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


			
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  <h1>Advanced Templating</h1>

<p>With External Secrets Operator you can transform the data from the external secret provider before it is stored as <code>Kind=Secret</code>. You can do this with the <code>Spec.Target.Template</code>. Each data value is interpreted as a <a href="https://golang.org/pkg/text/template/">golang template</a>.</p>
<h2 id="examples">Examples</h2>
<p>You can use templates to inject your secrets into a configuration file that you mount into your pod:
<div class="highlight"><pre><span></span><code><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">ExternalSecret</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">template</span>
<span class="nt">spec</span><span class="p">:</span>
  <span class="nt">refreshInterval</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">1h</span>
  <span class="nt">secretStoreRef</span><span class="p">:</span>
    <span class="nt">name</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">secretstore-sample</span>
    <span class="nt">kind</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">SecretStore</span>
  <span class="nt">target</span><span class="p">:</span>
    <span class="nt">name</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">secret-to-be-created</span>
    <span class="c1"># this is how the Kind=Secret will look like</span>
    <span class="nt">template</span><span class="p">:</span>
      <span class="nt">type</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">kubernetes.io/tls</span>
      <span class="nt">data</span><span class="p">:</span>
        <span class="c1"># multiline string</span>
        <span class="nt">config</span><span class="p">:</span> <span class="p p-Indicator">|</span>
          <span class="no">datasources:</span>
          <span class="no">- name: Graphite</span>
            <span class="no">type: graphite</span>
            <span class="no">access: proxy</span>
            <span class="no">url: http://localhost:8080</span>
            <span class="no">password: &quot;{{ .password | toString }}&quot; # &lt;-- convert []byte to string</span>
            <span class="no">user: &quot;{{ .user | toString }}&quot;         # &lt;-- convert []byte to string</span>

  <span class="nt">data</span><span class="p">:</span>
  <span class="p p-Indicator">-</span> <span class="nt">secretKey</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">user</span>
    <span class="nt">remoteRef</span><span class="p">:</span>
      <span class="nt">key</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">/grafana/user</span>
  <span class="p p-Indicator">-</span> <span class="nt">secretKey</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">password</span>
    <span class="nt">remoteRef</span><span class="p">:</span>
      <span class="nt">key</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">/grafana/password</span>
</code></pre></div></p>
<p>You can also use pre-defined functions to extract data from your secrets. Here: extract key/cert from a pkcs12 archive and store it as PEM.
<div class="highlight"><pre><span></span><code><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">ExternalSecret</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">template</span>
<span class="nt">spec</span><span class="p">:</span>
  <span class="nt">refreshInterval</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">1h</span>
  <span class="nt">secretStoreRef</span><span class="p">:</span>
    <span class="nt">name</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">secretstore-sample</span>
    <span class="nt">kind</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">SecretStore</span>
  <span class="nt">target</span><span class="p">:</span>
    <span class="nt">name</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">secret-to-be-created</span>
    <span class="c1"># this is how the Kind=Secret will look like</span>
    <span class="nt">template</span><span class="p">:</span>
      <span class="nt">type</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">kubernetes.io/tls</span>
      <span class="nt">data</span><span class="p">:</span>
        <span class="nt">tls.crt</span><span class="p">:</span> <span class="s">&quot;{{</span><span class="nv"> </span><span class="s">.mysecret</span><span class="nv"> </span><span class="s">|</span><span class="nv"> </span><span class="s">pkcs12cert</span><span class="nv"> </span><span class="s">|</span><span class="nv"> </span><span class="s">pemCertificate</span><span class="nv"> </span><span class="s">}}&quot;</span>
        <span class="nt">tls.key</span><span class="p">:</span> <span class="s">&quot;{{</span><span class="nv"> </span><span class="s">.mysecret</span><span class="nv"> </span><span class="s">|</span><span class="nv"> </span><span class="s">pkcs12key</span><span class="nv"> </span><span class="s">|</span><span class="nv"> </span><span class="s">pemPrivateKey</span><span class="nv"> </span><span class="s">}}&quot;</span>

