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docs snapshot for crossplane version `v1.7`

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docs/v1.7/contributing/adding_external_secret_store_support.md
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--- ---
title: Adding External Secret Store Support to an Existing Provider title: Adding Secret Store Support
toc: true toc: true
weight: 1004 weight: 1004
indent: true indent: true
@ -20,6 +20,9 @@ feature enabled.
In this document, we will go through each step in details. You can check In this document, we will go through each step in details. You can check
[this PR as a complete example]. [this PR as a complete example].
> If your provider is a Terrajet based provider, then please check
> [this PR instead].
## Steps ## Steps
**1. Bump Crossplane Runtime and Crossplane Tools to latest and generate **1. Bump Crossplane Runtime and Crossplane Tools to latest and generate
@ -39,7 +42,7 @@ expect errors similar to below:
make: *** [generate] Error 2 make: *** [generate] Error 2
``` ```
First we need to consume a temporary runtime version together with the latest First, we need to consume a temporary runtime version together with the latest
Crossplane Tools: Crossplane Tools:
```shell ```shell
@ -76,9 +79,9 @@ Runtime:
See [this commit as an example on how to add the type]. It is expected to be See [this commit as an example on how to add the type]. It is expected to be
almost same for all providers except groupName which includes the name short almost same for all providers except groupName which includes the name short
name of the provider (e.g. `gcp.secrets.crossplane.io`) name of the provider (e.g. `gcp.crossplane.io`)
Generate CRD with: Generate the CRD with:
```shell ```shell
make generate make generate
@ -130,6 +133,7 @@ example.
[External Secret Stores]: https://github.com/crossplane/crossplane/blob/master/design/design-doc-external-secret-stores.md [External Secret Stores]: https://github.com/crossplane/crossplane/blob/master/design/design-doc-external-secret-stores.md
[this PR as a complete example]: https://github.com/crossplane/provider-gcp/pull/421 [this PR as a complete example]: https://github.com/crossplane/provider-gcp/pull/421
[this commit as an example on how to add the type]: https://github.com/crossplane/provider-gcp/pull/421/commits/65c630b008e174336ac6b9dfbb319f0909514039 [this PR instead]: https://github.com/crossplane-contrib/provider-jet-template/pull/23/commits
[this commit as an example on how to add the type]: https://github.com/crossplane/provider-aws/pull/1242/commits/d8a2df323fa2489d82bf1843d2fe338de033c61d
[this commit as an example for adding the feature flag]: https://github.com/crossplane/provider-gcp/pull/421/commits/b5898c62dc6668d9918496de8aa9bc365c371f82 [this commit as an example for adding the feature flag]: https://github.com/crossplane/provider-gcp/pull/421/commits/b5898c62dc6668d9918496de8aa9bc365c371f82
[this commit as an example for changes in Setup functions]: https://github.com/crossplane/provider-gcp/pull/421/commits/9700d0c4fdb7e1fba8805afa309c1b1c7aa167a6 [this commit as an example for changes in Setup functions]: https://github.com/crossplane/provider-gcp/pull/421/commits/9700d0c4fdb7e1fba8805afa309c1b1c7aa167a6

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docs/v1.7/guides/vault-as-secret-store.md Normal file
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---
title: Vault as an External Secret Store
toc: true
weight: 230
indent: true
---
# Using Vault as an External Secret Store
This guide walks through the steps required to configure Crossplane and
its Providers to use [Vault] as an [External Secret Store]. For the sake of
completeness, we will also include steps for Vault installation and setup,
however, you can skip those and use your existing Vault.
> External Secret Stores are an alpha feature. They are not yet recommended for
> production use, and are disabled by default.
Crossplane consumes and also produces sensitive information to operate which
could be categorized as follows:
1. **Provider credentials:** These are the credentials required for Providers
to authenticate against external APIs. For example, AWS Access/Secret keys, GCP
service account json, etc.
2. **Connection Details:** Once an infrastructure provisioned, we usually
need some connection data to consume it. Most of the time, this
information includes sensitive information like usernames, passwords or access
keys.
3. **Sensitive Inputs to Managed Resources:** There are some Managed resources
which expect input parameters that could be sensitive. Initial password of a
managed database is a good example of this category.
It is already possible to use Vault for the 1st category (i.e. Provider
Credentials) as described in [the previous guide]. 3rd use case is a relatively
rare and being tracked with [this issue].
In this guide we will focus on the 2nd category, which is storing Connection
Details for managed resources in Vault.
## Steps
> Some steps in this guide duplicates [the previous guide] on Vault injection.
> However, for convenience, we put them here as well with minor
> changes/improvements.
At a high level we will run the following steps:
- Install and Unseal Vault.
- Configure Vault with Kubernetes Auth.
- Install and Configure Crossplane by enabling the feature.
