movePrivateIp.go

package main

import (
	
        "context"
	"errors"
	"log"

        "github.com/oracle/oci-go-sdk/common/auth"
	"github.com/oracle/oci-go-sdk/core"


	"dp/helpers"
)

func main() {

	log.Println("[ START ]")

	//
	// Defining common stuff
	//
	log.Println("         Initializing ...")
        provider, err := auth.InstancePrincipalConfigurationProvider()
        helpers.FatalIfError(err)

        virtualNetworkClient, err := core.NewVirtualNetworkClientWithConfigurationProvider(provider)
        helpers.FatalIfError(err)

        computeInstanceClient, err := core.NewComputeClientWithConfigurationProvider(provider)
        helpers.FatalIfError(err)

	ctx := context.Background()
	
	helpers.ParseEnvironmentVariables()
	ipAddress := helpers.PrivateIpAddress()
	if (*ipAddress == "") {
		helpers.FatalIfError(errors.New("Env variable OCI_PRIVATE_IP_ADDRESS not set."))
	}

	log.Println("         Done")

	//
	// Getting my OCID by calling http://169.254.169.254/opc/v1/instance/
	//
	compartmentId,computeId,err := helpers.GetComputeInstanceInfo()
	helpers.FatalIfError(err)
	log.Println("         ...My Instance ID :",*computeId)
	log.Println("         My Compartment ID :",*compartmentId)

	//
	// Getting all my attached VNICs and their SubnetIDs
	//
	attachedVNICs := helpers.ListAttachedVNICs(computeInstanceClient,ctx,compartmentId,computeId)
	log.Println("         My Attached VNICs :[")
	for _, vnic := range attachedVNICs {
		log.Printf("                             %v,",*vnic.VnicId)

	}
	log.Println("                            ]")

	//
	// Getting the ID of the IP that needs to be moved and the VNIC Id of the interface on the same subnet as the IP
	//
	privateIpID,vnicId,err := helpers.GetPrivateIPID(virtualNetworkClient,ctx,attachedVNICs,ipAddress)
	helpers.FatalIfError(err)
	log.Println("         IP:",*ipAddress," with Id : ",*privateIpID)
	log.Println("            will be moved on Vnic: ",*vnicId)

	//
	// Moving the IP on the first Vnic on the same subnet as the IP address to be assigned
	//
	helpers.ReassignPrivateIP(virtualNetworkClient, ctx, vnicId,privateIpID)
	log.Println("         IP:",*ipAddress," has been successfully reassigned")

	// Done
	log.Println("[  END  ]")
}