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https://github.com/psharpx/terraform-labs

A set of handy terraform sample projects
https://github.com/psharpx/terraform-labs

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A set of handy terraform sample projects

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# **terraform-labs**

A set of handy terraform sample projects



### *Terraform CLI basic commands*

````bash

terraform plan

terraform apply

terraform apply --auto-approve

terraform destroy

terraform destroy --auto-approve

````



### *Format and validate the configuration*

We recommend using consistent formatting in all of your configuration files. The terraform fmt command automatically updates configurations in the current directory for readability and consistency.

You can also make sure your configuration is syntactically valid and internally consistent by using the terraform validate command.

````bash

terraform fmt

terraform validate

````



### *Terraform CLI - Import resources*

````bash

terraform plan -generate-config-out=generated_resources.tf

````



### *Tool for testing autoscaling features in EC2 instances*

````bash

apt-get install -y stress

stress --help

stress --cpu 2 --timeout 300s

stress --cpu 2 --timeout 300s -v

````



## **AWS**

TODO



## **AZURE**

TODO



## **GCP**



### *Print GCloud cheat-sheet for help*

````bash

# display gcloud cheat sheet

gcloud cheat-sheet

````



### *GCloud command structure - Playing with services*

1. **GROUP** - which service group are you playing with ?

    - i.e config or compute or container or dataflow or functions or iam or ...

2. **SUBGROUP** - which subgroup of the service do you want to play with ?

    - i.e instances or images or instance-templates or machine-types or regions or zones

3. **ACTION** - what do you want to do ?

    - i.e create or delete or list or stop or start or describe



````bash

gcloud GROUP SUBGROUP ACTION ...

````



### *Initialize & Configure GCloud*

````bash

# Initialize the gcloud configuration

gcloud init

gcloud config list

# gcloud config list SECTION/PROPERTY

gcloud config list account

gcloud config list project

gcloud config list compute/region

# gcloud config set SECTION/PROPERTY

# gcloud config set compute/zone us-central1-a

# gcloud config set compute/region us-central1

gcloud config set compute/zone NAME

gcloud config set compute/region NAME

# gclouf config unset SECTION/PROPERTY

gcloud config unset project

gcloud config unset compute/region

gcloud config unset compute/zone



gcloud config list project

gcloud config list

````



### *Manage multiple configurations*

````bash

# Use one of the following options to manage multiple configurations in your environment

gcloud config configurations create/delete/activate/describe/list

gcloud config configurations activate my-default-configuration

gcloud config configurations describe my-second-configuration

gcloud config configurations list

gcloud config configurations create my-third-configuration

gcloud config configurations delete my-third-configuration

