Einstein

Einstein is currently a virtual machine running on Gourd. Go here for information about the old Einstein hardware.

Virtual Hardware

• Memory: 2 GB
• Hard Disk: 20 GB
• Swap Disk: 4 GB
• Network 1 (eth0): Farm-Bridge
• Network 2 (eth1): UNH-Bridge
• SCSI Controller: LSI Logic

Network Settings

• IP Address farm (eth0): 10.0.0.248
• IP Address UNH (eth1): 132.177.88.52

Software and Services

IPTables

Einstein uses the standard NPG iptables firewall. It allows ssh, LDAP, imap, smtp, and http connections.

LDAP

Einstein is our LDAP server. It provides user authentication among other useful services. LDAP configuration is located in /etc/openldap, and the LDAP database is stored in /var/lib/ldap.

Mail

Einstein is our Email server. The mail itself is stored in a raid1 volume on Gourd, and Einstein mounts the NFS share to /var/spool/mail.

Einstein should mount the NFS share at boot, but note that since it mounts by hostname you should make sure that DNS is accessible before starting the Einstein VM. Otherwise mail won't be mounted properly when the system boots. If for some reason DNS is unavailable you can manually mount the NFS share in /mail using gourd's IP address directly.

Webmail

Einstein provides web-based access to e-mail using Squirrelmail. You can access it at [1].

See also: Gourd/Einstein Migration Plan

Upgrade from RHEL5 to Centos7

OK, this has not been fun, and taken way too long.

Status

We have a running Centos7 Einstein2 system.

• It has Named installed and running as a slave to Jalapeño.
• Slapd is installed. Still working on it.