Workload identity federation isn’t limited to authenticating workloads between cloud providers. There are many other scenarios where it can be useful to use workload identity federation instead of service account keys. Not all platforms or services support workload identity federation, but it’s not too difficult to change that.
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Whenever we want to call a Google or Google Cloud API, we need an access token. But there’s more than one way to obtain an access token, and depending on which way we use, the resulting access token might behave a little differently. What kinds of access tokens are there, and how do they differ?
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With the latest version of Just-in-Time access, we can now demand that users seek approval from a peer before they can activate certain roles.
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When an on-premises application needs to access Google Cloud, it’s tempting to just let it use a service account key. But if the application runs in an Active Directory environment, there’s a better alternative – we can let it use its domain credentials and “exchange” them against Google credentials. That doesn’t even require custom code anymore.
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With Just-in-Time Access, we can implement just-in-time privileged access management on Google Cloud by allowing users to temporarily elevate their access to certain projects. But a key limitation of the initial release of JIT Access was that it didn’t support inherited role bindings. Version 1.1 removes this limitation and features a new UI.
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When developing applications that use the Google Cloud API, being able to trace and inspect HTTP requests with a tool like Fiddler can be a great debugging aid. But getting Fiddler to work with the Java client libraries can be a bit tricky.
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The first thing we often do after creating a new Windows VM on Google Cloud is join the VM to Active Directory. With the latest IAP Desktop release, that got a little easier.
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When we run License Tracker for the first time, the tool analyzes the last 90 days of audit logs to determine how many VMs and physical servers we’ve been using. Going back 90 days in history is useful, but can we go back further?
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When we bring our own Windows licenses to Google Cloud, we must keep track of the number of physical servers that we’re using those licenses on. By using sole-tenant nodes, we can control which nodes our VMs run on, but nodes aren’t the same as physical servers.
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To deploy software or infrastructure automatically, many deployment pipelines need access to Google Cloud, so we let the pipelines use a service account. The more we rely on deployment pipelines and their service accounts, the more extensive and privileged their access to Google Cloud can become. And that creates new risks.
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The principle of least privilege states that we should grant users just enough access to carry out everyday activities, but no more. But what about the occasional case where a user does need privileged access, maybe to handle an incident or perform a rare configuration change? This is where just-in-time access can help.
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When we allow users to use SSH to connect to Linux VMs on Google Cloud, we need to keep track of their public keys, and which VMs they have access to. The latest version of IAP Desktop makes that a little easier.
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IAP Desktop uses a UI that’s similar to Visual Studio – we can dock tool windows, let them auto-hide when we don’t need them, or let them float as separate windows. But that flexibility didn’t apply to RDP windows… until now.
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Previously, we explored two ways of authenticating to Google Cloud using Kerberos and NTLM credentials. Both ways involved authenticating to AD FS using Integrated Windows Authentication, and then using workload identity federation. But there’s a third way that we haven’t cover yet – and it involves using the SAML HTTP-POST binding.
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When an application needs to access Google Cloud APIs, it needs credentials. On Google Cloud, we can attach a service account to the underlying compute resource to let the application obtain credentials. On AWS and Azure, we can achieve something to the same effect by using workload identity federation. But what about on-premises?
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Workload identity federation supports OpenID Connect, so it should be compatible with AD FS. But until recently, workload identity federation didn’t work with AD FS-issued access tokens – only ID tokens worked properly. What was the issue there?
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By default, IAP Desktop uses the rsa-ssh public key signature algorithm when authenticating to a Linux VM. That can be a problem in certain situations, which is why the latest version now adds support for ECDSA.
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Workload identity federation lets us impersonate a Google Cloud service account by using credentials from an external identity provider. That’s a useful and powerful feature, but there are some things to watch out for.
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Extending a platform or service to support workload identity federation
