Hi I am new to Golang and Pulumi so sorry for the basic ques

Question

Hi I am new to Golang and Pulumi so sorry for the basic question I am following the below example to create the webserver This example works perfect to create a single VM at a time We are interested in creating multiple VM with single request Lets say developer select 3 or 4 Webserver vms with name of web1 2 3 respectively which should create vms accordingly We are using automation api with golang We are looking more dynamic way for creating vm rather than repeating the VM code for each vm we want to add Any advise will be helpful <https github com pulumi automation api examples tree main go vm manager azure>

billowy-army-68599 · Answer

< late energy 66663> you can just use a loop

late-energy-66663 · Answer

thumbsup Thanks

late-energy-66663 · Answer

Hi < billowy army 68599> Thanks for sharing that worked perfectly as expected Now I would like to clarify one more qustion After provisioning these Instances we would like to deploy Elasticsearch cluster or mongo db What would be best way to deploy any apps using pulumi any pointers will be appreciated

billowy-army-68599 · Answer

do you mean inside the ec2 instance if so then use the new pulumi command provider <https www pulumi com registry packages command api docs >

late-energy-66663 · Answer

yes Inside ec2 machines when they ready

late-energy-66663 · Answer

Thanks i will have look

late-energy-66663 · Answer

One more thing to clarify please

late-energy-66663 · Answer

Lets say If wanted to decommission one of the 5 web servers I added instead of destrying the whole stack what would be the best way to remove individual ec2 machine from the stack I am looking to do it using automation api

billowy-army-68599 · Answer

you d need to remove the instance from your code or do `pulumi destroy target lt urn gt `

late-energy-66663 · Answer

Thanks Just wondering how I can get the urn of the specific resource using code

billowy-army-68599 · Answer

`pulumi stack u`

late-energy-66663 · Answer

Thanks very much for sharing How we can access this feature using autmation api is there any example which I can look please

billowy-army-68599 · Answer

the stack API is here <https www pulumi com docs reference pkg nodejs pulumi pulumi automation Stack> we don t have an example

late-energy-66663 · Answer

Hi < billowy army 68599> I would really appreciate your advise So I have Implemented the Ec2 instances We are now looking to get the Public Ip address every Instance and other properties when they are fully provisioned Following the auzre example I mentioned above I am trying to implement similar function to the IP address In my version I am trying to achieve the similar function using ec2 GetInstance function which does not except the pulumi StringOutput and give me errros First I would to confirm if I am using the write approach to GetInstance properties for Ec2 machine More importantly when they are fully provisioned I am using this example as it uses ApplyT func args interface string error function which I think waits for the resource to be ready and gives use resource properties Can i achieve the following some other way ```func ws Webserver GetIPAddress ctx pulumi Context pulumi StringOutput The public IP address is not allocated until the VM is running so wait for that resource to create and then lookup the IP address again to report its public IP ready = pulumi All ws VM ID ws PublicIP Name ws PublicIP ResourceGroupName return ready ApplyT func args interface string error name = args 1 string resourceGroupName = args 2 string ip err = network GetPublicIP ctx amp network GetPublicIPArgs Name name ResourceGroupName resourceGroupName if err = nil return err return ip IpAddress nil pulumi StringOutput ``` My Version for EC2 ```func v virtualMachinesService GetIPAddress ctx pulumi Context pulumi StringOutput vm = new virtualmachines VirtualMachines The public IP address is not allocated until the VM is running so wait for that resource to create and then lookup the IP address again to report its public IP ready = pulumi All vm Instance ID vm Instance PublicIp return ready ApplyT func args interface string error pubip = args 1 string ip err = ec2 GetInstance ctx web server www vm Instance ID amp ec2 InstanceState PublicIp pubip if err = nil return err return ip p nil pulumi StringOutput ``` ``` type VirtualMachines struct pulumi ResourceState PublicIP ec2 Eip NetworkInterface ec2 NetworkInterface VPC ec2 Vpc Instance ec2 Instance Internet gateway ec2 InternetGateway Route ec2 Route GetAvailabilityZones ec2 AvailabilityZoneGroup Subnet ec2 Subnet SecurityGroup ec2 SecurityGroup ```

