How to send notes.txt output to a file instead of dumping it to the console? - kubernetes-helm

Question

I want Helm to write the output of notes.txt to a local file instead of just dumping it to the console. I want to write a JSON file that is going to be read by another system (that is going to send a Slack message).
If that is not possible is there a separate Helm command that just outputs notes.txt without having to do a full deploy?
I don't want to have to try to capture and parse it out of the entire deployment output.

Answer 1

helm status <release> will show you the state of a release. This also contains the notes.txt output.
Helm offers the ability to specify the output format of the helm status <release-name> command (doc). So by running:
$> helm status <release> -o json
you will get detailed information about the deployed release in json format:
{
"name": "release",
"info": {
"first_deployed": "..",
"last_deployed": "..",
"deleted": "",
"description": "Install complete",
"status": "deployed",
"notes": "THIS IS THE FIELD YOU WANT"
},
"manifest": "...",
"version": 1,
"namespace": "..."
}
Depending on the shell you're using, you can then directly save the output in a file ( below for bash ):
$> helm status <release> -o json > out.json
Or use other mechanism to further process the json file before saving ( like jq):
$> helm status <release> -o json | jq -r '.info.notes'
...
[ only the notes part of the release ]
...