Author Archives: Jethro Carr

The Heating Project

Having gone through three Wellington winters in our home, Lisa and I really didn’t want to make it a fourth this year. Whilst our property is fortunate enough to get a lot of sun during the day, it still can’t … Continue reading

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Wellington Home Automation Hackers

I’m slowly setting up more and more Internet-of-Things stuff in my house and because of my interest in this space I’ve started a Wellington Home Automation Hackers meetup that will meet monthly! If you’re in Wellington and are interested in … Continue reading

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Firewall rules for HomeKit with HomeAssistant

I’ve recently been playing with the popular open source home automation software Home Assistant. One of the nice features of this platform is that it can export most of the devices it manages as HomeKit devices for easy use from … Continue reading

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The bathroom fan debacle

I completed this project a while back and had the images saved up for a blog post – somehow almost a year has gone by since then in a blink of an eye. But anyway, enjoy this delayed update about … Continue reading

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Deep Dive into ECS

I spent a fair bit of time in 2017 re-architecting the¬†carnival.io¬†platform onto Amazon ECS, including working to handle some tricky autoscaling challenges brought on by the nature of the sudden high-load spikes experienced when we deliver push messages to customers. … Continue reading

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Puppet Autosigning & Cloud Recommendations

I was over in Sydney this week attending linux.conf.au 2018 and made a short presentation at the Sysadmin miniconf regarding deploying Puppet in cloud environments. The majority of this talk covers the Puppet autosigning process which is a big potential … Continue reading

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Firebase FCM upstream with Swift on iOS

I’ve been learning a bit of Swift lately in order to write an iOS app for my alarm system. I’m not very good at it yet, but figured I’d write some notes to help anyone else playing with the murky … Continue reading

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MongoDB document depth headache

We ran into a weird problem recently where we were unable to sync a replica set running MongoDB 3.4 when adding new members to the replica set. The sync would begin, but at some point during the sync it would … Continue reading

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MacOS High Sierra unable to free disk space

I recently ran out of disk space on my iMac. After migrating a considerable amount of undesirable data to either the file server or /dev/null, I found that despite my efforts, the amount of free disk space had not increased. … Continue reading

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Access Route53 private zones cross account

Using Route53 private zones can be a great way to maintain a private internal zone for your server infrastructure. However sometimes you may need to share this zone with another VPC in the same or in another AWS account. The … Continue reading

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