I try to my custom chart's values.yaml change with overridevalue.yaml to override values. However when I install the chart with helm repo add command and try to reach values yaml it throws me "values.yaml does not exist in ".".
Helm automatically uses values.yaml file from chart's root directory.
you can pass additional values or override existing ones by passing the file during installation:
$ helm install -f override_values.yaml app ./app
you can pass multiple -f <values_yaml> .. ... The priority will be given to the last (right-most) file specified for overriding existing values.
Related
I am currently trying to test some changes, specifically to see if a chart picks up/inherits changes from a top level values file. This top level values file should override any settings in the values file for this chart. To test this, I am trying to use the following command:
helm template --values path/to/top/level/values.yaml path/to/chart > output.yaml
However, when viewing the output for this, the chart still retains the values defined in the chart, and not the values that have been set in the top level values file.
I have tried a number of variations of this command, such as:
helm template path/to/chart --values path/to/top/level/values.yaml > output.yaml
helm template -f path/to/chart/values.yaml --values path/to/top/level/values.yaml > output.yaml
helm template path/to/top/level/values.yaml --values path/to/chart > output.yaml
Am I using this command correctly? Is what I am trying to achieve only possible when doing a helm install or upgrade? e.g. https://all.docs.genesys.com/PrivateEdition/Current/PEGuide/HelmOverrides
Overriding values from a parent (you call it top-level) chart mychart works like a charm and exactly as described in the Helm docs.
A values.yaml in folder mychart/charts/mysubchart
dessert: cake
can be overriden by a values.yaml in folder mychart
mysubchart:
dessert: ice cream
Any directives inside of the mysubchart section will be sent to the mysubchart chart.
Rendering the parent (top-level) chart works like that:
helm template mychart -f mychart/values.yaml
What if what you want is to combine from 2 yaml files, is it possible?
Example:
values.yaml:
blackBoxSidecar:
enabled: true
targets:
- target: esb:443
module: tcp_connect
values-namespace.yaml:
blackBoxSidecar:
targets:
- target: rabbitmq-namespace:443
module: tcp_connect
What I want to get is:
blackBoxSidecar:
enabled: true
targets:
- target: esb:443
module: tcp_connect
- target: rabbitmq-namespace:443
module: tcp_connect
I have a downloaded file through helm inspect called sftp.yaml
I have a parameter in that sftp.yaml file:-
sftp:
allowedMACs: "hmac-sha2-512"
allowedCiphers: aes256-ctr
Now if i install the corresponding helm chart after commenting out the entire line of "allowedMACs" from custom values files i.e. "sftp.yaml", then K8s takes the delta of sftp.yaml and the actual values.yaml and then use values.yaml's "allowedMACs".
However What i want is if "allowedMACs" line is commented in "sftp.yaml" custom values file, then it should not set the env variable at all, or sets it as null.
presently my deployment file's env section looks like
- name: MACs
value: {{ default "" .Values.sftp.allowedMACs | quote }}
You need to either override (with new value) or unset the value, if you only comment out the section you are not doing any of the above and the default value is going to be used.
Basically you are looking to unset a default value. As per banzaicloud example this can be done like so:
helm install stable/chart-name --set sftp.allowedMACs=null
You can also use override value file in a similar way:
sftp:
allowedMACs: null
allowedCiphers: aes256-ctr
This is available in Helm since version 2.6. If you like in-depth information you can review the issue and the subsequent PR that introduced the feature.
yeah I think helm would retrieve values from all values files, so if allowedMACs is in one of those it'll get populated. If this parameter is affected only by sftp.yaml file should it really belong only to it and would i make sense to remove it from main values.yaml?
I have ~20 yamls in my helm chart + tons of dependencies and I want to check the rendered output of the specific one. helm template renders all yamls and produces a hundred lines of code. Is there a way (it would be nice to have even a regex) to render only selected template (by a file or eg. a name).
From helm template documentation
-s, --show-only stringArray only show manifests rendered from the given templates
For rendering only one resource use helm template -s templates/deployment.yaml .
If you have multiple charts in one directory:
|helm-charts
|-chart1
|--templates
|---deployment.yaml
|--values.yaml
|--Chart.yaml
|...
|- chart2
If you want to generate only one file e.g. chart1/deployment.yaml using values from file chart1/values.yaml follow these steps:
Enter to the chart folder:
cd chart1
Run this command:
helm template . --values values.yaml -s templates/deployment.yaml --name-template myReleaseName > chart1-deployment.yaml
Generated manifest will be inside file chart1-deployment.yaml.
I want to pass a certificate to the helm chart and currently I am passing using --set-file global.dbValues.dbcacertificate=./server.crt but instead i want to pass the file in values file of helm chart.
The Values.yaml file reads
global:
dbValues:
dbcacertificate: <Some Way to pass the .crt file>
According to the relevant documentation, one must pre-process a file that is external to the chart into a means that can be provided via --set or --values, since .Files.Get cannot read file paths that are external to the chart bundle.
So, given the following example template templates/secret.yaml containing:
apiVersion: v1
kind: Secret
data:
dbcacertificate: {{ .Values.dbcacertificate | b64enc }}
one can use shell interpolation as:
helm template --set dbcacertificate="$(cat ./server.crt)" .
or, if shell interpolation is not suitable for your circumstances, you can pre-process the certificate into a yaml compatible format and feed it in via --values:
$ { echo "dbcacertificate: |"; sed -e 's/^/ /' server.crt; } > ca-cert.yaml
$ helm template --values ./ca-cert.yaml .
Below is Helm code to install
helm install coreos/kube-prometheus --name kube-prometheum --namespace monitoring -f kube-prometheus.yml
by this way we can override the value.yml values with the values present in kube-prometheus.yml.
Is there any way by which we can first install and then update the value.yml from kube-prometheus.yml file.
I can use helm upgrade releasename kube-prometheumafter changing the value.yml file directly. I don't want that
Use case:
Initially, I used an image with tag 1.0 in value.yml. Now I have below code in kube-prometheus.yml just to update the image tag
prometheusconfigReloader:
image:
tag: 2.0
Instead of deleting and creating again. I want to upgrade it. This is just for example, there could be multiple values. that is why I can't use -set.
So you first run helm install coreos/kube-prometheus --name kube-prometheum --namespace monitoring -f kube-prometheus.yml with your values file set to point at 1.0 of the image:
prometheusconfigReloader:
image:
tag: 1.0
Then you change the values file or create a new values file or even create a new values file containing:
prometheusconfigReloader:
image:
tag: 2.0
Let's say this file is called kube-prometheus-v2.yml Then you can run:
helm upgrade -f kube-prometheus-v2.yml kube-prometheum coreos/kube-prometheus
Or even:
helm upgrade -f kube-prometheus.yml -f kube-prometheus-v2.yml kube-prometheum coreos/kube-prometheus
This is because both values file overrides will be overlaid and according to the helm upgrade documentation "priority will be given to the last (right-most) value specified".
Or if you've already installed and want to find out what the values file that was used contained then you can use helm get values kube-prometheum