| Brad Bishop | d7bf8c1 | 2018-02-25 22:55:05 -0500 | [diff] [blame^] | 1 | Singularity is a container platform based on the principle of mobility of |
| 2 | compute, and it is designed for use within HPC clusters. For more info see |
| 3 | singularity.lbl.gov. |
| 4 | |
| 5 | To test whether the software functions correctly, you can use `singularity |
| 6 | selftest`. This is what you would expect to see: |
| 7 | |
| 8 | ~# singularity selftest |
| 9 | + sh -c test -f /etc/singularity/singularity.conf (retval=0) OK |
| 10 | + test -u /usr/libexec/singularity/bin/action-suid (retval=0) OK |
| 11 | + test -u /usr/libexec/singularity/bin/create-suid (retval=0) OK |
| 12 | + test -u /usr/libexec/singularity/bin/expand-suid (retval=0) OK |
| 13 | + test -u /usr/libexec/singularity/bin/export-suid (retval=0) OK |
| 14 | + test -u /usr/libexec/singularity/bin/import-suid (retval=0) OK |
| 15 | + test -u /usr/libexec/singularity/bin/mount-suid (retval=0) OK |
| 16 | |
| 17 | You can also pull a container from Docker Hub to prove full functionality |
| 18 | (Test was performed on a Raspberry Pi 3, hence the arm32v7 part of the Docker |
| 19 | link. Make sure you pull an image which is compatible with your hardware.) |
| 20 | For instance: |
| 21 | |
| 22 | ~# singularity pull docker://arm32v7/debian:latest |
| 23 | Initializing Singularity image subsystem |
| 24 | Opening image file: debian-latest.img |
| 25 | Creating 200MiB image |
| 26 | Binding image to loop |
| 27 | Creating file system within image |
| 28 | Image is done: debian-latest.img |
| 29 | Docker image path: index.docker.io/arm32v7/debian:latest |
| 30 | Cache folder set to /home/root/.singularity/docker |
| 31 | [1/1] |===================================| 100.0% |
| 32 | Importing: base Singularity environment |
| 33 | Importing: /home/root/.singularity/docker/sha256:ed4f1f0d0a0457e7f76ffb25a8d6a193007709dd312b7647cb44fc6979ec4a53.tar.gz |
| 34 | Importing: /home/root/.singularity/metadata/sha256:89997b2c16b29c5a3a316e314172ef21b36f67cc3200b1c4d95927f716dbee83.tar.gz |
| 35 | Done. Container is at: debian-latest.img |
| 36 | ~# singularity shell debian-latest.img |
| 37 | Singularity: Invoking an interactive shell within container... |
| 38 | |
| 39 | Singularity debian-latest.img:~> echo "Hello from within the container!" |
| 40 | Hello from within the container! |
| 41 | Singularity debian-latest.img:~> ls / |
| 42 | bin dev home lost+found mnt proc run singularity sys usr |
| 43 | boot etc lib media opt root sbin srv tmp var |
| 44 | Singularity debian-latest.img:~> exit |
| 45 | exit |
| 46 | ~# |