Proxmox cluster and considerations

 Setup Proxmox Cluster

*Be carful if you use DCHP and then plan change to use static IP's , you will need to change the IP       address in two places. Even if you try change the IP while in the join UI. 

    1. Under Host - System - Network , select your Nic then edit

    2. Under Host - Sytem - Hosts. There you can see the contents of the /etc/hosts file. 

        If this dosent match your new IP, joining it to a cluster wont work, as it will still use the old IP.

        

    3. To achive this I use win-scp to SFTP into the host. After you've logged in, click the folder with the         up arrow. Nagigate to /etc/ and find the file called Hosts. Change the IP and save it back.

    

4 . Now that yo've created a cluster adding nodes.

*Also be carefull especially when in a lab enviroment to make you Promox disk big enough. 

  You, can add external storage specified for ISO, but still if you upload lets say an ISO of 4GB, Pormox   will cache the ISO file locally then transfer it accross. And if the upload fails due to lack of space, it      wont clean up the used space, you will have to delete the temp file. 

Where Proxmox uploads the file is  /var/tmp/pveupload-SomeLongNumber