````



### *List compute images available in Google Cloud Platform*

````bash

gcloud compute images list --sort-by=PROJECT

gcloud compute images list --filter="name:ubuntu-pro-fips-1804-bionic-v20240411"

gcloud compute images list --filter="name=ubuntu-pro-fips-1804-bionic-v20240411"

gcloud compute images list --filter="PROJECT:(windows-cloud,ubuntu-os-cloud)"

gcloud compute images list --filter="name ~ debian.*"

gcloud compute images list --filter="name ~ debian.*" --uri

gcloud compute images list --filter="name ~ ubuntu.*"

gcloud compute images list --filter="family ~ ubuntu-pro.*"

gcloud compute images list --filter="family ~ fedora-cloud.*"

gcloud compute images list --filter="name ~ ubuntu.*-v202404.*"

gcloud compute images list --filter="name ~ ubuntu.*-v202403.*"

gcloud compute images list --filter="name ~ ubuntu.*-amd64.*"

gcloud compute images list --filter="name ~ ubuntu.* AND NOT name ~ .*arm64.*"

gcloud compute images list --filter="creationTimestamp > -P1Y"

gcloud compute images list --filter="creationTimestamp > -P1Y" --uri

gcloud compute images list --filter="name ~ ubuntu.* AND creationTimestamp > -P1Y"

gcloud compute images list --filter="name ~ ubuntu.* AND creationTimestamp > -P1Y" --uri

gcloud compute images list --filter="name ~ ubuntu.*" --format="value(name,creationTimestamp)"

gcloud compute images list --filter="name ~ ubuntu.*" --format="value(name,creationTimestamp,uri(selfLink))"

gcloud compute images list --filter="name ~ ubuntu.*" --format="value(name, creationTimestamp, uri(selflink))"

gcloud compute images list --filter="name ~ ubuntu.*" --sort-by=creationTimestamp --format="value(name,creationTimestamp)"

gcloud compute images list --filter="name ~ ubuntu.* AND NOT name ~ .*arm64.*" --sort-by=~creationTimestamp --format="value(name, creationTimestamp)"

gcloud compute images list --filter="name ~ ubuntu.* AND NOT name ~ .*arm64.*" --sort-by=creationTimestamp --format="value(name, creationTimestamp)"

gcloud compute images list --filter="name ~ ubuntu.*" --sort-by=creationTimestamp --format="value(name, creationTimestamp)"

gcloud compute images list --filter="name ~ ubuntu.*" --sort-by=~creationTimestamp --format="value(name, creationTimestamp)"



gcloud compute images describe NAME|URI

gcloud compute images describe NAME|URI

gcloud compute images describe https://www.googleapis.com/compute/v1/projects/fedora-cloud/global/images/fedora-cloud-base-gcp-34-1-2-x86-64

````

### Describe image response example

```

archiveSizeBytes: '718809600'

creationTimestamp: '2021-05-06T09:33:30.114-07:00'

description: Fedora, Fedora Cloud Base 34, v34.20210423.0, x86_64 published on 2021-04-27

diskSizeGb: '10'

family: fedora-cloud-34

guestOsFeatures:

- type: UEFI_COMPATIBLE

- type: VIRTIO_SCSI_MULTIQUEUE

id: '2751620519915267254'

kind: compute#image

labelFingerprint: 42WmSpB8rSM=

licenseCodes:

- '1002001'

- '2706998670158047507'

licenses:

- https://www.googleapis.com/compute/v1/projects/vm-options/global/licenses/enable-vmx

- https://www.googleapis.com/compute/v1/projects/fedora-cloud/global/licenses/fedora-34-cloud-base

name: fedora-cloud-base-gcp-34-1-2-x86-64

rawDisk:

  containerType: TAR

  source: ''

selfLink: https://www.googleapis.com/compute/v1/projects/fedora-cloud/global/images/fedora-cloud-base-gcp-34-1-2-x86-64

sourceType: RAW

status: READY

storageLocations:

- us

- eu

- asia

```



### *List machine types available in Google Cloud Platform*

````bash

gcloud compute machine-types list --sort-by=PROJECT

gcloud compute machine-types list --filter zone:us-central1-a

gcloud compute machine-types list --filter="zone:( us-central1-b europe-west1-d )"

gcloud compute machine-types list --filter="name ~ n1-standard.*"

gcloud compute machine-types list --filter="name ~ n1-standard.* AND zone:us-central1-a"

gcloud compute machine-types list --filter="guestCpus = 4"

gcloud compute machine-types list --filter="guestCpus = 2 AND zone ~ us-central1.*"

gcloud compute machine-types list --filter="zone~us-west.*"

gcloud compute machine-types list --filter="memoryMb >= 8192"

gcloud compute machine-types list --filter="guestCpus >= 2 AND guestCpus <= 4 AND memoryMb >= 8192"

gcloud compute machine-types list --filter="description ~ .*High-memory.*"



# gcloud compute machine-types describe NAME

gcloud compute machine-types describe n1-standard-1

