1OC IMAGE(1) June 2016 OC IMAGE(1)
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6 oc image extract - Copy files from an image to the filesystem
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11 oc image extract [OPTIONS]
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16 Extract the contents of an image to disk
17 Download an image or parts of an image to the filesystem. Allows users
20 to access the contents of images without requiring a container runtime
21 engine running.
22 Pass images to extract as arguments. The --paths flag allows you to
25 define multiple source to destination directory mappings. The source
26 section may be either a file, a directory (ends with a '/'), or a file
27 pattern within a directory. The destination section is a directory to
28 extract to. Both source and destination must be specified.
29 If the specified image supports multiple operating systems, the image
32 that matches the current operating system will be chosen. Otherwise you
33 must pass --filter-by-os to select the desired image.
34 You may further qualify the image by adding a layer selector to the end
37 of the image string to only extract specific layers within an image.
38 The supported selectors are:
39 [ <index>] - select the layer at the provided index (zero-indexed) [
42 <from_index>, <to_index>] - select layers by index, exclusive [ <pre‐
43 fix>] - select the layer with the matching prefix or return an error
44 Negative indices are counted from the end of the list, e.g. [-1]
47 selects the last layer.
48 Experimental: This command is under active development and may change
51 without notice.
52
56 --dry-run=false
57 Print the actions that would be taken and exit without writing any
58 contents.
59 --filter-by-os=""
62 A regular expression to control which images are mirrored. Images
63 will be passed as '<platform>/<architecture>[/<variant>]'.
64 --insecure=false
67 Allow pull operations to registries to be made over HTTP
68 --only-files=false
71 Only extract regular files and directories from the image.
72 --path=[/:.]
75 Extract only part of an image. Must be SRC:DST where SRC is the
76 path within the image and DST a local directory. If not specified the
77 default is to extract everything to the current directory.
78
82 --allow_verification_with_non_compliant_keys=false
83 Allow a SignatureVerifier to use keys which are technically
84 non-compliant with RFC6962.
85 --alsologtostderr=false
88 log to standard error as well as files
89 --application_metrics_count_limit=100
92 Max number of application metrics to store (per container)
93 --as=""
96 Username to impersonate for the operation
97 --as-group=[]
100 Group to impersonate for the operation, this flag can be repeated
101 to specify multiple groups.
102 --azure-container-registry-config=""
105 Path to the file containing Azure container registry configuration
106 information.
107 --boot_id_file="/proc/sys/kernel/random/boot_id"
110 Comma-separated list of files to check for boot-id. Use the first
111 one that exists.
112 --cache-dir="/builddir/.kube/http-cache"
115 Default HTTP cache directory
116 --certificate-authority=""
119 Path to a cert file for the certificate authority
120 --client-certificate=""
123 Path to a client certificate file for TLS
124 --client-key=""
127 Path to a client key file for TLS
128 --cloud-provider-gce-lb-src-cidrs=130.211.0.0/22,209.85.152.0/22,209.85.204.0/22,35.191.0.0/16
131 CIDRs opened in GCE firewall for LB traffic proxy health checks
132 --cluster=""
135 The name of the kubeconfig cluster to use
136 --container_hints="/etc/cadvisor/container_hints.json"
139 location of the container hints file
140 --containerd="unix:///var/run/containerd.sock"
143 containerd endpoint
144 --context=""
147 The name of the kubeconfig context to use
148 --default-not-ready-toleration-seconds=300
151 Indicates the tolerationSeconds of the toleration for
152 notReady:NoExecute that is added by default to every pod that does not
153 already have such a toleration.
154 --default-unreachable-toleration-seconds=300
157 Indicates the tolerationSeconds of the toleration for unreach‐
158 able:NoExecute that is added by default to every pod that does not
159 already have such a toleration.
