# Limitations

**What frameworks/languages does mirrord support?**

mirrord works by [hooking libc](https://metalbear.com/blog/mirrord-internals-hooking-libc-functions-in-rust-and-fixing-bugs/), so it should work with any language/framework that uses libc (vast majority).

This includes: Rust, Node, Python, Java, Kotlin, Ruby, and others (most languages use libc).

mirrord also supports [Go](https://metalbear.com/blog/hooking-go-from-rust-hitchhikers-guide-to-the-go-laxy/), which doesn't use libc

**Does mirrord support clusters with a service mesh like Istio or Linkerd?**

Yes, mirrord works exactly the same way with and without a service mesh installed.

**Does mirrord support OpenShift?**

Yes, mirrord works with OpenShift. However, OpenShift usually ships with a default security policy that doesn't let mirrord create pods. To fix this, you would need to tweak your `scc` settings - more information [here](https://docs.openshift.com/container-platform/3.11/admin_guide/manage_scc.html). If you'd rather keep the default security policies, we recommend trying out [mirrord for Teams](https://metalbear.com/mirrord/docs/getting-started/installing-mirrord/operator).

**Does mirrord support binaries that are statically compiled? (Linux)**

No, mirrord needs to be able to leverage dynamic linking in order to work. This means static binaries are not supported.

To check a binary, you can use the `file <FILE_NAME>` command - dynamically linked binaries will look like this:

```bash
marvin@heart-of-gold:~$ file /usr/bin/ls
/usr/bin/ls: ELF 64-bit LSB pie executable, x86-64, version 1 (SYSV), dynamically linked, interpreter /lib64/ld-linux-x86-64.so.2, BuildID[sha1]=36b86f957a1be53733633d184c3a3354f3fc7b12, for GNU/Linux 3.2.0, stripped
```

And static binaries will look like this:

```bash
marvin@heart-of-gold:~/MetalBear$ file some_static_binary 
some_static_binary: ELF 64-bit LSB executable, x86-64, version 1 (GNU/Linux), statically linked, BuildID[sha1]=2e1eda62d5f755377435c009e856cd7b9836734e, for GNU/Linux 3.2.0, not stripped
```

Sometimes, Go is statically compiled by default, so it's important to check and compile dynamically if necessary. See [this section in Common Issues](https://metalbear.com/mirrord/docs/troubleshooting/common-issues#ive-run-my-program-with-mirrord-but-it-seems-to-have-no-effect) for more info.


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