- Install and Configure Provider GCP by enabling the feature.
- Deploy a Composition and CompositeResourceDefinition.
- Create a Claim.
- Verify all secrets land in Vault as expected.
For simplicity, we will deploy Vault into the same cluster as Crossplane,
however, this is not a requirement as long as Vault has Kubernetes auth enabled
for the cluster where Crossplane is running.
### Prepare Vault
1. Install Vault Helm Chart
```shell
kubectl create ns vault-system
helm repo add hashicorp https://helm.releases.hashicorp.com --force-update
helm -n vault-system upgrade --install vault hashicorp/vault
```
2. [Unseal] Vault
```shell
kubectl -n vault-system exec vault-0 -- vault operator init -key-shares=1 -key-threshold=1 -format=json > cluster-keys.json
VAULT_UNSEAL_KEY=$(cat cluster-keys.json | jq -r ".unseal_keys_b64[]")
kubectl -n vault-system exec vault-0 -- vault operator unseal $VAULT_UNSEAL_KEY
```
3. Configure Vault with Kubernetes Auth.
In order for Vault to be able to authenticate requests based on Kubernetes
service accounts, the [Kubernetes auth method] must be enabled.
This requires logging in to Vault and configuring it with a service account
token, API server address, and certificate. Because we are running Vault in
Kubernetes, these values are already available via the container filesystem and
environment variables.
Get Vault Root Token:
```shell
cat cluster-keys.json | jq -r ".root_token"
```
Login as root and enable/configure Kubernetes Auth:
```shell
kubectl -n vault-system exec -it vault-0 -- /bin/sh
vault login # use root token from above
vault auth enable kubernetes
vault write auth/kubernetes/config \
token_reviewer_jwt="$(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
exit # exit vault container
```
4. Enable Vault Key Value Secret Engine
There are two different versions of [Vault KV Secrets Engine], `v1` and `v2`,
which you can find more details in the linked documentation page.
We will use `v2` in this guide as an example, however, both versions are
supported as an external secret store.
```shell
kubectl -n vault-system exec -it vault-0 -- vault secrets enable -path=secret kv-v2
```
5. Create a Vault Policy and Role for Crossplane
```shell
kubectl -n vault-system exec -i vault-0 -- vault policy write crossplane - <<EOF
path "secret/data/*" {
capabilities = ["create", "read", "update", "delete"]
}
path "secret/metadata/*" {
capabilities = ["create", "read", "update", "delete"]
}
EOF
kubectl -n vault-system exec -it vault-0 -- vault write auth/kubernetes/role/crossplane \
bound_service_account_names="*" \
bound_service_account_namespaces=crossplane-system \
policies=crossplane \
ttl=24h
```
### Install and Configure Crossplane
1. Install Crossplane by:
- Enabling `External Secret Stores` feature.
- Annotating for [Vault Agent Sidecar Injection]
```shell
kubectl create ns crossplane-system
helm repo add crossplane-stable https://charts.crossplane.io/stable --force-update
helm upgrade --install crossplane crossplane-stable/crossplane --namespace crossplane-system \
--set 'args={--enable-external-secret-stores}' \
--set-string customAnnotations."vault\.hashicorp\.com/agent-inject"=true \
--set-string customAnnotations."vault\.hashicorp\.com/agent-inject-token"=true \
--set-string customAnnotations."vault\.hashicorp\.com/role"=crossplane \
--set-string customAnnotations."vault\.hashicorp\.com/agent-run-as-user"=65532
```
2. Create a Secret `StoreConfig` for Crossplane to be used by
Composition types, i.e. `Composites` and `Claims`:
```shell
echo "apiVersion: secrets.crossplane.io/v1alpha1
kind: StoreConfig
metadata:
name: vault
spec:
type: Vault
defaultScope: crossplane-system
vault:
server: http://vault.vault-system:8200
mountPath: secret/
version: v2
auth:
method: Token
token:
source: Filesystem
fs:
path: /vault/secrets/token" | kubectl apply -f -
```
### Install and Configure Provider GCP
1. Similar to Crossplane, install Provider GCP by:
- Enabling `External Secret Stores` feature.
