49 lines
3.2 KiB
Markdown
49 lines
3.2 KiB
Markdown
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---
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title: "dbv Alpha Release"
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date: 2022-12-28T21:21:30-08:00
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draft: false
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tags: [golang, dvb]
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---
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So, last month one of my Linux servers failed and I was unable to recover the VM. I was lucky that the data cared about stored on a mobile device! Of my containers, the one running my webdav instance was the one I didnt want to lose any data. With that scare, I wanted to address my backup solution, or lack of. So one thing I wanted to do was build a new tool to backup my docker data.
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I had a couple of requirements for this process
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- Be able to mount the volumes on the container.
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- Tar the data and append a date value of when it was made.
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- Be able to start/stop the container.
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- Post to Discord so I can monitor the jobs.
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- Be able to extend the process later.
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This all started as a PowerShell (pwsh) script but started to run into small issues. I like pwsh for when it can be used. But when I started to build out my logic things just quickly became very messy. Overall, I like to organize my code in logical ways. Pwsh wants you to make modules or you have to dot source files into your script. This gets very messy, quickly. I also didn't want to have to install pwsh on all my servers.
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So I took a look at rebuilding the process in Go. This was my first attempt at getting Go to interface with a CLI but overall, it works rather well. When working with Docker you are able to adjust the `docker container inspect` command so it can return a subset of data. I adjusted the statement that I would send and get the block that has the container status. With the data comming in as json, I am able to quickly be able to convert that into Go stucts so I can manipulate the data as needed.
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One thing that did come up with using the CLI as my primary interface. Using a const to hold the main block of my CLI command was great! I have not used const like values much in other languages but man, Go has really changed my tune about them.
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You might ask yourself, why not use the Docker API? I didn't want to change anything on the servers and keep the API locked up as is. So this got me playing with the [script](https://github.com/bitfield/script) package. I wanted to run some tests to see if I can make Go a scripting language. For the most part, it can. My tool just grew.
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So, with this alpha release, the tool does some basic things for me.
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- Backup multiple containers
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- Move them to my NFS server
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- Ensure that I only have so many files on the server
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- Send notifications to Discord
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Given its a basic tool, it does what I want currently. I do have some more plans for it though.
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- Run the job as a always on job.
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- Setup internal cron triggers.
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- Backup data outside of Docker
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- Postgres running on a VM
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- Move data to a FTP server. (thanks nas!)
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- Sometimes NFS mounts stop working and I need remount the drives
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- Maybe other notification services.
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- Setup systemd service
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I didnt have plans for this to replace everything backup related. This it does what it needs to and stays out of the way.
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If you want to check out the repo, it can be found [here](https://github.com/jtom38/dvb)!
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Thanks for reading!
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If you want to leave a comment, go here [Comments (github)](https://github.com/jtom38/jtom38.github.io/issues/3)
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