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Diffstat (limited to 'docs/source/markdown/podman-build.1.md')
| -rw-r--r-- | docs/source/markdown/podman-build.1.md | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/docs/source/markdown/podman-build.1.md b/docs/source/markdown/podman-build.1.md index a07b55924..6618df1b9 100644 --- a/docs/source/markdown/podman-build.1.md +++ b/docs/source/markdown/podman-build.1.md @@ -351,6 +351,15 @@ another process. Do not use existing cached images for the container build. Build from the start with a new set of cached layers. +**--omit-timestamp** *bool-value* + +Set the create timestamp to epoch 0 to allow for deterministic builds (defaults to false). +By default, the created timestamp is changed and written into the image manifest with every commit, +causing the image's sha256 hash to be different even if the sources are exactly the same otherwise. +When --omit-timestamp is set to true, the created timestamp is always set to the epoch and therefore not +changed, allowing the image's sha256 to remain the same. All files committed to the layers of the image +will get the epoch 0 timestamp. + **--os**=*string* Set the OS to the provided value instead of the current operating system of the host. @@ -736,6 +745,52 @@ $ podman build -f dev/Containerfile https://10.10.10.1/podman/context.tar.gz ## Files +### `.dockerignore` + +If the file .dockerignore exists in the context directory, `podman build` reads +its contents. Podman uses the content to exclude files and directories from +the context directory, when executing COPY and ADD directives in the +Containerfile/Dockerfile + +Users can specify a series of Unix shell globals in a .dockerignore file to +identify files/directories to exclude. + +Podman supports a special wildcard string `**` which matches any number of +directories (including zero). For example, **/*.go will exclude all files that +end with .go that are found in all directories. + +Example .dockerignore file: + +``` +# exclude this content for image +*/*.c +**/output* +src +``` + +`*/*.c` +Excludes files and directories whose names ends with .c in any top level subdirectory. For example, the source file include/rootless.c. + +`**/output*` +Excludes files and directories starting with `output` from any directory. + +`src` +Excludes files named src and the directory src as well as any content in it. + +Lines starting with ! (exclamation mark) can be used to make exceptions to +exclusions. The following is an example .dockerignore file that uses this +mechanism: +``` +*.doc +!Help.doc +``` + +Exclude all doc files except Help.doc from the image. + +This functionality is compatible with the handling of .dockerignore files described here: + +https://docs.docker.com/engine/reference/builder/#dockerignore-file + **registries.conf** (`/etc/containers/registries.conf`) registries.conf is the configuration file which specifies which container registries should be consulted when completing image names which do not include a registry or domain portion. @@ -752,6 +807,8 @@ If you are using `useradd` within your build script, you should pass the `--no-l podman(1), buildah(1), containers-registries.conf(5), crun(8), runc(8), useradd(8) ## HISTORY +Aug 2020, Additional options and .dockerignore added by Dan Walsh <dwalsh@redhat.com> + May 2018, Minor revisions added by Joe Doss <joe@solidadmin.com> December 2017, Originally compiled by Tom Sweeney <tsweeney@redhat.com> |