- Annotating for [Vault Agent Sidecar Injection]
```shell
echo "apiVersion: pkg.crossplane.io/v1alpha1
kind: ControllerConfig
metadata:
name: vault-config
spec:
args:
- --enable-external-secret-stores
metadata:
annotations:
vault.hashicorp.com/agent-inject: \"true\"
vault.hashicorp.com/agent-inject-token: \"true\"
vault.hashicorp.com/role: crossplane
vault.hashicorp.com/agent-run-as-user: \"2000\"
---
apiVersion: pkg.crossplane.io/v1
kind: Provider
metadata:
name: provider-gcp
spec:
package: crossplane/provider-gcp:v0.21.0
controllerConfigRef:
name: vault-config" | kubectl apply -f -
```
2. Create a Secret `StoreConfig` for Provider GCP to be used by GCP Managed
Resources:
```shell
echo "apiVersion: gcp.crossplane.io/v1alpha1
kind: StoreConfig
metadata:
name: vault
spec:
type: Vault
defaultScope: crossplane-system
vault:
server: http://vault.vault-system:8200
mountPath: secret/
version: v2
auth:
method: Token
token:
source: Filesystem
fs:
path: /vault/secrets/token" | kubectl apply -f -
```
### Deploy and Test
> Prerequisite: You should have a working **default** `ProviderConfig` for
> GCP available.
1. Create a `Composition` and a `CompositeResourceDefinition`:
```shell
echo "apiVersion: apiextensions.crossplane.io/v1
kind: CompositeResourceDefinition
metadata:
name: compositeessinstances.ess.example.org
annotations:
feature: ess
spec:
group: ess.example.org
names:
kind: CompositeESSInstance
plural: compositeessinstances
claimNames:
kind: ESSInstance
plural: essinstances
connectionSecretKeys:
- publicKey
- publicKeyType
versions:
- name: v1alpha1
served: true
referenceable: true
schema:
openAPIV3Schema:
type: object
properties:
spec:
type: object
properties:
parameters:
type: object
properties:
serviceAccount:
type: string
required:
- serviceAccount
required:
- parameters" | kubectl apply -f -
echo "apiVersion: apiextensions.crossplane.io/v1
kind: Composition
metadata:
name: essinstances.ess.example.org
labels:
feature: ess
spec:
publishConnectionDetailsWithStoreConfigRef:
name: vault
compositeTypeRef:
apiVersion: ess.example.org/v1alpha1
kind: CompositeESSInstance
resources:
- name: serviceaccount
base:
apiVersion: iam.gcp.crossplane.io/v1alpha1
kind: ServiceAccount
metadata:
name: ess-test-sa
spec:
forProvider:
displayName: a service account to test ess
- name: serviceaccountkey
base:
apiVersion: iam.gcp.crossplane.io/v1alpha1
kind: ServiceAccountKey
spec:
forProvider:
serviceAccountSelector:
matchControllerRef: true
publishConnectionDetailsTo:
name: ess-mr-conn
metadata:
labels:
environment: development
team: backend
configRef:
name: vault
connectionDetails:
- fromConnectionSecretKey: publicKey
- fromConnectionSecretKey: publicKeyType" | kubectl apply -f -
```
2. Create a `Claim`:
```shell
echo "apiVersion: ess.example.org/v1alpha1
kind: ESSInstance
metadata:
name: my-ess
namespace: default
spec:
parameters:
serviceAccount: ess-test-sa
compositionSelector:
matchLabels:
feature: ess
publishConnectionDetailsTo:
name: ess-claim-conn
metadata:
labels:
environment: development
team: backend
configRef:
name: vault" | kubectl apply -f -
```
3. Verify all resources SYNCED and READY:
```shell
kubectl get managed
# Example output:
# NAME READY SYNCED DISPLAYNAME EMAIL DISABLED
# serviceaccount.iam.gcp.crossplane.io/my-ess-zvmkz-vhklg True True a service account to test ess my-ess-zvmkz-vhklg@testingforbugbounty.iam.gserviceaccount.com
# NAME READY SYNCED KEY_ID CREATED_AT EXPIRES_AT
# serviceaccountkey.iam.gcp.crossplane.io/my-ess-zvmkz-bq8pz True True 5cda49b7c32393254b5abb121b4adc07e140502c 2022-03-23T10:54:50Z
