 scope link
       valid_lft forever preferred_lft forever
11: qr-842e3e41-3a: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN
    link/ether fa:16:3e:13:bc:63 brd ff:ff:ff:ff:ff:ff
    inet 192.168.1.1/24 scope global qr-842e3e41-3a
       valid_lft forever preferred_lft forever
    inet6 fe80::f816:3eff:fe13:bc63/64 scope link
       valid_lft forever preferred_lft forever
12: qg-04d4c06e-49: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN
    link/ether fa:16:3e:b7:19:b8 brd ff:ff:ff:ff:ff:ff
    inet 10.1.0.101/24 scope global qg-04d4c06e-49
       valid_lft forever preferred_lft forever
    inet6 fe80::f816:3eff:feb7:19b8/64 scope link
       valid_lft forever preferred_lft forever
[root@network ~]#
[root@network ~]#



[root@network2 ~]# ip netns exec qrouter-26aed9ea-b9d5-4427-a3e4-9e75be3e1bfa ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host
       valid_lft forever preferred_lft forever
16: ha-37517361-ec: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN
    link/ether fa:16:3e:6f:a0:11 brd ff:ff:ff:ff:ff:ff
    inet 169.254.192.7/18 brd 169.254.255.255 scope global ha-37517361-ec
       valid_lft forever preferred_lft forever
    inet6 fe80::f816:3eff:fe6f:a011/64 scope link
       valid_lft forever preferred_lft forever
17: qr-842e3e41-3a: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN
    link/ether fa:16:3e:13:bc:63 brd ff:ff:ff:ff:ff:ff
    inet 192.168.1.1/24 scope global qr-842e3e41-3a
       valid_lft forever preferred_lft forever
    inet6 fe80::f816:3eff:fe13:bc63/64 scope link
       valid_lft forever preferred_lft forever
18: qg-04d4c06e-49: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN
    link/ether fa:16:3e:b7:19:b8 brd ff:ff:ff:ff:ff:ff
    inet 10.1.0.101/24 scope global qg-04d4c06e-49
       valid_lft forever preferred_lft forever
    inet6 fe80::f816:3eff:feb7:19b8/64 scope link tentative dadfailed
       valid_lft forever preferred_lft forever
[root@network2 ~]#


In above output you can see the device  qg-04d4c06e-49 and  qr-842e3e41-3a has been created in both the server.