logic855
/
helm-external-secrets
mirror of https://github.com/external-secrets/external-secrets


			
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                  <h1>HashiCorp Vault</h1>
                
                <p><img alt="HCP Vault" src="../pictures/diagrams-provider-vault.png" /></p>
<h2 id="hashicorp-vault">Hashicorp Vault</h2>
<p>External Secrets Operator integrates with <a href="https://www.vaultproject.io/">HashiCorp Vault</a> for secret
management. Vault itself implements lots of different secret engines, as of now we only support the
<a href="https://www.vaultproject.io/docs/secrets/kv">KV Secrets Engine</a>.</p>
<h3 id="authentication">Authentication</h3>
<p>We support three different modes for authentication:
<a href="https://www.vaultproject.io/docs/auth/token">token-based</a>,
<a href="https://www.vaultproject.io/docs/auth/approle">appRole</a> and
<a href="https://www.vaultproject.io/docs/auth/kubernetes">kubernetes-native</a>, each one comes with it's own
trade-offs. Depending on the authentication method you need to adapt your environment.</p>
<h4 id="token-based-authentication">Token-based authentication</h4>
<p>A static token is stored in a <code>Kind=Secret</code> and is used to authenticate with vault.</p>
<div class="highlight"><pre><span></span><span class="nt">apiVersion</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">external-secrets.io/v1alpha1</span>
<span class="nt">kind</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">SecretStore</span>
<span class="nt">metadata</span><span class="p">:</span>
  <span class="nt">name</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">vault-backend</span>
  <span class="nt">namespace</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">example</span>
<span class="nt">spec</span><span class="p">:</span>
  <span class="nt">provider</span><span class="p">:</span>
    <span class="nt">vault</span><span class="p">:</span>
      <span class="nt">server</span><span class="p">:</span> <span class="s">&quot;https://vault.acme.org&quot;</span>
      <span class="nt">path</span><span class="p">:</span> <span class="s">&quot;secret&quot;</span>
      <span class="nt">version</span><span class="p">:</span> <span class="s">&quot;v2&quot;</span>
      <span class="nt">auth</span><span class="p">:</span>
        <span class="c1"># points to a secret that contains a vault token</span>
        <span class="c1"># https://www.vaultproject.io/docs/auth/token</span>
        <span class="nt">tokenSecretRef</span><span class="p">:</span>
          <span class="nt">name</span><span class="p">:</span> <span class="s">&quot;my-secret&quot;</span>
          <span class="nt">namespace</span><span class="p">:</span> <span class="s">&quot;secret-admin&quot;</span>
          <span class="nt">key</span><span class="p">:</span> <span class="s">&quot;vault-token&quot;</span>
</pre></div>

<h4 id="approle-authentication-example">AppRole authentication example</h4>
<p><a href="https://www.vaultproject.io/docs/auth/approle">AppRole authentication</a> reads the secret id from a
<code>Kind=Secret</code> and uses the specified <code>roleId</code> to aquire a temporary token to fetch secrets.</p>
<div class="highlight"><pre><span></span><span class="nt">apiVersion</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">external-secrets.io/v1alpha1</span>
<span class="nt">kind</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">SecretStore</span>
<span class="nt">metadata</span><span class="p">:</span>
  <span class="nt">name</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">vault-backend</span>
  <span class="nt">namespace</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">example</span>
<span class="nt">spec</span><span class="p">:</span>
  <span class="nt">provider</span><span class="p">:</span>
    <span class="nt">vault</span><span class="p">:</span>
      <span class="nt">server</span><span class="p">:</span> <span class="s">&quot;https://vault.acme.org&quot;</span>
      <span class="nt">path</span><span class="p">:</span> <span class="s">&quot;secret&quot;</span>
      <span class="nt">version</span><span class="p">:</span> <span class="s">&quot;v2&quot;</span>
      <span class="nt">auth</span><span class="p">:</span>
        <span class="c1"># VaultAppRole authenticates with Vault using the</span>
        <span class="c1"># App Role auth mechanism</span>
        <span class="c1"># https://www.vaultproject.io/docs/auth/approle</span>
        <span class="nt">appRole</span><span class="p">:</span>
          <span class="c1"># Path where the App Role authentication backend is mounted</span>
          <span class="nt">path</span><span class="p">:</span> <span class="s">&quot;approle&quot;</span>
          <span class="c1"># RoleID configured in the App Role authentication backend</span>
          <span class="nt">roleId</span><span class="p">:</span> <span class="s">&quot;db02de05-fa39-4855-059b-67221c5c2f63&quot;</span>
          <span class="nt">secretRef</span><span class="p">:</span>
            <span class="nt">name</span><span class="p">:</span> <span class="s">&quot;my-secret&quot;</span>
            <span class="nt">namespace</span><span class="p">:</span> <span class="s">&quot;secret-admin&quot;</span>
            <span class="nt">key</span><span class="p">:</span> <span class="s">&quot;vault-token&quot;</span>
</pre></div>

