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System_Usage.md

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How to work with environment

Configure SSH Access

The following section describes how to include config snippets in the ssh configuration of your local system to simplify access to systems of the vp18 hardware landscape.

  1. User: Clone the repository 
    cd <your-sourcecode-dir>
git clone git@github.com:SovereignCloudStack/hardware-landscape.git
cd hardware-landscape
SCS_ENV_DIR="$(pwd)"
GITHUB_ID="scoopex"
  2. User: Add this snippet to your SSH configuration: 
    cat >> ~/.ssh/config <<EOF
Include ${SCS_ENV_DIR:?}/config-snippets/ssh_config_scs_servers
Include ${SCS_ENV_DIR:?}/config-snippets/ssh_config_scs_switches
Include ${SCS_ENV_DIR:?}/config-snippets/ssh_config_scs_general

Host scs-* !scs-manager !scs-manager1 !scs-manager2
   ProxyJump scs-manager
   # Your github id, use "osism" or "dragon" when your are in the
   # installation process
   User ${GITHUB_ID:?}

Host scs-manager scs-manager1 scs-manager2
   # Your github id, use "osism" or "dragon" when your are in the
   # installation process
   User ${GITHUB_ID:?}

EOF
  3. Optional, Admin: Update the SSH configuration (this fetches host information from the documentation in documentation/devices and creates new ssh config snippets) 
    cd ${SCS_ENV_DIR:?}
git pull
./switch_ctl -c all
./server_ctl -c all
  4. User: Login to manager 
    ssh scs-manager
  5. User: Login to systems directly from your workstation 
    ssh scs-<TAB><TAB>

Serial Switch Console Access

  • Login to first manager

    ssh scs-ömanager

  • Attach to a running screen session which provides access to the ttypS0..ttySX interfaces or create automatically a new one

    scs_serial_access

  • Restart all sessions

    1. Attach to running session 
      scs_serial_access
    2. Terminate sessions by STRG+y :quit
    3. Restart terminals 
      scs_serial_access

  • Review console output see /var/log/screen

  • Screen Usage :

    • 'CTLR + y d' leave the session
    • 'CTLR + y, "' select your terminal
    • 'CTLR + y, :quit' terminate screen entirely
    • 'CTLR + y, :break' send a break signal
      • Use the screen command press 'STRG+y' send a break signal: ':break'
      • Hit the sysrq char "b" multiple times
      • Watch the hardware booting :-)

Miscellanious Procedures

Update ansible inventory data

The following section describes how to regenerate inventory files based on the documentation in documentation/devices.

  • Enter configuration directory and verify that there are no open changes 
    cd <your-sourcecode-dir>/hardware-landscape
git stash
git checkout -b "update-inventory-files"
  • Regenerate inventory files 
    ./server_ctl --ansible all
./switch_ctl --ansible all
  • Check changes 
    git diff
  • Merge changes 
    git commit ...
git push
...

Simple connection to the datacenter

Execute the following command to have access to lab networks:

sshuttle -r scs-manager 10.10.23.0/24 10.10.22.0/24 10.10.21.0/24