{"id":897,"date":"2019-10-29T16:39:20","date_gmt":"2019-10-29T16:39:20","guid":{"rendered":"https:\/\/thinkcolorful.org\/?p=897"},"modified":"2024-12-13T19:41:10","modified_gmt":"2024-12-13T19:41:10","slug":"cloud-native-with-node-js-docker-and-kubernetes","status":"publish","type":"post","link":"https:\/\/thinkcolorful.org\/?p=897","title":{"rendered":"Cloud Native with Node.js, Docker and Kubernetes"},"content":{"rendered":"\n

I decided to get my hands dirty and use a bunch of technologies I’ve had some exposure to but haven’t tried to setup personally. I began by creating a website with Node.js<\/a> and the Express<\/a> framework for the Node Meetup group I co-organize. It’s a simple website which explains what the group is about, has an events calendar, provides a feedback page and showcases some of the member’s work. Here is the development site<\/a> up and running on my server and here is the gitlab repository where the code lives<\/a>.<\/p>\n\n\n\n\n\n\n\n

From there I created a docker image by going to CloudNativejs.io <\/a>and going to their Docker git repo<\/a> to pull down the Dockerfiles. I tried building the various Dockerfiles to see how each of them worked and used the Dockerfile-run template since it was the leanest option. From there I ran it to check that it worked. I then tagged it to prepare it for publishing and published it on dockerhub<\/a>. Here are the commands I used:<\/p>\n\n\n\n

#build\ndocker build -t nodepghserver-run -f Dockerfile-run .\n#verify that it's a smaller size!\ndocker images\n#run\ndocker run -i -p 3000:3000 -t nodepghserver-run\n#stopped it with ctrl+c\n\n#Tag it\ndocker tag nodepghserver-run nodeserver:1.0.0\n\n#Publish\ndocker login\n#retag image so it lives in your username namespace\ndocker tag nodepghserver-run ephemeralwaves\/nodeserver:1.0.0\n#push\ndocker push ephemeralwaves\/nodepghserver<\/pre><\/div>\n\n\n\n
The next part of my journey involved using Helm and Kubernetes. I installed Microk8s<\/a> by Canonical which was a snap (no pun intended!) and enabled Helm. I got a template Helm chart from  CloudNativejs.io<\/a>‘s Helm repo<\/a>. I got stuck here for about an hour until I realized that the chart was outdated and a pull request was pending that updated the charts (it has since been updated!). <\/p>\n\n\n\n
#install micro8s from https:\/\/microk8s.io\/#quick-start \nsudo snap install microk8s --classic\nsudo microk8s.enable helm\nsudo microk8s.helm init\n\n#get and put helm chart into project folder\ngit clone https:\/\/github.com\/CloudNativeJS\/helm\nmv chart\/ myappfolder\/\n\n#change name of repo in values.yaml\n\n#then go into repo and install\/deploy\nsudo microk8s.helm install --name nodepghserver chart\/nodeserver\n#check with\nsudo microk8s.helm status nodepghserver\n#open browser to yourLocalIPAddress:Port listed in helm status<\/pre><\/div>\n\n\n\n
For seamless upgrades and rollbacks just use the helm rollback and upgrade commands so no up time is lost.<\/p>\n\n\n\n
#seamless upgrade so no downtime!\nsudo microk8s.helm upgrade nodepghserver chart\/nodeserver\n\n#if you need to rollback\n#check history\nsudo microk8s.helm history nodepghserver\n#rolling back to revision 1\nsudo microk8s.helm rollback nodepghserver 1\n<\/pre><\/div>\n\n\n\n
More to come about Prometheus integration<\/a> and health checks<\/a>!<\/p>\n\n\n\n
<\/p>\n","protected":false},"excerpt":{"rendered":"
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