Getting started with Kubernetes
Just some of my notes while learning about Kubernetes. I use Google Compute Engine to install mine.
To install Kubernetes, it’s as easy as copy and paste the below command
curl -sS https://get.k8s.io | bash
If you want to customize some default options, you can edit environment variables
curl -sS https://get.k8s.io | MULTIZONE=true KUBERNETES_PROVIDER=gce KUBE_GCE_ZONE=asia-east1-b NUM_NODES=4 bash
There’re more environment variables that you can take a look in
It’s recommended to export it to environment instead of passing it to the command as above as taking the cluster down will be easier.
export KUBERNETES_PROVIDER=gce export KUBE_GCE_ZONE=asia-east1-b export NODE_SIZE=n1-highcpu-2 export MULTIZONE=true export NUM_NODES=2 export KUBE_AUTOSCALER_MIN_NODES=2 export KUBE_AUTOSCALER_MAX_NODES=10 export KUBE_ENABLE_CLUSTER_AUTOSCALER=true export PREEMPTIBLE_NODE=true
Add more nodes to cluster
KUBE_USE_EXISTING_MASTER=true KUBERNETES_PROVIDER=gce KUBE_GCE_ZONE=asia-east1-b NUM_NODES=2 ./kube-up.sh
Bring down cluster
KUBERNETES_PROVIDER=gce KUBE_GCE_ZONE=asia-east1-b ./kube-down.sh
Deploying applications on Kubernetes
We use Docker at work and deploying Docker containers in Kubernetes is a breeze.
docker build -t gcr.io/$PROJECT_ID/app-name:v1 . gcloud docker push gcr.io/$PROJECT_ID/app-name:v1 # update kubectl rolling-update <replication-controller> --image=gcr.io/$PROJECT_ID/app-name:v2
Expose the service to external
kubectl expose deployment <deployment-name> --type="LoadBalancer"
kubectl autoscale rc <replication-controller> --min 3 --max=10 --cpu-percent=60
The state of tiling window manager for OS X
kwm seems to be the best - feature-wise but it requires too many hacking to be done. I’ve given up at some point and just went back with Amethyst. Slate and Hammerspoon aren’t really what I’m looking for.
Myles Borins (@thealphanerd) recently ran citgm with yarn, and shared the results. It was 25 minutes faster than npm, but 20 modules failed to install. Yarn is not a drop in replacement.
Some areas where issues arise:
- Reliance on npm-shrinkwrap.json
- Private modules on npm
- Modules backed by self-signed certificates
- Exotic dependencies declarations like .zip or shorthand urls
- Edge case issues on specific OSes, like Windows
- Pre- and post-script hooks don’t work like they do in npm
- Scripts that rely on npm environmental variables
I’ve just migrated 4 big applications at work from Node.js v4 to Node.js v6 LTS. 3 of them require some little changes and 1 with no changes at all since it’s using Babeljs.
You can view the complete list of breaking changes from v4 to v6 here on GitHub.
This site is now AMP-friendly
The cached version of the page is up at this url below, remove the
s if your site isn’t on HTTPS.
Xbox Scorpio vs PS Neo
If this were true, I will definitely upgrade to Scorpio. The difference in GPU power is huge!!
the world’s smallest (995 bytes) CSS framework http://mincss.com
In an attempt to make my website fast again.
Custom font no more.
How to import csv file in MySQL
If your MySQL server started with
--secure-file-priv option, you will have to move your csv file to that specific folder first.
To check where that folder is, first run
SHOW VARIABLES LIKE "secure_file_priv";
Move your csv file to that folder and issue the following command in MySQL console. Remember to replace
/var/lib/mysql-files/ with your
secure_file_priv path variable.
LOAD DATA INFILE "/var/lib/mysql-files/data.csv" \ INTO TABLE my_table \ COLUMNS TERMINATED BY ',' \ OPTIONALLY ENCLOSED BY '"' \ ESCAPED BY '"' \ LINES TERMINATED BY '\n' \ IGNORE 1 LINES;
TJ Holowaychuk writes about Do and Don’ts of AWS Lambda.
Nixon’s retrospective on Vietnam war, 10 years later.