bump: golang v1.21.5

- also update hacking scripts and troubleshooting

fixes: #76

Dockerfile

@@ -1,4 +1,4 @@
-FROM golang:1.21.5-alpine3.19 AS build
+FROM golang:1.21.6-bookworm AS build
 WORKDIR /src
 COPY . .
 

Makefile

@@ -5,7 +5,7 @@ GITCOMMITID=$(shell git rev-parse HEAD)
 tidy: 
 	./gomodtidy.sh
 
-docker:
+builddocker:
 	docker build -t footprintai/multikf:v1 \
 		--no-cache -f Dockerfile .
 	docker push footprintai/multikf:v1

hack/kubeadm/0.install_kubeadm.sh

@@ -14,34 +14,21 @@
 
 mkdir -p /etc/apt/keyrings
 
+## install v1.25
+
 echo "deb [signed-by=/etc/apt/keyrings/kubernetes-apt-keyring.gpg] https://pkgs.k8s.io/core:/stable:/v1.25/deb/ /" |  tee /etc/apt/sources.list.d/kubernetes.list
 curl -fsSL https://pkgs.k8s.io/core:/stable:/v1.25/deb/Release.key |  gpg --dearmor -o /etc/apt/keyrings/kubernetes-apt-keyring.gpg
-
-## verify pager /etc/apt/sources.list.d/kubernetes.list
-## deb [signed-by=/etc/apt/keyrings/kubernetes-apt-keyring.gpg] https://pkgs.k8s.io/core:/stable:/v1.25/deb/ /
-
 apt-get update
 apt-get install -y kubelet=1.25.14-1.1 kubeadm=1.25.14-1.1 kubectl=1.25.14-1.1
-apt-mark hold kubeadm kubelet kubectl
 
-## version v1.24.17 (this requires additional configuration as apt-get would do that)
-#curl -LO https://dl.k8s.io/release/v1.24.17/bin/linux/amd64/kubectl \
-#        && chmod +x kubectl \
-#        && mv kubectl /usr/bin/
-#curl -LO https://dl.k8s.io/release/v1.24.17/bin/linux/amd64/kubeadm \
-#        && chmod +x kubeadm \
-#        && mv kubeadm /usr/bin/
-#curl -LO https://dl.k8s.io/release/v1.24.17/bin/linux/amd64/kubelet \
-#        && chmod +x kubelet \
-#        && mv kubelet /usr/bin/
-## install crictl
-#curl -LO https://github.com/kubernetes-sigs/cri-tools/releases/download/v1.26.0/crictl-v1.26.0-linux-amd64.tar.gz \
-#        && tar xzvf crictl-v1.26.0-linux-amd64.tar.gz \
-#        && chmod +x crictl \
-#        && mv crictl /usr/bin/
-# add missing package
-# apt-get install ethtool socat conntrack -y
+### install v1.27.15
+#echo "deb [signed-by=/etc/apt/keyrings/kubernetes-apt-keyring.gpg] https://pkgs.k8s.io/core:/stable:/v1.27/deb/ /" |  tee /etc/apt/sources.list.d/kubernetes.list
+#curl -fsSL https://pkgs.k8s.io/core:/stable:/v1.27/deb/Release.key |  gpg --dearmor -o /etc/apt/keyrings/kubernetes-apt-keyring.gpg
+#apt-get update
+#apt-get install -y kubelet=1.27.15-1.1 kubeadm=1.27.15-1.1 kubectl=1.27.15-1.1
+#
 
+apt-mark hold kubeadm kubelet kubectl
 
 # if encountered the following error during install kubelet
 # W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: https://packages.cloud.google.com/apt kubernetes-xenial InRelease: NO_PUBKEY B53DC80D13EDEF05

hack/troubleshooting.md

@@ -39,3 +39,14 @@ then run `sudo sysctl -p` to update such changes into system
 during installation gpu-operator on kind (kubernetes in docker), `nvidia-operator-validator-67zsz` would failed to run due to `/sbin/ldconfig.real` is not found.
 the simple workaround would be fixed with the symbolic link: `ln -s /sbin/ldconfig /sbin/ldconfig.real`
 
+#### etcd keep rebooting ####
+
+when your etcd is keep rebooting, especially you are using kubeadm with v1.27+,
+you might want to turn the flag on by editing the file `/etc/containerd/config.toml` :
+
+```
+[plugins."io.containerd.grpc.v1.cri".containerd.runtimes.runc.options]
+    SystemdCgroup = true
+```
+
+ref issue: https://github.com/etcd-io/etcd/issues/13670