Migrate sbarjatiya.com VM

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Migrate sbarjatiya.com VM

VM creation on AWS

1. Create a new AWS account
2. Create a CentOS 7.x VM with updates VM is same region and availability zone as previous VM with. Disk space should be at least same as previous VM.
3. Obtain a elastic IP and associate with the VM
4. Add entry in /etc/hosts of current machine with appropriate name for new elastic IP (eg newcommonhosting)
5. Log into older AWS account using private browser
6. Add entry in /etc/hosts of previous VM with appropriate name for previous elastic IP (eg oldcommonhosting)
7. SSH to oldVM
8. Set correct hostname using

   hostname oldcommonhosting

9. Update /etc/hostname with oldcommonhosting name
10. Exit from SSH and reconnect and verify oldcommonhosting name appears
11. SSH to new VM using centos and root may not work
12. Do "sudo su -" on new VM to get root console
13. Install vim

    yum -y install vim

14. Set correct hostname in /etc/hostname
15. Set hostname for current run

    hostname newcommonhosting

16. Edit /root/.ssh/authorized_keys and allow direct root ssh (150x on first line)

    Also copy saurabh@labpc as authorized on new VM root account

17. Exit from new VM and SSH again as root without using any additional identity apart from saurabh@labpc. Verify newcommonhosting name appears.
18. Fully update the VM to latest packages

    yum -y update --skip-broken

19. Create swap file as mentioned at CentOS 7.x adding swap space using file
20. Configure security group commonhosting-sg with same rules as existing VM. That is access to
    • SSH (22)
    • HTTP (80), HTTPS (443)
    • SMTP (25), SMTPS (465)
    • Custom Alt-web (8080)
    • ICMP echo-request

    from anywhere

21. Reboot the new VM

Package installations

1. yum -y install epel-release wget
2. Copy old servers public key as authorized on new server. Run 'ssh-keygen' on old server if there is no existing public key.
3. Create /etc/hosts entry on old server for pointing to new server
4. ssh from oldserver to newserver with name (eg newcommonhosting) and accept the ssh fingerprint of new host
5. setenforce 0 on new server
6. edit /etc/sysconfig/selinux and set SELINUX=disabled on new server
7. rsync /mnt/data1 from old server to new server

   rsync -aHz --delete /mnt/data1/ root@newcommonhosting:/mnt/data1/

   Since this will take time, leave this shell running and open new root shell for previous server

8. Use Storing date / time along with commands in history
9. Exit and ssh again to newcommonhosting for history settings to take effect

Copy user accounts and home folders

1. Run following commands:

   rsync /etc/{passwd,shadow,group} root@newcommonhosting:/etc/
   rsync -aHz /home/ root@newcommonhosting:/home/
   rsync -aHz --exclude ".ssh"  --exclude ".bash_history" /root/ root@newcommonhosting:/root/
   rsync -aHz --delete /etc/postfix/ root@newcommonhosting:/etc/postfix/

2. If ssh to new server from old server stops then due to unprotected private key error then use:

   chmod 600 /etc/ssh/*

   on new server to fix the issue

3. Restart postfix on new server

   systemctl restart postfix
   systemctl status postfix

4. Run following on both servers and compare to ensure all things got copied successfully

   du -sh /mnt/data1
   du -sh /home
   getent passwd

Configure web server

1. Install required packages on new server

   yum -y install httpd mod_ssl php-mysql php-pdo php-xml php

2. Update php version to 7.x for latest mediawiki using CentOS 7.x Installing PHP 7.x
3. Copy web server configuration from old server to new

   rsync -vtrp /etc/httpd/{conf,conf.d} root@newcommonhosting:/etc/httpd/

4. Start and enable web server on new VM

   systemctl start httpd
   systemctl enable httpd
   systemctl status httpd

Install and configure erlang/yaws

1. Install erlang and yaws on new server

   yum -y install erlang yaws

2. Setup yaws using sbarjatiya user as follows

   su - sbarjatiya
   cd ~/erlang/applications/interpreter; erlc *.erl
   cd ~/erlang/applications/wol_application; erlc *.erl
   cd ~/erlang/erlangcentral.com; erlc *.erl

3. Edit start_yaws.sh and replace old hostname with new hostname
4. Edit start_applications.erl and replace old hostname with new hostname
5. Again compiled edited files

   erlc *.erl

6. Try to start yaws using sbarjatiya user

   ./start_yaws.sh

7. Verify whether yaws is running or not

   yaws --ls

8. exit from sbarjatiya user

Configure MySQL and migrate databases

1. Install Mariadb server, bzip2 and sshpass

   yum -y install mariadb-server sshpass bzip2

2. Start and enable mariadb database

   systemctl start mariadb
   systemctl enable mariadb
   systemctl status mariadb

3. Look at '/mnt/data1/plain_folders/documents/public_html/notes_wiki/LocalSettings.php' file for MySQL credentials

   mysql
   > create database notes_wiki;
   > grant all on notes_wiki.* to notes_wiki@localhost identified by '<redacted>';
   > flush privileges;

4. Import database backup

   /mnt/data1/plain_folders/documents/public_html
   ./import_notes_database.sh

Configure AWStats, copy old logs

1. yum -y install awstats perl-Geo-IP
2. copy
   • /etc/awstats
   • /var/lib/awstats
   • /var/log/httpd

   from old server to new server

3. Run following:

   wget http://geolite.maxmind.com/download/geoip/database/GeoLiteCity.dat.gz
   gunzip GeoLiteCity.dat.gz
   mkdir /usr/local/share/GeoIP
   mv -f GeoLiteCity.dat /usr/local/share/GeoIP
   chmod -R 755 /usr/local/share/GeoIP

4. service httpd restart

Copy firewall, change DNS and check things

1. copy /etc/sysconfig/iptables from old server to new
2. Note old public IP and new public IP properly
3. Add /etc/hosts entry for old public IP
4. Change DNS as follows on godaddy.com:
   • rekallsoftware.com :: @
   • energyconservationclub.in :: @
   • erlangcentral.com :: @
   • pbarjatiya.com :: @
   • sbarjatiya.com :: @
5. Shutdown old VM (Do not release elastic IP yet)
6. Check following URLs:
   • http://www.rekallsoftware.com/
   • http://www.sbarjatiya.com/
   • http://www.sbarjatiya.com/notes_wiki/
   • http://www.energyconservationclub.in/
   • http://pbarjatiya.com/
   • http://www.erlangcentral.com/
   • http://www.erlangcentral.com/interpreter/index.yaws
7. Send email to saurabh@sbarjatiya.com, saurabh@energyconservationclub.in
8. Release elastic IP from old VM
9. Update ssh known_hosts keys on rekallcm1 for sbarjatiya.com and www.sbarjatiya.com.
10. Take one full backup.

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