terraform/builtin/providers/aws/resource_aws_instance.go

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package aws
import (
"crypto/sha1"
"encoding/hex"
"fmt"
"log"
"strings"
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"time"
"github.com/hashicorp/terraform/helper/hashcode"
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"github.com/hashicorp/terraform/helper/resource"
"github.com/hashicorp/terraform/helper/schema"
"github.com/hashicorp/terraform/terraform"
"github.com/mitchellh/goamz/ec2"
)
/*
PreProcess: map[string]diff.PreProcessFunc{
"user_data": func(v string) string {
hash := sha1.Sum([]byte(v))
return hex.EncodeToString(hash[:])
},
},
}
*/
func resourceAwsInstance() *schema.Resource {
return &schema.Resource{
Create: resourceAwsInstanceCreate,
Read: resourceAwsInstanceRead,
Update: resourceAwsInstanceUpdate,
Delete: resourceAwsInstanceDelete,
Schema: map[string]*schema.Schema{
"ami": &schema.Schema{
Type: schema.TypeString,
Required: true,
ForceNew: true,
},
"associate_public_ip_address": &schema.Schema{
Type: schema.TypeBool,
Optional: true,
ForceNew: true,
},
"availability_zone": &schema.Schema{
Type: schema.TypeString,
Optional: true,
Computed: true,
ForceNew: true,
},
"instance_type": &schema.Schema{
Type: schema.TypeString,
Required: true,
ForceNew: true,
},
"key_name": &schema.Schema{
Type: schema.TypeString,
Optional: true,
ForceNew: true,
Computed: true,
},
"subnet_id": &schema.Schema{
Type: schema.TypeString,
Optional: true,
Computed: true,
ForceNew: true,
},
"private_ip": &schema.Schema{
Type: schema.TypeString,
Optional: true,
Computed: true,
},
"source_dest_check": &schema.Schema{
Type: schema.TypeBool,
Optional: true,
},
"user_data": &schema.Schema{
Type: schema.TypeString,
Optional: true,
ForceNew: true,
StateFunc: func(v interface{}) string {
switch v.(type) {
case string:
hash := sha1.Sum([]byte(v.(string)))
return hex.EncodeToString(hash[:])
default:
return ""
}
},
},
"security_groups": &schema.Schema{
Type: schema.TypeSet,
Optional: true,
Elem: &schema.Schema{Type: schema.TypeString},
Set: func(v interface{}) int {
return hashcode.String(v.(string))
},
},
"public_dns": &schema.Schema{
Type: schema.TypeString,
Computed: true,
},
"public_ip": &schema.Schema{
Type: schema.TypeString,
Computed: true,
},
"private_dns": &schema.Schema{
Type: schema.TypeString,
Computed: true,
},
},
}
}
func resourceAwsInstanceCreate(d *schema.ResourceData, meta interface{}) error {
p := meta.(*ResourceProvider)
ec2conn := p.ec2conn
// Figure out user data
userData := ""
if v := d.Get("user_data"); v != nil {
userData = v.(string)
}
associatePublicIPAddress := false
if v := d.Get("associate_public_ip_addresss"); v != nil {
associatePublicIPAddress = v.(bool)
}
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// Build the creation struct
runOpts := &ec2.RunInstances{
ImageId: d.Get("ami").(string),
AvailZone: d.Get("availability_zone").(string),
InstanceType: d.Get("instance_type").(string),
KeyName: d.Get("key_name").(string),
SubnetId: d.Get("subnet_id").(string),
PrivateIPAddress: d.Get("private_ip").(string),
AssociatePublicIpAddress: associatePublicIPAddress,
UserData: []byte(userData),
}
if v := d.Get("security_groups"); v != nil {
for _, v := range v.(*schema.Set).List() {
str := v.(string)
var g ec2.SecurityGroup
if runOpts.SubnetId != "" {
g.Id = str
} else {
g.Name = str
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}
runOpts.SecurityGroups = append(runOpts.SecurityGroups, g)
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}
}
// Create the instance
log.Printf("[DEBUG] Run configuration: %#v", runOpts)
runResp, err := ec2conn.RunInstances(runOpts)
if err != nil {
return fmt.Errorf("Error launching source instance: %s", err)
}
instance := &runResp.Instances[0]
log.Printf("[INFO] Instance ID: %s", instance.InstanceId)
// Store the resulting ID so we can look this up later
d.SetId(instance.InstanceId)
// Wait for the instance to become running so we can get some attributes
// that aren't available until later.
