Category Archives: Linux

Kubernetes借助vpn打通本地和集群内网

1 搭建集群

搭建Kubernetes集群，可以参考《Ubuntu 18.04快速部署Kubernetes集群
》网络类型选择calico。

2 基本配置

执行如下脚本 config_openvpn_test.sh

#!/bin/bash
VOLUME="$HOME/openvpn"
vpn_ip="vpn.coder4.com"
# init for first time only
rm -rf $VOLUME
mkdir -p $VOLUME 
docker run -v $VOLUME:/etc/openvpn --rm kylemanna/openvpn ovpn_genconfig -u udp://$vpn_ip -s 10.4.0.0/24
docker run -v $VOLUME:/etc/openvpn --rm -it kylemanna/openvpn ovpn_initpki

#!/bin/bash

VOLUME="$HOME/openvpn"

vpn_ip="vpn.coder4.com"

# init for first time only

rm -rf $VOLUME

mkdir -p $VOLUME

docker run -v $VOLUME:/etc/openvpn --rm kylemanna/openvpn ovpn_genconfig -u udp://$vpn_ip -s 10.4.0.0/24

docker run -v $VOLUME:/etc/openvpn --rm -it kylemanna/openvpn ovpn_initpki

3. 创建docker

./run_openvpn_test.sh

#!/bin/bash

# submit to tool node
NAME="openvpn"
VOLUME="$HOME/openvpn"
dns_ip="10.96.0.10"

# stop & run server (should call init_open_vpn_test.sh before) 
docker ps -q -a --filter "name=$NAME" | xargs -I {} docker rm -f {}
docker run \
    --name $NAME \
    --network bridge \
    --dns $dns_ip \
    -d \
    -v $VOLUME:/etc/openvpn \
    -p 1194:1194/udp \
    --cap-add=NET_ADMIN \
    --restart always \
    kylemanna/openvpn \
    ovpn_run --cipher AES-128-CBC

#!/bin/bash

# submit to tool node

NAME="openvpn"

VOLUME="$HOME/openvpn"

dns_ip="10.96.0.10"

# stop & run server (should call init_open_vpn_test.sh before)

docker ps -q -a --filter "name=$NAME" | xargs -I {} docker rm -f {}

docker run \

--name $NAME \

--network bridge \

--dns $dns_ip \

-d \

-v $VOLUME:/etc/openvpn \

-p 1194:1194/udp \

--cap-add=NET_ADMIN \

--restart always \

kylemanna/openvpn \

ovpn_run --cipher AES-128-CBC

4. 生成客户端配置文件
[crayon-5[……]

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Ubuntu 18.04快速部署Kubernetes集群

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1. 主机分别准备docker & kubernetes环境(3台分别执行)

# docker
sudo apt-get update && sudo apt-get install -y apt-transport-https
sudo apt install -y docker.io
sudo systemctl start docker
sudo systemctl enable docker

# kubernetes
sudo curl -s https://packages.cloud.google.com/apt/doc/apt-key.gpg | apt-key add 
sudo echo "deb http://apt.kubernetes.io/ kubernetes-xenial main" > /etc/apt/sources.list.d/kubernetes.list
sudo apt-get update
sudo apt-get install -y kubelet kubeadm kubectl kubernetes-cni

# docker

sudo apt-get update && sudo apt-get install -y apt-transport-https

sudo apt install -y docker.io

sudo systemctl start docker

sudo systemctl enable docker

# kubernetes

sudo curl -s https://packages.cloud.google.com/apt/doc/apt-key.gpg | apt-key add

sudo echo "deb http://apt.kubernetes.io/ kubernetes-xenial main" > /etc/apt/sources.list.d/kubernetes.list

sudo apt-get update

sudo apt-get install -y kubelet kubeadm kubectl kubernetes-cni

备注：

如果上述源连不上，可以用ustc的：

deb http://mirrors.ustc.edu.cn/kubernetes/apt kubernetes-xenial main

1	deb http://mirrors.ustc.edu.cn/kubernetes/apt kubernetes-xenial main

2. 初始化集群master(k8s1)

这里有个神坑，master的CPU核心必须在两个或以上。

集群初始化，其中第一个IP是你的内网IP，第二个是你希望Pod所使用的IP地址范围，牢记最后的输出，后面会用[……]

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Vultr内网设置脚本(适用Ubuntu 18.04)

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#!/bin/sh

if [ x"$1" = x"" ]; then
    echo "Usage: $0 private_ip/subnet"
    exit -1
fi

IP="$1"
SUBNET="16"

if [ x"$2" != x"" ]; then
    SUBNET="$2"
fi

sudo cat <<EOF > /etc/netplan/10-ens7.yaml
network:
  version: 2
  renderer: networkd
  ethernets:
    ens7:
      mtu: 1450
      dhcp4: no
      addresses: [$IP/$SUBNET]
EOF

sudo netplan apply

#!/bin/sh

if [ x"$1" = x"" ]; then

echo "Usage: $0 private_ip/subnet"

exit -1

IP="$1"

SUBNET="16"

if [ x"$2" != x"" ]; then

SUBNET="$2"

sudo cat <<EOF > /etc/netplan/10-ens7.yaml

network:

version: 2

renderer: networkd

ethernets:

ens7:

mtu: 1450

dhcp4: no

addresses: [$IP/$SUBNET]

EOF

sudo netplan apply

docker如何将镜像从一台机器转移到另外一台

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docker save -o <path for generated tar file> <image name>

docker load -i <path to image tar file>

docker save -o <path for generated tar file> <image name>

docker load -i <path to image tar file>

打印log中某一列

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例如包含userId的

awk -F '\t' '{for(i=1; i<=NF; i++){if ($i ~ /.*user_id.*/){print $i}}}'

1	awk -F '\t' '{for(i=1; i<=NF; i++){if ($i ~ /.user_id./){print $i}}}'

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Keep It Simple And Stupid

Category Archives: Linux

Kubernetes借助vpn打通本地和集群内网

Ubuntu 18.04快速部署Kubernetes集群

Vultr内网设置脚本(适用Ubuntu 18.04)

docker如何将镜像从一台机器转移到另外一台

打印log中某一列