同事介绍了一个轻量型的容器集群解决方案，我快速在自己电脑上搭了一下，记录一下。
因为不能够用Docker desktop for Mac, 用的是Orbstack，因为issue#291，所以我只能够创建3个Linux Machine来实现。
orb -m debian就可以ssh进去debian这个虚拟机。
首先安装依赖包
apt update && apt install lsb-release wget curl gpg coreutils ca-certificates
加个宿主机的代理
拉镜像快点
alias proxy='export https_proxy=http://host.orb.internal:9800 http_proxy=http://host.orb.internal:9800 all_proxy=socks5://host.orb.internal:9800'
alias unproxy='unset all_proxy http_proxy https_proxy'
更新一下命令行
source ~/.bashrc
proxy
安装docker
for pkg in docker.io docker-doc docker-compose podman-docker containerd runc; do sudo apt-get remove $pkg; done
# Add Docker's official GPG key:
sudo apt-get update
sudo apt-get install ca-certificates curl
sudo install -m 0755 -d /etc/apt/keyrings
sudo curl -fsSL https://download.docker.com/linux/debian/gpg -o /etc/apt/keyrings/docker.asc
sudo chmod a+r /etc/apt/keyrings/docker.asc
# Add the repository to Apt sources:
echo \
"deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.asc] https://download.docker.com/linux/debian \
$(. /etc/os-release && echo "$VERSION_CODENAME") stable" | \
sudo tee /etc/apt/sources.list.d/docker.list > /dev/null
sudo apt-get update
sudo apt-get install docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin
安装Nomad
wget -O - https://apt.releases.hashicorp.com/gpg | sudo gpg --dearmor -o /usr/share/keyrings/hashicorp-archive-keyring.gpg
echo "deb [arch=$(dpkg --print-architecture) signed-by=/usr/share/keyrings/hashicorp-archive-keyring.gpg] https://apt.releases.hashicorp.com $(lsb_release -cs) main" | sudo tee /etc/apt/sources.list.d/hashicorp.list
sudo apt update && sudo apt install nomad
定义Nomad service
sudo touch /etc/systemd/system/nomad.service
[Unit]
Description=Nomad
Documentation=https://www.nomadproject.io/docs/
Wants=network-online.target
After=network-online.target
# When using Nomad with Consul it is not necessary to start Consul first. These
# lines start Consul before Nomad as an optimization to avoid Nomad logging
# that Consul is unavailable at startup.
#Wants=consul.service
#After=consul.service
[Service]
# Nomad server should be run as the nomad user. Nomad clients
# should be run as root
# User=nomad
# Group=nomad
ExecReload=/bin/kill -HUP $MAINPID
ExecStart=/usr/bin/nomad agent -config /etc/nomad.d
KillMode=process
KillSignal=SIGINT
LimitNOFILE=65536
LimitNPROC=infinity
Restart=on-failure
RestartSec=2
## Configure unit start rate limiting. Units which are started more than
## *burst* times within an *interval* time span are not permitted to start any
## more. Use `StartLimitIntervalSec` or `StartLimitInterval` (depending on
## systemd version) to configure the checking interval and `StartLimitBurst`
## to configure how many starts per interval are allowed. The values in the
## commented lines are defaults.
# StartLimitBurst = 5
## StartLimitIntervalSec is used for systemd versions >= 230
# StartLimitIntervalSec = 10s
## StartLimitInterval is used for systemd versions < 230
# StartLimitInterval = 10s
TasksMax=infinity
OOMScoreAdjust=-1000
[Install]
WantedBy=multi-user.target
启动Nomad
sudo systemctl enable nomad
sudo systemctl start nomad
命令行查看集群情况
nomad server members
Name Address Port Status Leader Raft Version Build Datacenter Region
debian.global 198.19.249.222 4648 alive true 3 1.9.5 dc1 global
web.global 198.19.249.226 4648 alive false 3 1.9.5 dc1 global
worker.global 198.19.249.141 4648 alive false 3 1.9.5 dc1 global
也可以通过浏览器http://localhost:4646/ui/servers查看集群的情况。