Differenze

Queste sono le differenze tra la revisione selezionata e la versione attuale della pagina.

--- oph:cluster:apptainer [2023/12/18 13:48] – [Graphical applications with ssh X forwarding] diego.zuccato@unibo.it
+++ oph:cluster:apptainer [2024/11/28 09:25] (versione attuale) – Rimosse istruzioni troppo vecchie diego.zuccato@unibo.it
@@ Linea 8: / Linea 8: @@
 ===== Examples =====
-=== Python Container ===
+<WRAP center round alert 60%>
-By Amalie Louise Stokholm
+Page is being worked on for updated instructions.
+</WRAP>
-  apptainer build --sandbox rockylinux8/ docker://rockylinux:8
-  find rockylinux8 -type d -not -writable -exec chmod +w {} +
-  apptainer run -f --writable rockylinux8/ yum groupinstall -y "Development Tools"
-  apptainer run -f --writable rockylinux8/ yum install -y zlib-devel libffi-devel openssl-devel bzip2-devel readline-devel sqlite-devel xz-devel
-  mv .pyenv/versions/3.9.12{,_old4}
-  apptainer run rockylinux8/ ~/.pyenv/bin/pyenv install 3.9.12
-  .pyenv/versions/3.9.12/bin/python3 -c 'import ctypes'
-=== Graphical applications with ssh X forwarding ===
-By Vsevolod Chestnov
-How to setup `X11` forwarding on `compute_node` via `apptainer`
-  - Create a file `config` with the following content:<code>
-Bootstrap: docker
-From: ubuntu:16.04
-%post
-    apt-get update -y
-    apt-get install -y openssh-server
-    # some tools, remove if not needed
-    apt-get install -y vim firefox
-%startscript
-    echo 'root:12345' | chpasswd
-    sed -i 's/Port.*/Port 12121/'                                      /etc/ssh/sshd_config
-    sed -i 's/PermitRootLogin prohibit-password/PermitRootLogin yes/'  /etc/ssh/sshd_config
-    sed -i 's/UsePrivilegeSeparation yes/UsePrivilegeSeparation no/'   /etc/ssh/sshd_config
-    sed -i 's/#PasswordAuthentication yes/PasswordAuthentication yes/' /etc/ssh/sshd_config
-    mkdir /var/run/sshd
-    chmod 700 /var/run/sshd
-    # /usr/sbin/sshd</code>
-  - Then build the container, here we call it `ubuntu16`<code>
-apptainer build --sandbox --force ubuntu16 config</code>
-  - Next go to the `compute_node` (say `mtx27` -- you need to have an active reservation)<code>
-ssh compute_node</code>
-  - Create an instance of the `ubuntu16` container and call it `test`<code>
-apptainer instance start -f -w ubuntu16 test</code>
-  - Jump into the `test` instance<code>
-apptainer shell instance://test</code>
-  - Once inside, run the `sshd` daemon<code>
-/usr/sbin/sshd</code> which will listen to the `Port 12121`, as prescribed by the file `config` file above.
-  - In a new shell to test things connect to the running instance use `root` as the username<code>
-ssh -X -p 12121 root@localhost</code> after which you'll be prompted for `root`'s password, which was set to `12345` in the `config` file above. Now you may run some GUI application, for example:<code>
-firefox</code>At this stage `X11` forwarding will allow the application to use your machine's display to show the GUI.
-  - To connect from the outside one possibility is to setup port forwarding from `2010` on your machine to `12121` on the `compute_node` (where the instance is running) via the frontend node:<code>
-ssh -L2010:compute_node_id:12121 your_unibo_username@137.204.50.177</code>
-  - And then access via<code>
-ssh -X -p 2010 root@localhost</code>from your machine
-  - Done! Now you may run GUI applications on `compute_node` (like `firefox` and `Mathematica` frontend) and their graphical output will be forwarded to your machine's display.