billowy-army-68599 · Answer

You shouldn t need to use `GetInstance` for AWS EC2 instances you should have an output with the IP address already which you can store in a slice

billowy-army-68599 · Answer

how did you provision your EC2 instances

late-energy-66663 · Answer

One way I tried

late-energy-66663 · Answer

``` ctx Export ipAddress srv PublicIp Export the resulting server s IP address and DNS name ctx Export publicIp vm Instance PublicIp ctx Export publicHostName vm Instance PublicDns ```

late-energy-66663 · Answer

Is that the output you think I can store in the slice

late-energy-66663 · Answer

Here is code of the VM ``` func NewVirtualMachine ctx pulumi Context name string args virtualmachines VirtualMachinesArgs opts pulumi ResourceOption virtualmachines VirtualMachines error vm = amp virtualmachines VirtualMachines err = ctx RegisterComponentResource virtual machine name vm opts if err = nil return nil err stackName = ctx Stack Create a valid webserver security group vm SecurityGroup err = ec2 NewSecurityGroup ctx web secgrp amp ec2 SecurityGroupArgs Ingress ec2 SecurityGroupIngressArray ec2 SecurityGroupIngressArgs Protocol pulumi String tcp Protocol args Protocol FromPort 80 ToPort 80 CidrBlocks pulumi StringArray pulumi String 0 0 0 0 0 if err = nil return nil err userData = pulumi Sprintf ` bin bash echo Hello from stack s gt index html nohup python m SimpleHTTPServer 80 amp ` stackName fmt Println args InstanceType fmt Println args NumberOfNodes for i = 1 i lt = args NumberOfNodes i++ vm Instance err = ec2 NewInstance ctx fmt Sprintf web server www d i amp ec2 InstanceArgs Tags pulumi StringMap Name pulumi String fmt Sprintf web server www d i InstanceType pulumi String t3 large InstanceType args InstanceType VpcSecurityGroupIds pulumi StringArray vm SecurityGroup ID Ami pulumi String ami 0a24e25f7f758ff73 UserData userData if err = nil panic error creating ec2 instance ctx Export ipAddress srv PublicIp Export the resulting server s IP address and DNS name ctx Export publicIp vm Instance PublicIp ctx Export publicHostName vm Instance PublicDns return nil nil ```

late-energy-66663 · Answer

Then I read this in ```func v virtualMachinesService GetDeployVMFunc vm virtualmachines CreateVmReq pulumi RunFunc return func ctx pulumi Context error fmt Println vm Protocol err = NewVirtualMachine ctx ec2 vms amp virtualmachines VirtualMachinesArgs Protocol pulumi String vm Protocol NumberOfNodes vm NumberOfNodes InstanceType pulumi String vm InstanceType if err = nil return err fmt Println vm NumberOfNodes ctx Export URN vm URN return nil ```

late-energy-66663 · Answer

then use the deploy function which deploys the machines ``` set out program for the deployment with the resulting network info w SetProgram VirtualMachinesService GetDeployVMFunc vm fmt Println deploying vm webserver wire up our update to stream progress to stdout stdoutStreamer = optup ProgressStreams os Stdout res err = s Up ctx stdoutStreamer if err = nil fmt Printf Failed to deploy vm stack v n err os Exit 1 time Sleep 60 time Second for key element = range res Outputs fmt Println key key = gt element Value fmt Println Update succeeded for key element = range res Outputs fmt Println Key key = gt Element element Value fmt Println Update succeeded fmt Printf deployed server running at public IP s n res Outputs ip Value string return nil ```

late-energy-66663 · Answer

So I do see the Ip address on the console but we want to make sure we get the Instance Information publicip PublicDNS EIP and other info Just after EC2 machine is fully ready as we would like to store that info in DB for further usage

late-energy-66663 · Answer

Thats why i am trying to implement GetIPaddress function as a starting point to safely get the required information and use the `return ready ApplyT func args interface pulumi StringOutput error ` which i think waits for the resource to be ready

late-energy-66663 · Answer

