Added instructions on how to debug Galaxy backed by a Slurm cluster

2026-09-24 16:30:27 +08:00 · 2021-09-02 16:10:41 -04:00
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+# Debugging Galaxy: Slurm Compute Cluster
+
+This document explains how to debug a Galaxy instance that uses a Slurm compute cluster (not the
+default LocalRunner). If you have a MacOS machine, you need to create a Linux VM using Oracle's 
+VirtualBoxVM and run the instructions in the VM. For reference, I created a 64-bit Linux VM with 
+4096 MB of RAM and 32 GB of disk space (all other parameters were left as default) and managed to 
+successfully run the instructions. If using a Linux VM, you may need to install Git, Python, VSCode, 
+and Docker (if using Irods storage). Finally, These instructions are intended for developers who 
+want to debug their Galaxy instance and are not meant for deployment purposes (We have nice Ansible 
+playbooks for that).
+
+## Debugging Galaxy in VS Code 
+
+1. Install libslurm-dev
+    * `sudo apt install libslurm-dev`
+    * On my VM, the above command puts `slurm/slurm.h` in `/usr/include` and `libslurm.a` in `/usr/lib/x86_64-linux-gnu`
+    * You need these header and library files to compile slurm-drmaa in the next step
+
+2. Install slurm-drmaa
+    * Download slurm-drmaa tar file from `https://github.com/natefoo/slurm-drmaa/releases/download/1.1.2/slurm-drmaa-1.1.2.tar.gz`
+    * Extract the downloaded tar file into home directory: `tar -xzvf slurm-drmaa-1.1.2.tar.gz -C ~`       
+    * To compile and install slurm-drmaa
+        * `cd ~/slurm-drmaa-1.1.2`
+        * `./configure --with-slurm-inc=/usr/include --with-slurm-lib=/usr/lib/x86_64-linux-gpu`
+        * `sudo make install`
+        * On my VM, the above command puts `libdrmaa.so` in `/usr/local/lib`. You need the path to this file in the next step
+
+3. Replace the contents of `~/galaxy/config/job_conf.xml` with the following code snippet (create the file if it does not already exist)
+    ```
+    <?xml version="1.0"?>
+    <job_conf>
+        <plugins workers="3">
+            <plugin id="slurm" type="runner" load="galaxy.jobs.runners.slurm:SlurmJobRunner">
+                <param id="drmaa_library_path">/usr/local/lib/libdrmaa.so</param>
+            </plugin>
+        </plugins>
+        <destinations default="slurm">
+            <destination id="slurm" runner="slurm"/>
+        </destinations>
+        <resources default="default">
+          <group id="default"></group>
+          <group id="memoryonly">memory</group>
+          <group id="all">processors,memory,time,project</group>
+        </resources>
+    </job_conf>
+    ```
+
+4. Install Slurm (Instructions borrowed from `https://gist.github.com/ckandoth/2acef6310041244a690e4c08d2610423`)
+    * Install the necessary packages: `sudo apt install -y slurm-wlm slurm-wlm-doc`
+    * Load `/usr/share/doc/slurm-wlm/html/configurator.html` in a browser
+        * Set your VM's hostname in `SlurmctldHost` and `NodeName`
+        * Set `StateSaveLocation` to `/var/spool/slurmctld`
+        * Set `SlurmdSpoolDir` to `/var/spool/slurmd`
+        * Set `ProctrackType` to `LinuxProc`
+        * Set `SelectType` to `Cons_res` 
+        * Set `SelectTypeParameters` to `CR_Core_Memory` 
+        * Set `JobAcctGatherType` to `Linux`
+        * Hit `Submit` and save the resulting text into `/etc/slurm-llnl/slurm.conf`
+            * I.e., the configuration file referred to in `/lib/systemd/system/slurmctld.service` and `/lib/systemd/system/slurmd.service`
+    * Create `/var/spool/slurmd` and `/var/spool/slurmctld` and `/var/log/slurm_jobacct.log` file and set ownership appropriately
+        * `sudo mkdir -p /var/spool/slurmd`
+        * `sudo mkdir -p /var/spool/slurmctld`
+        * `sudo touch /var/log/slurm_jobacct.log`
+        * `sudo chown slurm:slurm /var/spool/slurmd /var/spool/slurmctld /var/log/slurm_jobacct.log`
+    * Install mailutils so that Slurm won't complain about `/bin/mail` missing
+        * `sudo apt install -y mailutils`
+    * Make sure munge is installed/running, and a munge.key was created with user-only read-only permissions, owned by munge:munge
+        * `sudo apt install munge`
+        * `sudo service munge start`
+        * `sudo ls -l /etc/munge/munge.key`
+    * Start slurmd and slurmctld services
+        * `sudo service slurmd start`
+        * `sudo service slurmctld start`
+
+5. Follow the instructions [here](./debuging_galaxy.md) to setup VSCode for debugging. 
+
+Enjoy debugging session your Galaxy instance backed by a Slurm cluster!