Fix(registry/Excellencedev/templates/hetzner-linux): Correctly select coder agent arch on Hetzner CAX ARM Instances

[Alfredooe]

Description

hetzner-linux template allows CAX (ARM) instances but hardcodes coder agent to amd64 causing the wrong coder-agent to be pulled on CAX instance causing provisioning failure.

Adding architecture to server_types response and mapping this to correct agent arch, with defaults back to amd64 for if this fails.

No Fix, CAX Instance

Jan 25 16:03:48 coder-test-nofix-dev systemd[1]: Starting coder-agent.service - Coder Agent...
Jan 25 16:03:53 coder-test-nofix-dev systemd[1]: Started coder-agent.service - Coder Agent.
Jan 25 16:03:53 coder-test-nofix-dev coder-agent[2100]: + trap waitonexit EXIT
Jan 25 16:03:53 coder-test-nofix-dev coder-agent[2101]: + mktemp -d -t coder.XXXXXX
Jan 25 16:03:53 coder-test-nofix-dev coder-agent[2100]: + BINARY_DIR=/tmp/coder.6oHHHW
Jan 25 16:03:53 coder-test-nofix-dev coder-agent[2100]: + BINARY_NAME=coder
Jan 25 16:03:53 coder-test-nofix-dev coder-agent[2100]: + BINARY_URL=https://coder.domain/bin/coder-linux-amd64
Jan 25 16:03:53 coder-test-nofix-dev coder-agent[2100]: + cd /tmp/coder.6oHHHW
Jan 25 16:03:53 coder-test-nofix-dev coder-agent[2100]: + :
Jan 25 16:03:53 coder-test-nofix-dev coder-agent[2100]: + status=
Jan 25 16:03:53 coder-test-nofix-dev coder-agent[2100]: + command -v curl
Jan 25 16:03:53 coder-test-nofix-dev coder-agent[2100]: + curl -fsSL --compressed https://coder.domain/bin/coder-linux-amd64 -o coder
Jan 25 16:04:02 coder-test-nofix-dev coder-agent[2100]: + break
Jan 25 16:04:02 coder-test-nofix-dev coder-agent[2100]: + chmod +x coder
Jan 25 16:04:02 coder-test-nofix-dev coder-agent[2100]: + [ -n  ]
Jan 25 16:04:02 coder-test-nofix-dev coder-agent[2100]: + export CODER_AGENT_AUTH=token
Jan 25 16:04:02 coder-test-nofix-dev coder-agent[2100]: + export CODER_AGENT_URL=https://coder.domain/
Jan 25 16:04:02 coder-test-nofix-dev coder-agent[2133]: + ./coder --version
Jan 25 16:04:02 coder-test-nofix-dev coder-agent[2134]: + head -n1
Jan 25 16:04:02 coder-test-nofix-dev coder-agent[2133]: /opt/coder/init: 90: ./coder: Exec format error
Jan 25 16:04:02 coder-test-nofix-dev coder-agent[2100]: + output=
Jan 25 16:04:02 coder-test-nofix-dev coder-agent[2136]: + echo
Jan 25 16:04:02 coder-test-nofix-dev coder-agent[2137]: + grep -q Coder
Jan 25 16:04:02 coder-test-nofix-dev coder-agent[2100]: + echo ERROR: Downloaded agent binary returned unexpected version output
Jan 25 16:04:02 coder-test-nofix-dev coder-agent[2100]: ERROR: Downloaded agent binary returned unexpected version output
Jan 25 16:04:02 coder-test-nofix-dev coder-agent[2100]: + echo coder --version output: ""
Jan 25 16:04:02 coder-test-nofix-dev coder-agent[2100]: coder --version output: ""
Jan 25 16:04:02 coder-test-nofix-dev coder-agent[2100]: + exit 2
Jan 25 16:04:02 coder-test-nofix-dev coder-agent[2100]: + waitonexit
Jan 25 16:04:02 coder-test-nofix-dev coder-agent[2100]: + echo === Agent script exited with non-zero code (2). Sleeping 24h to preserve logs...
Jan 25 16:04:02 coder-test-nofix-dev coder-agent[2100]: === Agent script exited with non-zero code (2). Sleeping 24h to preserve logs...
Jan 25 16:04:02 coder-test-nofix-dev coder-agent[2100]: + sleep 86400

