Flavio Ishii

Erlang & Webmachine on Rackspace CentOS Cloud Server

This is a quick step-by-step process for getting Erlang (R13B04)  and Webmachine running on a clean CentOS 5.4 Rackspace cloud server.

Once you create your cloud server on Rackspace, open the Web console.

Secure your server

Follow the instructions for Securing your cloud server. Also do the following:
$ visudo
/sudoers
# Allow sudo cmd access to new user
[new_user] ALL=(ALL) ALL

Setup your Firewall

Check your iptables current configurations

$ iptables -L

Open ports

$ sudo /sbin/iptables -I RH-Firewall-1-INPUT 1 -p tcp –dport http -j ACCEPT
$ sudo /sbin/iptables -I RH-Firewall-1-INPUT 1 -p tcp –dport https -j ACCEPT
$ sudo /sbin/iptables -I RH-Firewall-1-INPUT 1 -p tcp –dport ssh -j ACCEPT
$ sudo /sbin/iptables -I RH-Firewall-1-INPUT 1 -p tcp –dport 8000 -j ACCEPT
$ sudo /sbin/services iptables save

Check your changes

$ iptables -L

Logout and close Web console.

Install Erlang

Open a terminal (or Putty on Windows) and SSH as [new_user]
$ ssh [new_user]@[your cloud server ip]
$ sudo yum install gcc glibc-devel make ncurses-devel openssl-devel
$ wget http://erlang.org/download/otp_src_R13B04.tar.gz
$ tar zxvf otp_src_R13B04.tar.gz
$ cd otp_src_R13B04
$ ./configure && make && sudo make install

Install Mercurial via RPM

$ yum install python-devel rpm-buildtp://mercurial.selenic.com/release/mercurial-1.4.1.tar.gz
$ wget http://mercurial.selenic.com/release/mercurial-1.4.1.tar.gz
$ cp mercurial-1.4.1.tar.gz mercurial-1.4.1.tar.gz.orig
$ tar zxvf mercurial-1.4.1.tar.gz
$ cd mercurial-1.4.1/
$ cp contrib/mercurial.spec contrib/mercurial.spec.orig
$ sed -i -e’s/snapshot/1\.4\.1/’ contrib/mercurial.spec
$ sed -i -e’s/, docutils >= 0.5//’ contrib/mercurial.spec
$ cd ../
$ tar cvf – mercurial-1.4.1 | gzip > mercurial-1.4.1.tar.gz$ rpmbuild -tb mercurial-1.4.1.tar.gz
$ rpm -Uvh /usr/src/redhat/RPMS/i386/mercurial-1.4.1-0.x86_64.rpm
$ hg –version

Install Webmachine

$ hg clone http://bitbucket.org/basho/webmachine/
$ cp -r webmachine /home/projects
$ cd /home/projects/webmachine
$ make
$ /scripts/new_webmachine.sh ediaryAPI ..
$ cd ../e*
$ make

Run Webmachine

$ ./start.sh

Visit http://[ip]:[port]

References

https://wiki.basho.com/display/RIAK/Installing+Erlang
http://cloudservers.rackspacecloud.com/index.php/Firewalls
http://cloudservers.rackspacecloud.com/index.php/Basic_Cloud_Server_Security
http://cloudservers.rackspacecloud.com/index.php/Common_iptables_rules_for_CentOS_5.3