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resource_tack_coreos.go
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resource_tack_coreos.go
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package main
import (
"fmt"
"io/ioutil"
"log"
"net/http"
"strings"
"github.com/hashicorp/terraform/helper/schema"
)
const (
urlTemplate = "http://%s.release.core-os.net/amd64-usr/current/coreos_production_ami_%s_%s.txt"
)
func resourceTackCoreos() *schema.Resource {
return &schema.Resource{
Create: resourceTackCoreosCreate,
Read: resourceTackCoreosRead,
Update: resourceTackCoreosUpdate,
Delete: resourceTackCoreosDelete,
Exists: resourceTackCoreosExists,
Schema: map[string]*schema.Schema{
"ami": &schema.Schema{
Type: schema.TypeString,
Computed: true,
Description: "ami",
},
"channel": &schema.Schema{
Type: schema.TypeString,
Required: true,
},
"region": &schema.Schema{
Type: schema.TypeString,
Required: true,
},
"vmtype": &schema.Schema{
Type: schema.TypeString,
Required: true,
},
},
}
}
func resourceTackCoreosCreate(d *schema.ResourceData, m interface{}) (err error) {
log.Println("[INFO] calling create")
ami, err := getAmi(d)
if err != nil {
return
}
d.Set("ami", ami)
id := getId(d)
d.SetId(id)
return
}
func resourceTackCoreosRead(d *schema.ResourceData, m interface{}) (err error) {
log.Println("[INFO] calling read")
return
}
func resourceTackCoreosUpdate(d *schema.ResourceData, m interface{}) error {
return nil
}
func resourceTackCoreosDelete(d *schema.ResourceData, m interface{}) error {
log.Println("[INFO] calling delete")
return nil
}
func resourceTackCoreosExists(d *schema.ResourceData, meta interface{}) (bool, error) {
log.Println("[INFO] calling exists")
return getId(d) == d.Id(), nil
}
func getAmi(d *schema.ResourceData) (ami string, err error) {
c, r, v := getStrings(d)
amiURL := fmt.Sprintf(urlTemplate, c, v, r)
log.Println(amiURL)
resp, err := http.Get(amiURL)
if err != nil {
err = fmt.Errorf("failed to get AMI data: %s: %v", c, err)
return
}
defer resp.Body.Close()
if resp.StatusCode != 200 {
err = fmt.Errorf("failed to get AMI data: %s: invalid status code: %d", c, resp.StatusCode)
return
}
body, err := ioutil.ReadAll(resp.Body)
if err != nil {
return
}
ami = strings.TrimSpace(string(body))
return
}
func getId(d *schema.ResourceData) string {
c, r, v := getStrings(d)
return fmt.Sprintf("%s:%s:%s", c, r, v)
}
func getStrings(d *schema.ResourceData) (string, string, string) {
c := d.Get("channel").(string)
r := d.Get("region").(string)
v := d.Get("vmtype").(string)
return c, r, v
}