class Kubeclient::ExecCredentials
An exec-based client auth provide kubernetes.io/docs/reference/access-authn-authz/authentication/#configuration Inspired by github.com/kubernetes/client-go/blob/master/plugin/pkg/client/auth/exec/exec.go
Public Class Methods
token(opts)
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# File lib/kubeclient/exec_credentials.rb, line 9 def token(opts) require 'open3' require 'json' raise ArgumentError, 'exec options are required' if opts.nil? cmd = opts['command'] args = opts['args'] env = map_env(opts['env']) # Validate exec options validate_opts(opts) out, err, st = Open3.capture3(env, cmd, *args) raise "exec command failed: #{err}" unless st.success? creds = JSON.parse(out) validate_credentials(opts, creds) creds['status']['token'] end
Private Class Methods
map_env(env)
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Transform name/value pairs to hash
# File lib/kubeclient/exec_credentials.rb, line 53 def map_env(env) return {} unless env Hash[env.map { |e| [e['name'], e['value']] }] end
validate_credentials(opts, creds)
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# File lib/kubeclient/exec_credentials.rb, line 37 def validate_credentials(opts, creds) # out should have ExecCredential structure raise 'invalid credentials' if creds.nil? # Verify apiVersion? api_version = opts['apiVersion'] if api_version && api_version != creds['apiVersion'] raise "exec plugin is configured to use API version #{api_version}, " \ "plugin returned version #{creds['apiVersion']}" end raise 'exec plugin didn\'t return a status field' if creds['status'].nil? raise 'exec plugin didn\'t return a token' if creds['status']['token'].nil? end
validate_opts(opts)
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# File lib/kubeclient/exec_credentials.rb, line 33 def validate_opts(opts) raise KeyError, 'exec command is required' unless opts['command'] end