Standing up a nice Centos instance.

Select "CentOS 7 (x86_64) - with Updates HVM" AMI by vendor "CentOS.
  (There are very few by this provider).

Trying a 3G gt2 root disk

First login as centos using key "blaine-awskp.pem" (Not blaine01*!)

Bootstrap root access
Upload ~blaine/.ssh/ec2root.pvk to ~root:.ssh/.  Fix permis.  Remove interms.
cd ~/.ssh; scp -p -P 722 -i *.pvk <OTHERINST>:$PWD/* .
Edit "config" to add entry for current host.  Distribute back to others with scp.

SELINUX setup
For lighttpd access to /srv/... something:
egrep AVC.+user_tmp_t /var/log/audit/audit.log | audit2allow -M lighttpd_static
semodule -i lighttpd_static.pp

rm -rf /etc/ssh/*_key*



AFTER INSTANTIATING FROM MY AMI
Attach the root volume (/dev/sda1) onto any other instance.  Assume load as sdf:
    xfs_admin -L WK_ROOT /dev/xvdf1
    xfs_admin -U generate /dev/xvdf1
    mount /dev/xvdf1 /mnt
    xfs_admin -u /dev/xvdf1 > /mnt/root/rootdisk.uuid
    cd /mnt/etc
    vim hostname  sysctl.conf fstab  # Replace uuid root mount with LABEL=
    #####   May be that only need to add DHCP_HOSTNAME=workhorse.admc.com to
    #####   /etc/sysconfig/network-scripts/ifcfg-eth0
    #####  DOES NOT WORK!!!  Need an 'at' command to keep rerunning hostname???
    cd ssh
    rm -f *_key*  # AND REBOOT or put in place whatever keys you want
    cd /mnt/boot
    export NEW_LABEL=WH_ROOT
    ~/ec2/grubLabelize.pl *.cfg
Reattach to new instance and boot up
sysctl -p /etc/sysctl.conf