#VM instructions for virt-todolist vm

## virt-builder

virt-builder fedora-39 --size 8G --format qcow2 --update --firstboot-command 'useradd -m -p dog8code test ; chage -d 0 test'

* note user-add did not work correctly, cloud-init would be a better choice for the above

## virt-install w/ cloud-init

virt-install --name todolist-mariadb-1 \
 --memory memory=3072  --cpu host --vcpus 2  --graphics none \
 --os-variant fedora39  --import \
 --disk /var/lib/libvirt/images/Fedora-Cloud-Base-39-1.5.x86_64.qcow2,format=qcow2,bus=virtio \
 --disk size=8  \
 --network type=network,source=default,model=virtio \
 --cloud-init user-data=/var/lib/libvirt/boot/cloud-init/todolist-data

### debug cloud-init

# login 
sudo cloud-init schema --system

* https://cloudinit.readthedocs.io/en/latest/reference/examples.html

## packages

dnf install golang, git, mariadb, mariadb-server, net-tools, python-requests

## mariadb script

sudo dnf install mariadb-server -y
sudo systemctl start mariadb
sudo systemctl enable  mariadb
sudo mysql -uroot -e "CREATE DATABASE todolist; USE todolist; CREATE USER 'test'@'localhost' IDENTIFIED BY 'test';"
sudo mysql -uroot -e "grant all privileges on todolist.* to test@'localhost' identified by 'test'; FLUSH PRIVILEGES; "

## turn off the firewall :)

systemctl stop firewalld

## todolist

git clone https://github.com/weshayutin/todolist-mariadb-go.git

See README.MD
or
go mod tidy
go run todolist.go

## test
cd /home/test/todolist-mariadb-go/test/
python test.py

## browse
open browser to http://$ip:8000

## pic

# Cirros
https://gist.github.com/smurugap/a6c862a76c99331a7f929a14aaa30551
https://github.com/kubevirt/kubevirt/blob/main/examples/vm-cirros.yaml

## cloud-init in vm manifest

      volumes:
        - dataVolume:
            name: fedora-determined-kingfisher
          name: rootdisk
        - cloudInitConfigDrive:
            userData: |-
              #cloud-config
              users: 
                - name: fedora
                  password: ry8p-hokq-hy8t
                  chpasswd: { expire: False }
                - name: test
                  password: dog8code
                  chpasswd: { expire: False }
              packages:
                - mariadb-server
                - unzip
              runcmd:
                - systemctl stop firewalld
                - systemctl disable firewalld
                - systemctl start mariadb
                - systemctl enable mariadb
                - mysql -uroot -e "CREATE DATABASE todolist; USE todolist; CREATE USER 'test'@'localhost' IDENTIFIED BY 'test';"
                - mysql -uroot -e "grant all privileges on todolist.* to test@'localhost' identified by 'test'; FLUSH PRIVILEGES;"
                - pushd /home/test/
                - wget https://github.com/weshayutin/todolist-mariadb-go/releases/download/testing1/todolist-linux-amd64.zip
                - unzip todolist-linux-amd64.zip
                - cp systemd/todolist-mariadb.service /etc/systemd/user
                - popd
                - sudo systemctl --user daemon-reload
                - sudo systemctl --user start todolist-mariadb.service
                - sudo systemctl --user enable todolist-mariadb.service
                - systemctl  disable  cloud-init
          name: cloudinitdisk

## upload small fedora to quay
https://docs.openshift.com/container-platform/4.13/virt/virtual_machines/virtual_disks/virt-using-container-disks-with-vms.html

apiVersion: kubevirt.io/v1
kind: VirtualMachine
metadata:
  name: fedora-xeric-grasshopper
  namespace: openshift-virtualization-os-images
spec:
  dataVolumeTemplates:
    - metadata:
        name: fedora-xeric-grasshopper-volume
      spec:
        sourceRef:
          kind: DataSource
          name: tinyfedora
          namespace: openshift-virtualization-os-images
        storage:
          resources:
            requests:
              storage: '33285996544'
          storageClassName: gp3-csi
  instancetype:
    name: cx1.large
  preference:
    name: fedora
  running: true
  template:
    spec:
      domain:
        devices:
          disks:
            - disk:
                bus: virtio
              name: fedora-xeric-grasshopper-disk
            - disk:
                bus: virtio
              name: cloudinitdisk
      volumes:
        - dataVolume:
            name: fedora-xeric-grasshopper-volume
          name: fedora-xeric-grasshopper-disk
        - cloudInitConfigDrive:
            userData: |-
              #cloud-config
              users: 
                - name: fedora
                  password: dog8code
                  chpasswd: { expire: False }
                - name: test
                  password: dog8code
                  chpasswd: { expire: False }
              packages:
                - mariadb-server
                - unzip
              runcmd:
                - systemctl stop firewalld
                - systemctl disable firewalld
                - systemctl start mariadb
                - systemctl enable mariadb
                - mysql -uroot -e "CREATE DATABASE todolist; USE todolist; CREATE USER 'test'@'localhost' IDENTIFIED BY 'test';"
                - mysql -uroot -e "grant all privileges on todolist.* to test@'localhost' identified by 'test'; FLUSH PRIVILEGES;"
                - pushd /home/test/
                - wget https://github.com/weshayutin/todolist-mariadb-go/releases/download/testing1/todolist-linux-amd64.zip
                - unzip todolist-linux-amd64.zip
                - cp systemd/todolist-mariadb.service /etc/systemd/user
                - popd
                - sudo systemctl --user daemon-reload
                - sudo systemctl --user start todolist-mariadb.service
                - sudo systemctl --user enable todolist-mariadb.service
                - systemctl  disable  cloud-init

## openshift-virt template has a different yaml format

          name: rootdisk
        - cloudInitConfigDrive:
            userData: |-
              #cloud-config
              user: fedora
              password: dog8code
              chpasswd: { expire: False }
          name: cloudinitdisk

## WORKING COPY
https://github.com/openshift/oadp-operator/pull/1363

## OpenShift-Virt software emulation
https://developers.redhat.com/blog/2020/09/17/how-to-switch-red-hat-openshift-virtualization-from-hardware-virtualization-to-software-emulation#step_3__start_the_virtual_machine_using_software_emulation