419 lines
9.2 KiB
Markdown
419 lines
9.2 KiB
Markdown
# onyx-dev - Container Server of nbit Informatik GmbH
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onyx-dev.nbit.ch is used to run rootless Podman containers, using Traefik as a Reverse Proxy
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It is the Development Server, the main server is onyx.nbit.ch
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Additionally it acts as a primary nameserver ns1.nbit.ch
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In this directory (/data/onyx-dev_pods), you will find all configuration files to run the containers (with Podman and Kubernetes YAML files)
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Specs:
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- Rocky Linux 10
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- Hetzner Cloud Server CX21
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- 2 vCPUs
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- 4 GB RAM
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- 40 GB Disk
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- Location Nuremberg
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Persistent data is stored in /data
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## Create Server
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Name: onyx-dev.nbit.ch
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Set Root-Password (by hand)
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`
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# dnf update
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# init 6 (Reboot)
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# groupadd containers
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# useradd -m -g containers containers
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# passwd containers
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For containers User, add the following to ~/.bash_profile:
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if [ -z "$XDG_RUNTIME_DIR" ] && [ -d "/run/user/$(id -u)" ]; then
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export XDG_RUNTIME_DIR=/run/user/$(id -u)
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fi
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# hostnamectl set-hostname onyx-dev.nbit.ch
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# timedatectl set-timezone Europe/Zurich
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# dnf install glibc-langpack-de
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# localectl set-locale LANG=en_US.UTF-8
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# localectl set-locale LC_TIME=de_CH.UTF-8
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Set Journalctl-Config to persistent Storage:
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cp /usr/lib/systemd/journald.conf /etc/systemd
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/etc/systemd/journald.conf:
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Storage=persistent
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# Enable Selinux in Enforcing Mode: change /etc/selinux/config
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# dnf install setroubleshoot-server
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Disable kdump:
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systemctl disable --now kdump
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grubby --update-kernel=ALL --remove-args="crashkernel"
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reboot
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`
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enable EPEL Repo (for instance because of fail2ban):
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`
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# dnf install epel-release
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`
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## Firewall
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```bash
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# dnf install firewalld
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# systemctl enable --now firewalld
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# firewall-cmd --add-service={http,https} --permanent
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# firewall-cmd --remove-service=cockpit --permanent
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# firewall-cmd --reload
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List Rules:
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# firewall-cmd --list-all
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```
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## fail2ban on Host for ssh
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```bash
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# dnf install fail2ban
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# cp /etc/fail2ban/jail.conf /etc/fail2ban/jail.local
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edit /etc/fail2ban/jail.local:
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enabled = true => below [sshd]
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# systemctl enable fail2ban
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# systemctl restart fail2ban
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command to check who is banned:
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# fail2ban-client status sshd
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```
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## Install Software
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```bash
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# dnf install passt
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# dnf install git
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# dnf install podman
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# dnf install jq
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# dnf install sysstat
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# dnf install lftp
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# dnf install telnet
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# dnf install binutils
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```
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## Setup Mail
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```bash
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# dnf install s-nail procmail msmtp
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# cp /usr/share/doc/msmtp/msmtprc-system.example /etc/msmtprc
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```
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## Backup Server
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```bash
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# dnf install restic
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# mkdir /backup
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# mkdir /backup-restic
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# restic init --repo /backup-restic/restic-repo-$(hostname --short) # Passwort in Keepass
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SSH Keypaar fuer User root erstellen und auf Hetzner Storagebox hinterlegen:
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# ssh-keygen
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Restic Script:
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/usr/local/bin/backup-to-disk.sh
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#!/bin/bash
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# Backup der wichtigsten Verzeichnisse nach einem Verzeichnis
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#
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# Es wird restic verwendet.
