| Singularity is a container platform based on the principle of mobility of |
| compute, and it is designed for use within HPC clusters. For more info see |
| singularity.lbl.gov. |
| |
| To test whether the software functions correctly, you can use `singularity |
| selftest`. This is what you would expect to see: |
| |
| ~# singularity selftest |
| + sh -c test -f /etc/singularity/singularity.conf (retval=0) OK |
| + test -u /usr/libexec/singularity/bin/action-suid (retval=0) OK |
| + test -u /usr/libexec/singularity/bin/create-suid (retval=0) OK |
| + test -u /usr/libexec/singularity/bin/expand-suid (retval=0) OK |
| + test -u /usr/libexec/singularity/bin/export-suid (retval=0) OK |
| + test -u /usr/libexec/singularity/bin/import-suid (retval=0) OK |
| + test -u /usr/libexec/singularity/bin/mount-suid (retval=0) OK |
| |
| You can also pull a container from Docker Hub to prove full functionality |
| (Test was performed on a Raspberry Pi 3, hence the arm32v7 part of the Docker |
| link. Make sure you pull an image which is compatible with your hardware.) |
| For instance: |
| |
| ~# singularity pull docker://arm32v7/debian:latest |
| Initializing Singularity image subsystem |
| Opening image file: debian-latest.img |
| Creating 200MiB image |
| Binding image to loop |
| Creating file system within image |
| Image is done: debian-latest.img |
| Docker image path: index.docker.io/arm32v7/debian:latest |
| Cache folder set to /home/root/.singularity/docker |
| [1/1] |===================================| 100.0% |
| Importing: base Singularity environment |
| Importing: /home/root/.singularity/docker/sha256:ed4f1f0d0a0457e7f76ffb25a8d6a193007709dd312b7647cb44fc6979ec4a53.tar.gz |
| Importing: /home/root/.singularity/metadata/sha256:89997b2c16b29c5a3a316e314172ef21b36f67cc3200b1c4d95927f716dbee83.tar.gz |
| Done. Container is at: debian-latest.img |
| ~# singularity shell debian-latest.img |
| Singularity: Invoking an interactive shell within container... |
| |
| Singularity debian-latest.img:~> echo "Hello from within the container!" |
| Hello from within the container! |
| Singularity debian-latest.img:~> ls / |
| bin dev home lost+found mnt proc run singularity sys usr |
| boot etc lib media opt root sbin srv tmp var |
| Singularity debian-latest.img:~> exit |
| exit |
| ~# |