Noooooooo! Grub and Linux Serial Re-direction However I wasn’t off the hook just yet, I could monitor the server bootstrapping itself, choosing local disk boot instead of PXE, but just before the bootloader menu, the screen went dark. Then quickly active the SoL console session and watch the server boot: ipmitool -I lanplus -H 192.168.99.1 -U user -P pass password sol activate You can check the current power status of the server: ipmitool -I lanplus -H 192.168.99.1 -U user -P pass chassis power statusĪnd you can reset the server using this brutal command (please check you’ve got the right server): ipmitool -I lanplus -H 192.168.99.1 -U user -P pass chassis power reset
I started by installing the ipmitool package on my local ubuntu machine. It might work for you but I have a strong preference for the command line. The BMC normally has an embedded web server which is fine for doing power resets, but requires a java-based applet to do SoL. The console view is provided by IPMI Serial-over-Lan (SoL) but requires IPMI v2.0, sometimes called ‘lanplus’. The two specific functions I would need were the ability to remotely reset the server, and a view of the server console. The BMC is a micro-controller embedded on the server motherboard which allows remote management without relying upon the server OS. I was locked out of the server, but was happy to learn that the Intelligent Platform Management Interface (IPMI) was a powerful tool indeed.īoth the IPMI protocol and HP’s iLO allow you to connect to the Baseboard Management Controller (BMC) on high-end servers. Of course the inevitable happened and I haplessly disabled my eth0 interface. Not that I’d need it of course I was experimenting with network settings whilst ssh’d into a server that was four and a half thousand miles away. The server didn’t have an IP-KVM attached but it did have a working IPMI connection.
I’ve been trying to learn linux networking and virtualisation using a donated server in a remote lab.
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