kubernetes-vault

Kubernetes manifests to setup Hashicorp vault server

Full Documentation: https://devopscube.com/vault-in-kubernetes/

#Sample API request to the vault using service account tokens to acquire a token with reading capabilities for path "demo-app"

curl --request POST --data '{"jwt": "<< service account token of the pod >>", "role": "webapp"}' http://192.168.49.2:30493/v1/auth/kubernetes/login

#Sample API request to the vault to fetch secrets at "demo-app"

curl -H "X-Vault-Token: <client_token>" -H "X-Vault-Namespace: vault" -X GET http://192.168.49.2:30493/v1/demo-app/data/user01?version=1

Vault Usage

Initialize the vault.

VAULT_UNSEAL_KEY=$(cat keys.json | jq -r ".unseal_keys_b64[]")
echo $VAULT_UNSEAL_KEY

VAULT_ROOT_KEY=$(cat keys.json | jq -r ".root_token")
echo $VAULT_ROOT_KEY

Unseal the vault

kubectl exec vault-0 -- vault operator unseal $VAULT_UNSEAL_KEY

Login into the vault

kubectl exec vault-0 -- vault login $VAULT_ROOT_KEY

Create secrets

vault secrets enable -version=2 -path="demo-app" kv

Create key-value pairs

vault kv get demo-app/user01 

###Create policies

path "demo-app/*" {
  capabilities = ["read"]
}
EOH

vault policy list

#Enable Kubernetes authentication methods

vault write auth/kubernetes/config token_reviewer_jwt="$(cat /var/run/secrets/kubernetes.io/serviceaccount/token)" kubernetes_host="https://$KUBERNETES_PORT_443_TCP_ADDR:443" kubernetes_ca_cert=@/var/run/secrets/kubernetes.io/serviceaccount/ca.crt

vault write auth/kubernetes/role/webapp \
        bound_service_account_names=vault \
        bound_service_account_namespaces=default \
        policies=demo-policy \
        ttl=72h
        ```