# Multicast ## Steps * Step 1: Manually Clone a machine in the lab this will act as the server in the multicast * Step 1.1: dd the mbr to /tmp/mbr.bin ``` dd if=/dev/sda of=/tmp/mbr.bin bs=512 count=1 ``` * Step 2: Netboot the entire lab * Step 3: Connect to **steamboat.engr.unr.edu** using you netid * Step 4: On **steamboat** use ansible to connect to all of them ``` cd /srv/ansible/ source python_env/bin/activate ansible -i /etc/hosts -m shell -a "hostname" ``` IMPORTANT: Check that all the hosts you want clone responded and no others. * Step 5: using ansible run subscriber script ``` nohup sh udp-receiver-sda.sh & ``` * Step 6: Run the sender script on the machine acting as the server and hit key to start sending ``` sh udp-sender-sda.sh ``` * Step 7: Hit key on server to start sending data

# Multicast ## Steps Step 1: **Manually** [[ https://ph.engr.unr.edu/w/ecc/cloning/ | clone ]] a machine in the lab. This will act as the master. Step 2: Netboot the entire lab Step 3: Connect to **steamboat.engr.unr.edu** using your netid ```lang=bash # ssh netID@steamboat.engr.unr.edu $ ssh igrant@steamboat.engr.unr.edu ``` Step 4: On **steamboat**, source into your environment to use ansible. ``` $ source /srv/ansible/python_env/bin/activate ``` IMPORTANT: Check that all the hosts you want to clone have responded and no others. Step 5: To check all hosts, run `ansible -i /etc/ansible/hosts -m "shell" -a "hostname" LAB_LETTER `. ```lang=bash # ansible -i /etc/ansible/hosts -m "shell" -a "hostname" lab_letter $ ansible -i /etc/ansible/hosts -m "shell" -a "hostname" lab_d ``` --- IMPORTANT: If you would like to build a custom hosts file, for example targeting only some hosts in a lab, netboot the hosts you would like to target, then use nmap to scan the desired subnet to get the IPs of the corresponding target machines. ```lang=bash nmap -p 22 172.20.195.0/24 -oN output.txt ``` Then you can grab the IPs by grepping the output of the nmap scan for machines with ssh open. ```lang=bash grep -B 3 "22/tcp open" output.txt | awk '{print $5} | grep "[0-9]\{1,3\}\.[0-9]\{1,3\}\.'" > newHosts.txt ``` Edit the **newHosts.txt** file such that it resembles this sample. ```lang=bash [<label>] LIST_OF_IPS [<label>:vars] ansible_ssh_private_key_file=/srv/ansible/.ssh/coen-ansible ``` Once this is complete you can now target your newHosts.txt when specifying the path for the **-i** flag. --- Step 6: On your steamboat connecting while using ansible, run the subscriber script `nohup sh /netboot/images/multi/udp-receiver-sda.sh &` ```lang=bash # ansible -i /etc/ansible/hosts -m "shell" -a "nohup sh /netboot/images/multicast/udp-receiver-sda.sh &" lab_x $ ansible -i /etc/ansible/hosts -m "shell" -a "nohup sh /netboot/images/multicast/udp-receiver-sda.sh &" lab_c ``` Step 7: Run the sender script on the master and hit key to start sending the script is located in `/netboot/images/multicast` ``` $ cd /netboot/images/multicast **Run this in /tmp or anywhere else that's not in the root directory since / is read-only. $ ./udp-sender-sda.sh ``` Step 8: Hit the `ANY` key on server to start sending data. Step 9: Be sure to go around and join the computers to the domain and activate labview. --- (NOTE) Have the **[[ https://ecc-pxe.engr.unr.edu:8443/ipxe/dashboard | dashboard ]]** up to check your progress along the way. Step 9: When you're done, be sure to rename the machine, join to the domain, and activate labview by connecting to tinkerbell using the identity file. ```lang=bash # make sure that you are still on steamboat $ sudo ssh root@tinkerbell.engr.unr.edu -i /srv/ansible/.ssh/coen-ansible ``` Step 10: Source into the IMM Environment ```lang=bash $ source /opt/imm-env/bin/activate ``` Step 11: Head over to `/opt/imm` ```lang=bash $ cd /opt/imm ``` Step 12: Here, you should see the `winrm_tasks.py` file. Below is a list of tasks that you can run: ```lang=bash # /opt/imm/tasks check_status check_status_ip hostnames change_hostname reboot domain_join activate_labview default_printer printer shutdown ``` Rather than going around and joining everything to the domain manually, you can run some winrm scripts to do the job. To execute, type `./winrm_tasks.py --filter ECC-LAB- TASKS`. ```lang=bash # ./winrm_tasks.py --filter ecc-lab- task $ ./winrm_tasks.py --filter ecc-a- check_status ``` IMPORTANT: If the entire lab had just been cloned, run the tasks below in the same order. Also, before completing the printer tasks, edit the file by typing `nano /tasks/printer.py` and change the default printer to the respective lab. ```lang=bash check_status change_hostname