feat: update kubelet to 1.21.0 release

https://github.com/kubernetes/kubernetes/blob/master/CHANGELOG/CHANGELOG-1.21.md

Signed-off-by: Alexey Palazhchenko <[email protected]>

Dockerfile

@@ -9,7 +9,8 @@ ARG KUBELET_SHA512_AMD64
 ARG KUBELET_URL=https://storage.googleapis.com/kubernetes-release/release/${KUBELET_VER}/bin/linux/${TARGETARCH}/kubelet
 
 RUN wget -q -O /kubelet ${KUBELET_URL} \
-  && echo "${KUBELET_SHA512_AMD64}  /kubelet" | sha512sum -c \
+  && sha512sum /kubelet \
+  && echo "${KUBELET_SHA512_AMD64}  /kubelet" | sha512sum -cw \
   && chmod +x /kubelet
 
 FROM alpine:latest as builder-arm64
@@ -20,7 +21,8 @@ ARG KUBELET_SHA512_ARM64
 ARG KUBELET_URL=https://storage.googleapis.com/kubernetes-release/release/${KUBELET_VER}/bin/linux/${TARGETARCH}/kubelet
 
 RUN wget -q -O /kubelet ${KUBELET_URL} \
-  && echo "${KUBELET_SHA512_ARM64}  /kubelet" | sha512sum -c \
+  && sha512sum /kubelet \
+  && echo "${KUBELET_SHA512_ARM64}  /kubelet" | sha512sum -cw \
   && chmod +x /kubelet
 
 ARG TARGETARCH

Makefile

@@ -5,9 +5,9 @@ TAG ?= $(shell git describe --tag --always --dirty)
 BRANCH ?= $(shell git rev-parse --abbrev-ref HEAD)
 REGISTRY_AND_USERNAME := $(REGISTRY)/$(USERNAME)
 NAME := kubelet
-KUBELET_VER := v1.21.0-rc.0
-KUBELET_SHA512_AMD64 := d26694994a3e3f6d187ace1b5375d08e65bb1cd2753fdfdb43917e63ac2a41cac43f745631f2882bc8dde4c6770b5c899490a50096c7f82405d284a0df39ecbc
-KUBELET_SHA512_ARM64 := a30b40f135e8b005f2c91bd1ee989be3c21b1ebe8423104a24ffe4c47ae7e35540075fa5c3f4978bc7db5fa5f44c5651c3ff8630fb6dba3acb5a3ea94418d384
+KUBELET_VER := v1.21.0
+KUBELET_SHA512_AMD64 := 530689c0cc32ef1830f7ae26ac10995f815043d48a905141e23a34a5e61522c4ee2ff46953648c47c5592d7c2ffa40ce90469a697f36f68475b8da5abd73f9f5
+KUBELET_SHA512_ARM64 := fc2a7e3ae6d44c0e384067f8e0bcd47b0db120d03d06cc8589c601f618792959ea894cf3325df8ab4902af23ded7fd875cf4fe718be0e67ad990a7559e4a8b1a
 
 BUILD := docker buildx build
 PLATFORM ?= linux/amd64,linux/arm64