#OS - RANCHER
Different operating setups with rancher 

#### FLATCAR 

rancher cluster.yml for coreos/flatcar
canal network provider
````
  network:
    mtu: 0
    options:
      flannel_backend_type: vxlan
      canal_flex_volume_plugin_dir: "/opt/kubernetes/kubelet-plugins/volume/exec/nodeagent~uds"
    plugin: canal

  services:
    kube-controller:
      extra_args:
        flex-volume-plugin-dir: "/opt/kubernetes/kubelet-plugins/volume/exec/"
````

calico network provider

````
  network:
    mtu: 0
    options:
      flannel_backend_type: vxlan
      calico_flex_volume_plugin_dir: "/opt/kubernetes/kubelet-plugins/volume/exec/nodeagent~uds"
    plugin: calico

  services:
    kube-controller:
      extra_args:
        flex-volume-plugin-dir: "/opt/kubernetes/kubelet-plugins/volume/exec/"
````

PXE SETUP
````
:flatcar
kernel http://$IP/flatcar/images/flatcar_production_pxe.vmlinuz append flatcar.first_boot=1 root=/dev/sda1 ignition.config.url=http://$IP/flatcar/pxe-config.ign
initrd http://$IP/flatcar/images/flatcar_production_pxe_image.cpio.gz
boot

:flatcar-init
kernel http://$IP/flatcar/images/flatcar_production_pxe.vmlinuz coreos.config.url=http://$IP/flatcar/init.ign cloud-config-url=http://$IP/flatcar/cloud-control.sh flatcar.first_boot=1
initrd http://$IP/flatcar/images/flatcar_production_pxe_image.cpio.gz
boot
````
init.yml
````
storage:
  disks:
  - device: /dev/sda
    wipe_table: true
    partitions:
    - label: ROOT
  filesystems:
  - mount:
      device: /dev/disk/by-partlabel/ROOT
      format: ext4
      wipe_filesystem: true
      label: ROOT

````
cloud-control
````
#!/bin/bash

# local disk install
# curl -kO https://$IP/flatcar/pxe-config.ign
# sudo flatcar-install -d /dev/sda -i pxe-config.ign
sudo reboot

````


pxe-config
````
networkd:
  units:
    - name: 00-ens.network
      contents: |
        [Match]
        Name=ens*

        [Network]
        LinkLocalAddressing=ipv4
        DHCP=yes
storage:
  files:
    - path: /etc/modules-load.d/nf.conf
      filesystem: root
      mode: 0644
      contents:
        inline: |
          nf_conntrack
    - path: /etc/modules-load.d/iscsi.conf
      filesystem: root
      mode: 0644
      contents:
        inline: |
          iscsi_tcp
    - path: /etc/sysctl.d/nf.conf
      filesystem: root
      mode: 0644
      contents:
        inline: |
          fs.inotify.max_user_watches = 1048576
          vm.max_map_count = 262144
          net.ipv4.conf.all.forwarding = 1
          vm.swappiness = 0
          vm.overcommit_memory = 1
          kernel.panic = 10
          kernel.panic_on_oops = 1
    - path: /etc/motd.d/pi.conf
      filesystem: root
      mode: 0644
      contents:
        inline: PI MONSTER
    - filesystem: "root"
      path: "/opt/get-metadata.sh"
      mode: 0755
      contents:
        remote:
          url: "https://$IP/flatcar/metadata-script.sh"
    - path: /etc/systemd/timesyncd.conf
      filesystem: root
      mode: 0644
      contents:
        inline: |
          [Time]
          NTP=ntp0.rug.nl
  directories: 
    - path: /mnt/snapshots
      filesystem: root
      overwrite: true
      mode: 0755
systemd:
  units:
    - name: vmware.service
      enable: true
      contents: | 
        [Unit]
        Description=Service for virtual machines hosted on VMware
        
        [Service]
        Restart=yes
        ExecStart=/usr/bin/docker run --rm --net=host -v /run/systemd:/run/systemd --name open-vm-tools registry.webhosting.rug.nl/k8s/vmwaretools:latest
        Type=oneshot
        RemainAfterExit=true    
        
        [Install]
        WantedBy=multi-user.target
    - name: mnt-snapshots.mount
      enable: true
      contents: | 
        [Unit]    
        Description=Mount for rancher service volumes
        Before=timezone.service
        [Mount]
        What=$IP:/home/www/snapshot
        Where=/mnt/snapshots
        Type=nfs
        [Install]
        WantedBy=remote-fs.target
    - name: sshd.socket
      dropins:
      - name: 10-sshd-port.conf
        contents: |
          [Socket]
          ListenStream=
          ListenStream=8822
    - name: timezone.service
      enable: true
      contents: |
        [Unit]
        Before=rancher.service
        Description=Set timezone

        [Service]
        Type=oneshot
        RemainAfterExit=true
        ExecStart=/usr/bin/timedatectl set-timezone Europe/Amsterdam

        [Install]
        WantedBy=multi-user.target
    - name: "flatcar-metadata.service"
      dropins:
       - name: "use-script.conf"
         contents: |
           [Service]  
           ExecStart=/opt/get-metadata.sh

    - name: rancher.service
      enable: true
      contents: | 
        [Unit]    
        Description=Rancher service for docker management
        After=flatcar-metadata.service

        [Service]
        Type=oneshot
        RemainAfterExit=true
        ExecStart=/opt/get-metadata.sh

        [Install]
        WantedBy=multi-user.target
passwd:
  users:
    - name: 
      ssh_authorized_keys:
        - "ssh-rsa "
````




