Information
GCloud Compute
GCloud Compute Guide is still a work in progress; these are active notes from my current R&D.
shell gcloud compute --help
- This will display all of the commands that will help you utilize the
compute engine
.
- This will display all of the commands that will help you utilize the
The are split into two major concepts, with
GROUP
andCOMMAND
.- According to Google, the compute command helps create, configure and manipulate the virtual machines within your pre-set project.
- The
SYNOPSIS
isgcloud compute GROUP | COMMAND [GCLOUD_WIDE_FLAG ...]
GCloud Compute Load Balancer
- Command to run 3 instances of
nginx
with an ingress load balancer.Shell command for VM that is running nginx inside of a
debian
operating system.gcloud compute instances create www-server-1 \ --zone=us-west1-b \ --tags=network-lb-tag \ --machine-type=e2-medium \ --image-family=debian-11 \ --image-project=debian-cloud \ --metadata=startup-script=start_nginx.sh
start_nginx.sh ->
#!/bin/bash apt-get update apt-get install nginx -y
For switching from Nginx to Apache2, replace the
nginx
withapache2
.To check the status on
ubuntu
, run thesudo systemctl status nginx
ORsudo systemctl status apache2
.
Example of a Load Balance Template:
The shell below is an example of an instance template that creates the load balance backend template.
gcloud compute instance-templates create lb-backend-template \ --region=us-west1 \ --network=default \ --subnet=default \ --tags=allow-health-check \ --machine-type=e2-medium \ --image-family=debian-11 \ --image-project=debian-cloud \ --metadata=startup-script=start_nginx_script.sh
Key concept is : Managed instance groups MIGs
- Mage instance groups or MIGs enable you to operate applications on multiple identical / clone virtual machines, thus allowing your orchestration to become scalable and highly available. This is done by utilizing the components within the automated MIG services, which includes: autoscaling, autohealing, regional (multiple zone) deployment, and automatic updating.
Manage Instance Group for the load balancer:
gcloud compute instance-groups managed create lb-backend-group \ --template=lb-backend-template --size=2 --zone=us-west1-b
Health Check:
gcloud compute firewall-rules create fw-allow-health-check \ --network=default \ --action=allow \ --direction=ingress \ --source-ranges=130.211.0.0/22,35.191.0.0/16 \ --target-tags=allow-health-check \ --rules=tcp:80
Backend-Services for gcloud compute
gcloud compute backend-services create web-backend-service \ --protocol=HTTP \ --port-name=http \ --health-checks=http-basic-check \ --global
Add Instance Group as the Backend to the Backend Service:
gcloud compute backend-services add-backend web-backend-service \ --instance-group=lb-backend-group \ --instance-group-zone=us-west1-b \ --global
Create a URL Map for routing the requests to the default backend services.
gcloud compute url-maps create web-map-http \ --default-service web-backend-service
Extra information regarding the URL Map: *** Note: URL map is a Google Cloud configuration resource used to route requests to backend services or backend buckets. For example, with an external HTTP(S) load balancer, you can use a single URL map to route requests to different destinations based on the rules configured in the URL map: Requests for Video go to one backend service. Requests for Audio go to a different backend service. Requests for Images go to a Cloud Storage backend bucket. Requests for any other host and path combination go to a default backend service.
Create a target HTTP proxy to route requests:
gcloud compute target-http-proxies create http-lb-proxy \ --url-map web-map-http
Global forwarding rule to route incoming requests to the proxy:
gcloud compute forwarding-rules create http-content-rule \ --address=lb-ipv4-1\ --global \ --target-http-proxy=http-lb-proxy \ --ports=80
Google Rules
Google Forwarding Rules
Note: A forwarding rule and its corresponding IP address represent the frontend configuration of a Google Cloud load balancer. Learn more about the general understanding of forwarding rules from the Forwarding rule overview Guide.
Guides
Media
Notes
Log
Journal
2023-04-16
Updated GCloud with tabs.