- kubeadm: removed preflight check for `touch` on Linux nodes. ([#129317](https://github.com/kubernetes/kubernetes/pull/129317), [@carlory](https://github.com/carlory)) [SIG Cluster Lifecycle]

With CSI the Kubernetes volume layer becomes truly extensible, allowing third party storage developers to write drivers making their storage systems available in Kubernetes without having to touch the core code.

CSI was first introduction as alpha in Kubernetes v1.9 and moved to beta in Kubernetes v1.10.

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* You can now use `--ipvs-exclude-cidrs` to specify a list of CIDR's which the IPVS proxier should not touch when cleaning up IPVS rules. ([#62083](https://github.com/kubernetes/kubernetes/pull/62083), [@rramkumar1](https://github.com/rramkumar1))

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but see the comment on // rightShift. // // These are the most dangerous lines in the package and maybe in the // library: a single bit of bias in the selection of nonces would likely // lead to key recovery, but no tests would fail. Look but DO NOT TOUCH. if excess := len(b)*8 - c.N.BitLen(); excess > 0 { // Just to be safe, assert that this only happens for the one curve that // doesn't have a round number of bits. if c.curve != p521 { panic("ecdsa: internal error: unexpectedly masking off bits")...