Installing and Configuring ELK

– Part one(1) – Install OS (OEL 7.2), Tuning

– Part two(2) – Configure KVM, Tuning

– Part three(3) – install elasticsearch, configuration

– Part four(4) – Install logstash, configuration

– Part five(5) – Install Kibana, configuration

– Part six(6) – General platform tips & tricks

This is Part two(2) – Configure KVM, Tuning

Configure Storage needed for Elasticsearch

Make sure FC zoning and lun masking is done
To get WWN/P

cat /sys/class/scsi_host/host*/device/fc_host/host*/node_name
# Example
0x20000025b5c1000a
0x20000025b5c1000a

# anther way to get WWN/P
# systool command is provided by the rpm package “sysfsutils”
systool -c fc_host -v | grep “port_name”

Configure multipathing

cp /usr/share/doc/device-mapper-multipath-/multipath.conf /etc
mpathconf –enable –with_multipathd y

# Verify it works as expected
multipath -ll

For Villon or 3Par configure round robin multipath

Add to /etc/multipath.conf

devices {
    device {
        vendor                "VIOLIN"
        product               "SAN ARRAY"
        path_grouping_policy  group_by_serial
        path_checker          tur
        path_selector         "round-robin 0"
        hardware_handler      "0"
        failback              immediate
        rr_weight             uniform
        no_path_retry         fail
        rr_min_io             4
    }
     device {
        vendor                "3PARdata"
        product               "VV"
        path_grouping_policy  multibus
        path_checker          tur
        path_selector         "round-robin 0"
        hardware_handler      "0"
        failback              immediate
        features              "0"
        rr_weight             uniform
        no_path_retry         18
        #rr_min_io_rq          1
     }
}

Then run the below

multipath -F
multipath -v2

# Verify config (or reboot)
multipath -ll

nstalling linux multipath with violin

Prepare CD for KVM use

Copy OEL 7.2 CD ISO

cp oel-7.2.iso /var/lib/libvirt/images

Install OEL-7.2 KVM/VM

Use virt-manager
Select Local install & select OEL ISO
Select OS type as Linux and Version RHEL 7.2
Select Proper Memory & CPU size (as per table in part one)
Select Disk size 25Gb
Change hostname, select network br0
Note: Check the box for Customize configuration, otherwise your keyboard wont work.
Once on the configure screen
Select Display Spice >
Change Type VNC Server
Change Address All Interface

Select install options

Set swap 2Gb
Set XFS or Ext4 for file system
Note: Leave most space in /
In the Software selection, select performance tools

OS Tuning

Turn swaping off and expand MMap stack

# swaping off
swapoff -a

##
# turn off swapping
vm.swappiness = 1
# up the number of connections per port
net.core.somaxconn = 65535
#(default) http://www.redhat.com/magazine/001nov04/features/vm
vm.max_map_count = 262144
# http://www.tldp.org/LDP/solrhe/Securing-Optimizing-Linux-RH-Edition-v1.3/chap6sec72.html
fs.file-max = 518144

# Activate changes
sysctl -p /etc/sysctl.conf

File descriptors & memory lock

/etc/security/limits.conf
[...] snip
* soft nofile 65000
* hard nofile 65000
* soft memlock unlimited
* hard memlock unlimited

Complete services pre-requisite

Disable firewalld & selinux

cat /etc/selinux/config
SELINUX=disabled
SELINUXTYPE=targeted
SETLOCALDEFS=0

# Without reboot (temp disabled)
setenforce 0

Start the proper services

# Disable firewall
systemctl stop firewalld
systemctl disable firewalld

KVM Help
https://help.ubuntu.com/community/KVM/Managing
Next Part three(3) – install elasticsearch, configuration