Below the Structs I am using ``` type VirtualMachines struct pulumi ResourceState PublicIP ec2 Eip NetworkInterface ec2 NetworkInterface VPC ec2 Vpc Instance ec2 Instance Internet gateway ec2 InternetGateway Route ec2 Route GetAvailabilityZones ec2 AvailabilityZoneGroup Subnet ec2 Subnet SecurityGroup ec2 SecurityGroup type VirtualMachinesArgs struct A required username for the VM login Username pulumi StringInput A required encrypted password for the VM password Password pulumi StringInput An optional boot script that the VM will use BootScript pulumi StringInput An optional VM size if unspecified Standard A0 micro will be used VMSize pulumi StringInput A required Resource Group in which to create the VM ResourceGroupName pulumi StringInput A required Subnet in which to deploy the VM SubnetID pulumi StringInput A required Subnet in which to deploy the VM CidrBlock pulumi StringInput This value for VPC to enable DNS EnableDnsHostnames pulumi Bool A map of tags to assign to the resource If configured with a provider `defaultTags` configuration block present tags with matching keys will overwrite those defined at the provider level Tags pulumi StringMapInput DestinationCidrBlock pulumi StringInput Specify true to indicate that instances launched into the subnet should be assigned a public IP address Default is `false` MapPublicIpOnLaunch pulumi Bool Protocol pulumi StringInput The instance type to use for the instance Updates to this field will trigger a stop start of the EC2 instance InstanceType pulumi StringInput Number of Nodes NumberOfNodes int Workdir auto LocalWorkspace ```

billowy-army-68599 · Answer

You can store the result in an array like this Then append it to a list

billowy-army-68599 · Answer

You don t need to use `GetInstance` unless there s something in that call that you need You already get the IPs so just push them into a slice

billowy-army-68599 · Answer

if you want to push them into a database you ll need to iterate over the slice and use an `ApplyT` to get the string value

late-energy-66663 · Answer

Thanks very much < billowy army 68599> I will have look pray

late-energy-66663 · Answer

Hi < billowy army 68599> Following the example you mention earlier Noticed that example built on v2 pulumi So not able to find the AppyIDArray method Just wondering that other method can I use to send out the pulumi IDArrayOutput in v4 aws pulumi ```func idOutputArrayToIDArrayOutput as pulumi IDOutput pulumi IDArrayOutput var outputs interface for a = range as outputs = append outputs a return pulumi All outputs ApplyIDArray func vs interface pulumi ID var results pulumi ID for v = range vs results = append results v pulumi ID return results ```

late-energy-66663 · Answer

I have rewrriten like this is that the right implementation of idOutputArrayToIDArrayOutput ```func idOutputArrayToIDArrayOutput as pulumi IDOutput pulumi IDArrayOutput var outputs interface for a = range as outputs = append outputs a return pulumi IDArrayOutput pulumi All outputs ApplyT func vs interface pulumi ID var results pulumi ID for v = range vs results = append results v pulumi ID return results pulumi AnyOutput ```

late-energy-66663 · Answer

Hi < billowy army 68599> I get below error when i implement above changed code When I comment the code its works fine Any suggestion how I can write the idOutputArrayToIDArrayOutput function please really appreciate you advise `pulumi pulumi Stack vpc vpc pulumi error an unhandled error occurred go inline source runtime error an unhandled error occurred interface conversion pulumi Output is pulumi IDArrayOutput not pulumi IDArrayArrayOutput` `pulumi pulumi Stack vpc vpc pulumi failed 1 error` `Diagnostics ` `pulumi pulumi Stack vpc vpc pulumi ` `error an unhandled error occurred go inline source runtime error an unhandled error occurred interface conversion pulumi Output is pulumi IDArrayOutput not pulumi IDArrayArrayOutput`

billowy-army-68599 · Answer

i cant help here I m afraid

late-energy-66663 · Answer

Sure Thanks