kubectl -n default get claim
# Example output:
# NAME READY CONNECTION-SECRET AGE
# my-ess True 19s
kubectl get composite
# Example output:
# NAME READY COMPOSITION AGE
# my-ess-zvmkz True essinstances.ess.example.org 32s
```
### Verify the Connection Secrets landed to Vault
```shell
# Check connection secrets in the "default" scope (namespace).
kubectl -n vault-system exec -i vault-0 -- vault kv list /secret/default
# Example output:
# Keys
# ----
# ess-claim-conn
# Check connection secrets in the "crossplane-system" scope (namespace).
kubectl -n vault-system exec -i vault-0 -- vault kv list /secret/crossplane-system
# Example output:
# Keys
# ----
# d2408335-eb88-4146-927b-8025f405da86
# ess-mr-conn
# Check contents of claim connection secret
kubectl -n vault-system exec -i vault-0 -- vault kv get /secret/default/ess-claim-conn
# Example output:
# ======= Metadata =======
# Key Value
# --- -----
# created_time 2022-03-18T21:24:07.2085726Z
# custom_metadata map[environment:development secret.crossplane.io/owner-uid:881cd9a0-6cc6-418f-8e1d-b36062c1e108 team:backend]
# deletion_time n/a
# destroyed false
# version 1
#
# ======== Data ========
# Key Value
# --- -----
# publicKey -----BEGIN PUBLIC KEY-----
# MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAzsEYCokmYEsZJCc9QN/8
# Fm1M/kTPp7Gat/MXLTP3zFyCTBFVNLN79MbAKdinWi6ePXEb75vzB79IdZcWj8lo
# 8trnS64QjNB9Vs4Xk5UvDALwleFN/bZeperxivDPwVPvT9Aqy/U9kohoS/LHyE8w
# uWQb5AuMeVQ1gtCTnCqQZ4d2MSVhQXYVvAWax1spJ9LT7mHub5j95xDdYIcOV3VJ
# l9CIo4VrWIT8THFN2NnjTrGq9+0TzXY0bV674bjJkfBC6v6yXs5HTetG+Uekq/xf
# FCjrrDi1+2UR9Mu2WTuvl8qn50be+mbwdJO5wE32jewxdYrVVmj19+PkaEeAwGTc
# vwIDAQAB
# -----END PUBLIC KEY-----
# publicKeyType TYPE_RAW_PUBLIC_KEY
# Check contents of managed resource connection secret
kubectl -n vault-system exec -i vault-0 -- vault kv get /secret/crossplane-system/ess-mr-conn
# Example output:
# ======= Metadata =======
# Key Value
# --- -----
# created_time 2022-03-18T21:21:07.9298076Z
# custom_metadata map[environment:development secret.crossplane.io/owner-uid:4cd973f8-76fc-45d6-ad45-0b27b5e9252a team:backend]
# deletion_time n/a
# destroyed false
# version 2
#
# ========= Data =========
# Key Value
# --- -----
# privateKey {
# "type": "service_account",
# "project_id": "REDACTED",
# "private_key_id": "REDACTED",
# "private_key": "-----BEGIN PRIVATE KEY-----\nREDACTED\n-----END PRIVATE KEY-----\n",
# "client_email": "ess-test-sa@REDACTED.iam.gserviceaccount.com",
# "client_id": "REDACTED",
# "auth_uri": "https://accounts.google.com/o/oauth2/auth",
# "token_uri": "https://oauth2.googleapis.com/token",
# "auth_provider_x509_cert_url": "https://www.googleapis.com/oauth2/v1/certs",
# "client_x509_cert_url": "https://www.googleapis.com/robot/v1/metadata/x509/ess-test-sa%40REDACTED.iam.gserviceaccount.com"
# }
# privateKeyType TYPE_GOOGLE_CREDENTIALS_FILE
# publicKey -----BEGIN PUBLIC KEY-----
# MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAzsEYCokmYEsZJCc9QN/8
# Fm1M/kTPp7Gat/MXLTP3zFyCTBFVNLN79MbAKdinWi6ePXEb75vzB79IdZcWj8lo
# 8trnS64QjNB9Vs4Xk5UvDALwleFN/bZeperxivDPwVPvT9Aqy/U9kohoS/LHyE8w
# uWQb5AuMeVQ1gtCTnCqQZ4d2MSVhQXYVvAWax1spJ9LT7mHub5j95xDdYIcOV3VJ
# l9CIo4VrWIT8THFN2NnjTrGq9+0TzXY0bV674bjJkfBC6v6yXs5HTetG+Uekq/xf
# FCjrrDi1+2UR9Mu2WTuvl8qn50be+mbwdJO5wE32jewxdYrVVmj19+PkaEeAwGTc
# vwIDAQAB
# -----END PUBLIC KEY-----
# publicKeyType TYPE_RAW_PUBLIC_KEY
```
The commands above verifies using the cli, however, you can also connect to the
Vault UI and check secrets there.
```shell
kubectl -n vault-system port-forward vault-0 8200:8200
```
Now, you can open http://127.0.0.1:8200/ui in browser and login with the root token.
### Cleanup
Delete the claim which should clean up all the resources created.
```
kubectl -n default delete claim my-ess
```
<!-- named links -->
[Vault]: https://www.vaultproject.io/
[External Secret Store]: https://github.com/crossplane/crossplane/blob/master/design/design-doc-external-secret-stores.md
[the previous guide]: vault-injection.md
[this issue]: https://github.com/crossplane/crossplane/issues/2985
[Kubernetes Auth Method]: https://www.vaultproject.io/docs/auth/kubernetes
[Unseal]: https://www.vaultproject.io/docs/concepts/seal
[Vault KV Secrets Engine]: https://www.vaultproject.io/docs/secrets/kv
[Vault Agent Sidecar Injection]: https://www.vaultproject.io/docs/platform/k8s/injector