1singularity(1) singularity(1)
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6 singularity-build - Build a Singularity image
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11 singularity build [local options...]
12
16 IMAGE PATH:
17 When Singularity builds the container, output can be one of a few for‐
20 mats:
21 default: The compressed Singularity read only image format (default)
24 sandbox: This is a read-write container within a directory structure
25 note: It is a common workflow to use the "sandbox" mode for development
29 of the
30 container, and then build it as a default Singularity image for pro‐
31 duction
32 use. The default format is immutable.
33 BUILD SPEC:
36 The build spec target is a definition (def) file, local image, or URI
39 that can
40 be used to create a Singularity container. Several different local
41 target
42 formats exist:
43 def file : This is a recipe for building a container (examples below)
46 directory: A directory structure containing a (ch)root file system
47 image: A local image on your machine (will convert to sif if
48 it is legacy format)
49 Targets can also be remote and defined by a URI of the following for‐
53 mats:
54 library:// an image library (default https://cloud.sylabs.io/library)
57 docker:// a Docker/OCI registry (default Docker Hub)
58 shub:// a Singularity registry (default Singularity Hub)
59 oras:// an OCI registry that holds SIF files using ORAS
60
65 --arch="amd64" architecture for remote build
66 --builder="" remote Build Service URL, setting this implies --re‐
69 mote
70 -d, --detached[=false] submit build job and print build ID (no
73 real-time logs and requires --remote)
74 --disable-cache[=false] do not use cache or create cache
77 --docker-login[=false] login to a Docker Repository interactively
80 -e, --encrypt[=false] build an image with an encrypted file system
83 -f, --fakeroot[=false] build using user namespace to fake root
86 user (requires a privileged installation)
87 --fix-perms[=false] ensure owner has rwX permissions on all con‐
90 tainer content for oci/docker sources
91 -F, --force[=false] overwrite an image file if it exists
94 -h, --help[=false] help for build
97 --json[=false] interpret build definition as JSON
100 --library="" container Library URL
103 --no-cleanup[=false] do NOT clean up bundle after failed build,
106 can be helpful for debugging
107 --nohttps[=false] do NOT use HTTPS with the docker:// transport
110 (useful for local docker registries without a certificate)
111 -T, --notest[=false] build without running tests in %test section
114 --passphrase[=false] prompt for an encryption passphrase
117 --pem-path="" enter an path to a PEM formated RSA key for an en‐
120 crypted container
121 -r, --remote[=false] build image remotely (does not require root)
124 -s, --sandbox[=false] build image as sandbox format (chroot direc‐
127 tory structure)
128 --section=[all] only run specific section(s) of deffile (setup,
131 post, files, environment, test, labels, none)
132 -u, --update[=false] run definition over existing container (skips
135 header)
136
140 DEF FILE BASE OS:
141 Library:
143 Bootstrap: library
144 From: debian:9
145 Docker:
147 Bootstrap: docker
148 From: tensorflow/tensorflow:latest
149 IncludeCmd: yes # Use the CMD as runscript instead of ENTRYPOINT
150 Singularity Hub:
152 Bootstrap: shub
153 From: singularityhub/centos
154 YUM/RHEL:
156 Bootstrap: yum
157 OSVersion: 7
158 MirrorURL: http://mirror.centos.org/centos-%{OSVERSION}/%{OSVERSION}/os/x86_64/
159 Include: yum
160 Debian/Ubuntu:
162 Bootstrap: debootstrap
163 OSVersion: trusty
164 MirrorURL: http://us.archive.ubuntu.com/ubuntu/
165 Local Image:
167 Bootstrap: localimage
168 From: /home/dave/starter.img
169 Scratch:
171 Bootstrap: scratch # Populate the container with a minimal rootfs in %setup
172 DEFFILE SECTIONS:
174 %pre
176 echo "This is a scriptlet that will be executed on the host, as root before"
177 echo "the container has been bootstrapped. This section is not commonly used."
178 %setup
180 echo "This is a scriptlet that will be executed on the host, as root, after"
181 echo "the container has been bootstrapped. To install things into the container"
182 echo "reference the file system location with $SINGULARITY_ROOTFS."
183 %post
185 echo "This scriptlet section will be executed from within the container after"
186 echo "the bootstrap/base has been created and setup."
187 %test
189 echo "Define any test commands that should be executed after container has been"
190 echo "built. This scriptlet will be executed from within the running container"
191 echo "as the root user. Pay attention to the exit/return value of this scriptlet"
192 echo "as any non-zero exit code will be assumed as failure."
193 exit 0
194 %runscript
196 echo "Define actions for the container to be executed with the run command or"
197 echo "when container is executed."
198 %startscript
200 echo "Define actions for container to perform when started as an instance."
201 %labels
203 HELLO MOTO
204 KEY VALUE
205 %files
207 /path/on/host/file.txt /path/on/container/file.txt
208 relative_file.txt /path/on/container/relative_file.txt
209 %environment
211 LUKE=goodguy
212 VADER=badguy
213 HAN=someguy
214 export HAN VADER LUKE
215 %help
217 This is a text file to be displayed with the run-help command.
218 COMMANDS:
220 Build a sif file from a Singularity recipe file:
222 $ singularity build /tmp/debian0.sif /path/to/debian.def
223 Build a sif image from the Library:
225 $ singularity build /tmp/debian1.sif library://debian:latest
226 Build a base sandbox from DockerHub, make changes to it, then build sif
228 $ singularity build --sandbox /tmp/debian docker://debian:latest
229 $ singularity exec --writable /tmp/debian apt-get install python
230 $ singularity build /tmp/debian2.sif /tmp/debian
231
236 singularity(1)
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241 26-May-2021 Auto generated by spf13/cobra
242Auto generated by spf13/cobra May 2021 singularity(1)