Merge pull request #1 from qikiqi/add-apply-dry-runs

Add apply dry-run client&server

README.md

@@ -165,8 +165,11 @@ Examples:
 # Look at output for a specific resource set and check to see if it's correct ...
 kontemplate template example/prod-cluster.yaml -i some-api
 
-# ... maybe do a dry-run to see what kubectl would do:
-kontemplate apply example/prod-cluster.yaml --dry-run
++# ... maybe do an apply dry-run=client to see what kubectl would do:
+ kontemplate apply example/prod-cluster.yaml --dry-run
+
++# ... or maybe do an apply dry-run=server to see what kubectl would do:
++kontemplate apply example/prod-cluster.yaml --dry-run-server
 
 # And actually apply it if you like what you see:
 kontemplate apply example/prod-cluster.yaml

main.go

@@ -45,9 +45,10 @@ var (
  templateFile = template.Arg("file", "Cluster configuration file to use").Required().String()
  templateOutputDir = template.Flag("output", "Output directory in which to save templated files instead of printing them").Short('o').String()
 
- apply = app.Command("apply", "Template resources and pass to 'kubectl apply'")
- applyFile = apply.Arg("file", "Cluster configuration file to use").Required().String()
- applyDryRun = apply.Flag("dry-run", "Print remote operations without executing them").Default("false").Bool()
+ apply = app.Command("apply", "Template resources and pass to 'kubectl apply'")
+ applyFile = apply.Arg("file", "Cluster configuration file to use").Required().String()
+ applyDryRun = apply.Flag("dry-run", "Print remote operations without executing them (--dry-run=client)").Default("false").Bool()
+ applyDryRunServer = apply.Flag("dry-run-server", "Print remote operations without executing them (--dry-run=server)").Default("false").Bool()
 
  replace = app.Command("replace", "Template resources and pass to 'kubectl replace'")
  replaceFile = replace.Arg("file", "Cluster configuration file to use").Required().String()
@@ -147,7 +148,9 @@ func applyCommand() {
  var kubectlArgs []string
 
  if *applyDryRun {
- kubectlArgs = []string{"apply", "-f", "-", "--dry-run"}
+ kubectlArgs = []string{"apply", "-f", "-", "--dry-run=client"}
+ } else if *applyDryRunServer {
+ kubectlArgs = []string{"apply", "-f", "-", "--dry-run=server"}
  } else {
  kubectlArgs = []string{"apply", "-f", "-"}
  }