<h4 id="kubernetes-authentication">Kubernetes authentication</h4>
<p><a href="https://www.vaultproject.io/docs/auth/kubernetes">Kubernetes-native authentication</a> has three
options of optaining credentials for vault:</p>
<ol>
<li>by using a service account jwt referenced in <code>serviceAccountRef</code></li>
<li>by using the jwt from a <code>Kind=Secret</code> referenced by the <code>secretRef</code></li>
<li>by using transient credentials from the mounted service account token within the
    external-secrets operator</li>
</ol>
<div class="highlight"><pre><span></span><span class="nt">apiVersion</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">external-secrets.io/v1alpha1</span>
<span class="nt">kind</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">SecretStore</span>
<span class="nt">metadata</span><span class="p">:</span>
  <span class="nt">name</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">vault-backend</span>
  <span class="nt">namespace</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">example</span>
<span class="nt">spec</span><span class="p">:</span>
  <span class="nt">provider</span><span class="p">:</span>
    <span class="nt">vault</span><span class="p">:</span>
      <span class="nt">server</span><span class="p">:</span> <span class="s">&quot;https://vault.acme.org&quot;</span>
      <span class="nt">path</span><span class="p">:</span> <span class="s">&quot;secret&quot;</span>
      <span class="nt">version</span><span class="p">:</span> <span class="s">&quot;v2&quot;</span>
      <span class="nt">auth</span><span class="p">:</span>
        <span class="c1"># Authenticate against Vault using a Kubernetes ServiceAccount</span>
        <span class="c1"># token stored in a Secret.</span>
        <span class="c1"># https://www.vaultproject.io/docs/auth/kubernetes</span>
        <span class="nt">kubernetes</span><span class="p">:</span>
          <span class="c1"># Path where the Kubernetes authentication backend is mounted in Vault</span>
          <span class="nt">mountPath</span><span class="p">:</span> <span class="s">&quot;kubernetes&quot;</span>
          <span class="c1"># A required field containing the Vault Role to assume.</span>
          <span class="nt">role</span><span class="p">:</span> <span class="s">&quot;demo&quot;</span>
          <span class="c1"># Optional service account field containing the name</span>
          <span class="c1"># of a kubernetes ServiceAccount</span>
          <span class="nt">serviceAccountRef</span><span class="p">:</span>
            <span class="nt">name</span><span class="p">:</span> <span class="s">&quot;my-sa&quot;</span>
            <span class="nt">namespace</span><span class="p">:</span> <span class="s">&quot;secret-admin&quot;</span>
          <span class="c1"># Optional secret field containing a Kubernetes ServiceAccount JWT</span>
          <span class="c1">#  used for authenticating with Vault</span>
          <span class="nt">secretRef</span><span class="p">:</span>
            <span class="nt">name</span><span class="p">:</span> <span class="s">&quot;my-secret&quot;</span>
            <span class="nt">namespace</span><span class="p">:</span> <span class="s">&quot;secret-admin&quot;</span>
            <span class="nt">key</span><span class="p">:</span> <span class="s">&quot;vault&quot;</span>
</pre></div>