hostnames domain_join activate_labview printer check_status ```

# Multicast ## Steps Step 1: **Manually** [[ https://ph.engr.unr.edu/w/ecc/cloning/ | clone ]] a machine in the lab. This will act as the master. Step 2: Netboot the entire lab Step 3: Connect to **steamboat.engr.unr.edu** using your netid ```lang=bash # ssh netID@steamboat.engr.unr.edu $ ssh igrant@steamboat.engr.unr.edu ``` Step 4: On **steamboat**, source into your environment to use ansible. ``` $ source /srv/ansible/python_env/bin/activate ``` IMPORTANT: Check that all the hosts you want to clone have responded and no others. * Step 1: Manually Clone a machine in the lab this will act as the server in the multicast5: To check all hosts, run `ansible -i /etc/ansible/hosts -m "shell" -a "hostname" LAB_LETTER `. ```lang=bash * Step 1.1: dd the mbr to /tmp/mbr.bin# ansible -i /etc/ansible/hosts -m "shell" -a "hostname" lab_letter $ ansible -i /etc/ansible/hosts -m "shell" -a "hostname" lab_d ``` --- IMPORTANT: If you would like to build a custom hosts file, for example targeting only some hosts in a lab, netboot the hosts you would like to target, then use nmap to scan the desired subnet to get the IPs of the corresponding target machines. ```lang=bash nmap -p 22 172.20.195.0/24 -oN output.txt ``` Then you can grab the IPs by grepping the output of the nmap scan for machines with ssh open. ```lang=bash dd if=/dev/sda of=/tmp/mbr.bin bs=512 count=1grep -B 3 "22/tcp open" output.txt | awk '{print $5} | grep "[0-9]\{1,3\}\.[0-9]\{1,3\}\.'" > newHosts.txt ``` Edit the **newHosts.txt** file such that it resembles this sample. ```lang=bash * Step 2: Netboot the entire lab[<label>] * Step 3: Connect to **steamboat.engr.unr.edu** using you netidLIST_OF_IPS [<label>:vars] * Step 4: On **steamboat** use ansible_ssh_private_key_file=/srv/ansible to connect to all of them/.ssh/coen-ansible ``` Once this is complete you can now target your newHosts.txt when specifying the path for the **-i** flag. --- Step 6: On your steamboat connecting while using ansible, run the subscriber script `nohup sh /netboot/images/multi/udp-receiver-sda.sh &` cd /srv/ansible/```lang=bash source python_env/bin/activate# ansible -i /etc/ansible/hosts -m "shell" -a "nohup sh /netboot/images/multicast/udp-receiver-sda.sh &" lab_x $ ansible -i /etc/ansible/hosts -m "shell" -a "hostname"nohup sh /netboot/images/multicast/udp-receiver-sda.sh &" lab_c ``` IMPORTANT: Check that all the hosts you want clone responded and no others. * Step 5: using ansible run subscriber scriptStep 7: Run the sender script on the master and hit key to start sending the script is located in `/netboot/images/multicast` ``` $ cd /netboot/images/multicast **Run this in /tmp or anywhere else that's not in the root directory since / is read-only. $ ./udp-sender-sda.sh ``` Step 8: Hit the `ANY` key on server to start sending data. Step 9: Be sure to go around and join the computers to the domain and activate labview. --- (NOTE) Have the **[[ https://ecc-pxe.engr.unr.edu:8443/ipxe/dashboard | dashboard ]]** up to check your progress along the way. Step 9: When you're done, be sure to rename the machine, join to the domain, and activate labview by connecting to tinkerbell using the identity file. ```lang=bash # make sure that you are still on steamboat $ sudo ssh root@tinkerbell.engr.unr.edu -i /srv/ansible/.ssh/coen-ansible ``` Step 10: Source into the IMM Environment ```lang=bash $ source /opt/imm-env/bin/activate ``` nohup sh udp-receiver-sda.sh &Step 11: Head over to `/opt/imm` ```lang=bash $ cd /opt/imm ``` * Step 6: Run the sender script on the machine acting as the server and hit key12: Here, you should see the `winrm_tasks.py` file. Below is a list of tasks that you can run: to start sending```lang=bash # /opt/imm/tasks check_status check_status_ip hostnames change_hostname reboot domain_join activate_labview default_printer printer shutdown ``` sh udp-sender-sda.shRather than going around and joining everything to the domain manually, you can run some winrm scripts to do the job. To execute, type `./winrm_tasks.py --filter ECC-LAB- TASKS`. ```lang=bash # ./winrm_tasks.py --filter ecc-lab- task $ ./winrm_tasks.py --filter ecc-a- check_status ``` IMPORTANT: If the entire lab had just been cloned, run the tasks below in the same order. Also, before completing the printer tasks, edit the file by typing `nano /tasks/printer.py` and change the default printer to the respective lab. ```lang=bash check_status * Step 7: Hit key on server to start sending datachange_hostname hostnames domain_join activate_labview printer check_status ```