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#
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PATH=$PATH:/usr/local/bin
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export RESTIC_PASSWORD="$(hostname --short)7355"
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restic backup --quiet --repo /backup-restic/restic-repo-$(hostname --short) /home /etc /var /opt /data /usr/local/bin /backup --exclude=/var/log
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if [ $? -eq 0 ]; then
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restic forget --quiet --repo /backup-restic/restic-repo-$(hostname --short) --keep-daily 7 --keep-weekly 5 --keep-monthly 12 --keep-yearly 20 --prune
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else
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>&2 echo "Problem with restic Backup $(hostname --short)"
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fi
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/etc/cron.d/backup-to-disk:
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#
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# Backup important Files to Disk
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#
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55 6 * * * root /usr/local/bin/backup-to-disk.sh >/dev/null
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Backup auf Storag Box:
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# cat > /etc/cron.d/rsync-backup-to-other-host <<HERE
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#
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# Rsync /backup-restic to backup space
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#
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20 7 * * * root /usr/bin/rsync -avzH --delete --numeric-ids -e 'ssh -p23' /backup-restic u152662@u152662.your-storagebox.de:onyx-backup-restic-rsync >/dev/null
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HERE
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```
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List Usage on Storage Box:
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```
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# ssh -p 23 u152662@u152662.your-storagebox.de du -h -d 1
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261G ./arq-backup-mbp
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8.3G ./moby-backup-restic-rsync
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650M ./onyx-dev-backup-restic-rsync
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1.6G ./mb2-backup-rsync
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1.2G ./wobisch2-backup-rsync
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1.6G ./mb1-backup-rsync
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11G ./mail-backup-restic-rsync
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20G ./onyx-backup-restic-rsync
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44G ./cinnamon.nbit.ch
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10K ./.ssh
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348G .
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```
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### Setup Env for Podman
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```bash
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# mkdir /data
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# chown containers:containers /data
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Set Defaults:
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containers$ cat ~/.config/containers/containers.conf
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[network]
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network_backend = "netavark"
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Credentials for Docker Registry should be available after Reboot
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# echo 'net.ipv4.ip_unprivileged_port_start=80' >> /etc/sysctl.d/containers.conf
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# loginctl enable-linger containers
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[containers@onyx-dev ~]$ podman login git.nbit.ch
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Username: jlehmann
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Password:
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Login Succeeded!
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[containers@onyx-dev ~]$ mkdir ~/.config/containers
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[containers@onyx-dev ~]$ cp /run/user/1000/containers/auth.json ~/.config/containers/auth.json
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```
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### Setup Traefik
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Traefik will be started with podman play kube (with yaml file) and attach to HostNetwork (hostNetwork: true in yaml).
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Backends will map there port and will be accessed on localhost:<port>
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we do not use the dynamic config using docker provider, but rather the file provider (one file per backend)
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```bash
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Example Backend Service File:
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[containers@onyx onyx_pods]$ cat traefik/configuration/nbitwebsite.yml
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http:
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routers:
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nbitwebsite:
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entrypoints:
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- websecure
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tls:
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certresolver: "myresolver"
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domains:
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- main: "www.linux-freelancer.ch"
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sans: "linux-freelancer.ch"
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rule: "Host(`linux-freelancer.ch`,`www.linux-freelancer.ch`)"
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service: nbitwebsite
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services:
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nbitwebsite:
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loadBalancer:
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servers:
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- url: http://127.0.0.1:9000/
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passHostHeader: false
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```
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```bash
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# echo 'net.ipv4.ip_unprivileged_port_start=80' >> /etc/sysctl.d/containers.conf
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# loginctl enable-linger containers
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# The following fixes "Failed to connect to bus: No medium found"
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export XDG_RUNTIME_DIR=/run/user/$(id -u)
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containers$ touch /data/traefik/acme.json
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containers$ chmod 0600 /data/traefik/acme.json
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Important: set SELinux Context on /data for containers:
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[root@onyx-dev named]# semanage fcontext -a -s unconfined_u -t container_file_t "/data(/.*)?"
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[root@onyx-dev named]# restorecon -r -v /data
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Check:
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find /data ! -context '*:container_file_t:*'
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/etc/subgid:containers:100000:65536
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/etc/subuid:containers:100000:65536
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!!!!!!!!!!!!!!
