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September 3, 2023 06:32
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Extract certificate from the kubernetes config.
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require 'optparse' | |
require 'yaml' | |
require 'base64' | |
options = { | |
config_path: File.join(ENV['HOME'], '.kube', 'config'), | |
write_dir: File.join(ENV['HOME'], '.kube') | |
} | |
OptionParser.new do |opts| | |
opts.banner = "Usage: extract_crt.rb [options]" | |
opts.on('-s', '--source FILE_PATH', 'Path to the kube config') { |v| options[:config_path] = v } | |
opts.on('-d', '--destination DIR', 'Path to directory where save key and certs') { |v| options[:write_dir] = v } | |
end.parse! | |
kube_path = options[:write_dir] | |
file_config = File.read options[:config_path] | |
config = YAML.load file_config | |
ca = Base64.decode64 config["clusters"][0]["cluster"]["certificate-authority-data"] | |
File.open(File.join(kube_path, 'ca.crt'), File::CREAT|File::TRUNC|File::RDWR, 0644) do |f| | |
f.write(ca) | |
end | |
client_crt = Base64.decode64 config["users"][0]["user"]["client-certificate-data"] | |
File.open(File.join(kube_path, 'kubecfg.crt'), File::CREAT|File::TRUNC|File::RDWR, 0644) do |f| | |
f.write(client_crt) | |
end | |
client_key = Base64.decode64 config["users"][0]["user"]["client-key-data"] | |
File.open(File.join(kube_path, 'kubecfg.key'), File::CREAT|File::TRUNC|File::RDWR, 0644) do |f| | |
f.write(client_key) | |
end |
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#!/bin/bash | |
# Would ask for password to encrypt the key | |
openssl pkcs12 -export -clcerts -inkey ~/.kube/kubecfg.key -in ~/.kube/kubecfg.crt -out ~/.kube/kubecfg.p12 -name "kubernetes-client" | |
open ~/.kube/kubecfg.p12 |
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A small update with the user part... thanks for your valuable inputs...
For Windows user