#### RANCHEROS

PXE SETUP
````
:RancherOs
kernel https://$IP/rancher/v1.5.5/vmlinuz elevator=deadline nomodeset vsyscall=emulate printk.devkmsg=on rancher.state.dev=LABEL=RANCHER_STATE rancher.state.autoformat=[/dev/sda] rancher.state.formatzero=true panic=10 rancher.state.wait rancher.cloud_init.datasources=[url:https://$IP/rancher/${net0/ip}.yml]
initrd https://$IP/rancher/v1.5.5/initrd
boot

:RancherOs-Init
kernel https://$IP/rancher/v1.5.5/vmlinuz panic=10 rancher.cloud_init.datasources=[url:http://$IP/rancher/format.yml]
initrd https://$IP/rancher/v1.5.5/initrd
boot

````

$IP.yml

````
#cloud-config
ssh_authorized_keys: 
  - ssh-rsa 
  - ssh-rsa 
write_files:
  - container: ntp
  - path: /etc/ntp.conf
    permissions: "0644"
    content: |
      driftfile /var/lib/ntp/ntp.drift
      statsdir /var/log/ntpstats/
      statistics loopstats peerstats clockstats
      filegen loopstats file loopstats type day enable
      filegen peerstats file peerstats type day enable
      filegen clockstats file clockstats type day enable
      server ntp0.rug.nl burst iburst prefer   
      server 127.127.1.0
      fudge 127.127.1.0 stratum 10
      restrict 127.0.0.1
      restrict ::1
      enable ntp
      enable kernel  
      multicastclient
rancher:
  ssh:
    port: 8822
  modules:
  - iscsi_tcp
  state:
    autoformat:
    - /dev/sda
  sysctl:
    fs.inotify.max_user_watches: 1048576
    vm.max_map_count: 262144
    net.ipv4.conf.all.forwarding: 1
    vm.swappiness: 0
    vm.panic_on_oom: 0
    vm.overcommit_memory: 1
    kernel.panic: 10
    kernel.panic_on_oops: 1
  services:
    nfs-client:
      image: outstand/nfs-client:latest
      restart: always
      labels:
        - io.rancher.os.remove=false
      volumes:  
        - /mnt/snapshot:/mnt/snapshot:shared
        - io.rancher.os.remove=false
        - io.rancher.os.after=docker
      privileged: true
      net: host
      environment:   
        SERVER: $IP
        SHARE: /home/www/snapshot
        MOUNTPOINT: /mnt/snapshot
        FSTYPE: nfs
        MOUNT_OPTIONS: rsize=1048576,wsize=1048576,timeo=600,retrans=2
    console:
      environment:
        TZ: Europe/Amsterdam
  console: alpine
  services_include:
    open-vm-tools: true
    # open-iscsi: true
  network:
    dns:
      nameservers:
      - 129.125.4.161
      - 129.125.4.162
write_files:
  - path: /etc/motd
    permissions: "0644"
    owner: rancher
    content: |
      PI POWER         
write_files:
  - path: /etc/rc.local
    permissions: "0755"
    owner: root
    content: |
      #!/bin/bash
      # wait for network
      while ! curl -o /dev/null -sf https://hub.docker.com/; do
        echo "wait network up"
      done
      wait-for-docker
      apk update && apk add open-iscsi
      if [ -e /etc/installed ]; then                  
      echo "already installed"
       else
      wget https://$IP/rancher/metadata-script.sh -O /home/rancher/metadata-script.sh
      chmod +x /home/rancher/metadata-script.sh
      exec bash -c /home/rancher/metadata-script.sh 
      touch /etc/installed
      fi


````

#### K3OS

PXE-CONFIG

````
:K3OS-MASTER
kernel https://$IP/k3os/k3os-vmlinuz-amd64 k3os.install.device=/dev/sda k3os.install.power_off=false k3os.mode=install k3os.install.silent=true k3os.install.iso_url=https://$IP/k3os/k3os-amd64.iso k3os.install.config_url=https://$IP/k3os/k3os-master.yml
initrd https://$IP/k3os/k3os-initrd-amd64
boot

:K3OS-SLAVE
kernel https://$IP/k3os/k3os-vmlinuz-amd64 k3os.install.device=/dev/sda k3os.install.power_off=false k3os.mode=install k3os.install.silent=true k3os.install.iso_url=https://$IP/k3os/k3os-amd64.iso k3os.install.config_url=https://$IP/k3os/k3os.yml
initrd https://$IP/k3os/k3os-initrd-amd64
boot

````
k3os-master

````
ssh_authorized_keys:
- ssh-rsa 
- ssh-rsa 
write_files:
- encoding: ""
  content: |-
    #!/bin/bash
    wget -O /tmp/call-rancher.sh https://$IP/k3os/call-rancher.sh
  owner: root
  path: /etc/rc.local
  permissions: '0755'

k3os:
  data_sources:
  modules:
  - kvm
  sysctl:
    kernel.printk: 4 4 1 7
    kernel.kptr_restrict: 1
  labels:
    master: true
  dns_nameservers:
  - 129.125.4.161
  - 129.125.4.162
  password: verysecure
  token: d9349b6c-dd0e-464c-a7e8-0c9213626a38
  k3s_args:
    - server
    - "--cluster-cidr=10.107.0.0/23"
    - "--service-cidr=10.107.1.0/23"
    - "--no-deploy=traefik"

````
k3os-slave

````
ssh_authorized_keys:
- ssh-rsa 
- ssh-rsa 
k3os:
  data_sources:
  modules:
  server_url: https://$MASTER:6443
  sysctl:
    kernel.printk: 4 4 1 7
    kernel.kptr_restrict: 1
  labels:
    slave: true
  dns_nameservers:
  - 129.125.4.161
  - 129.125.4.162
  password: verysecure
  token: d9349b6c-dd0e-464c-a7e8-0c9213626a38
  k3s_args:
  - agent

````