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IMPORTANT: we changed the startup Method to Quadlets, put into
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~containers/.config/containers/systemd/
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See also https://www.redhat.com/sysadmin/quadlet-podman
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Example of such a quadlet config (Network=pasta is not to be used for Traefik):
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[containers@onyx-dev ~]$ more ~containers/.config/containers/systemd/onyx-dev-mqtt.kube
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[Unit]
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Description=MQTT
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Before=local-fs.target
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[Kube]
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Yaml=/home/containers/onyx-dev_pods/mqtt/mqtt.yaml
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LogDriver=journald
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Network=pasta
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[Service]
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Restart=always
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RestartSec=15
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TimeoutStartSec=300
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[Install]
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# Start by default on boot
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WantedBy=multi-user.target default.target
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!!!!!!!!!!!!!!
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```
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### Setup Backend Services
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```bash
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Create Kubernetes YAML File:
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backendservice=nbitwebsite
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containers$ mkdir ~/onyx_pods/${backendservice}
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Create File ~/onyx_pods/${backendservice}/${backendservice}.yaml
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```
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## Postfix
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```bash
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# dnf install postfix
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We do not want to accept emails from outside, so we do not change the config (we only listen on localhost)
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# systemctl enable postfix
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# systemctl start postfix
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Creat DNS Records:
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mx1.nbit.ch and mx2.nbit.ch (A/AAAA Records to the same IPs as onyx and onyx-dev)
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Change SPF Records to include mx1 and mx2
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```
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## Primary Nameserver
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```bash
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# dnf install bind bind-utils
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# systemctl enable --now named
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# firewall-cmd --add-service=dns --permanent
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# firewall-cmd --reload
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Adopt /etc/named.conf:
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Important => recursion no
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[root@onyx-dev etc]# diff named.conf named.conf.6nov2026
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11,12c11,12
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< listen-on port 53 { any; };
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< listen-on-v6 port 53 { any; };
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---
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> listen-on port 53 { 127.0.0.1; };
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> listen-on-v6 port 53 { ::1; };
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19,20c19
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< allow-query { any; };
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< version "You are too curious";
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---
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> allow-query { localhost; };
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32c31
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< recursion no;
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---
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> recursion yes;
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61,124d59
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< acl slaves {
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< 95.216.148.212;
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< 2a01:4f9:c010:5dd::1;
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< 23.88.33.113;
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< 2a01:4f8:c010:90e1::1;
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< 5.75.251.111;
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< 2a01:4f8:c012:c21c::1;
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< 127.0.0.1;
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< ::1;
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< };
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<
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< zone "nbit.ch" IN {
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< type master;
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< file "master/nbit.ch.zone";
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< allow-update { none; };
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< allow-transfer {
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< slaves;
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< };
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< };
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<
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< zone "mini-beieli.ch" IN {
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< type master;
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< file "master/mini-beieli.ch.zone";
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< allow-update { none; };
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< allow-transfer {
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< slaves;
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< };
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< };
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<
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< zone "wo-bisch.ch" IN {
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< type master;
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< file "master/wo-bisch.ch.zone";
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< allow-update { none; };
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< allow-transfer {
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< slaves;
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< };
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< };
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<
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< zone "ch-wirth.ch" IN {
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< type master;
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< file "master/ch-wirth.ch.zone";
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< allow-update { none; };
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< allow-transfer {
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< slaves;
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< };
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< };
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<
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< zone "cmoag.com" IN {
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< type master;
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< file "master/cmoag.com.zone";
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< allow-update { none; };
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< allow-transfer {
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< slaves;
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< };
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< };
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<
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< zone "acmoag.com" IN {
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< type master;
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< file "master/acmoag.com.zone";
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< allow-update { none; };
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< allow-transfer {
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< slaves;
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< };
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< };
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on master:
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[root@onyx-dev named]# semanage fcontext -a -t named_cache_t "/var/named/master(/.*)?"
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[root@onyx-dev named]# restorecon -r -v /var/named/master
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...
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```
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