etcdctl 사용 이유 master1이 down되면 master2가 리더가되어 etcd write 권한을 얻게 된다. 그리고 관련 정보도 sync 되어 ha 구성을 할 수 있다. etcdctl 설치 Releases · etcd-io/etcd Distributed reliable key-value store for the most critical data of a distributed system - etcd-io/etcd github.com ETCD_VER=v3.4.29 # choose either URL GOOGLE_URL=https://storage.googleapis.com/etcd GITHUB_URL=https://github.com/etcd-io/etcd/releases/download DOW..

/etc/hosts 노드 정보 추가 # update-hosts-playbook.yaml - name: Update /etc/hosts hosts: node become: true # Run all tasks with sudo tasks: - name: Add entries to /etc/hosts lineinfile: path: "/etc/hosts" line: "{{ item }}" with_items: - "192.168.0.200 k8s-lb" - "192.168.0.201 master1" - "192.168.0.202 master2" - "192.168.0.203 master3" - "192.168.0.204 worker1" - "192.168.0.205 worker2" - "192.168.0.2..

재부팅 시 kubernetes 안올라올 때 swapoff -a # 제일 중요 systemctl enable kubelet && systemctl start kubelet Unable to connect to the server: tls: failed to verify certificate: x509 export KUBECONFIG=/etc/kubernetes/admin.conf reset kubernetes sudo kubeadm reset --force sudo systemctl restart kubelet rm -rf $HOME/.kube/* rm /etc/cni/net.d sudo reboot [ERROR FileContent--proc-sys-net-bridge-bridge-nf-call-ipta..

기본 환경 Ubuntu 20.04 환경에서 Stable하게 성공했습니다. Static hostname: master Icon name: computer-vm Chassis: vm Machine ID: 6685ed20e74d4a84909769d1d1e80123 Boot ID: 17e47d7f4e5440afb37fb21d0777bcc5 Virtualization: kvm Operating System: Ubuntu 20.04.6 LTS Kernel: Linux 5.4.0-169-generic Architecture: x86-64 세줄요약 단일구성 - 마스터노드 초기화 후 마스터노드로 워커노드 조인 - CNI 설정 - 온프레미스 metallb 설치 다중구성 - 각 마스터노드에 keepalived 설치 및 MA..

https://mailinabox.email/guide.html Mail-in-a-Box Setup Guide The first step in setting up a Mail-in-a-Box is to pick your new email address. An email address has two parts. The part after the @-sign is the domain name. Each domain name is owned by someone, and you are going to be the owner of your own. Josh’s emai mailinabox.email TroubleShooting 설치가 에러없이 뚝하고 끊키는 경우 proxmox lxc 말고 VM ubuntu 22...

https://github.com/mailhog/MailHog GitHub - mailhog/MailHog: Web and API based SMTP testing Web and API based SMTP testing. Contribute to mailhog/MailHog development by creating an account on GitHub. github.com https://www.youtube.com/watch?v=Pmvsqak417A

apt install mailutils echo "Hello world" | mail -s "Test" james@example.com

OS Ubuntu 20.04 이하로 지원 Installation Log into the Linux based device Run the following commands in the terminal # update software repositories sudo apt update # install available software updates sudo apt upgrade -y # create a working directory and change to it mkdir ./zulip && cd ./zulip # download zulip wget https://www.zulip.org/dist/releases/zulip-server-latest.tar.gz # extract the tar.gz tar..

GOOGLE SMTP가 안되는 현상이 있어서 네이버 SMTP 로 활용했다. 설정하는데 너무 스트래스였다. https://github.com/Leantime/docker-leantime GitHub - Leantime/docker-leantime: Official Docker Image for Leantime https://leantime.io Official Docker Image for Leantime https://leantime.io - GitHub - Leantime/docker-leantime: Official Docker Image for Leantime https://leantime.io github.com 앞단에 CloudFlare 리버스 프록시를 가져다쓰면 추가설정이 필요하니 그냥 포트 ..

Internet Gateway(192.168.0.1) Router(192.168.0.254/10.10.10.254) - sysctl -w net.ipv4.ip_forward=1 Internal Server(10.10.10.2) Internal Server에서 Router를 거쳐서 Internet Gateway로 가기위해서는 Router 역할을 하는 서버에서 패킷 포워딩을 해주어야한다. 외부에서 Internal Server로 접근하기 위해서는 Internet Gateway가 Router에 물어보라고 라우팅 테이블을 설정해줘야한다.