From 49f135bcd46b81e039f7715ac4052b854d59b48e Mon Sep 17 00:00:00 2001
From: Ethan <39577870+ethanndickson@users.noreply.github.com>
Date: Mon, 26 Jan 2026 21:52:05 +1100
Subject: [PATCH] fix(.devcontainer): make post_start.sh idempotent (#21678)

When running multiple instances of the coder/coder devcontainer, the
`postStartCommand` fails with exit code 1:

```
postStartCommand from devcontainer.json failed with exit code 1
Command failed: ./.devcontainer/scripts/post_start.sh
```

`service docker start` returns exit code 1 when Docker is already
running:

| Docker State | Exit Code |
|--------------|-----------|
| Not running | 0 |
| Already running | **1** |

## Fix

Check if Docker is already running before attempting to start it:

```bash
sudo service docker status >/dev/null 2>&1 || sudo service docker start
```

---

*This PR and description were generated by
[Mux](https://mux.coder.com).*
---
 .devcontainer/scripts/post_start.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.devcontainer/scripts/post_start.sh b/.devcontainer/scripts/post_start.sh
index c98674037d..1b87d801fd 100755
--- a/.devcontainer/scripts/post_start.sh
+++ b/.devcontainer/scripts/post_start.sh
@@ -1,4 +1,4 @@
 #!/bin/sh
 
 # Start Docker service if not already running.
-sudo service docker start
+sudo service docker status >/dev/null 2>&1 || sudo service docker start