buun-stack/vault/justfile

set fallback := true

export VAULT_NAMESPACE := env("VAULT_NAMESPACE", "vault")
export VAULT_CHART_VERSION := env("VAULT_CHART_VERSION", "0.29.1")
export VAULT_HOST := env("VAULT_HOST", "")
export VAULT_ADDR := "https://" + VAULT_HOST
SECRET_PATH := "secret"

[private]
default:
    @just --list --unsorted --list-submodules

# Add Helm repository
add-helm-repo:
    helm repo add hashicorp https://helm.releases.hashicorp.com
    helm repo update

# Remove Helm repository
remove-helm-repo:
    helm repo remove hashicorp

# Create Keycloak namespace
create-namespace:
    @kubectl get namespace ${VAULT_NAMESPACE} &>/dev/null || \
        kubectl create namespace ${VAULT_NAMESPACE}

# Delete Keycloak namespace
delete-namespace:
    @kubectl delete namespace ${VAULT_NAMESPACE} --ignore-not-found

# Install Vault
install: check-env
    #!/bin/bash
    set -euo pipefail
    just create-namespace
    just add-helm-repo
    gomplate -f vault-values.gomplate.yaml -o vault-values.yaml
    helm upgrade --cleanup-on-fail --install vault hashicorp/vault \
        --version ${VAULT_CHART_VERSION} -n ${VAULT_NAMESPACE} --wait -f vault-values.yaml

    # Wait for the primary vault pod to complete init containers and be ready to accept commands
    kubectl wait pod --for=condition=PodReadyToStartContainers \
        -n ${VAULT_NAMESPACE} vault-0 --timeout=5m

    init_output=$(kubectl exec -n ${VAULT_NAMESPACE} vault-0 -- \
        vault operator init -key-shares=1 -key-threshold=1 -format=json || true)

    root_token=""
    if echo "${init_output}" | grep -q "Vault is already initialized"; then
        echo "Vault is already initialized"
        while [ -z "${root_token}" ]; do
            root_token=$(gum input --prompt="Vault root token: " --password --width=100)
        done
    else
        unseal_key=$(echo "${init_output}" | jq -r '.unseal_keys_b64[0]')
        root_token=$(echo "${init_output}" | jq -r '.root_token')
        kubectl exec -n ${VAULT_NAMESPACE} vault-0 -- \
            vault operator unseal "${unseal_key}"
        echo "Vault initialized and unsealed successfully"
        echo "Root Token: ${root_token}"
        echo "Unseal Key: ${unseal_key}"
        echo "Please save these credentials securely!"
    fi

    # Wait for all vault instances to pass readiness checks and be ready to serve requests
    kubectl wait pod --for=condition=ready -n ${VAULT_NAMESPACE} \
        -l app.kubernetes.io/name=vault --timeout=5m

    just configure-kubernetes-auth "${root_token}"
    just create-secrets-engine {{ SECRET_PATH }} "${root_token}"

# Uninstall Vault
uninstall delete-ns='false':
    #!/bin/bash
    set -euo pipefail
    helm uninstall vault -n ${VAULT_NAMESPACE} --ignore-not-found --wait
    just delete-namespace

# Create admin token
create-admin-token root_token='': check-env
    #!/bin/bash
    set -euo pipefail
    export VAULT_TOKEN="{{ root_token }}"
    while [ -z "${VAULT_TOKEN}" ]; do
        VAULT_TOKEN=$(gum input --prompt="Vault root token: " --password --width=100)
    done
    vault policy write admin - <<EOF
    path "sys/auth" {
        capabilities = ["read", "list", "sudo"]
    }
    path "sys/auth/*" {
        capabilities = ["create", "read", "update", "delete", "list", "sudo"]
    }
    path "secret/*" {
        capabilities = ["create", "read", "update", "delete", "list"]
    }
    path "auth/*" {
        capabilities = ["create", "read", "update", "delete", "list"]
    }
    path "sys/policy/*" {
        capabilities = ["create", "read", "update", "delete", "list"]
    }
    path "sys/policies/acl/*" {
        capabilities = ["create", "read", "update", "delete", "list"]
    }
    EOF
    vault token create -policy=admin

# Create secrets engine
create-secrets-engine path root_token='':
    #!/bin/bash
    set -euo pipefail
    export VAULT_TOKEN="{{ root_token }}"
    while [ -z "${VAULT_TOKEN}" ]; do
        VAULT_TOKEN=$(gum input --prompt="Vault root token: " --password --width=100)
    done
    # Use kubectl exec during initial setup to avoid DNS dependency
    kubectl exec -n ${VAULT_NAMESPACE} vault-0 -- sh <<EOF
        export VAULT_TOKEN='${VAULT_TOKEN}'
        vault secrets enable -path='{{ path }}' kv-v2
    EOF

# Configure Kubernetes authentication for Vault
configure-kubernetes-auth root_token='':
    #!/bin/bash
    set -euo pipefail
    export VAULT_TOKEN="{{ root_token }}"
    while [ -z "${VAULT_TOKEN}" ]; do
        VAULT_TOKEN=$(gum input --prompt="Vault root token: " --password --width=100)
    done

    gomplate -f ./serviceaccount.gomplate.yaml | kubectl apply -n "${VAULT_NAMESPACE}" -f -
    gomplate -f ./rolebinding.gomplate.yaml | kubectl apply -n "${VAULT_NAMESPACE}" -f -
    kubectl apply -n "${VAULT_NAMESPACE}" -f ./auth-token-secret.yaml

    SA_SECRET="vault-auth-token"
    SA_JWT=$(kubectl get secret -n ${VAULT_NAMESPACE} ${SA_SECRET} -o jsonpath='{.data.token}' | \
        base64 --decode)
    SA_CA=$(kubectl get secret -n ${VAULT_NAMESPACE} ${SA_SECRET} -o jsonpath='{.data.ca\.crt}' | \
        base64 --decode)

    # Use kubectl exec to run vault commands directly in the pod during initial setup
    kubectl exec -n ${VAULT_NAMESPACE} vault-0 -- sh <<EOF
        export VAULT_TOKEN='${VAULT_TOKEN}'
        vault auth list -format=json | jq -e '.["kubernetes/"]' >/dev/null 2>&1 || \
            vault auth enable kubernetes
        vault write auth/kubernetes/config \
            token_reviewer_jwt='${SA_JWT}' \
            kubernetes_host='https://kubernetes.default.svc' \
            kubernetes_ca_cert='${SA_CA}'
    EOF

# Get key value
get path field: check-env
    @vault kv get -mount=secret -field={{ field }} {{ path }}

# Put key value
put path *args: check-env
    @vault kv put -mount=secret {{ path }} {{ args }}

# Delete key value
delete path: check-env
    @vault kv delete -mount=secret {{ path }}

# Check if key exists
exist path: check-env
    @vault kv get -mount=secret {{ path }} &>/dev/null

# Check the environment
[private]
check-env:
    #!/bin/bash
    set -euo pipefail
    if [ -z "${VAULT_HOST}" ]; then
        while [ -z "${VAULT_HOST}" ]; do
            VAULT_HOST=$(
                gum input --prompt="Vault host: " --width=100 --placeholder="vault.example.com"
            )
        done
        just env::set VAULT_HOST "${VAULT_HOST}"
    fi