115 lines
2.9 KiB
Go
115 lines
2.9 KiB
Go
package main
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import (
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"flag"
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"fmt"
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"log"
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"os"
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"github.com/coreos/coreos-cloudinit/datasource"
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"github.com/coreos/coreos-cloudinit/initialize"
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"github.com/coreos/coreos-cloudinit/system"
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)
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const version = "0.7.3"
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func init() {
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//Removes timestamp since it is displayed already during booting
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log.SetFlags(0)
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}
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func main() {
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var printVersion bool
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flag.BoolVar(&printVersion, "version", false, "Print the version and exit")
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var ignoreFailure bool
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flag.BoolVar(&ignoreFailure, "ignore-failure", false, "Exits with 0 status in the event of malformed input from user-data")
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var file string
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flag.StringVar(&file, "from-file", "", "Read user-data from provided file")
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var url string
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flag.StringVar(&url, "from-url", "", "Download user-data from provided url")
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var useProcCmdline bool
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flag.BoolVar(&useProcCmdline, "from-proc-cmdline", false, fmt.Sprintf("Parse %s for '%s=<url>', using the cloud-config served by an HTTP GET to <url>", datasource.ProcCmdlineLocation, datasource.ProcCmdlineCloudConfigFlag))
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var workspace string
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flag.StringVar(&workspace, "workspace", "/var/lib/coreos-cloudinit", "Base directory coreos-cloudinit should use to store data")
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var sshKeyName string
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flag.StringVar(&sshKeyName, "ssh-key-name", initialize.DefaultSSHKeyName, "Add SSH keys to the system with the given name")
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flag.Parse()
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if printVersion == true {
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fmt.Printf("coreos-cloudinit version %s\n", version)
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os.Exit(0)
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}
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var ds datasource.Datasource
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if file != "" {
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ds = datasource.NewLocalFile(file)
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} else if url != "" {
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ds = datasource.NewMetadataService(url)
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} else if useProcCmdline {
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ds = datasource.NewProcCmdline()
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} else {
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fmt.Println("Provide one of --from-file, --from-url or --from-proc-cmdline")
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os.Exit(1)
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}
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log.Printf("Fetching user-data from datasource of type %q", ds.Type())
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userdataBytes, err := ds.Fetch()
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if err != nil {
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log.Printf("Failed fetching user-data from datasource: %v", err)
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if ignoreFailure {
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os.Exit(0)
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} else {
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os.Exit(1)
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}
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}
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if len(userdataBytes) == 0 {
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log.Printf("No user data to handle, exiting.")
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os.Exit(0)
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}
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env := initialize.NewEnvironment("/", workspace)
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userdata := string(userdataBytes)
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userdata = env.Apply(userdata)
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parsed, err := initialize.ParseUserData(userdata)
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if err != nil {
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log.Printf("Failed parsing user-data: %v", err)
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if ignoreFailure {
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os.Exit(0)
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} else {
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os.Exit(1)
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}
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}
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err = initialize.PrepWorkspace(env.Workspace())
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if err != nil {
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log.Fatalf("Failed preparing workspace: %v", err)
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}
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switch t := parsed.(type) {
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case initialize.CloudConfig:
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err = initialize.Apply(t, env)
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case system.Script:
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var path string
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path, err = initialize.PersistScriptInWorkspace(t, env.Workspace())
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if err == nil {
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var name string
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name, err = system.ExecuteScript(path)
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initialize.PersistUnitNameInWorkspace(name, workspace)
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}
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}
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if err != nil {
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log.Fatalf("Failed resolving user-data: %v", err)
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}
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}
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