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docs/faq: second example for passing additional args to k3s

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iwilltry42 2020-08-13 08:00:07 +02:00
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@ -18,12 +18,12 @@
## Pods evicted due to lack of disk space
- Pods go to evicted state after doing X
- Related issues: [#133 - Pods evicted due to `NodeHasDiskPressure`](https://github.com/rancher/k3d/issues/133) (collection of #119 and #130)
- Background: somehow docker runs out of space for the k3d node containers, which triggers a hard eviction in the kubelet
- Possible [fix/workaround by @zer0def](https://github.com/rancher/k3d/issues/133#issuecomment-549065666):
- use a docker storage driver which cleans up properly (e.g. overlay2)
- clean up or expand docker root filesystem
- change the kubelet's eviction thresholds upon cluster creation: `k3d cluster create --k3s-agent-arg '--kubelet-arg=eviction-hard=imagefs.available<1%,nodefs.available<1%' --k3s-agent-arg '--kubelet-arg=eviction-minimum-reclaim=imagefs.available=1%,nodefs.available=1%'`
- Related issues: [#133 - Pods evicted due to `NodeHasDiskPressure`](https://github.com/rancher/k3d/issues/133) (collection of #119 and #130)
- Background: somehow docker runs out of space for the k3d node containers, which triggers a hard eviction in the kubelet
- Possible [fix/workaround by @zer0def](https://github.com/rancher/k3d/issues/133#issuecomment-549065666):
- use a docker storage driver which cleans up properly (e.g. overlay2)
- clean up or expand docker root filesystem
- change the kubelet's eviction thresholds upon cluster creation: `k3d cluster create --k3s-agent-arg '--kubelet-arg=eviction-hard=imagefs.available<1%,nodefs.available<1%' --k3s-agent-arg '--kubelet-arg=eviction-minimum-reclaim=imagefs.available=1%,nodefs.available=1%'`
## Restarting a multi-server cluster or the initializing server node fails
@ -33,9 +33,14 @@
- What's the solution: Hopefully, this will be solved by the planned [replacement of dqlite with embedded etcd in k3s](https://github.com/rancher/k3s/pull/1770)
- Related issues: [#262](https://github.com/rancher/k3d/issues/262)
## Setting Kubernetes API Server flags (e.g. to enable feature flags)
## Passing additional arguments/flags to k3s (and on to e.g. the kube-apiserver)
- The Problem: Passing a feature flag to the Kubernetes API Server running inside k3s.
- Example: you want to enable the EphemeralContainers feature flag in Kubernetes
- Solution: `#!bash k3d cluster create --k3s-server-arg '--kube-apiserver-arg=feature-gates=EphemeralContainers=true'`
- Note: Be aware of where the flag require dashes (`--`) and where not.
- Note: Be aware of where the flags require dashes (`--`) and where not.
- the k3s flag (`--kube-apiserver-arg`) has the dashes
- the kube-apiserver flag `feature-gates` doesn't have them (k3s adds them internally)
- Second example: `#!bash k3d cluster create k3d-one --k3s-server-arg --cluster-cidr="10.118.0.0/17" --k3s-server-arg --service-cidr="10.118.128.0/17" --k3s-server-arg --disable=servicelb --k3s-server-arg --disable=traefik --verbose`
- Note: There are many ways to use the `"` and `'` quotes, just be aware, that sometimes shells also try to interpret/interpolate parts of the commands