树莓派使用(CentOS7.9 armv71 Kubernetes1.19.0)_raspios开启root-优快云博客

本文链接：https://blog.youkuaiyun.com/Yuan_xii/article/details/126233204

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and note your problem

1.Official FlashTools

2. Raspi 4B install RaspiOS

选择树莓派操作系统，并在右下角进行wifi及用户名配置
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修改树莓派配置文件

在boot目录下新建sshd空白文件，使得linux允许ssh登录

3.set up root password and allow login by root

# 修改该文件添加 PermitRootLogin yes，如下图
nano /etc/ssh/sshd_config
# 修改root密码
sudo passwd root
systemctl restart sshd
# 重新登录即可使用root账户登录

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4.connect your raspi through VNServer

vncserver

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5. Raspi 4B install CentOS 7.9

5.1. download Raspi4B Image

CentOS Raspi Official Image
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5.2. Writing CentOS 7.9 Image into SD Card

balenaEtcher

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then choose the SD Card and flash!

5.3. throwing error(if not, skip)

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Solution:
Replace start4.elf and fixup4.dat
you can find here

download start4.elf and fixup4.elf
replace them in your SD Card

5.4. Start CentOS

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默认账号： root
默认密码：centos

5.6 Expand Disk Space

rootfs-expand
df -h

5.5. Connect to Wifi

# syntax_error: 为wifi名称
nmcli dev wifi con "syntax_error" password "${password}"
nmcli con mod syntax_error ipv4.addresses 192.168.31.175/24
nmcli con mod syntax_error ipv4.gateway 192.168.31.1
nmcli con mod syntax_error ipv4.dns "192.168.31.1"
nmcli con mod syntax_error ipv4.method maunal
nmcli con up syntax_error

6. Raspi 4B install Kubernetes1.19.0

Question Found: Raspi armv71 CentOS7.9 cannot add kubernetes software source from aliyun or other source
key： armv71 兼容 arm32
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6.1.Installing docker

yum install docker

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6.2. Network Configuration

cat <<EOF | sudo tee /etc/modules-load.d/k8s.conf
overlay
br_netfilter
EOF

sudo modprobe overlay
sudo modprobe br_netfilter

# 设置所需的 sysctl 参数，参数在重新启动后保持不变
cat <<EOF | sudo tee /etc/sysctl.d/k8s.conf
net.bridge.bridge-nf-call-iptables  = 1
net.bridge.bridge-nf-call-ip6tables = 1
net.ipv4.ip_forward                 = 1
EOF

# 应用 sysctl 参数而不重新启动
sudo sysctl --system
yum install conntrack

6.3.Installing CNI plugin

Github CNI Plugins
Choose a cni that fit your system, like

curl https://github.com/containernetworking/plugins/releases/download/v1.1.1/cni-plugins-linux-arm-v1.1.1.tgz
rm -rf /opt/cni/bin
cd /opt/cni/bin
tar -zxvf cni-plugins-linux-arm-v1.1.1.tgz

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6.4.Configuring Cgroup_memory and switch off swap

vim /boot/cmdline.txt
reboot
# wait for about 3-4minutes and relogin

swapoff -a
# annotate the swap part, see below
vim /etc/fstab

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6.5.Download kubeadm kubelet kubectl

You can find your kubernetes version 1.19.0 tools in
Sotrage Google
or you can modify the kubernetes version to what you want.

# arm
wget https://storage.googleapis.com/kubernetes-release/release/v1.19.0/kubernetes-server-linux-arm.tar.gz
# amd64
wget https://storage.googleapis.com/kubernetes-release/release/v1.19.0/kubernetes-server-linux-amd64.tar.gz
# arm64
wget https://storage.googleapis.com/kubernetes-release/release/v1.19.0/kubernetes-server-linux-arm64.tar.gz
# ppc641e
wget https://storage.googleapis.com/kubernetes-release/release/v1.19.0/kubernetes-server-linux-ppc64le.tar.gz
# s390x
wget https://storage.googleapis.com/kubernetes-release/release/v1.19.0/kubernetes-server-linux-s390x.tar.gz
# for arm
tar -zxvf kubernetes-server-linux-arm.tar.gz

cp kubectl /usr/bin/
cp kubeadm /usr/bin/
cp kubelet /usr/bin/
kubectl version
kubeadm version
kubelet version

6.6.Configure kubelet

# create a system service for kubelet
cd /usr/lib/systemd/system
vim kubelet.service
[Unit]
Description=kubelet: The Kubernetes Node Agent
Documentation=https://kubernetes.io/docs/
Wants=network-online.target
After=network-online.target

[Service]
ExecStart=/usr/bin/kubelet
Restart=on-failure


[Install]
WantedBy=multi-user.target

# this dir will automatically recoginized as configuraion dir for kubelet.service
mkdir kubelet.service.d
cd kubelet.service.d
vim 10-kubeadm.conf
# Note: This dropin only works with kubeadm and kubelet v1.11+
[Service]
Environment="KUBELET_KUBECONFIG_ARGS=--bootstrap-kubeconfig=/etc/kubernetes/bootstrap-kubelet.conf --kubeconfig=/etc/kubernetes/kubelet.conf"
Environment="KUBELET_CONFIG_ARGS=--config=/var/lib/kubelet/config.yaml"
# This is a file that "kubeadm init" and "kubeadm join" generates at runtime, populating the KUBELET_KUBEADM_ARGS variable dynamically
EnvironmentFile=-/var/lib/kubelet/kubeadm-flags.env
# This is a file that the user can use for overrides of the kubelet args as a last resort. Preferably, the user should use
# the .NodeRegistration.KubeletExtraArgs object in the configuration files instead. KUBELET_EXTRA_ARGS should be sourced from this file.
EnvironmentFile=-/etc/sysconfig/kubelet
ExecStart=
ExecStart=/usr/bin/kubelet $KUBELET_KUBECONFIG_ARGS $KUBELET_CONFIG_ARGS $KUBELET_KUBEADM_ARGS $KUBELET_EXTRA_ARGS

vim /var/lib/kubelet/kubeadm-flags.env
KUBELET_KUBEADM_ARGS="--network-plugin=cni --pod-infra-container-image=registry.aliyuncs.com/google_containers/pause:3.2 --cgroup-driver=systemd"

6.7. Start Kubeadm

kubeadm init --kubernetes-version=v1.19.0 --service-cidr=10.1.0.0/16 --pod-network-cidr=10.244.0.0/16 --v=10 --image-repository="registry.aliyuncs.com/google_containers

mkdir -p $HOME/.kube
sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
sudo chown $(id -u):$(id -g) $HOME/.kube/config


kubectl get node

wget https://raw.githubusercontent.com/flannel-io/flannel/master/Documentation/kube-flannel.yml -O flannel.yaml

docker pull docker.io/rancher/mirrored-flannelcni-flannel-cni-plugin:v1.1.0
kubectl apply -f flannel.yaml