Today, we had to migrate a virtialbox VM to VMware, and i had to deal with a lot of issues. Hence i thought about documenting it here since it may help someone. Convert QCOW2 to VMDK If you are migrating from a KVM, use the below additional steps to convert the Disk to vmdk and …
Today I was thinking to automate the new addition of website check to our monitoring systems. Since we are using multiple providers for website monitoring, it is a headache to go to each portal and add the website to the portals. So, I have decided to add a Jenkins key where a single click will …
Today I was thinking about passing the host IP on the ansible-playbook I’m going to run to automate something. As per the documentation, it says –i hostname in a comma separated input will work fine. I was trying to give the IP like ansible-playbook playbook.yml -i 1.1.1.1 in the playbook command line and it was not working, then I figured out that we need …
Ansible Playbook – How to pass hostname or IP in the Command line Read More »
I was configuring Zabbix for our cPanel servers. A few years back I had configured Zabbix with Manual mount points. But this time, I want to use the File System Discovery to make the setup easier for the team. The default configuration of Zabbix will detect all the virtfs mount point from the cPanel servers …
How to exclude virtfs or any Mount Point from Zabbix Filesystem Discovery Read More »
Today I ran into an issue on my Ubuntu box. I had an NTFS partition mounted via /etc/fstab . I had booted my PC into Windows for some reason and booted back to the Ubuntu and the system got stuck in the maintenance mode. The solution to fix the boot issue was to comment the fstab …
The NTFS partition is in an unsafe state. Please resume and shutdown Read More »
Issue Today I was working on a modifying autoscaling group and playing with some options in suspended action. After testing the things, I found that the new instances were not launching even if I haven’t suspended that action. Debug As I checked, I had kept “Terminate” in the suspended action in the Autoscaling Group …
If you ever get a white page on your WordPress, the best way to troubleshoot is to check the apache error log first. It will have enough information about the issue happening now. In my case, the error was showing as below in the /var/log/httpd/error_log file. PHP Fatal error: Uncaught Error: Call to …
WordPress White page error – Call to undefined function imagecreatefromstring Read More »
Install Software Collections yum -y install yum-plugin-priorities Add [priority=1] to official repository sed -i -e “s/\]$/\]\npriority=1/g” /etc/yum.repos.d/CentOS-Base.repo yum -y install epel-release Add [priority=5] to the EPEL repo sed -i -e “s/\]$/\]\npriority=5/g” /etc/yum.repos.d/epel.repo Add CentOS SCLo Software collections Repository. [root@aws ~]# yum -y install centos-release-scl-rh centos-release-scl Add [priority=10] to the SCL repository [root@aws ~]# sed -i …
Ubuntu Made for Home, SMB and Development use. Ubuntu is derived from Debian, you can enjoy new version and features of software packages but a high chance for bugs and security issues. Security updates are not backported. Ie you have to jump to the latest version of the package to get the security fix. An …
Yum-Cron Yum-cron is used to update the server automatically. This service will update the server with all the packages or only the security patches as configured on /etc/yum/yum-cron.conf But, the yum-cron lack in reboot feature. If any packages, say kernel, glibc or gcc require a reboot of the server then we have to do the reboot manually. …
CentOS RHEL – reboot after kernel update or if reboot needed Read More »
