102 lines
3.7 KiB
Plaintext
102 lines
3.7 KiB
Plaintext
---
|
|
layout: docs
|
|
page_title: Storing the Snapshot Agent Config in Vault
|
|
description: >-
|
|
Configuring the Consul Helm chart to use a snapshot agent config stored in Vault.
|
|
---
|
|
|
|
# Storing the Snapshot Agent Config in Vault
|
|
|
|
This topic describes how to configure the Consul Helm chart to use a snapshot agent config stored in Vault.
|
|
## Overview
|
|
To use an ACL replication token stored in Vault, follow the steps outlined in the [Data Integration](/docs/k8s/installation/vault/data-integration) section.
|
|
|
|
Complete the following steps once:
|
|
1. Store the secret in Vault.
|
|
1. Create a Vault policy that authorizes the desired level of access to the secret.
|
|
|
|
Repeat the following steps for each datacenter in the cluster:
|
|
1. Create Vault Kubernetes auth roles that link the policy to each Consul on Kubernetes service account that requires access.
|
|
1. Update the Consul on Kubernetes helm chart.
|
|
|
|
## Prerequisites
|
|
Prior to setting up the data integration between Vault and Consul on Kubernetes, you will need to have:
|
|
1. Read and completed the steps in the [Systems Integration](/docs/k8s/installation/vault/systems-integration) section of [Vault as a Secrets Backend](/docs/k8s/installation/vault).
|
|
2. Read the [Data Integration Overview](/docs/k8s/installation/vault/data-integration) section of [Vault as a Secrets Backend](/docs/k8s/installation/vault).
|
|
|
|
## Store the Secret in Vault
|
|
|
|
First, store the snapshot agent config in Vault:
|
|
|
|
```shell-session
|
|
$ vault kv put secret/consul/snapshot-agent-config key="<snapshot agent JSON config>"
|
|
```
|
|
|
|
## Create Vault policy
|
|
|
|
Next, you will need to create a policy that allows read access to this secret.
|
|
|
|
The path to the secret referenced in the `path` resource is the same values that you will configure in the `client.snapshotAgent.configSecret.secretName` Helm configuration (refer to [Update Consul on Kubernetes Helm chart](#update-consul-on-kubernetes-helm-chart)).
|
|
|
|
<CodeBlockConfig filename="snapshot-agent-config-policy.hcl">
|
|
|
|
```HCL
|
|
path "secret/data/consul/snapshot-agent-config" {
|
|
capabilities = ["read"]
|
|
}
|
|
```
|
|
|
|
</CodeBlockConfig>
|
|
|
|
Apply the Vault policy by issuing the `vault policy write` CLI command:
|
|
|
|
```shell-session
|
|
$ vault policy write snapshot-agent-config-policy snapshot-agent-config-policy.hcl
|
|
```
|
|
|
|
## Create Vault Authorization Roles for Consul
|
|
|
|
Next, you will create a Kubernetes auth role for the Consul snapshot agent:
|
|
|
|
```shell-session
|
|
$ vault write auth/kubernetes/role/consul-server \
|
|
bound_service_account_names=<Consul snapshot agent service account> \
|
|
bound_service_account_namespaces=<Consul installation namespace> \
|
|
policies=snapshot-agent-config-policy \
|
|
ttl=1h
|
|
```
|
|
|
|
To find out the service account name of the Consul snapshot agent,
|
|
you can run the following `helm template` command with your Consul on Kubernetes values file:
|
|
|
|
```shell-session
|
|
$ helm template --release-name ${RELEASE_NAME} -s templates/client-snapshot-agent-serviceaccount.yaml hashicorp/consul
|
|
```
|
|
|
|
## Update Consul on Kubernetes Helm chart
|
|
|
|
Now that you have configured Vault, you can configure the Consul Helm chart to
|
|
use the snapshot agent configuration in Vault:
|
|
|
|
<CodeBlockConfig filename="values.yaml">
|
|
|
|
```yaml
|
|
global:
|
|
secretsBackend:
|
|
vault:
|
|
enabled: true
|
|
consulSnapshotAgentRole: snapshot-agent
|
|
client:
|
|
snapshotAgent:
|
|
configSecret:
|
|
secretName: secret/data/consul/snapshot-agent-config
|
|
secretKey: key
|
|
```
|
|
|
|
</CodeBlockConfig>
|
|
|
|
Note that `client.snapshotAgent.configSecret.secretName` is the path of the secret in Vault.
|
|
This should be the same path as the one you included in your Vault policy.
|
|
`client.snapshotAgent.configSecret.secretKey` is the key inside the secret data. This should be the same
|
|
as the key you passed when creating the snapshot agent config secret in Vault.
|