kvm

Install KVM

This is a tutorial on how to's for create KVM guests.

Add the following to ifcfg-em1:

NETWORKING=yes
HOSTNAME=maincentos
GATEWAY=192.168.1.1
BRIDGE=br0

Add the following to ifcfg-br0:

TYPE=Bridge
BOOTPROTO=dhcp
NAME=br0
DEVICE=br0
ONBOOT=yes

Create Volume Pool

virsh pool-define-as guest_images dir - - - - "/vm-data/"
virsh pool-start guest_images
virsh pool-autostart guest_images

Volume for Guest

virsh vol-create-as <pool-name> <volume-name> 12G

virsh attach-disk <guest-name> --source /path/to/<volume-name> --target vdb --persistent

virsh detach-disk <guest-name> --source /path/to/<volume-name> --persistent

launch artifactory in Host

docker run --name artifactory-pro -d -v /opt/jfrog/artifactory:/var/opt/jfrog/artifactory -p 8081:8081 docker.bintray.io/jfrog/artifactory-oss:latest

launch gitlab in host

https://docs.gitlab.com/omnibus/settings/backups.html

Creating Logical Volumes

pvcreate sdb
vgcreate vmgroup /dev/sdb
vgs
lvcreate -L 275G -n vm_volume vmgroup
yum -y install gfs2-utils
mkfs.gfs2 -p lock_nolock -j 1 /dev/vmgroup/vm_volume 
mkdir /vm-volume
mount /dev/vmgroup/vm_volume /vm-volume

moving logical volume to different host - http://tldp.org/HOWTO/LVM-HOWTO/recipemovevgtonewsys.html

Launch VM

virt-install --name kubetest --memory 4096 --vcpus 2 --disk /vm-data/rootvol  --location /tmp/CentOS-7-x86_64-Minimal-1804.iso --os-variant linux --initrd-inject ks.cfg --extra-args="ks=file:/ks.cfg console=tty0 console=ttyS0,115200n8" --nographics

Install LDAP

yum install https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm
yum install 389-ds-base
yum install 389-ds
setup-ds-admin.pl

http://directory.fedoraproject.org/docs/389ds/download.html

systemctl start dirsrv-admin

Using LDAP

https://access.redhat.com/documentation/en-US/Red_Hat_Directory_Server/8.2/html/Administration_Guide/Examples-of-common-ldapsearches.html

https://access.redhat.com/documentation/en-US/Red_Hat_Directory_Server/8.2/html/Administration_Guide/Configuring_Directory_Databases.html

ldapsearch -D "cn=directory manager" -p 389 -b "dc=npmake,dc=io" -s sub "(objectclass=*)" -h ldap.npmake.io -w password

add user: ldapmodify -D "cn=directory manager" -p 389 -h ldap.npmake.io -w password -f saurab.ldif

FreeIPA Server Install

firewall-cmd --permanent --add-port=80/tcp
firewall-cmd --permanent --add-port=88/tcp
firewall-cmd --permanent --add-port=389/tcp
firewall-cmd --permanent --add-port=443/tcp
firewall-cmd --permanent --add-port=888/tcp
firewall-cmd --permanent --add-port=88/udp
firewall-cmd --reload
yum install ipa-server
ipa-server-install

For Sudo

change password ldappasswd -Y GSSAPI -S -h freeipa.taskit.com uid=sudo,cn=sysaccounts,cn=etc,dc=taskit,dc=com

Add First User

https://www.lisenet.com/2016/freeipa-server-on-rhel-7-centos-7/ https://www.freeipa.org/page/Quick_Start_Guide#Adding_your_first_user

 kinit admin
 ipa config-mod --defaultshell=/bin/bash
 ipa user-add 
 ipa passwd sjoshi

FreeIPA CLient Install

ipa-client-install --server test.fios-router.home --domain test.fios-router.home  -w password --principal admin
authconfig --enablemkhomedir --update

configure clients to use sudo rule: https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/6/html/identity_management_guide/config-sudo-clients

FreeIPA DNS

https://www.freeipa.org/page/DNS

LDAP Commands

ldapsearch -Y GSSAPI -b "dc=taskit,dc=com" searches everything under rootdn

sjoshi10/kvm

kvm