![]() For more information, see Instance console output. Instances built on the Nitro system support the retrieval of the latest serial console output. Note: The posted system (console) log output isn't updated continuously. Nov 13 13:49:59 user-data: + echo 'Hello from user-data! Here are my takeaways from various topics discussed in the podcast. Nov 13 13:49:59 user-data: irqbalance.x86_64 2:1.5.0-2.amzn2.0.1 In the podcast series, Seth Godin’s Startup School, Seth Godin gave a guided tour to a group of highly-motivated early-stage entrepreneurs on some of the questions they will have to dig deep and ask themselves while they build up their business. The following is sample console output: Nov 13 13:49:59 user-data: amazon-ssm-agent.x86_64 0:2.3.2 For more information, see How can I utilize user data to automatically run a script with every restart of my Amazon EC2 Linux instance? ![]() The following is the line that redirects the user-data output: exec >(tee /var/log/user-data.log|logger -t user-data -s 2>/dev/console) 2>&1īy default, user data scripts and cloud-init directives are run only during the first boot when an instance is launched. For information on instances running RHEL 7 or RHEL 8, see How can I log user-data for my EC2 instance running RHEL 7 or RHEL 8 and then ship it to the console logs? ResolutionĮnter the following command to redirect the user-data output console: #!/bin/bash -xeĮxec >(tee /var/log/user-data.log|logger -t user-data -s 2>/dev/console) 2>&1 Note: This resolution is for Amazon Linux and Amazon Linux 2 only. When the code is run, you can see your user-data invocation logs in your console. Third, acknowledge that data collected isn’t always accurate, and consider the costs of acting on data that’s incorrect.To troubleshoot issues on your EC2 instance bootstrap without having to access the instance through SSH, you can add code to your user-data bash script that redirects all the output both to the /var/log/user-data.log and to /dev/console. Second, before you seek to collect data, consider the costs of processing that data. In fact, in many cases, it’s a costly distraction or even a chance to get the important stuff wrong.įirst, don’t collect data unless it has a non-zero chance of changing your actions. The metaphor is pretty clear: more data isn’t always better. If you need the clock in the microwave to tell you whether it’s morning or night, you have bigger problems than a microwave can fix for you. The microwave in my office also reports AM or PM. The clock would do its job far better if there weren’t an AM/PM data bit. That’s as complicated to think through as it is to type, which is my point.īut the bigger takeaway is that AM/PM on a hotel clock is not only useless, it’s a problem waiting to happen. Of course, I failed to note that the tiny ‘pm’ wasn’t showing when I set the alarm, which means when I was setting the alarm, the clock thought it was currently 7 am, and the next morning, when 6 am rolled around, it thought the local time was 6 pm and didn’t bother to ring. ![]() I arrived at my hotel at 7 pm, carefully setting the alarm for 6 am the next morning. The iHome alarm clock, common in hotels, shows a small PM when the time is after 12 noon.
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