We have already installed everything we need, but if we are running an older Debian-based system such as Ubuntu or Mint, we have one more step. Before Corosync will work properly, we need to enable its startup script. Open the /etc/default/corosync file and make sure it contains this line:
START=yes
Without it, Corosync won't run even if we start it manually. We removed it from system boot time, but that doesn't mean we never want it to run at all!
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