Vault

Deploy Vault on OpenShift

Standalone Deployment

High Availability Deployment

Configure Kubernetes Auth with the Vault

• Standalone

  POD=$(oc get pods -lapp.kubernetes.io/name=vault --no-headers -o custom-columns=NAME:.metadata.name)
  oc rsh $POD
  

• HA

  oc rsh vault-0
  

Exec the following command.

export KEYS=QzlUGvdPbIcM83UxyjuGd2ws7flZdNimQVCNbUvI2aU=
export ROOT_TOKEN=s.UPBPfhDXYOtnv8mELhPA4br7
export VAULT_TOKEN=$ROOT_TOKEN

JWT=$(cat /var/run/secrets/kubernetes.io/serviceaccount/token)
KUBERNETES_HOST=https://${KUBERNETES_PORT_443_TCP_ADDR}:443

vault auth enable --tls-skip-verify kubernetes
vault write --tls-skip-verify auth/kubernetes/config token_reviewer_jwt=$JWT kubernetes_host=$KUBERNETES_HOST kubernetes_ca_cert=@/var/run/secrets/kubernetes.io/serviceaccount/ca.crt

Use Vault from your local

export VAULT_ADDR=https://$(oc get route vault --no-headers -o custom-columns=HOST:.spec.host)

Sample Policy

vault policy write --tls-skip-verify policy-example policy/policy-example.hcl

Authorisation

vault write --tls-skip-verify auth/kubernetes/role/example \
    bound_service_account_names=default bound_service_account_namespaces='app' \
    policies=policy-example \
    ttl=2h

Write Sample Data

vault secrets enable --tls-skip-verify -path=secret kv
vault write --tls-skip-verify  secret/example password=pwd

Test Vault Client

oc new-project app

JWT=$(oc sa get-token default -n app)
vault write --tls-skip-verify auth/kubernetes/login role=example jwt=${JWT}

Sample output:

Key                                       Value
---                                       -----
token                                     s.mCgDQH1SvtWT2lxdiqO2dvHj
token_accessor                            ZGqVZg8FMzA6mlBUufp894FK
token_duration                            2h
token_renewable                           true
token_policies                            ["default" "policy-example"]
identity_policies                         []
policies                                  ["default" "policy-example"]
token_meta_role                           example
token_meta_service_account_name           default
token_meta_service_account_namespace      app
token_meta_service_account_secret_name    default-token-v8fjh
token_meta_service_account_uid            4c69a1f8-fc93-4300-958c-04f349936431

Read the secret:

export VAULT_TOKEN=s.mCgDQH1SvtWT2lxdiqO2dvHj
vault read --tls-skip-verify secret/example

Vault Database secret

Deploy postgresql

oc new-app postgresql-persistent \
    --name=postgresql -lname=postgresql  \
    --param DATABASE_SERVICE_NAME=postgresql --param POSTGRESQL_DATABASE=sampledb \
    --param POSTGRESQL_USER=user --param POSTGRESQL_PASSWORD=redhat \
    --param VOLUME_CAPACITY=1Gi \
    --env POSTGRESQL_ADMIN_PASSWORD=postgres 

Enable datatabase secret in vault

vault secrets enable database

Install postgresql plugin

vault write --tls-skip-verify database/config/postgresql \
    plugin_name=postgresql-database-plugin \
    allowed_roles="pg-readwrite" \
    connection_url="postgresql://{{username}}:{{password}}@postgresql.app.svc:5432/sampledb?sslmode=disable" \
    username="postgres" \
    password="postgres" 

Role mapping

vault write --tls-skip-verify database/roles/pg-readwrite \
    db_name=postgresql \
    creation_statements="CREATE ROLE \"{{name}}\" WITH LOGIN PASSWORD '{{password}}' VALID UNTIL '{{expiration}}'; \
        GRANT SELECT ON ALL TABLES IN SCHEMA public TO \"{{name}}\";" \
    default_ttl="1h" \
    max_ttl="24h"

Sample Policy

The policy contains both secret/example path and database/creds/pg-readwrite

vault policy write --tls-skip-verify pg-readwrite policy/policy-database.hcl 

Authorisation

vault write --tls-skip-verify auth/kubernetes/role/example \
    bound_service_account_names=default bound_service_account_namespaces='app' \
    policies=pg-readwrite \
    ttl=2h 

Read credentials

vault read --tls-skip-verify database/creds/pg-readwrite

Sample output:

Key                Value
---                -----
lease_id           database/creds/pg-readwrite/2R94Xr0qfA6JNeWSx5O2I375
lease_duration     1h
lease_renewable    true
password           A1a-Sx82lF4AET6khzbj
username           v-root-pg-readw-57OZENOr1AYEhqt3n4xY-1541144444

Verify as well in Postgresql

sh-4.2$ psql
psql (9.6.10)
Type "help" for help.

postgres=# \du
                                                      List of roles
                    Role name                    |                         Attributes                         | Member of
-------------------------------------------------+------------------------------------------------------------+-----------
 postgres                                        | Superuser, Create role, Create DB, Replication, Bypass RLS | {}
 v-root-pg-readw-57OZENOr1AYEhqt3n4xY-1541144444 | Password valid until 2018-11-02 08:40:49+00                | {}

Test Vault Client

oc project app

JWT=$(oc sa get-token default -n app)
vault write --tls-skip-verify auth/kubernetes/login role=pg-readwrite jwt=${JWT}

Sample Output:

Key                                       Value
---                                       -----
token                                     418R4AnbyUKNWEPR8uTbUQyR
token_accessor                            WopxlNqCAQdcid0MlhYBtDFB
token_duration                            2h
token_renewable                           true
token_policies                            ["default" "pg-readwrite"]
identity_policies                         []
policies                                  ["default" "pg-readwrite"]
token_meta_service_account_name           default
token_meta_service_account_namespace      app
token_meta_service_account_secret_name    default-token-t265w
token_meta_service_account_uid            0aea2a8e-db8f-11e8-b25a-026c5425dd64
token_meta_role                           pg-readwrite

Read the secret:

export VAULT_TOKEN=418R4AnbyUKNWEPR8uTbUQyR
vault read  database/creds/pg-readwrite
vault read  secret/example

Vault Agent

Standalone Deployment

Manual Sidecar Container

Using Agent Vault as sidecar containers

Note

Right now all the examples only read the properties file at bootstrap.

Spring Example

Thorntail Example

EAP Example

Python Example

Vault Injector Mutating Webhook Configuration

1. Vault Injector Mutating Webhook Installation

   This is performed automatically together Helm chart installations for both Standalone and HA deployment.

2. Enable the vault webhook for the app project

   oc label namespace app vault.hashicorp.com/agent-webhook=enabled
   

Spring Example

Thorntail Example

EAP Example

Python Example

Wildfly MP Example

Quarkus Example

Quarkus Mutual TLS Example

Article

Secure Cloud Native Applications with HashiCorp Vault and Cert-Manager

References

• https://www.vaultproject.io/docs/agent/template/index.html
• https://github.com/hashicorp/vault-k8s
• https://www.vaultproject.io/docs/platform/k8s/injector/
• https://github.com/raffaelespazzoli/credscontroller
• https://blog.openshift.com/managing-secrets-openshift-vault-integration/
• https://blog.openshift.com/vault-integration-using-kubernetes-authentication-method
• https://github.com/jboss-developer/jboss-eap-quickstarts
• https://github.com/thorntail/thorntail-examples
• https://github.com/spring-projects/spring-boot
• https://dzone.com/articles/how-to-inject-property-file-properties-with-cdi