11cfc80020
This adds functionality to specify default values directly in resource sets. The idea is that users can create a file called `values.yaml` or `values.json` in a resource set's folder and have all variables specified in that file be automatically merged into the resource set variables with the lowest priority. This fixes #25 This fixes #30 (to a degree) |
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context | ||
example | ||
templater | ||
util | ||
.gitignore | ||
.travis.yml | ||
LICENSE | ||
main.go | ||
README.md |
KonTemplate - A simple Kubernetes templater
I made this tool out of frustration with the available ways to template Kubernetes resource files. All I want out of such a tool is a way to specify lots of resources with placeholders that get filled in with specific values, based on which context (i.e. k8s cluster) is specified.
Overview
KonTemplate lets you describe resources as you normally would in a simple folder structure:
.
├── prod-cluster.yaml
└── some-api
├── deployment.yaml
└── service.yaml
This example has all resources belonging to some-api
(no file naming conventions enforced at all!) in the some-api
folder and the configuration for the cluster prod-cluster
in the corresponding file.
Lets take a short look at prod-cluster.yaml
:
---
context: k8s.prod.mydomain.com
global:
globalVar: lizards
include:
- name: some-api
values:
version: 1.0-0e6884d
importantFeature: true
apiPort: 4567
Those values are then templated into the resource files of some-api
.
Installation
Assuming you have Go configured correctly, you can simply go get github.com/tazjin/kontemplate/...
.
Usage
You must have kubectl
installed to use KonTemplate effectively.
NAME:
kontemplate - simple Kubernetes resource templating
USAGE:
kontemplate [global options] command [command options] [arguments...]
VERSION:
0.0.1
COMMANDS:
template Interpolate and print templates
apply Interpolate templates and run 'kubectl apply'
replace Interpolate templates and run 'kubectl replace'
delete Interpolate templates and run 'kubectl delete'
help, h Shows a list of commands or help for one command
GLOBAL OPTIONS:
--help, -h show help
--version, -v print the version
All options support the same set of extra flags:
OPTIONS:
--file value, -f value Cluster configuration file to use
--include value, -i value Limit templating to explicitly included resource sets
--exclude value, -e value Exclude certain resource sets from templating
Examples:
# Look at output for a specific resource set and check to see if it's correct ...
kontemplate template -f example/prod-cluster.yaml -i some-api
# ... maybe do a dry-run to see what kubectl would do:
kontemplate apply -f example/prod-cluster.yaml --dry-run
# And actually apply it if you like what you see:
kontemplate apply -f example/prod-cluster.yaml