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helm-external-secrets
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                  <h1>Parameter Store</h1>
                
                <p><img alt="aws sm" src="../pictures/diagrams-provider-aws-ssm-parameter-store.png" /></p>
<h2 id="parameter-store">Parameter Store</h2>
<p>A <code>ParameterStore</code> points to AWS SSM Parameter Store in a certain account within a
defined region. You should define Roles that define fine-grained access to
individual secrets and pass them to ESO using <code>spec.provider.aws.role</code>. This
way users of the <code>SecretStore</code> can only access the secrets necessary.</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">secretstore-sample</span>
<span class="nt">spec</span><span class="p">:</span>
  <span class="nt">controller</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">dev</span>
  <span class="nt">provider</span><span class="p">:</span>
    <span class="nt">aws</span><span class="p">:</span>
      <span class="nt">service</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">ParameterStore</span>
      <span class="c1"># define a specific role to limit access</span>
      <span class="c1"># to certain secrets</span>
      <span class="nt">role</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">iam-role</span>
      <span class="nt">region</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">eu-central-1</span>
      <span class="nt">auth</span><span class="p">:</span>
        <span class="nt">secretRef</span><span class="p">:</span>
          <span class="nt">accessKeyIDSecretRef</span><span class="p">:</span>
            <span class="nt">name</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">awssm-secret</span>
            <span class="nt">key</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">access-key</span>
          <span class="nt">secretAccessKeySecretRef</span><span class="p">:</span>
            <span class="nt">name</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">awssm-secret</span>
            <span class="nt">key</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">secret-access-key</span>
</pre></div>

<div class="admonition warning">
<p class="admonition-title">API Pricing &amp; Throttling</p>
<p>The SSM Parameter Store API is charged by throughput and
is available in different tiers, <a href="https://aws.amazon.com/systems-manager/pricing/#Parameter_Store">see pricing</a>.
Please estimate your costs before using ESO. Cost depends on the RefreshInterval of your ExternalSecrets.</p>
</div>
<h3 id="iam-policy">IAM Policy</h3>
<p>Create a IAM Policy to pin down access to secrets matching <code>dev-*</code>, for futher information see <a href="https://docs.aws.amazon.com/systems-manager/latest/userguide/sysman-paramstore-access.html">AWS Documentation</a>:</p>
<div class="highlight"><pre><span></span><span class="p">{</span>
  <span class="nt">&quot;Version&quot;</span><span class="p">:</span> <span class="s2">&quot;2012-10-17&quot;</span><span class="p">,</span>
  <span class="nt">&quot;Statement&quot;</span><span class="p">:</span> <span class="p">[</span>
    <span class="p">{</span>
      <span class="nt">&quot;Effect&quot;</span><span class="p">:</span> <span class="s2">&quot;Deny&quot;</span><span class="p">,</span>
      <span class="nt">&quot;Action&quot;</span><span class="p">:</span> <span class="p">[</span>
        <span class="s2">&quot;ssm:GetParameter*&quot;</span>
      <span class="p">],</span>
      <span class="nt">&quot;Resource&quot;</span><span class="p">:</span> <span class="s2">&quot;arn:aws:ssm:us-east-2:123456789012:parameter/dev-*&quot;</span>
    <span class="p">}</span>
  <span class="p">]</span>
<span class="p">}</span>
</pre></div>

<h3 id="json-secret-values">JSON Secret Values</h3>
<p>You can store JSON objects in a parameter. You can access nested values or arrays using <a href="https://github.com/tidwall/gjson/blob/master/SYNTAX.md">gjson syntax</a>:</p>
<p>Consider the following JSON object that is stored in the Parameter Store key <code>my-json-secret</code>:
<div class="highlight"><pre><span></span><span class="p">{</span>
  <span class="nt">&quot;name&quot;</span><span class="p">:</span> <span class="p">{</span><span class="nt">&quot;first&quot;</span><span class="p">:</span> <span class="s2">&quot;Tom&quot;</span><span class="p">,</span> <span class="nt">&quot;last&quot;</span><span class="p">:</span> <span class="s2">&quot;Anderson&quot;</span><span class="p">},</span>
  <span class="nt">&quot;friends&quot;</span><span class="p">:</span> <span class="p">[</span>
    <span class="p">{</span><span class="nt">&quot;first&quot;</span><span class="p">:</span> <span class="s2">&quot;Dale&quot;</span><span class="p">,</span> <span class="nt">&quot;last&quot;</span><span class="p">:</span> <span class="s2">&quot;Murphy&quot;</span><span class="p">},</span>
    <span class="p">{</span><span class="nt">&quot;first&quot;</span><span class="p">:</span> <span class="s2">&quot;Roger&quot;</span><span class="p">,</span> <span class="nt">&quot;last&quot;</span><span class="p">:</span> <span class="s2">&quot;Craig&quot;</span><span class="p">},</span>
    <span class="p">{</span><span class="nt">&quot;first&quot;</span><span class="p">:</span> <span class="s2">&quot;Jane&quot;</span><span class="p">,</span> <span class="nt">&quot;last&quot;</span><span class="p">:</span> <span class="s2">&quot;Murphy&quot;</span><span class="p">}</span>
  <span class="p">]</span>
<span class="p">}</span>
</pre></div></p>
<p>This is an example on how you would look up nested keys in the above json object:
<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">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">example</span>
<span class="nt">spec</span><span class="p">:</span>
  <span class="c1"># [omitted for brevity]</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">firstname</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">my-json-secret</span>
      <span class="nt">property</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">name.first</span> <span class="c1"># Tom</span>
  <span class="p p-Indicator">-</span> <span class="nt">secretKey</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">first_friend</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">my-json-secret</span>
      <span class="nt">property</span><span class="p">:</span> <span class="l l-Scalar l-Scalar-Plain">friends.1.first</span> <span class="c1"># Roger</span>
</pre></div></p>
<h2 id="aws-authentication">AWS Authentication</h2>
<p>Access to AWS providers can be granted in various ways:</p>
<ul>
<li><a href="https://docs.aws.amazon.com/eks/latest/userguide/iam-roles-for-service-accounts.html">IRSA</a>: IAM roles for service accounts.</li>
<li>Per pod IAM authentication: <a href="https://github.com/uswitch/kiam">kiam</a> or <a href="https://github.com/jtblin/kube2iam">kube2iam</a>.</li>
<li>Directly provide AWS credentials to the External Secrets Operator pod by using environment variables.</li>
</ul>
<p>Additionally, before fetching a secret from a store, ESO is able to assume role (as a proxy so to speak). It is advisable to use multiple roles in a multi-tenant environment.</p>
                
                  
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