├── .ruby-version ├── .gitignore ├── bin └── go-celery-api ├── Berksfile ├── Berksfile.lock ├── gomfile ├── config └── config.json.dist ├── metadata.rb ├── Vagrantfile ├── README.md ├── src └── go-celery-api.go └── LICENSE /.ruby-version: -------------------------------------------------------------------------------- 1 | 2.0.0-p481 -------------------------------------------------------------------------------- /.gitignore: -------------------------------------------------------------------------------- 1 | cookbooks/ 2 | .idea/ 3 | .vagrant/ 4 | _vendor/ 5 | ssl/ 6 | -------------------------------------------------------------------------------- /bin/go-celery-api: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/DivideAndConquer/go-celery-api/master/bin/go-celery-api -------------------------------------------------------------------------------- /Berksfile: -------------------------------------------------------------------------------- 1 | # vi: set ft=ruby : 2 | source 'https://api.berkshelf.com' 3 | 4 | metadata 5 | 6 | cookbook 'golang' -------------------------------------------------------------------------------- /Berksfile.lock: -------------------------------------------------------------------------------- 1 | DEPENDENCIES 2 | go-celery-api 3 | path: . 4 | metadata: true 5 | golang 6 | 7 | GRAPH 8 | go-celery-api (1.0.0) 9 | golang (>= 0.0.0) 10 | golang (1.4.0) 11 | -------------------------------------------------------------------------------- /gomfile: -------------------------------------------------------------------------------- 1 | gom 'github.com/streadway/amqp', :commit => 'affa76d059881a8849a73d78ef5629004b9bf1f7' 2 | gom 'github.com/bsphere/celery', :commit => 'eac25ed6f365b79e59065d3631acb17226465e43' 3 | gom 'github.com/ant0ine/go-json-rest', :commit => 'f253ff849ea92000d2e2a9d8cf5f2138f4172213' 4 | -------------------------------------------------------------------------------- /config/config.json.dist: -------------------------------------------------------------------------------- 1 | { 2 | "Cafile" : "/vagrant/ssl/cacert.pem", 3 | "Keyfile" : "/vagrant/ssl/key.pem", 4 | "Certfile" : "/vagrant/ssl/cert.pem", 5 | "Username" : "admin", 6 | "Password" : "admin", 7 | "Host" : "proxy", 8 | "Port" : "5671", 9 | "CN" : "rabbit" 10 | } -------------------------------------------------------------------------------- /metadata.rb: -------------------------------------------------------------------------------- 1 | name 'go-celery-api' 2 | maintainer 'Kyle Boorky' 3 | license 'Apache 2.0' 4 | description 'Golang API for celery task creation' 5 | long_description IO.read(File.join(File.dirname(__FILE__), 'README.md')) 6 | version '1.0.0' 7 | 8 | supports 'ubuntu' 9 | 10 | depends 'golang' 11 | -------------------------------------------------------------------------------- /Vagrantfile: -------------------------------------------------------------------------------- 1 | # -*- mode: ruby -*- 2 | # vi: set ft=ruby : 3 | 4 | VAGRANTFILE_API_VERSION = '2' 5 | 6 | boxes = { 7 | 'go' => { 8 | :box => 'ubuntu1404', 9 | :boxurl => 'http://opscode-vm-bento.s3.amazonaws.com/vagrant/virtualbox/opscode_ubuntu-14.04_chef-provisionerless.box', 10 | :recipes => [ 11 | 'golang', 12 | 'golang::packages' 13 | ], 14 | :json => { 15 | 'go' => { 16 | 'packages' => [ 17 | 'github.com/mattn/gom' 18 | ], 19 | 'owner' => 'vagrant', 20 | 'group' => 'vagrant', 21 | 'gopath' => '/vagrant/_vendor/' 22 | } 23 | } 24 | } 25 | } 26 | 27 | # define servers 28 | servers = [ 29 | { :hostname => 'go', :type => 'go', :primary => true } 30 | ] 31 | 32 | # cookbook path 33 | cookbooks_path = 'cookbooks' 34 | 35 | Vagrant.configure(VAGRANTFILE_API_VERSION) do |config| 36 | 37 | config.omnibus.chef_version = :latest 38 | 39 | # Setup hostmanager config to update the host files 40 | config.hostmanager.enabled = true 41 | config.hostmanager.manage_host = true 42 | config.hostmanager.ignore_private_ip = false 43 | config.hostmanager.include_offline = true 44 | config.vm.provision :hostmanager 45 | 46 | # Forward our SSH Keys