using libguestfs virt-customize tool to modify qcow2 image and reset root password.

-

ibguestfs is a C library and a set of tools for accessing and modifying virtual disk images used in platform virtualization. The tools can be used for viewing and editing virtual machines managed by libvirt and files inside VMs, scripting changes to VMs, creating VMs, and much else beside.

virt-customize is one of them as example.
If you forgot root user password here is how you can modify .

# virsh shutdown debian9-vm1
# virt-customize -a /var/lib/libvirt/images/debian9-vm1.qcow2 --root-password password:NewRootUserPasswordHere 

not only this but you can edit many more.

The –run-command option is used to execute any command inside a virtual image file.
1) register with rhel subscription 
virt-customize -a rhel-server-7.6.qcow2 --run-command 'subscription-manager attach --pool [subscription-pool]'
 
 
Install software or packages-
virt-customize -a rhel-server-7.6.qcow2 --install net-tools

 Upload a file into image

virt-customize -a rhel-server-7.6.qcow2 --upload yum.conf:/etc/yum.conf

Setup timezone

virt-customize -a rhel-server-7.6.qcow2 --timezone "Asia/Kolkata"

Upload your ssh public key
virt-customize -a rhel-server-7.6.qcow2  --ssh-inject jmutai:file:./id_rsa.pub


Comments

Post a Comment

Popular posts from this blog

Running web ssh client on port 443 /80 with nginx as reverse proxy

-
Package used         : shellinabox , nginx Repository used        : epel-release Linux distro used    : Centos 7.6 nginx reverse proxy server ip : 192.168.1.65 shellinabox web ssh server ip : 192.168.1.111 login to web ssh server first install epel-repo # yum install epel-release -y install shellinabox package # yum -y install shellinabox start and enable shellinaboxd service # systemctl enable shellinaboxd && systemctl start shellinaboxd By default shellinaboxd service starts with ssl port 4200 for us to run this in a reverse proxy environment need to make this as insecure hence the encryption will be done by nginx to end user. edit file /etc/sysconfig/shellinabox  like bellow- USER=shellinabox GROUP=shellinabox CERTDIR=/var/lib/shellinabox PORT=4200 OPTS="--disable-ssl-menu -s /:LOGIN" OPTS="-t -s /:SSH:192.168.1.111" save file exit and restart service # systemctl restart shellinaboxd Now open firewall for listening port 4200 from nginx proxy server only #
Read more

Running cockpit behind nginx reverse proxy with nginx ssl and cockpit non ssl

-
Domain for web access to cockpit : cockpit.mylab.local cockpit server ip : 192.168.1.61 nginx server ip   : 192.168.1.65 Linux distro using is Centos 7.6 Login to cockpit server Create a file [root@repo ~]# vim /etc/cockpit/cockpit.conf content will be like [WebService] Origins = https://cockpit.mylab.local wss://cockpit.mylab.local ProtocolHeader = X-Forwarded-Proto AllowUnencrypted = true save and restart cockpit # systemctl restart cockpit now  login to your nginx webserver and install nginx # yum install nginx -y create a new file vim /etc/nginx/conf.d/cockpit.conf paste content as bellow server {     listen         80;     listen         443 ssl http2;     server_name    cockpit.mylab.local;     ssl_certificate /etc/ssl/certs/cockpit-selfsigned.crt;     ssl_certificate_key  /etc/ssl/private/cockpit-selfsigned.key;     location / {         proxy_pass http://192.168.1.61:9090;         proxy_set_header Host $host;         proxy_http_version 1.1;
Read more

Setup VOD streaming server with nginx using RTMP on Ubuntu 18.04

-
Install required packages for source code nginx build # apt-get install -y build-essential ca-certificates wget curl libpcre3 libpcre3-dev autoconf unzip automake libtool tar git libssl-dev zlib1g-dev uuid-dev lsb-release vim htop sysstat ufw fail2ban makepasswd libgd-dev libgeoip-dev -y create a directory # mkdir /usr/local/src/nginx/ # cd /usr/local/src/nginx/ download and extract nginx tar # wget -qO- http://nginx.org/download/nginx-1.14.2.tar.gz | tar zxf - clone nginx rtmp module # git clone https://github.com/arut/nginx-rtmp-module Download other modules - PCRE version 8.42 # wget https://ftp.pcre.org/pub/pcre/pcre-8.42.tar.gz && tar xzvf pcre-8.42.tar.gz - zlib version 1.2.11 # wget https://www.zlib.net/zlib-1.2.11.tar.gz && tar xzvf zlib-1.2.11.tar.gz - OpenSSL version 1.1.0h # wget https://www.openssl.org/source/openssl-1.1.0h.tar.gz && tar xzvf openssl-1.1.0h.tar.gz # cd nginx-1.14.2/ configure  nginx with modules and options # ./configure --add-modu
Read more