160 --docker="unix:///var/run/docker.sock"
163 docker endpoint
164 --docker-tls=false
167 use TLS to connect to docker
168 --docker-tls-ca="ca.pem"
171 path to trusted CA
172 --docker-tls-cert="cert.pem"
175 path to client certificate
176 --docker-tls-key="key.pem"
179 path to private key
180 --docker_env_metadata_whitelist=""
183 a comma-separated list of environment variable keys that needs to
184 be collected for docker containers
185 --docker_only=false
188 Only report docker containers in addition to root stats
189 --docker_root="/var/lib/docker"
192 DEPRECATED: docker root is read from docker info (this is a fall‐
193 back, default: /var/lib/docker)
194 --enable_load_reader=false
197 Whether to enable cpu load reader
198 --event_storage_age_limit="default=24h"
201 Max length of time for which to store events (per type). Value is a
202 comma separated list of key values, where the keys are event types
203 (e.g.: creation, oom) or "default" and the value is a duration. Default
204 is applied to all non-specified event types
205 --event_storage_event_limit="default=100000"
208 Max number of events to store (per type). Value is a comma sepa‐
209 rated list of key values, where the keys are event types (e.g.: cre‐
210 ation, oom) or "default" and the value is an integer. Default is
211 applied to all non-specified event types
212 --global_housekeeping_interval=0
215 Interval between global housekeepings
216 --housekeeping_interval=0
219 Interval between container housekeepings
220 --httptest.serve=""
223 if non-empty, httptest.NewServer serves on this address and blocks
224 --insecure-skip-tls-verify=false
227 If true, the server's certificate will not be checked for validity.
228 This will make your HTTPS connections insecure
229 --kubeconfig=""
232 Path to the kubeconfig file to use for CLI requests.
233 --log-flush-frequency=0
236 Maximum number of seconds between log flushes
237 --log_backtrace_at=:0
240 when logging hits line file:N, emit a stack trace
241 --log_cadvisor_usage=false
244 Whether to log the usage of the cAdvisor container
245 --log_dir=""
248 If non-empty, write log files in this directory
249 --logtostderr=true
252 log to standard error instead of files
253 --machine_id_file="/etc/machine-id,/var/lib/dbus/machine-id"
256 Comma-separated list of files to check for machine-id. Use the
257 first one that exists.
258 --match-server-version=false
261 Require server version to match client version
262 -n, --namespace=""
265 If present, the namespace scope for this CLI request
266 --request-timeout="0"
269 The length of time to wait before giving up on a single server
270 request. Non-zero values should contain a corresponding time unit (e.g.
271 1s, 2m, 3h). A value of zero means don't timeout requests.
272 -s, --server=""
275 The address and port of the Kubernetes API server
276 --stderrthreshold=2
279 logs at or above this threshold go to stderr
280 --storage_driver_buffer_duration=0
283 Writes in the storage driver will be buffered for this duration,
284 and committed to the non memory backends as a single transaction
285 --storage_driver_db="cadvisor"
288 database name
289 --storage_driver_host="localhost:8086"
292 database host:port
293 --storage_driver_password="root"
296 database password
297 --storage_driver_secure=false
300 use secure connection with database
301 --storage_driver_table="stats"
304 table name
305 --storage_driver_user="root"
308 database username
309 --token=""
312 Bearer token for authentication to the API server
313 --user=""
316 The name of the kubeconfig user to use
317 -v, --v=0
320 log level for V logs
321 --version=false
324 Print version information and quit
325 --vmodule=
328 comma-separated list of pattern=N settings for file-filtered log‐
329 ging
330
334 # Extract the busybox image into the current directory
335 oc image docker.io/library/busybox:latest
336 # Extract the busybox image to a temp directory (must exist)
338 oc image docker.io/library/busybox:latest --path /:/tmp/busybox
339 # Extract a single file from the image into the current directory
341 oc image docker.io/library/centos:7 --path /bin/bash:.
342 # Extract all .repo files from the image's /etc/yum.repos.d/ folder.
344 oc image docker.io/library/centos:7 --path /etc/yum.repos.d/*.repo:.
345 # Extract the last layer in the image
347 oc image docker.io/library/centos:7[-1]
348 # Extract the first three layers of the image
350 oc image docker.io/library/centos:7[:3]
351 # Extract the last three layers of the image
353 oc image docker.io/library/centos:7[-3:]
354
359 oc-image(1),
360
364 June 2016, Ported from the Kubernetes man-doc generator
365Openshift Openshift CLI User Manuals OC IMAGE(1)