into the VM 47 | config.ssh.forward_agent = true 48 | 49 | # Loop through all servers and configure them 50 | servers.each do |server| 51 | config.vm.define server[:hostname], primary: server[:primary] do |node_config| 52 | node_config.vm.box = boxes[server[:type]][:box] 53 | node_config.vm.box_url = boxes[server[:type]][:boxurl] 54 | node_config.vm.hostname = server[:hostname] 55 | node_config.vm.network :private_network, :auto_network => true 56 | node_config.hostmanager.aliases = server[:aliases] 57 | 58 | node_config.vm.provision :chef_solo do |chef| 59 | chef.json = boxes[server[:type]][:json] 60 | chef.cookbooks_path = [cookbooks_path] 61 | 62 | boxes[server[:type]][:recipes].each do |recipe| 63 | chef.add_recipe recipe 64 | end 65 | end 66 | end 67 | end 68 | 69 | # vagrant trigger to get cookbooks and install them in 70 | # cookbook path 71 | [:up, :provision].each do |cmd| 72 | if (File.exist?("#{cookbooks_path}/Berksfile.lock") == false) || (File.exist?("#{cookbooks_path}/Berksfile.lock") == true && FileUtils.compare_file('Berksfile.lock', "#{cookbooks_path}/Berksfile.lock") == false) 73 | config.trigger.before cmd, stdout: true do 74 | info 'Cleaning cookbook directory' 75 | run "rm -rf #{cookbooks_path}" 76 | info 'Installing cookbook dependencies with berkshelf' 77 | run "berks vendor #{cookbooks_path}" 78 | end 79 | end 80 | end 81 | 82 | end 83 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # Go Celery Api 2 | 3 | This is a very simple Rest API that clients to add tasks to a celery queue via a POST request. 4 | 5 | # Vagrant Setup 6 | 7 | ## Celery API 8 | To run the API in a vagrant box , you must have [Vagrant](http://www.vagrantup.com/) and 9 | [VirtualBox](https://www.virtualbox.org/) installed on your machine. You will also need 10 | Chef and Berkshelf, easily installed via [ChefDK](https://downloads.getchef.com/chef-dk/). 11 | 12 | ```sh 13 | git clone https://github.com/divideandconquer/go-celery-api.git 14 | cd go-celery-api 15 | 16 | # Vagrant plugins to manage the network 17 | vagrant plugin install vagrant-auto_network 18 | vagrant plugin install vagrant-hostmanager 19 | vagrant plugin install vagrant-triggers 20 | vagrant plugin install vagrant-omnibus 21 | 22 | vagrant up 23 | ``` 24 | 25 | ## RabbitMQ Cluster 26 | This repository requires the use of a rabbitmq / celery cluster. To set one up follow the 27 | directions for the [rabbitmq-cluster](https://github.com/turbine-web/rabbitmq-cluster) project. 28 | 29 | Once you have the SSL keys generated make sure to copy the `testca/cacert.pem` and the client `key.pem` 30 | and `cert.pem` files into this repo. 31 | 32 | E.G. 33 | 34 | ```sh 35 | cd go-celery-api 36 | mkdir ssl 37 | cp ../rabbitmq-cluster/ssl/testca/cacert.pem ssl/ 38 | cp ../rabbitmq-cluster/ssl/client/key.pem ssl/ 39 | cp ../rabbitmq-cluster/ssl/client/cert.pem ssl/ 40 | ``` 41 | 42 | ## Configuration 43 | The default configuration works with the default configuration of the [rabbitmq-cluster](https://github.com/turbine-web/rabbitmq-cluster). 44 | To override these defaults copy the `config/config.json.dist` file to `config/config.json`, edit the file appropriately 45 | and then use the command line flag `-config=` to tell the go-celery-api to read that configuration. 46 | 47 | The available configuration options are as follows: 48 | * Cafile 49 | * The path to the Certificate Authority cert pem file 50 | * Keyfile 51 | * The path to the client key.pem file 52 | * Certfile 53 | * The path to the client cert.pem file 54 | * Username 55 | * The rabbitmq username 56 | * Password 57 | * The rabbitmq password 58 | * Host 59 | * The rabbitmq dns name / ip address (likely this is the load balancer's host name) 60 | * Port 61 | * The rabbitmq port (5672 or 5671 for ssl) 62 | * CN 63 | * The common name on the SSL certs 64 | 65 | 66 | ## Running the API 67 | Once you have a running rabbitmq / celery cluster, working ssl certs, and a vagrant box running go-celery-api 68 | run the following commands to start the server: 69 | 70 | ```sh 71 | # connect to server 72 | vagrant ssh go 73 | 74 | cd /vagrant 75 | 76 | # run from binary 77 | bin/go-celery-api 78 | 79 | # run from src code 80 | gom install 81 | gom run src/go-celery-api.go 82 | 83 | # you can also pass a configuration file to the go-celery-api: 84 | gom run src/go-celery-api.go -config=./config/config.json 85 | # or from the binary: 86 | bin/go-celery-api -config=./config/config.json 87 | 88 | ``` 89 | Note that in order for the default configuration to work you must add an entry for proxy to your `go` vagrant machine's 90 | `/etc/hosts` file. 91 | 92 | E.G. 93 | 94 | ```sh 95 | # Note that the vagrant auto network plugin may have chosen a different ip for your proxy server. 96 | sudo echo "10.20.1.6 proxy" >> /etc/hosts 97 | ``` 98 | 99 | ## Posting to the API 100 | To POST a task to the API make a POST to http://go:8080/tasks with a JSON body: 101 | 102 | ``` 103 | { 104 | "Name": "tasks.add", // the name of the celery task 105 | "Args": ["4", "8"] // an array of arguments to pass to the celery task 106 | //"Kwargs": {...} //Key value store of kwargs to pass to the celery task 107 | } 108 | ``` 109 | 110 | Using curl the command would look like this: 111 | 112 | ```sh 113 | curl -H "Content-Type: application/json" --data '{"Name": "tasks.add", "Args": ["4", "8"]}' http://go:8080/tasks 114 | ``` 115 | 116 | The if the task was successfully added to the celery queue you will get the following response: 117 | 118 | ``` 119 | { 120 | "Status": "success" 121 | } 122 | ``` 123 | 124 | # License 125 | This module is licensed using the Apache-2.0 License: 126 | 127 | ``` 128 | Copyright (c) 2014, Kyle Boorky 129 | ``` -------------------------------------------------------------------------------- /src/go-celery-api.go: -------------------------------------------------------------------------------- 1 | package main 2 | 3 | import ( 4 | "github.com/ant0ine/go-json-rest/rest" 5 | "github.com/bsphere/celery" 6 | "github.com/streadway/amqp" 7 | "log" 8 | "net/http" 9 | "crypto/tls" 10 | "crypto/x509" 11 | "io/ioutil" 12 | "time" 13 | "os" 14 | "encoding/json" 15 | "flag" 16 | "fmt" 17 | ) 18 | 19 | // -- Main function -- 20 | // Sets up server and Tasks struct, starts listening on 8080 21 | func main() { 22 | //set flags 23 | configFile := flag.String("config", "", "An optional filepath for a config file.") 24 | flag.Parse() 25 | 26 | if *configFile != "" { 27 | log.Printf("configFile: " + *configFile) 28 | } 29 | 30 | //setup tasks 31 | tasks := new(Tasks) 32 | tasks.ConfigFile = *configFile 33 | //load config 34 | tasks.SetupAmqpConnection() 35 | 36 | //setup resource handler and routes 37 | handler := rest.ResourceHandler{ 38 | EnableRelaxedContentType: true, 39 | } 40 | err := handler.SetRoutes( 41 | rest.RouteObjectMethod("POST", "/tasks", tasks, "PostTask"), 42 | ) 43 | if err != nil { 44 | log.Fatal(err) 45 | } 46 | log.Fatal(http.ListenAndServe(":8080", &handler)) 47 | } 48 | 49 | // -- Struct Declarations -- 50 | type Task struct { 51 | Name string 52 | Args []string 53 | Kwargs map[string]interface{} 54 | } 55 | type TaskResult struct { 56 | Status string 57 | } 58 | 59 | type Tasks struct { 60 | Connection *amqp.Connection 61 | Config *TaskConfig 62 | ConfigFile string 63 | } 64 | 65 | type TaskConfig struct { 66 | Uri string 67 | TlsConfig *tls.Config 68 | } 69 | 70 | type MainConfig struct { 71 | Cafile string 72 | Keyfile string 73 | Certfile string 74 | Username string 75 | Password string 76 | Host string 77 | Port string 78 | CN string 79 | } 80 | 81 | // -- Tasks Function Bindings -- 82 | 83 | // Retrieves the configuration from the config json 84 | // builds the TaskConfig object and returns it 85 | func (t *Tasks) GetConfig() *TaskConfig { 86 | 87 | if (t.Config == nil) { 88 | configuration := MainConfig{} 89 | 90 | if _, err := os.Stat(t.ConfigFile); os.IsNotExist(err) == false { 91 | log.Printf("Config file found - loading configuration") 92 | 93 | file, _ := os.Open(t.ConfigFile) 94 | decoder := json.NewDecoder(file) 95 | err := decoder.Decode(&configuration) 96 | if err != nil { 97 | log.Printf("Error decoding configuration: %s\n", err) 98 | } 99 | } else { 100 | //setup defaults 101 | log.Printf("No config file found, using defaults.") 