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Singularity: Difference between revisions
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Should you need to run daemons and backgrounded processes within your container, then do | Should you need to run daemons and backgrounded processes within your container, then do <b>not</b> use the Singularity <code>exec</code> command! | ||
Instead you want to use Singularity's | Instead you want to use Singularity's <code>instance.start</code> and <code>instance.stop</code> commands to create and destroy sessions (i.e., container instances). | ||
By using sessions, Singularity will ensure that all programs running within the instance are terminated when your job ends, unexpectedly dies, is killed, etc. | By using sessions, Singularity will ensure that all programs running within the instance are terminated when your job ends, unexpectedly dies, is killed, etc. | ||
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To start a Singularity session instance, decide on a name for this session, e.g., <code>quadrat5run</code>, and run the | To start a Singularity session instance, decide on a name for this session, e.g., <code>quadrat5run</code>, and run the <code>instance.start</code> command | ||
specifying the image name, e.g., <code>myimage.simg</code>, and your session name: | specifying the image name, e.g., <code>myimage.simg</code>, and your session name: | ||
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A session (and all associated programs that are running) can be stopped (i.e., destroyed/killed) by running the | A session (and all associated programs that are running) can be stopped (i.e., destroyed/killed) by running the <code>instance.stop</code> command, e.g., | ||
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With a session started, programs can be run using Singularity's <code>shell</code>, <code>exec</code>, or <code>run</code> commands by specifying | With a session started, programs can be run using Singularity's <code>shell</code>, <code>exec</code>, or <code>run</code> commands by specifying | ||
the name of the session immediately after the image name prefixed with | the name of the session immediately after the image name prefixed with <code>instance://</code>, e.g., | ||
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