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aws_instance.go
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aws_instance.go
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// Copyright 2018 Bull S.A.S. Atos Technologies - Bull, Rue Jean Jaures, B.P.68, 78340, Les Clayes-sous-Bois, France.
//
// 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 aws
import (
"context"
"fmt"
"net"
"path"
"strconv"
"strings"
"github.com/hashicorp/consul/api"
"github.com/pkg/errors"
"github.com/ystia/yorc/v3/config"
"github.com/ystia/yorc/v3/deployments"
"github.com/ystia/yorc/v3/helper/consulutil"
"github.com/ystia/yorc/v3/log"
"github.com/ystia/yorc/v3/prov/terraform/commons"
)
func (g *awsGenerator) generateAWSInstance(ctx context.Context, kv *api.KV, cfg config.Configuration, deploymentID, nodeName, instanceName string, infrastructure *commons.Infrastructure, outputs map[string]string, env *[]string) error {
nodeType, err := deployments.GetNodeType(kv, deploymentID, nodeName)
if err != nil {
return err
}
if nodeType != "yorc.nodes.aws.Compute" {
return errors.Errorf("Unsupported node type for %q: %s", nodeName, nodeType)
}
instance := ComputeInstance{}
instancesPrefix := path.Join(consulutil.DeploymentKVPrefix, deploymentID, "topology", "instances")
instancesKey := path.Join(instancesPrefix, nodeName)
instance.Tags.Name = cfg.ResourcesPrefix + nodeName + "-" + instanceName
// image_id is mandatory
image, err := deployments.GetNodePropertyValue(kv, deploymentID, nodeName, "image_id")
if err != nil {
return err
}
if image == nil || image.RawString() == "" {
return errors.Errorf("Missing mandatory parameter 'image_id' node type for %s", nodeName)
}
instance.ImageID = image.RawString()
// instance_type is mandatory
instanceType, err := deployments.GetNodePropertyValue(kv, deploymentID, nodeName, "instance_type")
if err != nil {
return err
}
if instanceType == nil || instanceType.RawString() == "" {
return errors.Errorf("Missing mandatory parameter 'instance_type' node type for %s", nodeName)
}
instance.InstanceType = instanceType.RawString()
// key_name is mandatory
keyName, err := deployments.GetNodePropertyValue(kv, deploymentID, nodeName, "key_name")
if err != nil {
return err
}
if keyName == nil || keyName.RawString() == "" {
return errors.Errorf("Missing mandatory parameter 'key_name' node type for %s", nodeName)
}
instance.KeyName = keyName.RawString()
// security_groups needs to contain a least one occurrence
secGroups, err := deployments.GetNodePropertyValue(kv, deploymentID, nodeName, "security_groups")
if err != nil {
return err
}
if secGroups == nil || secGroups.RawString() == "" {
return errors.Errorf("Missing mandatory parameter 'security_groups' node type for %s", nodeName)
}
for _, secGroup := range strings.Split(strings.NewReplacer("\"", "", "'", "").Replace(secGroups.RawString()), ",") {
secGroup = strings.TrimSpace(secGroup)
instance.SecurityGroups = append(instance.SecurityGroups, secGroup)
}
// Get connection info (user, private key)
user, privateKey, err := commons.GetConnInfoFromEndpointCredentials(kv, deploymentID, nodeName)
if err != nil {
return err
}
// Check optional provided Elastic IPs
eips, err := deployments.GetNodePropertyValue(kv, deploymentID, nodeName, "elastic_ips")
if err != nil {
return err
}
if eips != nil && eips.RawString() != "" {
for _, eip := range strings.Split(strings.NewReplacer("\"", "", "'", "").Replace(eips.RawString()), ",") {
eip = strings.TrimSpace(eip)
if net.ParseIP(eip) == nil {
return errors.Errorf("Malformed provided Elastic IP: %s", eip)
}
instance.ElasticIps = append(instance.ElasticIps, eip)
}
}
// Check if the root block device must be deleted on termination
deleteVolumeOnTermination := true // Default is deleting root block device on compute termination
s, err := deployments.GetNodePropertyValue(kv, deploymentID, nodeName, "delete_volume_on_termination")
if err != nil {
return err
}
if s != nil && s.RawString() != "" {
deleteVolumeOnTermination, err = strconv.ParseBool(s.RawString())
if err != nil {
return err
}
}
instance.RootBlockDevice = BlockDevice{DeleteOnTermination: deleteVolumeOnTermination}
// Optional property to select availability zone of the compute instance
availabilityZone, err := deployments.GetNodePropertyValue(kv, deploymentID, nodeName, "availability_zone")
if err != nil {
return err
}
if availabilityZone != nil {
instance.AvailabilityZone = availabilityZone.RawString()
}
// Optional property to add the compute to a logical grouping of instances
