How to add environment variables in Kubernetes config file?
Thanks Markus for the hint link.
I am writing the answer in Go as the original link showed how to do it from command line. The steps are as follows:
- Replace the fields to be modified in the file with something of the form
${X}. In my case e.g. I replacedmy-tokenwith${my-token}and so on. - Here you can set
Xas an environment variable so that your code can access it during runtime. e.g. by doingexport X="abcd"in command line. - Say the file name is
config. - Execute the following code:
package mainimport ( "os" "os/exec")func main() { mytoken := os.Getenv("mytoken") part := fmt.Sprintf("s/${mytoken}/%s/g", mytoken) command := exec.Command("sed", "-i", "", "-e", part, "config") command.Run()}This will do the required replacement during runtime.