<h4 id="ldap-authentication">LDAP authentication</h4>
<p><a href="https://www.vaultproject.io/docs/auth/ldap">LDAP authentication</a> uses
username/password pair to get an access token. Username is stored directly in
a <code>Kind=SecretStore</code> or <code>Kind=ClusterSecretStore</code> resource, password is stored
in a <code>Kind=Secret</code> referenced by the <code>secretRef</code>.</p>
<div class="highlight"><pre><span></span><span class="nt">apiVersion</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">external-secrets.io/v1alpha1</span>
<span class="nt">kind</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">SecretStore</span>
<span class="nt">metadata</span><span class="p">:</span>
  <span class="nt">name</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">vault-backend</span>
  <span class="nt">namespace</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">example</span>
<span class="nt">spec</span><span class="p">:</span>
  <span class="nt">provider</span><span class="p">:</span>
    <span class="nt">vault</span><span class="p">:</span>
      <span class="nt">server</span><span class="p">:</span> <span class="s">&quot;https://vault.acme.org&quot;</span>
      <span class="nt">path</span><span class="p">:</span> <span class="s">&quot;secret&quot;</span>
      <span class="nt">version</span><span class="p">:</span> <span class="s">&quot;v2&quot;</span>
      <span class="nt">auth</span><span class="p">:</span>
        <span class="c1"># VaultLdap authenticates with Vault using the LDAP auth mechanism</span>
        <span class="c1"># https://www.vaultproject.io/docs/auth/ldap</span>
        <span class="nt">ldap</span><span class="p">:</span>
          <span class="c1"># LDAP username</span>
          <span class="nt">username</span><span class="p">:</span> <span class="s">&quot;username&quot;</span>
          <span class="nt">secretRef</span><span class="p">:</span>
            <span class="nt">name</span><span class="p">:</span> <span class="s">&quot;my-secret&quot;</span>
            <span class="nt">namespace</span><span class="p">:</span> <span class="s">&quot;secret-admin&quot;</span>
            <span class="nt">key</span><span class="p">:</span> <span class="s">&quot;ldap-password&quot;</span>
</pre></div>

<h4 id="jwtoidc-authentication">JWT/OIDC authentication</h4>
<p><a href="https://www.vaultproject.io/docs/auth/jwt">JWT/OIDC</a> uses a
<a href="https://jwt.io/">JWT</a> token stored in a <code>Kind=Secret</code> and referenced by the
<code>secretRef</code>. Optionally a <code>role</code> field can be defined in a <code>Kind=SecretStore</code>
or <code>Kind=ClusterSecretStore</code> resource.</p>
<div class="highlight"><pre><span></span><span class="nt">apiVersion</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">external-secrets.io/v1alpha1</span>
<span class="nt">kind</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">SecretStore</span>
<span class="nt">metadata</span><span class="p">:</span>
  <span class="nt">name</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">vault-backend</span>
  <span class="nt">namespace</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">example</span>
<span class="nt">spec</span><span class="p">:</span>
  <span class="nt">provider</span><span class="p">:</span>
    <span class="nt">vault</span><span class="p">:</span>
      <span class="nt">server</span><span class="p">:</span> <span class="s">&quot;https://vault.acme.org&quot;</span>
      <span class="nt">path</span><span class="p">:</span> <span class="s">&quot;secret&quot;</span>
      <span class="nt">version</span><span class="p">:</span> <span class="s">&quot;v2&quot;</span>
      <span class="nt">auth</span><span class="p">:</span>
        <span class="c1"># VaultJwt authenticates with Vault using the JWT/OIDC auth mechanism</span>
        <span class="c1"># https://www.vaultproject.io/docs/auth/jwt</span>
        <span class="nt">jwt</span><span class="p">:</span>
          <span class="c1"># JWT role configured in a Vault server, optional.</span>
          <span class="nt">role</span><span class="p">:</span> <span class="s">&quot;vault-jwt-role&quot;</span>
          <span class="nt">secretRef</span><span class="p">:</span>
            <span class="nt">name</span><span class="p">:</span> <span class="s">&quot;my-secret&quot;</span>
            <span class="nt">namespace</span><span class="p">:</span> <span class="s">&quot;secret-admin&quot;</span>
            <span class="nt">key</span><span class="p">:</span> <span class="s">&quot;jwt-token&quot;</span>
</pre></div>
                
                  
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