placementGroup, err := deployments.GetNodePropertyValue(kv, deploymentID, nodeName, "placement_group")
if err != nil {
return err
}
if placementGroup != nil {
instance.PlacementGroup = placementGroup.RawString()
}
// Add the AWS instance
commons.AddResource(infrastructure, "aws_instance", instance.Tags.Name, &instance)
// Provide private_address attribute output
privateIPKey := nodeName + "-" + instanceName + "-privateIP"
commons.AddOutput(infrastructure, privateIPKey, &commons.Output{Value: fmt.Sprintf("${aws_instance.%s.private_ip}", instance.Tags.Name)})
outputs[path.Join(instancesKey, instanceName, "/attributes/private_address")] = privateIPKey
// Provide specific DNS attribute attribute
publicDNSKey := nodeName + "-" + instanceName + "-publicDNS"
commons.AddOutput(infrastructure, publicDNSKey, &commons.Output{Value: fmt.Sprintf("${aws_instance.%s.public_dns}", instance.Tags.Name)})
outputs[path.Join(instancesKey, instanceName, "/attributes/public_dns")] = publicDNSKey
// If any Elastic IP is provided without any network requirement, EIP is anyway associated to the compute instance
// Check existing network requirement otherwise
var isElasticIP = len(instance.ElasticIps) > 0
if !isElasticIP {
isElasticIP, _, err = deployments.HasAnyRequirementFromNodeType(kv, deploymentID, nodeName, "network", "yorc.nodes.aws.PublicNetwork")
if err != nil {
return err
}
}
// Add the EIP Association
// The scalability is handled with a list of EIPs in the limit of EIPs provided
var eipAssociationName string
if isElasticIP {
if len(instance.ElasticIps) > 0 {
// Find the associated EIP in the list in function of the association index
ind := getEIPAssociationIndex(infrastructure, cfg.ResourcesPrefix+nodeName)
if ind < len(instance.ElasticIps) {
eipAssociationName = associateEIP(infrastructure, &instance, instance.ElasticIps[ind])
} else {
// Not enough provided EIPs, rest of EIP is generated
eipAssociationName = associateEIP(infrastructure, &instance, "")
}
} else {
// No provided EIP
eipAssociationName = associateEIP(infrastructure, &instance, "")
}
}
// Define the public IP according to the EIP association if one exists
var accessIP string
if eipAssociationName != "" {
accessIP = fmt.Sprintf("${aws_eip_association.%s.public_ip}", eipAssociationName)
} else {
accessIP = fmt.Sprintf("${aws_instance.%s.public_ip}", instance.Tags.Name)
}
// public_address/ ip_address output attributes
accessIPKey := nodeName + "-" + instanceName + "-publicIP"
commons.AddOutput(infrastructure, accessIPKey, &commons.Output{Value: accessIP})
outputs[path.Join(instancesKey, instanceName, "/capabilities/endpoint/attributes/ip_address")] = accessIPKey
outputs[path.Join(instancesKey, instanceName, "/attributes/ip_address")] = accessIPKey
outputs[path.Join(instancesKey, instanceName, "/attributes/public_address")] = accessIPKey
outputs[path.Join(instancesKey, instanceName, "/attributes/public_ip_address")] = accessIPKey
// Add Connection check
if err = commons.AddConnectionCheckResource(infrastructure, user, privateKey, accessIP, instance.Tags.Name, env); err != nil {
return err
}
return nil
}
func associateEIP(infrastructure *commons.Infrastructure, instance *ComputeInstance, providedEIP string) string {
// Add the association EIP/Instance
eipAssociation := ElasticIPAssociation{InstanceID: fmt.Sprintf("${aws_instance.%s.id}", instance.Tags.Name)}
log.Printf("Adding ElasticIP association for instance name:%s", instance.Tags.Name)
if providedEIP != "" {
// Use existing EIP
log.Printf("The following Elastic IP has been provided:%s", providedEIP)
eipAssociation.PublicIP = providedEIP
} else {
// Add the EIP
log.Printf("Adding ElasticIP for instance name:%s", instance.Tags.Name)
elasticIPName := "EIP-" + instance.Tags.Name
elasticIP := ElasticIP{}
commons.AddResource(infrastructure, "aws_eip", elasticIPName, &elasticIP)
eipAssociation.AllocationID = fmt.Sprintf("${aws_eip.%s.id}", elasticIPName)
}
eipAssociationName := "EIPAssoc-" + instance.Tags.Name
commons.AddResource(infrastructure, "aws_eip_association", eipAssociationName, &eipAssociation)
return eipAssociationName
}
func getEIPAssociationIndex(infrastructure *commons.Infrastructure, nodeNamePrefix string) int {
var ind int
if infrastructure.Resource["aws_eip_association"] != nil {
instances := infrastructure.Resource["aws_eip_association"].(map[string]interface{})
for key := range instances {
if strings.HasPrefix(key, "EIPAssoc-"+nodeNamePrefix) {
ind++
}
}
}
return ind
}