Fix, CAX Instance

Jan 25 16:08:55 coder-ARM64TEST-dev systemd[1]: Starting coder-agent.service - Coder Agent...
Jan 25 16:09:00 coder-ARM64TEST-dev systemd[1]: Started coder-agent.service - Coder Agent.
Jan 25 16:09:00 coder-ARM64TEST-dev coder-agent[2044]: + trap waitonexit EXIT
Jan 25 16:09:00 coder-ARM64TEST-dev coder-agent[2046]: + mktemp -d -t coder.XXXXXX
Jan 25 16:09:00 coder-ARM64TEST-dev coder-agent[2044]: + BINARY_DIR=/tmp/coder.4j7W57
Jan 25 16:09:00 coder-ARM64TEST-dev coder-agent[2044]: + BINARY_NAME=coder
Jan 25 16:09:00 coder-ARM64TEST-dev coder-agent[2044]: + BINARY_URL=https://coder.domain/bin/coder-linux-arm64
Jan 25 16:09:00 coder-ARM64TEST-dev coder-agent[2044]: + cd /tmp/coder.4j7W57
Jan 25 16:09:00 coder-ARM64TEST-dev coder-agent[2044]: + :
Jan 25 16:09:00 coder-ARM64TEST-dev coder-agent[2044]: + status=
Jan 25 16:09:00 coder-ARM64TEST-dev coder-agent[2044]: + command -v curl
Jan 25 16:09:00 coder-ARM64TEST-dev coder-agent[2044]: + curl -fsSL --compressed https://coder.domain/bin/coder-linux-arm64 -o coder
Jan 25 16:09:13 coder-ARM64TEST-dev coder-agent[2044]: + break
Jan 25 16:09:13 coder-ARM64TEST-dev coder-agent[2044]: + chmod +x coder
Jan 25 16:09:13 coder-ARM64TEST-dev coder-agent[2044]: + [ -n  ]
Jan 25 16:09:13 coder-ARM64TEST-dev coder-agent[2044]: + export CODER_AGENT_AUTH=token
Jan 25 16:09:13 coder-ARM64TEST-dev coder-agent[2044]: + export CODER_AGENT_URL=https://coder.domain/
Jan 25 16:09:13 coder-ARM64TEST-dev coder-agent[2069]: + ./coder --version
Jan 25 16:09:13 coder-ARM64TEST-dev coder-agent[2070]: + head -n1
Jan 25 16:09:13 coder-ARM64TEST-dev coder-agent[2044]: + output=Coder v2.29.2+b5360a9 Wed Jan 21 15:45:58 UTC 2026
Jan 25 16:09:13 coder-ARM64TEST-dev coder-agent[2076]: + echo Coder v2.29.2+b5360a9 Wed Jan 21 15:45:58 UTC 2026
Jan 25 16:09:13 coder-ARM64TEST-dev coder-agent[2077]: + grep -q Coder
Jan 25 16:09:13 coder-ARM64TEST-dev coder-agent[2044]: + exec ./coder agent
Jan 25 16:09:13 coder-ARM64TEST-dev coder-agent[2044]: 2026-01-25 16:09:13.467 [info]  agent is starting now

Type of Change

• New module
• New template
• Bug fix
• Feature/enhancement
• Documentation
• Other

Template Information

Path: registry/Excellencedev/templates/hetzner-linux

Testing & Validation

• [] Tests pass (bun test)
• [] Code formatted (bun fmt)
• Changes tested locally

Related Issues

[matifali]

Thanks.

[Copilot]

Pull request overview

Fixes Hetzner CAX (ARM) provisioning failures in the hetzner-linux template by selecting the correct Coder agent architecture instead of hardcoding amd64.

Changes:

• Extend parsed Hetzner server_types metadata to include architecture.
• Add a local mapping from Hetzner architecture (x86/arm) to Coder agent architecture (amd64/arm64) with amd64 fallbacks.
• Update coder_agent to use the derived architecture.