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How to setup Memcache on CentOS 7 for Drupal site One way to optimize the authenticated users experience in Drupal site is to use Memcache. It works between the database and Drupal. Typically the queries are cached in the database but with Memcache the queries sent from Drupal to database are intercepted by Memcache and […] Mitigate DDoS attack with ngx_http_limit_req_module and fail2ban The fail2ban do have comprehensive collection of scripts that scan log files and ban IPs that match malicious activities. But we are going to look on how to use ngx_http_limit_req_module logs to ban IPs that shows sign of Distributed Denial of Service (DDoS) attack on your website. It […] This article, we will take a look on how to exempt from banning visitors from a specific country using Fail2ban and geoip. It is assumed that Fail2ban is already installed and configured in your server. Lets install first the geoip: yum install geoip Create Fail2ban action script: vi /etc/fail2ban/action.d/geohostsdeny.conf Copy the following script: [Definition] # […] MariaDB is a branch of Mysql, it has been widely used in open source projects, such as hot openstack, therefore, in order to ensure high availability of the service, while increasing the load capacity of the system, the cluster deployment is essential. MariaDB Galera Cluster Introduction MariaDB Galera Cluster is an open source MariaDB synchronous […] Pacemaker Apache on High Availability CENTOS 7
Red Hat, Inc. introduces new Open Source Software in their every release. Red Hat Enterprise Linux 7 High Availability Add-On introduces a new suite of technologies that underlying high-availability technology based on Pacemaker and Corosync that completely replaces the CMAN and RGManager technologies from […] Alternatively, you can install the new Chrony service that is quicker to synchronize clocks in mobile and virtual systems. Install the Chrony service: # yum install -y chrony Activate the Chrony service at boot: # systemctl enable chronyd Start the Chrony service: # systemctl start chronyd [root@apache2 ~]# yum install chrony -y Loaded plugins: fastestmirror […] iSCSI Configuration on RHEL 7 / CentOS 7 Step 1: First you need to create partition [root@server1 ~]# fdisk -c /dev/sdb Press ‘p’ to print partition table Press ‘n’ to create a new partition Press ‘p’ to create primary partition Type Partition Number : […] How to create OpenSSH rpm package and its upgrade In this tutorial we will create rpm package of OpenSSH version 6.7 stable version and will do OpenSSH upgrade. You may be wondering why it is required to create rpm package of OpenSSH version. The answer is because of CVE-2014-2532 . We recently notified with the […] Tags: biosdevname=0, default network device, GRUB_CMDLINE_LINUX, how to change network name to old eth0, net.ifnames=0, net.ifnames=0 biosdevname=0, Red Hat Enterprise Network name Step 1) add kernel boot args & regenerate the grub config The following kernel boot arguments need to be added: biosdevname=0 net.ifnames=0 Open /etc/default/grub with your favorite editor and add those […] Below is an example on how to configure network teaming on RHEL/CentOS 7. It is assumed that you have at least two interface cards. Show Current Network Interfaces [root@rhce-server ~]$ ip link 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 2: eno16777736: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state […] |
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