Zabbix is an open-source monitoring software tool for diverse IT components, including networks, servers, virtual machines regardless Linux or Windows and cloud services.It also can be used for monitoring HP ILO or Dell iDRAC.
Zabbix also has much more templates than you thought.For example you can monitoring your email server’s ip in common blacklists
On Vmware Esx server,You can increase size of your virtual hard disk easily.If you use lvm for your guest os,you will need to add new virtual hard disk or just increase the size of your current disk.This guide will help you to extend size of the disk after you resize of your virtual disk by using vsphere
After increased the size on ESX ,In Linux Terminal;
rescanning the device.host id can change and it depents to your system.you must do that if you dont want to restart your guest;
echo “- – -” > /sys/class/scsi_host/host0/scan
see your disk and partitions;
fdisk -l
lets add new partitions.after you create the partition,you will need to set type of disk to 8e (LVM)
cfdisk /dev/sda (please note your new partition name sample :sda3
see your disk&partitions status again;
fdisk -l
check for available space;
df -h
scan for new partition
partprobe
create physical volume by using new partitions.(disk name may differ.)
pvcreate /dev/sda3
see your volume group and check and confirm
vgdisplay
extend your volume group
vgextend centos /dev/sda3
recheck;
pvscan
extend your logical volume with using the new part
lvextend /dev/centos/root /dev/sda3
in this point,last step may change according to your file system.if you use xfs ;
xfs_growfs /dev/centos/root
for ext4
resize2fs /dev/centos/root
finally see your new available space
df -h
If the Linux server fails on boot with a message like this,You should add a parameter in grub boot editor which appears on boot.
When your server opens kernel list will appear on your screen.You use the arrow keys a kernel line like “Centos Linux 7 (Core) with Linux….” and type “e” button to edit.
After that,find the line which starts with linux add “selinux=0” like this below and type Ctrl button+x.Your server will open normally.After your server boots,fix the main problem about selinux that you have previously changed
Linux Support Here