Infra Scripts

All infrastructure scripts/automation will be organized here.

Setup Cluster

1. Deploy networking, worker, controller VMs and setup application load balancer object to front data traffic.
2. Setup k8s on controller and worker VMs
3. Deploy application manifest on cluster

Prerequisites

• gcloud cli tool
• gcloud ssh keys
• terraform

Prepping GCP account

Run this command locally to provide access to API client library.

gcloud auth application-default login

Deploying

1. Edit setup.sh and modify the global variables on top
2. Execute script using bash setup.sh
   • script will provide name of the log file which you can track tail -f run-*.log

Destroying cluster

1. terraform destroy -var-file=deployment.tfvars -auto-approve

Postgres config

• access psql cli

  sudo -u postgres psql
  

• create pastav user

  CREATE USER pastav WITH PASSWORD '***'; ALTER USER pastav WITH SUPERUSER;
  

• change port and listen on all addresses sudo -u postgres vim /etc/postgresql/12/main/postgresql.conf

  listen_addresses = '*'
  port = 8086
  

• allow login for user and from all IPs sudo -u postgres vim /etc/postgresql/12/main/pg_hba.conf

  local   all             pastav                                  md5
  host    all             all             0.0.0.0/0               md5
  

Redis config

• add password sudo -u redis vim /etc/redis/redis.conf
  • add requirepass ***
  • change bind 127.0.0.1 ::1 to bind 0.0.0.0

Miscellaneous

(routing-engine)
(api-server)                                         (redis) (postgresql)
----------------- k8s --------------                 -------- DB --------
[WORKER]                 [CONTROLLER]                      [DB VM]
 
+++++++++++++++++++++++++++++++++++ FW ++++++++++++++++++++++++++++++++++
================================GCP======================================
 
 
             80      30000
user_req -> ALB -> [WORKER]
			6969                 8080                   8080
                     (api-server) -> $routing-engine-svc$ -> (routing-enging)

check open ports

sudo ss -tlnp

check services

sudo systemctl status postgresql
sudo systemctl status redis

kubectl get details

kubectl get pods
kubectl get svc
kubectl describe pod <pod-name>
kubectl logs <pod-name>

redeploy if docker image is updated

kubectl delete -f servers.yaml
kubectl apply -f servers.yaml