````



### *Results with all possible fields/properties*

```

creationTimestamp: '1969-12-31T16:00:00.000-08:00'

description: 1 vCPU, 3.75 GB RAM

guestCpus: 1

id: '3001'

imageSpaceGb: 10

isSharedCpu: false

kind: compute#machineType

maximumPersistentDisks: 128

maximumPersistentDisksSizeGb: '263168'

memoryMb: 3840

name: n1-standard-1

selfLink: https://www.googleapis.com/compute/v1/projects/aforo255-387602/zones/us-central1-a/machineTypes/n1-standard-1

zone: us-central1-a

```



### *Playing with Compute Engine service*

#### *Manage Instances*

````bash

gcloud compute instances list

gcloud compute instances create

gcloud compute instances create my-first-instance-from-gcloud

gcloud compute instances create my-first-instance-from-gcloud \

    --machine-type=e2-standard-2 \

    --source-instance-template= \

    --custom-cpu=4 \

    --custom-memory=4096 \

    --custom-vm-type=n2 \

    --image=debian \

    --zone=us-central1-a \

    --tags= \

    --preemptible \

    --restart-on-failure \

    --maintenance-policy=MIGRATE \

    --metadata-from-file= \

    --



gcloud compute instances describe my-first-instance-from-gcloud

gcloud compute instances delete my-first-instance-from-gcloud

gclout compute instances stop my-first-instance-from-gcloud

gclout compute instances start my-first-instance-from-gcloud

gclout compute instances move my-first-instance-from-gcloud --zone us-central1-b --zone us-central1-c



gcloud compute zones list

gcloud compute zones list --uri

gcloud compute regions list

gcloud compute regions list --uri

gcloud compute zones list --filter=region:us-west2

gcloud compute zones list --sort-by=region

gcloud compute zones list --sort-by=~region

gcloud compute zones list --uri

gcloud compute regions describe us-west4



gcloud compute disk-types list

gcloud compute disks list

gcloud compute snapshots list

````



#### *Manage Instance Templates*

````bash

gcloud compute instance-templates list

gcloud compute instance-templates create instance-template-from-command-line

gcloud compute instance-templates delete instance-template-from-command-line

gcloud compute instance-templates describe my-instance-template-with-custom-image

````



#### *Configure default REGION/ZONE in Compute Instances*



**Options**

1. Centralized configuration:

````bash

gcloud compute project-info add-metadata \

    --metadata[google-compute-default-region=REGION|google-compute-default-zone=ZONE]

````

2. Local gcloud configuration

````bash

gcloud config set compute/region REGION

gcloud config set compute/zone ZONE

````

3. Command specific

````bash

--zone or

--region in the command

````

> **PRIORITY** Option 3 (if exists) overrides Option 2 (if exists) overrides Option 1



#### *Managed Instances Groups*

````bash

gcloud compute instance-groups managed list

gcloud compute instance-groups managed describe my-managed-instance-group

gcloud compute instance-groups managed delete my-managed-instance-group

gcloud compute instance-groups managed delete my-managed-instance-group --region=us-central1

gcloud compute instance-groups managed create my-mig --zone us-central1-a --template my-instance-template-with-custom-image --size 1

gcloud compute instance-groups managed set-autoscaling my-mig --max-num-replicas=2 --zone us-central1-a --cool-down-period=60s --min-num-replicas=1 --mode=on

gcloud compute instance-groups managed stop-autoscaling my-mig --zone us-central1-a

## Resize the Group

gcloud compute instance-groups managed resize my-mig --size=1 --zone=us-central1-a

## Recreate one or more instances

gcloud compute instance-groups managed recreate-instances my-mig --instances=my-mig-85fb --zone us-central1-a

## Update specific instances

gcloud compute instance-groups managed update-instances my-mig --instances=my-instance--3,my-instance-4 --minimal-action=none(default)/refresh/replace/restart \

--most-disruptive-allowed-action=none(default)/refresh/replace/restart

## Update instance templates

gcloud compute instance-groups managed set-instance-template my-mig --template=v2-template

## Rolling Actions

### Scenario: You want to manage your new release - v1 to v2 - without downtime

gcloud compute instance-groups managed rolling-action

## -> Restart (stop & start)

## --max-surge=max n° of instances updated at a time

gcloud compute instance-groups managed rolling-action restart my-mig \

--max-surge=5 or 10% #(max n° of instances updated at a time)

## -> Replace (delete & recreate)

## --max-surge=max n° of instances updated at a time

## --max-unavailable=max n° of instances that can be down for the update

## --replacement-method=substitute(default) creates instances with new names. recreate reuse names

gcloud compute instance-groups managed rolling-action replace my-mig \

--max-surge=5 or 10% \

--max-unavailable=5 or 10% \

--replacement-method=recreate/substitute

## -> Updates instance to a new template 

## Basic version= updates all instances slowly step by step

gcloud compute instace-groups managed rolling-action start-update my-mig \

--version=template=v1-template

gcloud compute instance-groups managed rolling-action start-update my-mig \

--version=template=v1-template \

--canary-version=template=v2-template,target-size=10%

## Canary version

