docker-development-youtube-series/hashicorp/vault/example-apps/basic-secret/readme.md

Basic Secret Injection

In order for us to start using secrets in vault, we need to setup a policy.

#Create a role for our app

kubectl -n vault-example exec -it vault-example-0 sh 

vault write auth/kubernetes/role/basic-secret-role \
   bound_service_account_names=basic-secret \
   bound_service_account_namespaces=vault-example \
   policies=basic-secret-policy \
   ttl=1h

The above maps our Kubernetes service account, used by our pod, to a policy. Now lets create the policy to map our service account to a bunch of secrets

kubectl -n vault-example exec -it vault-example-0 sh
cat <<EOF > /home/vault/app-policy.hcl
path "secret/basic-secret/*" {
  capabilities = ["read"]
}
EOF
vault policy write basic-secret-policy /home/vault/app-policy.hcl
exit

Now our service account for our pod can access all secrets under secret/basic-secret/* Lets create some secrets.

kubectl -n vault-example exec -it vault-example-0 sh 
vault secrets enable -path=secret/ kv
vault kv put secret/basic-secret/helloworld username=dbuser password=sUp3rS3cUr3P@ssw0rd
exit

Lets deploy our app and see if it works:

kubectl -n vault-example apply -f ./hashicorp/vault/example-apps/basic-secret/deployment.yaml
kubectl -n vault-example get pods