1buildah-commit(1) General Commands Manual buildah-commit(1)
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6 buildah-commit - Create an image from a working container.
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10 buildah commit [options] container [image]
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14 Writes a new image using the specified container's read-write layer and
15 if it is based on an image, the layers of that image. If image does
16 not begin with a registry name component, localhost will be added to
17 the name. If image is not provided, the image will have no name. When
18 an image has no name, the buildah images command will display <none> in
19 the REPOSITORY and TAG columns.
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23 The image ID of the image that was created. On error, 1 is returned
24 and errno is returned.
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28 --authfile path
29 Path of the authentication file. Default is ${XDG_\RUNTIME_DIR}/con‐
32 tainers/auth.json. If XDG_RUNTIME_DIR is not set, the default is
33 /run/containers/$UID/auth.json. This file is created using using buil‐
34 dah login.
35 If the authorization state is not found there, $HOME/.docker/con‐
38 fig.json is checked, which is set using docker login.
39 Note: You can also override the default path of the authentication file
42 by setting the REGISTRY_AUTH_FILE environment variable. export REG‐
43 ISTRY_AUTH_FILE=path
44 --cert-dir path
47 Use certificates at path (*.crt, *.cert, *.key) to connect to the reg‐
50 istry. The default certificates directory is /etc/containers/certs.d.
51 --creds creds
54 The [username[:password]] to use to authenticate with the registry if
57 required. If one or both values are not supplied, a command line
58 prompt will appear and the value can be entered. The password is en‐
59 tered without echo.
60 --disable-compression, -D
63 Don't compress filesystem layers when building the image unless it is
66 required by the location where the image is being written. This is the
67 default setting, because image layers are compressed automatically when
68 they are pushed to registries, and images being written to local stor‐
69 age would only need to be decompressed again to be stored. Compression
70 can be forced in all cases by specifying --disable-compression=false.
71 --encryption-key key
74 The [protocol:keyfile] specifies the encryption protocol, which can be
77 JWE (RFC7516), PGP (RFC4880), and PKCS7 (RFC2315) and the key material
78 required for image encryption. For instance, jwe:/path/to/key.pem or
79 pgp:admin@example.com or pkcs7:/path/to/x509-file.
80 --encrypt-layer layer(s)
83 Layer(s) to encrypt: 0-indexed layer indices with support for negative
86 indexing (e.g. 0 is the first layer, -1 is the last layer). If not de‐
87 fined, will encrypt all layers if encryption-key flag is specified.
88 --format, -f [oci | docker]
91 Control the format for the image manifest and configuration data. Rec‐
94 ognized formats include oci (OCI image-spec v1.0, the default) and
95 docker (version 2, using schema format 2 for the manifest).
96 Note: You can also override the default format by setting the BUIL‐
99 DAH_FORMAT environment variable. export BUILDAH\_FORMAT=docker
100 --iidfile ImageIDfile
103 Write the image ID to the file.
106 --manifest "listName"
109 Name of the manifest list to which the built image will be added. Cre‐
112 ates the manifest list if it does not exist. This option is useful for
113 building multi architecture images.
114 --quiet, -q
117 When writing the output image, suppress progress output.
120 --rm Remove the working container and its contents after creating the
123 image. Default leaves the container and its content in place.
124 --sign-by fingerprint
127 Sign the new image using the GPG key that matches the specified finger‐
130 print.
131 --squash
134 Squash all of the new image's layers (including those inherited from a
137 base image) into a single new layer.
138 --timestamp seconds
141 Set the create timestamp to seconds since epoch to allow for determin‐
144 istic builds (defaults to current time). By default, the created time‐
145 stamp is changed and written into the image manifest with every commit,
146 causing the image's sha256 hash to be different even if the sources are
147 exactly the same otherwise. When --timestamp is set, the created time‐
148 stamp is always set to the time specified and therefore not changed,
149 allowing the image's sha256 to remain the same. All files committed to
150 the layers of the image will be created with the timestamp.
151 --tls-verify bool-value
154 Require HTTPS and verification of certificates when talking to con‐
157 tainer registries (defaults to true). TLS verification cannot be used
158 when talking to an insecure registry.
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162 This example saves an image based on the container.
163 buildah commit containerID newImageName
164 This example saves an image named newImageName based on the container.
167 buildah commit --rm containerID newImageName
168 This example saves an image with no name, removes the working con‐
171 tainer, and creates a new container using the image's ID.
172 buildah from $(buildah commit --rm containerID)
173 This example saves an image based on the container disabling compres‐
176 sion.
177 buildah commit --disable-compression containerID
178 This example saves an image named newImageName based on the container
181 disabling compression.
182 buildah commit --disable-compression containerID newImageName
183 This example commits the container to the image on the local registry
186 while turning off tls verification.
187 buildah commit --tls-verify=false containerID docker://local‐
188 host:5000/imageId
189 This example commits the container to the image on the local registry
192 using credentials and certificates for authentication.
193 buildah commit --cert-dir ~/auth --tls-verify=true --creds=user‐
194 name:password containerID docker://localhost:5000/imageId
195 This example commits the container to the image on the local registry
198 using credentials from the /tmp/auths/myauths.json file and certifi‐
199 cates for authentication.
200 buildah commit --authfile /tmp/auths/myauths.json --cert-dir ~/auth
201 --tls-verify=true --creds=username:password containerID docker://local‐
202 host:5000/imageName
203 This example saves an image based on the container, but stores dates
206 based on epoch time. buildah commit --timestamp=0 containerID newIma‐
207 geName
208 Building an multi-architecture image using the --manifest option (requires
211 emulation software)
212 #!/bin/sh
213 build() {
214 ctr=$(./bin/buildah from --arch $1 ubi8)
215 ./bin/buildah run $ctr dnf install -y iputils
216 ./bin/buildah commit --manifest ubi8ping $ctr
217 }
218 build arm
219 build amd64
220 build s390x
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225 BUILD_REGISTRY_SOURCES
226 BUILD_REGISTRY_SOURCES, if set, is treated as a JSON object which con‐
229 tains lists of registry names under the keys insecureRegistries,
230 blockedRegistries, and allowedRegistries.
231 When committing an image, if the image is to be given a name, the por‐
234 tion of the name that corresponds to a registry is compared to the
235 items in the blockedRegistries list, and if it matches any of them, the
236 commit attempt is denied. If there are registries in the allowedReg‐
237 istries list, and the portion of the name that corresponds to the reg‐
238 istry is not in the list, the commit attempt is denied.
239 TMPDIR The TMPDIR environment variable allows the user to specify where
242 temporary files are stored while pulling and pushing images. Defaults
243 to '/var/tmp'.
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247 registries.conf (/etc/containers/registries.conf)
248 registries.conf is the configuration file which specifies which con‐
251 tainer registries should be consulted when completing image names which
252 do not include a registry or domain portion.
253 policy.json (/etc/containers/policy.json)
256 Signature policy file. This defines the trust policy for container im‐
259 ages. Controls which container registries can be used for image, and
260 whether or not the tool should trust the images.
261
264 buildah(1), buildah-images(1), containers-policy.json(5), containers-
265 registries.conf(5)
266buildah March 2017 buildah-commit(1)