````



### *Playing with App Engine service*

````bash

gcloud app deploy

gcloud app services list

gcloud app versions list

gcloud app instances list

gcloud app deploy --version=v2

gcloud app versions list

gcloud app browse

gcloud app browse --version 20210215t072907

gcloud app deploy --version=v3 --no-promote

gcloud app browse --version v3

gcloud app services set-traffic split=v3=.5,v2=.5

gcloud app services set-traffic splits=v3=.5,v2=.5

watch curl https://melodic-furnace-304906.uc.r.appspot.com/

gcloud app services set-traffic --splits=v3=.5,v2=.5 --split-by=random

 



gcloud app deploy

gcloud app browse --service=my-first-service

 

gcloud app services list

gcloud app regions list

 

gcloud app browse --service=my-first-service --version=20210215t075851

gcloud app browse --version=v2

gcloud app open-console --version=v2

gcloud app versions list --hide-no-traffic

````



### *Playing with Google Kubernetes Engine (GKE)*

````bash

gcloud config set project my-kubernetes-project-304910

gcloud container clusters get-credentials my-cluster --zone us-central1-c --project my-kubernetes-project-304910

kubectl create deployment hello-world-rest-api --image=in28min/hello-world-rest-api:0.0.1.RELEASE

kubectl get deployment

kubectl expose deployment hello-world-rest-api --type=LoadBalancer --port=8080

kubectl get services

kubectl get services --watch

curl 35.184.204.214:8080/hello-world

kubectl scale deployment hello-world-rest-api --replicas=3

gcloud container clusters resize my-cluster --node-pool default-pool --num-nodes=2 --zone=us-central1-c

kubectl autoscale deployment hello-world-rest-api --max=4 --cpu-percent=70

kubectl get hpa

kubectl create configmap hello-world-config --from-literal=RDS_DB_NAME=todos

kubectl get configmap

kubectl describe configmap hello-world-config

kubectl create secret generic hello-world-secrets-1 --from-literal=RDS_PASSWORD=dummytodos

kubectl get secret

kubectl describe secret hello-world-secrets-1

kubectl apply -f deployment.yaml

gcloud container node-pools list --zone=us-central1-c --cluster=my-cluster

kubectl get pods -o wide

 

kubectl set image deployment hello-world-rest-api hello-world-rest-api=in28min/hello-world-rest-api:0.0.2.RELEASE

kubectl get services

kubectl get replicasets

kubectl get pods

kubectl delete pod hello-world-rest-api-58dc9d7fcc-8pv7r

 

kubectl scale deployment hello-world-rest-api --replicas=1

kubectl get replicasets

gcloud projects list

 

kubectl delete service hello-world-rest-api

kubectl delete deployment hello-world-rest-api

gcloud container clusters delete my-cluster --zone us-central1-c

````