log.Printf(
"[DEBUG] Waiting for instance (%s) to become running",
instance.InstanceId)
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stateConf := &resource.StateChangeConf{
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Pending: []string{"pending"},
Target: "running",
Refresh: InstanceStateRefreshFunc(ec2conn, instance.InstanceId),
Timeout: 10 * time.Minute,
Delay: 10 * time.Second,
MinTimeout: 3 * time.Second,
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}
instanceRaw, err := stateConf.WaitForState()
if err != nil {
return fmt.Errorf(
"Error waiting for instance (%s) to become ready: %s",
instance.InstanceId, err)
}
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instance = instanceRaw.(*ec2.Instance)
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// Initialize the connection info
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d.SetConnInfo(map[string]string{
"type": "ssh",
"host": instance.PublicIpAddress,
})
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// Set our attributes
if err := resourceAwsInstanceRead(d, meta); err != nil {
return err
}
// Update if we need to
return resourceAwsInstanceUpdate(d, meta)
}
func resourceAwsInstanceUpdate(d *schema.ResourceData, meta interface{}) error {
p := meta.(*ResourceProvider)
ec2conn := p.ec2conn
modify := false
opts := new(ec2.ModifyInstance)
if d.HasChange("source_dest_check") {
opts.SourceDestCheck = d.Get("source_dest_check").(bool)
opts.SetSourceDestCheck = true
}
if modify {
log.Printf("[INFO] Modifing instance %s: %#v", d.Id(), opts)
if _, err := ec2conn.ModifyInstance(d.Id(), opts); err != nil {
return err
}
// TODO(mitchellh): wait for the attributes we modified to
// persist the change...
}
return nil
}
func resourceAwsInstanceDelete(d *schema.ResourceData, meta interface{}) error {
p := meta.(*ResourceProvider)
ec2conn := p.ec2conn
log.Printf("[INFO] Terminating instance: %s", d.Id())
if _, err := ec2conn.TerminateInstances([]string{d.Id()}); err != nil {
return fmt.Errorf("Error terminating instance: %s", err)
}
log.Printf(
"[DEBUG] Waiting for instance (%s) to become terminated",
d.Id())
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stateConf := &resource.StateChangeConf{
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Pending: []string{"pending", "running", "shutting-down", "stopped", "stopping"},
Target: "terminated",
Refresh: InstanceStateRefreshFunc(ec2conn, d.Id()),
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Timeout: 10 * time.Minute,
Delay: 10 * time.Second,
MinTimeout: 3 * time.Second,
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}
_, err := stateConf.WaitForState()
if err != nil {
return fmt.Errorf(
"Error waiting for instance (%s) to terminate: %s",
d.Id(), err)
}
d.SetId("")
return nil
}
func resourceAwsInstanceRead(d *schema.ResourceData, meta interface{}) error {
p := meta.(*ResourceProvider)
ec2conn := p.ec2conn
resp, err := ec2conn.Instances([]string{d.Id()}, ec2.NewFilter())
if err != nil {
// If the instance was not found, return nil so that we can show
// that the instance is gone.
if ec2err, ok := err.(*ec2.Error); ok && ec2err.Code == "InvalidInstanceID.NotFound" {
d.SetId("")
return nil
}
// Some other error, report it
return err
}
// If nothing was found, then return no state
if len(resp.Reservations) == 0 {
d.SetId("")
return nil
}
instance := &resp.Reservations[0].Instances[0]
// If the instance is terminated, then it is gone
if instance.State.Name == "terminated" {
d.SetId("")
return nil
}
d.Set("availability_zone", instance.AvailZone)
d.Set("key_name", instance.KeyName)
d.Set("public_dns", instance.DNSName)
d.Set("public_ip", instance.PublicIpAddress)
d.Set("private_dns", instance.PrivateDNSName)
d.Set("private_ip", instance.PrivateIpAddress)
d.Set("subnet_id", instance.SubnetId)
var deps []terraform.ResourceDependency
// Determine whether we're referring to security groups with
// IDs or names. We use a heuristic to figure this out. By default,
// we use IDs if we're in a VPC. However, if we previously had an
// all-name list of security groups, we use names. Or, if we had any
// IDs, we use IDs.
useID := instance.SubnetId != ""
if v := d.Get("security_groups"); v != nil {
match := false
for _, v := range v.(*schema.Set).List() {
if strings.HasPrefix(v.(string), "sg-") {
match = true
break
}
}
useID = match
}
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// Build up the security groups
sgs := make([]string, len(instance.SecurityGroups))
for i, sg := range instance.SecurityGroups {
if useID {
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sgs[i] = sg.Id
} else {
sgs[i] = sg.Name
}
deps = append(deps, terraform.ResourceDependency{ID: sg.Id})
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}
d.Set("security_groups", sgs)
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// If we're in a VPC, we depend on the subnet
if instance.SubnetId != "" {
deps = append(deps, terraform.ResourceDependency{ID: instance.SubnetId})
}
d.SetDependencies(deps)
return nil
}
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// InstanceStateRefreshFunc returns a resource.StateRefreshFunc that is used to watch
// an EC2 instance.
func InstanceStateRefreshFunc(conn *ec2.EC2, instanceID string) resource.StateRefreshFunc {
return func() (interface{}, string, error) {
resp, err := conn.Instances([]string{instanceID}, ec2.NewFilter())
if err != nil {
if ec2err, ok := err.(*ec2.Error); ok && ec2err.Code == "InvalidInstanceID.NotFound" {
// Set this to nil as if we didn't find anything.
resp = nil
} else {
log.Printf("Error on InstanceStateRefresh: %s", err)
return nil, "", err
}
}
if resp == nil || len(resp.Reservations) == 0 || len(resp.Reservations[0].Instances) == 0 {
// Sometimes AWS just has consistency issues and doesn't see
// our instance yet. Return an empty state.
return nil, "", nil
}
i := &resp.Reservations[0].Instances[0]
return i, i.State.Name, nil
}
}