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node.go
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node.go
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/* Node object/class/whatever it is that Go calls them. */
/*
* Copyright (c) 2013-2014, Jeremy Bingham (<jbingham@gmail.com>)
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
// Package node implements nodes. They do chef-client runs.
package node
import (
"database/sql"
"fmt"
"github.com/ctdk/goiardi/config"
"github.com/ctdk/goiardi/datastore"
"github.com/ctdk/goiardi/indexer"
"github.com/ctdk/goiardi/util"
"net/http"
)
// Node is a basic Chef node, holding the run list and attributes of the node.
type Node struct {
Name string `json:"name"`
ChefEnvironment string `json:"chef_environment"`
RunList []string `json:"run_list"`
JSONClass string `json:"json_class"`
ChefType string `json:"chef_type"`
Automatic map[string]interface{} `json:"automatic"`
Normal map[string]interface{} `json:"normal"`
Default map[string]interface{} `json:"default"`
Override map[string]interface{} `json:"override"`
}
// New makes a new node.
func New(name string) (*Node, util.Gerror) {
/* check for an existing node with this name */
if !util.ValidateDBagName(name) {
err := util.Errorf("Field 'name' invalid")
return nil, err
}
var found bool
if config.UsingDB() {
// will need redone if orgs ever get implemented
var err error
found, err = checkForNodeSQL(datastore.Dbh, name)
if err != nil {
gerr := util.Errorf(err.Error())
gerr.SetStatus(http.StatusInternalServerError)
return nil, gerr
}
} else {
ds := datastore.New()
_, found = ds.Get("node", name)
}
if found {
err := util.Errorf("Node %s already exists", name)
err.SetStatus(http.StatusConflict)
return nil, err
}
/* No node, we make a new one */
node := &Node{
Name: name,
ChefEnvironment: "_default",
ChefType: "node",
JSONClass: "Chef::Node",
RunList: []string{},
Automatic: map[string]interface{}{},
Normal: map[string]interface{}{},
Default: map[string]interface{}{},
Override: map[string]interface{}{},
}
return node, nil
}
// NewFromJSON creates a new node from the uploaded JSON.
func NewFromJSON(jsonNode map[string]interface{}) (*Node, util.Gerror) {
nodeName, nerr := util.ValidateAsString(jsonNode["name"])
if nerr != nil {
return nil, nerr
}
node, err := New(nodeName)
if err != nil {
return nil, err
}
err = node.UpdateFromJSON(jsonNode)
if err != nil {
return nil, err
}
return node, nil
}
// Get a node.
func Get(nodeName string) (*Node, error) {
var node *Node
var found bool
if config.UsingDB() {
var err error
node, err = getSQL(nodeName)
if err != nil {
if err == sql.ErrNoRows {
found = false
} else {
return nil, err
}
} else {
found = true
}
} else {
ds := datastore.New()
var n interface{}
n, found = ds.Get("node", nodeName)
if n != nil {
node = n.(*Node)
}
}
if !found {
err := fmt.Errorf("node '%s' not found", nodeName)
return nil, err
}
return node, nil
}
// UpdateFromJSON updates an existing node with the uploaded JSON.
