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// Copyright 2012-2016 Canonical Ltd.
// Licensed under the LGPLv3, see LICENCE file for details.
/*
This is an example on how the Go library gomaasapi can be used to interact with
a real MAAS server.
Note that this is a provided only as an example and that real code should probably do something more sensible with errors than ignoring them or panicking.
*/
package main
import (
"bytes"
"fmt"
"net/url"
"github.com/juju/gomaasapi/v2"
)
var apiKey string
var apiURL string
var apiVersion string
func getParams() {
fmt.Println("Warning: this will create a node on the MAAS server; it should be deleted at the end of the run but if something goes wrong, that test node might be left over. You've been warned.")
fmt.Print("Enter API key: ")
_, err := fmt.Scanf("%s", &apiKey)
if err != nil {
panic(err)
}
fmt.Print("Enter API URL: ")
_, err = fmt.Scanf("%s", &apiURL)
if err != nil {
panic(err)
}
fmt.Print("Enter API version: ")
_, err = fmt.Scanf("%s", &apiVersion)
if err != nil {
panic(err)
}
}
func checkError(err error) {
if err != nil {
panic(err)
}
}
func main() {
getParams()
// Create API server endpoint.
authClient, err := gomaasapi.NewAuthenticatedClient(
gomaasapi.AddAPIVersionToURL(apiURL, apiVersion), apiKey)
checkError(err)
maas := gomaasapi.NewMAAS(*authClient)
// Exercise the API.
ManipulateNodes(maas)
ManipulateFiles(maas)
fmt.Println("All done.")
}
// ManipulateFiles exercises the /api/1.0/files/ API endpoint. Most precisely,
// it uploads a files and then fetches it, making sure the received content
// is the same as the one that was sent.
func ManipulateFiles(maas *gomaasapi.MAASObject) {
files := maas.GetSubObject("files")
fileContent := []byte("test file content")
fileName := "filename"
filesToUpload := map[string][]byte{"file": fileContent}
// Upload a file.
fmt.Println("Uploading a file...")
_, err := files.CallPostFiles("add", url.Values{"filename": {fileName}}, filesToUpload)
checkError(err)
fmt.Println("File sent.")
// Fetch the file.
fmt.Println("Fetching the file...")
fileResult, err := files.CallGet("get", url.Values{"filename": {fileName}})
checkError(err)
receivedFileContent, err := fileResult.GetBytes()
checkError(err)
if bytes.Compare(receivedFileContent, fileContent) != 0 {
panic("Received content differs from the content sent!")
}
fmt.Println("Got file.")
// Fetch list of files.
listFiles, err := files.CallGet("list", url.Values{})
checkError(err)
listFilesArray, err := listFiles.GetArray()
checkError(err)
fmt.Printf("We've got %v file(s)\n", len(listFilesArray))
// Delete the file.
fmt.Println("Deleting the file...")
fileObject, err := listFilesArray[0].GetMAASObject()
checkError(err)
errDelete := fileObject.Delete()
checkError(errDelete)
// Count the files.
listFiles, err = files.CallGet("list", url.Values{})
checkError(err)
listFilesArray, err = listFiles.GetArray()
checkError(err)
fmt.Printf("We've got %v file(s)\n", len(listFilesArray))
}
// ManipulateFiles exercises the /api/1.0/nodes/ API endpoint. Most precisely,
// it lists the existing nodes, creates a new node, updates it and then
// deletes it.
func ManipulateNodes(maas *gomaasapi.MAASObject) {
nodeListing := maas.GetSubObject("nodes")
// List nodes.
fmt.Println("Fetching list of nodes...")
listNodeObjects, err := nodeListing.CallGet("list", url.Values{})
checkError(err)
listNodes, err := listNodeObjects.GetArray()
checkError(err)
fmt.Printf("Got list of %v nodes\n", len(listNodes))
for index, nodeObj := range listNodes {
node, err := nodeObj.GetMAASObject()
checkError(err)
hostname, err := node.GetField("hostname")
checkError(err)
fmt.Printf("Node #%d is named '%v' (%v)\n", index, hostname, node.URL())
}
// Create a node.
fmt.Println("Creating a new node...")
params := url.Values{"architecture": {"i386/generic"}, "mac_addresses": {"AA:BB:CC:DD:EE:FF"}}
newNodeObj, err := nodeListing.CallPost("new", params)
checkError(err)
newNode, err := newNodeObj.GetMAASObject()
checkError(err)
newNodeName, err := newNode.GetField("hostname")
checkError(err)
fmt.Printf("New node created: %s (%s)\n", newNodeName, newNode.URL())
// Update the new node.
fmt.Println("Updating the new node...")
updateParams := url.Values{"hostname": {"mynewname"}}
newNodeObj2, err := newNode.Update(updateParams)
checkError(err)
newNodeName2, err := newNodeObj2.GetField("hostname")
checkError(err)
fmt.Printf("New node updated, now named: %s\n", newNodeName2)
// Count the nodes.
listNodeObjects2, err := nodeListing.CallGet("list", url.Values{})
checkError(err)
listNodes2, err := listNodeObjects2.GetArray()
checkError(err)
fmt.Printf("We've got %v nodes\n", len(listNodes2))
// Delete the new node.
fmt.Println("Deleting the new node...")
errDelete := newNode.Delete()
checkError(errDelete)
// Count the nodes.
listNodeObjects3, err := nodeListing.CallGet("list", url.Values{})
checkError(err)
listNodes3, err := listNodeObjects3.GetArray()
checkError(err)
fmt.Printf("We've got %v nodes\n", len(listNodes3))
}
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