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set dynamic values with kubernetes yaml file

DreamCoder answered on February 25, 2022 Popularity 1/10 Helpfulness 1/10

answer set dynamic values with kubernetes yaml file

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set dynamic values with kubernetes yaml file

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cat $app/deployment.yaml | envsubst | kubectl apply ...

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Source: stackoverflow.com

Tags: dynamic-values file kubernetes set shell yaml

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Contributed on Feb 25 2022

DreamCoder

0 Answers Avg Quality 2/10

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set dynamic values with kubernetes yaml file

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#!/bin/bash

# sample value for your variables
MYVARVALUE="nginx:latest"

# read the yml template from a file and substitute the string 
# {{MYVARNAME}} with the value of the MYVARVALUE variable
template=`cat "deploy.yml.template" | sed "s/{{MYVARNAME}}/$MYVARVALUE/g"`

# apply the yml with the substituted value
echo "$template" | kubectl apply -f -

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Source: stackoverflow.com

Tags: dynamic-values set yaml shell kubernetes file

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Contributed on Feb 25 2022

DreamCoder

0 Answers Avg Quality 2/10

set dynamic values with kubernetes yaml file

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envsubst < deployment.yaml | kubectl apply -f -

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Source: stackoverflow.com

Tags: shell dynamic-values yaml file kubernetes set

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Contributed on Mar 09 2022

DreamCoder

0 Answers Avg Quality 2/10

set dynamic values with kubernetes yaml file

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This kind of thing is painfully easy with ytt:

deployment.yml

#@ load("@ytt:data", "data")
---
apiVersion: extensions/v1beta1
kind: Deployment
metadata:
  name: guestbook
spec:
  replicas: 2
  template:
    metadata:
      labels:
        app: guestbook
      spec:
        container:
          - name: guestbook
            image: #@ data.values.image
values.yml

#@data/values
image: nginx@sha256:fe2fa7bb1ceb86c6d9c935bc25c3dd8cbd64f2e95ed5b894f93ae7ffbd1e92bb
Then...

$ ytt -f deployment.yml -f values.yml | kubectl apply -f -
or even better, use ytt's cousin, kapp for a high-control deployment experience:

$ ytt -f deployment.yml -f values.yml | kapp deploy -a guestbook -f -

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Source: stackoverflow.com

Tags: file shell kubernetes yaml dynamic-values set

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Contributed on Mar 09 2022

DreamCoder

0 Answers Avg Quality 2/10

set dynamic values with kubernetes yaml file

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My approach:

tools/jinja2-cli.py:

#!/usr/bin/env python3
import os
import sys
from jinja2 import Environment, FileSystemLoader

sys.stdout.write(Environment(loader=FileSystemLoader('templates/')).from_string(sys.stdin.read()).render(env=os.environ) + "\n")
Make rule:

_GENFILES = $(basename $(TEMPLATES))
GENFILES = $(_GENFILES:templates/%=%)

$(GENFILES): %: templates/%.j2 $(MKFILES) tools/jinja2-cli.py .env
        env $$(cat .env | xargs) tools/jinja2-cli.py < $< > $@ || (rm -f $@; false)
Inside the .j2 template file you can use any jinja syntax construct, e.g. {{env.GUEST}} will be replaced by the value of GUEST defined in .env

So your templates/deploy.yaml.j2 would look like:

apiVersion: extensions/v1beta1
kind: Deployment
metadata:
  name: guestbook
spec:
  replicas: 2
  template:
    metadata:
      labels:
        app: guestbook
      spec:
        container:
          - name: guestbook
            image: {{env.GUEST}}
Another approach (using just bash builtins and xargs) might be

env $(cat .env | xargs) cat <<EOF | kubectl create -f -
apiVersion: extensions/v1beta1
kind: Deployment
metadata:
  name: guestbook
spec:
  replicas: 2
  template:
    metadata:
      labels:
        app: guestbook
      spec:
        container:
          - name: guestbook
            image: ${GUEST}
EOF

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Source: stackoverflow.com

Tags: file shell dynamic-values kubernetes yaml set

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Contributed on Mar 09 2022

DreamCoder

0 Answers Avg Quality 2/10

set dynamic values with kubernetes yaml file

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I have been using kubetpl (https://github.com/shyiko/kubetpl)

It has three different template flavors and supports ConfigMap/Secret freezing.

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Source: stackoverflow.com

Tags: file kubernetes set shell yaml dynamic-values

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Contributed on Mar 09 2022

DreamCoder

0 Answers Avg Quality 2/10

set dynamic values with kubernetes yaml file

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1

I create a script called kubectl_apply. It loads variables from .env, replace ${CUSTOMVAR} in yml and pass it to kubectl command

  #!/bin/bash
  set -a
  source .env
  set +a
  eval "cat <<EOF
  $(<$1)
  EOF
  " | kubectl apply -f -

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Source: stackoverflow.com

Tags: yaml dynamic-values file kubernetes set shell

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Contributed on Mar 09 2022

DreamCoder

0 Answers Avg Quality 2/10

set dynamic values with kubernetes yaml file

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set dynamic values with kubernetes yaml file

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set dynamic values with kubernetes yaml file

set dynamic values with kubernetes yaml file

set dynamic values with kubernetes yaml file

set dynamic values with kubernetes yaml file

set dynamic values with kubernetes yaml file

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