func (n *Node) UpdateFromJSON(jsonNode map[string]interface{}) util.Gerror {
/* It's actually totally legitimate to save a node with a different
* name than you started with, but we need to get/create a new node for
* it is all. */
nodeName, nerr := util.ValidateAsString(jsonNode["name"])
if nerr != nil {
return nerr
}
if n.Name != nodeName {
err := util.Errorf("Node name %s and %s from JSON do not match.", n.Name, nodeName)
return err
}
/* Validations */
/* Look for invalid top level elements. *We* don't have to worry about
* them, but chef-pedant cares (probably because Chef <=10 stores
* json objects directly, dunno about Chef 11). */
validElements := []string{"name", "json_class", "chef_type", "chef_environment", "run_list", "override", "normal", "default", "automatic"}
ValidElem:
for k := range jsonNode {
for _, i := range validElements {
if k == i {
continue ValidElem
}
}
err := util.Errorf("Invalid key %s in request body", k)
return err
}
var verr util.Gerror
jsonNode["run_list"], verr = util.ValidateRunList(jsonNode["run_list"])
if verr != nil {
return verr
}
attrs := []string{"normal", "automatic", "default", "override"}
for _, a := range attrs {
jsonNode[a], verr = util.ValidateAttributes(a, jsonNode[a])
if verr != nil {
return verr
}
}
jsonNode["chef_environment"], verr = util.ValidateAsFieldString(jsonNode["chef_environment"])
if verr != nil {
if verr.Error() == "Field 'name' nil" {
jsonNode["chef_environment"] = n.ChefEnvironment
} else {
return verr
}
} else {
if !util.ValidateEnvName(jsonNode["chef_environment"].(string)) {
verr = util.Errorf("Field 'chef_environment' invalid")
return verr
}
}
jsonNode["json_class"], verr = util.ValidateAsFieldString(jsonNode["json_class"])
if verr != nil {
if verr.Error() == "Field 'name' nil" {
jsonNode["json_class"] = n.JSONClass
} else {
return verr
}
} else {
if jsonNode["json_class"].(string) != "Chef::Node" {
verr = util.Errorf("Field 'json_class' invalid")
return verr
}
}
jsonNode["chef_type"], verr = util.ValidateAsFieldString(jsonNode["chef_type"])
if verr != nil {
if verr.Error() == "Field 'name' nil" {
jsonNode["chef_type"] = n.ChefType
} else {
return verr
}
} else {
if jsonNode["chef_type"].(string) != "node" {
verr = util.Errorf("Field 'chef_type' invalid")
return verr
}
}
/* and setting */
n.ChefEnvironment = jsonNode["chef_environment"].(string)
n.ChefType = jsonNode["chef_type"].(string)
n.JSONClass = jsonNode["json_class"].(string)
n.RunList = jsonNode["run_list"].([]string)
n.Normal = jsonNode["normal"].(map[string]interface{})
n.Automatic = jsonNode["automatic"].(map[string]interface{})
n.Default = jsonNode["default"].(map[string]interface{})
n.Override = jsonNode["override"].(map[string]interface{})
return nil
}
// Save the node.
func (n *Node) Save() error {
if config.UsingDB() {
if err := n.saveSQL(); err != nil {
return err
}
} else {
ds := datastore.New()
ds.Set("node", n.Name, n)
}
/* TODO Later: excellent candidate for a goroutine */
indexer.IndexObj(n)
return nil
}
// Delete the node.
func (n *Node) Delete() error {
if config.UsingDB() {
if err := n.deleteSQL(); err != nil {
return err
}
} else {
ds := datastore.New()
ds.Delete("node", n.Name)
}
indexer.DeleteItemFromCollection("node", n.Name)
return nil
}
// GetList gets a list of the nodes on this server.
func GetList() []string {
var nodeList []string
if config.UsingDB() {
nodeList = getListSQL()
} else {
ds := datastore.New()
nodeList = ds.GetList("node")
}
return nodeList
}
// GetFromEnv returns all nodes that belong to the given environment.
func GetFromEnv(envName string) ([]*Node, error) {
if config.UsingDB() {
return getNodesInEnvSQL(envName)
}
var envNodes []*Node
nodeList := GetList()
for _, n := range nodeList {
chefNode, _ := Get(n)
if chefNode == nil {
continue
}
if chefNode.ChefEnvironment == envName {
envNodes = append(envNodes, chefNode)
}
}
return envNodes, nil
}
// GetName returns the node's name.
func (n *Node) GetName() string {
return n.Name
}
// URLType returns the base element of a node's URL.
func (n *Node) URLType() string {
return "nodes"
}
/* Functions to support indexing */
// DocID returns the node's name.
func (n *Node) DocID() string {
return n.Name
}
// Index tells the indexer where the node should go.
func (n *Node) Index() string {
return "node"
}
// Flatten a node for indexing.
func (n *Node) Flatten() []string {
flatten := util.FlattenObj(n)
indexified := util.Indexify(flatten)
return indexified
}
// AllNodes returns all the nodes on the server
func AllNodes() []*Node {
var nodes []*Node
if config.UsingDB() {
nodes = allNodesSQL()
} else {
nodeList := GetList()
for _, n := range nodeList {
no, err := Get(n)
if err != nil {
continue
}
nodes = append(nodes, no)
}
}
return nodes
}