fix(bootstrap): use host cgroup namespace for gateway container#329
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fix(bootstrap): use host cgroup namespace for gateway container#329
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Docker Desktop 29.x defaults to private cgroupns which prevents k3s kubelet from accessing cgroup v2 controllers (cpu, cpuset, memory, pids, hugetlb). This causes ContainerManager to fail during startup. Explicitly set cgroupns_mode to host, which is backwards compatible with all Docker versions and matches what k3s-in-Docker tooling (k3d) requires.
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pimlock
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Mar 16, 2026
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Summary
cgroupns_mode: hoston the gateway Docker container to fix k3s startup failures on Docker Desktop 29.x with cgroup v2cgroup ["kubepods"] has some missing controllers: cpu, cpuset, hugetlb, memory, pidsRoot Cause
Docker Desktop 29.x (Docker Engine 28.x+) defaults to
cgroupns: private. With cgroup v2, a private cgroup namespace doesn't delegate the required controllers into the container's namespace. The k3s kubelet then fails to create QoS cgroup hierarchy for pod management.Fix
Explicitly set
cgroupns_mode: hostinHostConfigwhen creating the gateway container. This is:privileged: trueTesting
openshell gateway starton Docker Desktop 29.2.1 / macOS 26.2 / cgroup v2cargo check -p openshell-bootstrappassesmise run pre-commitpasses