102 | configuration.Cafile = "/vagrant/ssl/cacert.pem" 103 | configuration.Keyfile = "/vagrant/ssl/key.pem" 104 | configuration.Certfile = "/vagrant/ssl/cert.pem" 105 | configuration.Username = "admin" 106 | configuration.Password = "admin" 107 | configuration.Host = "proxy" 108 | configuration.Port = "5671" 109 | configuration.CN = "rabbit" 110 | } 111 | 112 | rootCa, err := ioutil.ReadFile(configuration.Cafile) 113 | if err != nil { panic(err) } 114 | clientKey, err := ioutil.ReadFile(configuration.Keyfile) 115 | if err != nil { panic(err) } 116 | clientCert, err := ioutil.ReadFile(configuration.Certfile) 117 | if err != nil { panic(err) } 118 | 119 | cfg := new(tls.Config) 120 | cfg.RootCAs = x509.NewCertPool() 121 | cfg.RootCAs.AppendCertsFromPEM([]byte(rootCa)) 122 | cfg.ServerName = configuration.CN 123 | 124 | cert, _ := tls.X509KeyPair([]byte(clientCert), []byte(clientKey)) 125 | cfg.Certificates = append(cfg.Certificates, cert) 126 | 127 | result := new(TaskConfig) 128 | result.TlsConfig = cfg 129 | result.Uri = fmt.Sprintf("amqps://%s:%s@%s:%s/", configuration.Username, configuration.Password, configuration.Host, configuration.Port) 130 | t.Config = result 131 | } 132 | return t.Config 133 | } 134 | 135 | // This function will return a amqp channel as well 136 | // as setup the reconnect and retry logic in case 137 | // the server its connected to becomes unavailable. 138 | func (t *Tasks) SetupAmqpConnection() *amqp.Connection { 139 | config := t.GetConfig() 140 | conn, err := amqp.DialTLS(config.Uri, config.TlsConfig) 141 | 142 | //if err retry until connected. 143 | if (err != nil) { 144 | log.Printf("Error Connecting to amqp: %s\n", err) 145 | time.Sleep(1 * time.Second) 146 | conn = t.SetupAmqpConnection() 147 | } else { 148 | log.Printf("Connected to Rabbit") 149 | //Setup Reconnect logic 150 | go func() { 151 | log.Printf("closing: %s \n", <-conn.NotifyClose(make(chan *amqp.Error))) 152 | time.Sleep(1 * time.Second) 153 | conn = t.SetupAmqpConnection() 154 | }() 155 | } 156 | 157 | t.Connection = conn 158 | // return the connection 159 | return conn 160 | } 161 | 162 | // POST http://go:8080/tasks 163 | // {"Name":"]} 164 | // E.G. {"Name": "tasks.add", "Args": ["4", "8"]} 165 | func (t *Tasks) PostTask(w rest.ResponseWriter, r *rest.Request) { 166 | log.Printf("postTask - Received a task.") 167 | task := Task{} 168 | err := r.DecodeJsonPayload(&task) 169 | if err != nil { 170 | log.Printf("postTask - error reading payload.") 171 | rest.Error(w, err.Error(), http.StatusInternalServerError) 172 | } else { 173 | log.Printf("postTask - '%s'", task.Name) 174 | // we have a payload, create the celery task 175 | celeryTask, err := celery.NewTask(task.Name, task.Args, task.Kwargs) 176 | if err != nil { 177 | log.Printf("Could not create celery task: %+v \n", err) 178 | rest.Error(w, "Failed to create the celery task requested.", http.StatusBadRequest) 179 | } else { 180 | //we have created a task, now open a channel 181 | ch , err := t.Connection.Channel() 182 | if err != nil { 183 | log.Printf("Could not open channel: %+v \n", err) 184 | rest.Error(w, "Error connecting to celery", http.StatusInternalServerError) 185 | } else { 186 | //we have a channel so publish the task 187 | defer ch.Close() 188 | err = celeryTask.Publish(ch, "", "celery") 189 | if err != nil { 190 | log.Printf("Could not publish celery task: %+v \n", err) 191 | rest.Error(w, "Error publishing task to celery", http.StatusInternalServerError) 192 | } else { 193 | // Success! 194 | result := TaskResult{"success"} 195 | w.WriteJson(&result) 196 | } 197 | } 198 | } 199 | } 200 | } 201 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | Copyright (c) 2014, Kyle Boorky. 2 | 3 | Apache License 4 | Version 2.0, January 2004 5 | http://www.apache.org/licenses/ 6 | 7 | TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION 8 | 9 | 1. 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