  <span class="nt">data</span><span class="p">:</span>
  <span class="c1"># this is a pkcs12 archive that contains</span>
  <span class="c1"># a cert and a private key</span>
  <span class="p p-Indicator">-</span> <span class="nt">secretKey</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">mysecret</span>
    <span class="nt">remoteRef</span><span class="p">:</span>
      <span class="nt">key</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">example</span>
</code></pre></div></p>
<h3 id="templatefrom">TemplateFrom</h3>
<p>You do not have to define your templates inline in an ExternalSecret but you can pull <code>ConfigMaps</code> or other Secrets that contain a template. Consider the following example:</p>
<div class="highlight"><pre><span></span><code><span class="c1"># define your template in a config map</span>
<span class="nt">apiVersion</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">v1</span>
<span class="nt">kind</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">ConfigMap</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">grafana-config-tpl</span>
<span class="nt">data</span><span class="p">:</span>
  <span class="nt">config.yaml</span><span class="p">:</span> <span class="p p-Indicator">|</span>
    <span class="no">datasources:</span>
      <span class="no">- name: Graphite</span>
        <span class="no">type: graphite</span>
        <span class="no">access: proxy</span>
        <span class="no">url: http://localhost:8080</span>
        <span class="no">password: &quot;{{ .password | toString }}&quot; # &lt;-- convert []byte to string</span>
        <span class="no">user: &quot;{{ .user | toString }}&quot;         # &lt;-- convert []byte to string</span>
<span class="nn">---</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">ExternalSecret</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">my-template-example</span>
<span class="nt">spec</span><span class="p">:</span>
  <span class="c1"># ...</span>
  <span class="nt">target</span><span class="p">:</span>
    <span class="nt">name</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">secret-to-be-created</span>
    <span class="nt">template</span><span class="p">:</span>
      <span class="nt">templateFrom</span><span class="p">:</span>
      <span class="p p-Indicator">-</span> <span class="nt">configMap</span><span class="p">:</span>
          <span class="c1"># name of the configmap to pull in</span>
          <span class="nt">name</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">grafana-config-tpl</span>
          <span class="c1"># here you define the keys that should be used as template</span>
          <span class="nt">items</span><span class="p">:</span>
          <span class="p p-Indicator">-</span> <span class="nt">key</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">config.yaml</span>
  <span class="nt">data</span><span class="p">:</span>
  <span class="p p-Indicator">-</span> <span class="nt">secretKey</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">user</span>
    <span class="nt">remoteRef</span><span class="p">:</span>
      <span class="nt">key</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">/grafana/user</span>
  <span class="p p-Indicator">-</span> <span class="nt">secretKey</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">password</span>
    <span class="nt">remoteRef</span><span class="p">:</span>
      <span class="nt">key</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">/grafana/password</span>
</code></pre></div>

<h2 id="helper-functions">Helper functions</h2>
<p>We provide a bunch of convenience functions that help you transform your secrets. A secret value is a <code>[]byte</code>.</p>
<table>
<thead>
<tr>
<th>Function</th>
<th>Description</th>
<th>Input</th>
<th>Output</th>
</tr>
</thead>
<tbody>
<tr>
<td>pkcs12key</td>
<td>extracts the private key from a pkcs12 archive</td>
<td><code>[]byte</code></td>
<td><code>[]byte</code></td>
</tr>
<tr>
<td>pkcs12keyPass</td>
<td>extracts the private key from a pkcs12 archive using the provided password</td>
<td>password <code>string</code>, data <code>[]byte</code></td>
<td><code>[]byte</code></td>
</tr>
<tr>
<td>pkcs12cert</td>
<td>extracts the certificate from a pkcs12 archive</td>
<td><code>[]byte</code></td>
<td><code>[]byte</code></td>
</tr>
<tr>
<td>pkcs12certPass</td>
<td>extracts the certificate from a pkcs12 archive using the provided password</td>
<td>password <code>string</code>, data <code>[]byte</code></td>
<td><code>[]byte</code></td>
</tr>
<tr>
<td>pemPrivateKey</td>
<td>PEM encodes the provided bytes as private key</td>
<td><code>[]byte</code></td>
<td><code>string</code></td>
</tr>
<tr>
<td>pemCertificate</td>
<td>PEM encodes the provided bytes as certificate</td>
<td><code>[]byte</code></td>
<td><code>string</code></td>
</tr>
<tr>
<td>jwkPublicKeyPem</td>
<td>takes an json-serialized JWK as <code>[]byte</code> and returns an PEM block of type <code>PUBLIC KEY</code> that contains the public key (<a href="https://golang.org/pkg/crypto/x509/#MarshalPKIXPublicKey">see here</a>) for details</td>
<td><code>[]byte</code></td>
<td><code>string</code></td>
</tr>
<tr>
<td>jwkPrivateKeyPem</td>
<td>takes an json-serialized JWK as <code>[]byte</code> and returns an PEM block of type <code>PRIVATE KEY</code> that contains the private key in PKCS #8 format (<a href="https://golang.org/pkg/crypto/x509/#MarshalPKCS8PrivateKey">see here</a>) for details</td>
<td><code>[]byte</code></td>
<td><code>string</code></td>
</tr>
<tr>
<td>base64decode</td>
<td>decodes the provided bytes as base64</td>
<td><code>[]byte</code></td>
<td><code>[]byte</code></td>
</tr>
<tr>
<td>base64encode</td>
<td>encodes the provided bytes as base64</td>
<td><code>[]byte</code></td>
<td><code>[]byte</code></td>
</tr>
<tr>
<td>fromJSON</td>
<td>parses the bytes as JSON so you can access individual properties</td>
<td><code>[]byte</code></td>
<td><code>interface{}</code></td>
</tr>
<tr>
<td>toJSON</td>
<td>encodes the provided object as json string</td>
<td><code>interface{}</code></td>
<td><code>string</code></td>
</tr>
<tr>
<td>toString</td>
<td>converts bytes to string</td>
<td><code>[]byte</code></td>
<td><code>string</code></td>
</tr>
<tr>
<td>toBytes</td>
<td>converts string to bytes</td>
<td><code>string</code></td>
<td><code>[]byte</code></td>
</tr>
<tr>
<td>upper</td>
<td>converts all characters to their upper case</td>
<td><code>string</code></td>
<td><code>string</code></td>
</tr>
<tr>
<td>lower</td>
<td>converts all character to their lower case</td>
<td><code>string</code></td>
<td><code>string</code></td>
</tr>
</tbody>
</table>

              
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