Create Blackout for Multiple Targets on EM13c

The notifications emails of a “planned” downtime is one of the annoying things of monitoring systems. You forget creating blackout and you start a maintenance work, and you get lots of notifications mails. Most of the time, the target which goes down, also affect other targets so it will multiple the number of unwanted notifications mails. Good thing is, it’s very easy to create blackouts on EM13c. We can do it through web console, emctl or emcli tools. A one-liner is enough for it:

The above code will create a blackout for the all targets on the server. We can achieve the same thing by EMCLI:

If we use emcli, we have more options such as creating repeating blackouts, entering a reason for blackout, enabling blackout for a group of targets (which resides on different hosts).