Created
May 30, 2018 00:01
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Set AWS EC2 instance hostname using cloud-config's bootcmd as userdata. Useful for autoscaling group launch configurations. Uses a prefix + instance ID, useful for Consul hosts for example.
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| #cloud-config | |
| bootcmd: | |
| - HOSTNAME=my-prefix-"$INSTANCE_ID" | |
| - echo "$HOSTNAME" > /etc/hostname && hostname -F /etc/hostname | |
| - grep -q "127.0.0.1 $HOSTNAME" /etc/hosts || echo "127.0.0.1 $HOSTNAME" >> /etc/hosts | |
| - grep -q "::1 $HOSTNAME" /etc/hosts || echo "::1 $HOSTNAME" >> /etc/hosts |
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