1OC ADM PRUNE(1) June 2016 OC ADM PRUNE(1)
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6 oc adm prune images - Remove unreferenced images
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11 oc adm prune images [OPTIONS]
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16 Remove image stream tags, images, and image layers by age or usage
17 This command removes historical image stream tags, unused images, and
20 unreferenced image layers from the integrated registry. By default, all
21 images are considered as candidates. The command can be instructed to
22 consider only images that have been directly pushed to the registry by
23 supplying --all=false flag.
24 By default, the prune operation performs a dry run making no changes to
27 internal registry. A --confirm flag is needed for changes to be effec‐
28 tive. The flag requires a valid route to the integrated Docker reg‐
29 istry. If this command is run outside of the cluster network, the route
30 needs to be provided using --registry-url.
31 Only a user with a cluster role system:image-pruner or higher who is
34 logged-in will be able to actually delete the images.
35 If the registry is secured with a certificate signed by a self-signed
38 root certificate authority other than the one present in current user's
39 config, you may need to specify it using --certificate-authority flag.
40 Insecure connection is allowed in the following cases unless certifi‐
43 cate-authority is specified:
44 ·
46 · --force-insecure is given
49 · provided registry-url is prefixed with http://
51 · registry url is a private or link-local address
53 · user's config allows for insecure connection (the user logged in to
55 the cluster with --insecure-skip-tls-verify or allowed for insecure
56 connection)
57
60 --all=true
61 Include images that were imported from external registries as can‐
62 didates for pruning. If pruned, all the mirrored objects associated
63 with them will also be removed from the integrated registry.
64 --confirm=false
67 If true, specify that image pruning should proceed. Defaults to
68 false, displaying what would be deleted but not actually deleting any‐
69 thing. Requires a valid route to the integrated Docker registry (see
70 --registry-url).
71 --force-insecure=false
74 If true, allow an insecure connection to the docker registry that
75 is hosted via HTTP or has an invalid HTTPS certificate. Whenever possi‐
76 ble, use --certificate-authority instead of this dangerous option.
77 --ignore-invalid-refs=false
80 If true, the pruning process will ignore all errors while parsing
81 image references. This means that the pruning process will ignore the
82 intended connection between the object and the referenced image. As a
83 result an image may be incorrectly deleted as unused.
84 --keep-tag-revisions=3
87 Specify the number of image revisions for a tag in an image stream
88 that will be preserved.
89 --keep-younger-than=0
92 Specify the minimum age of an image and its referrers for it to be
93 considered a candidate for pruning.
94 --prune-over-size-limit=false
97 Specify if images which are exceeding LimitRanges (see 'open‐
98 shift.io/Image'), specified in the same namespace, should be considered
99 for pruning. This flag cannot be combined with --keep-younger-than nor
100 --keep-tag-revisions.
101 --prune-registry=true
104 If false, the prune operation will clean up image API objects, but
105 the none of the associated content in the registry is removed. Note,
106 if only image API objects are cleaned up through use of this flag, the
107 only means for subsequently cleaning up registry data corresponding to
108 those image API objects is to employ the 'hard prune' administrative
109 task.
110 --registry-url=""
113 The address to use when contacting the registry, instead of using
114 the default value. This is useful if you can't resolve or reach the
115 registry (e.g.; the default is a cluster-internal URL) but you do have
116 an alternative route that works. Particular transport protocol can be
117 enforced using '<scheme>://' prefix.
118
122 --allow_verification_with_non_compliant_keys=false
123 Allow a SignatureVerifier to use keys which are technically
124 non-compliant with RFC6962.
125 --alsologtostderr=false
128 log to standard error as well as files
129 --application_metrics_count_limit=100
132 Max number of application metrics to store (per container)
133 --as=""
136 Username to impersonate for the operation
137 --as-group=[]
140 Group to impersonate for the operation, this flag can be repeated
141 to specify multiple groups.
142 --azure-container-registry-config=""
145 Path to the file containing Azure container registry configuration
146 information.
147 --boot_id_file="/proc/sys/kernel/random/boot_id"
150 Comma-separated list of files to check for boot-id. Use the first
151 one that exists.
152 --cache-dir="/builddir/.kube/http-cache"
155 Default HTTP cache directory
156 --certificate-authority=""
159 Path to a cert file for the certificate authority
160 --client-certificate=""
163 Path to a client certificate file for TLS
164 --client-key=""
167 Path to a client key file for TLS
168 --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
171 CIDRs opened in GCE firewall for LB traffic proxy health checks
172 --cluster=""
175 The name of the kubeconfig cluster to use
176 --container_hints="/etc/cadvisor/container_hints.json"
179 location of the container hints file
180 --containerd="unix:///var/run/containerd.sock"
183 containerd endpoint
184 --context=""
187 The name of the kubeconfig context to use
188 --default-not-ready-toleration-seconds=300
191 Indicates the tolerationSeconds of the toleration for
192 notReady:NoExecute that is added by default to every pod that does not
193 already have such a toleration.
194 --default-unreachable-toleration-seconds=300
197 Indicates the tolerationSeconds of the toleration for unreach‐
198 able:NoExecute that is added by default to every pod that does not
199 already have such a toleration.
200 --docker="unix:///var/run/docker.sock"
203 docker endpoint
204 --docker-tls=false
207 use TLS to connect to docker
208 --docker-tls-ca="ca.pem"
211 path to trusted CA
212 --docker-tls-cert="cert.pem"
215 path to client certificate
216 --docker-tls-key="key.pem"
219 path to private key
220 --docker_env_metadata_whitelist=""
223 a comma-separated list of environment variable keys that needs to
224 be collected for docker containers
225 --docker_only=false
228 Only report docker containers in addition to root stats
229 --docker_root="/var/lib/docker"
232 DEPRECATED: docker root is read from docker info (this is a fall‐
233 back, default: /var/lib/docker)
234 --enable_load_reader=false
237 Whether to enable cpu load reader
238 --event_storage_age_limit="default=24h"
241 Max length of time for which to store events (per type). Value is a
242 comma separated list of key values, where the keys are event types
243 (e.g.: creation, oom) or "default" and the value is a duration. Default
244 is applied to all non-specified event types
245 --event_storage_event_limit="default=100000"
248 Max number of events to store (per type). Value is a comma sepa‐
249 rated list of key values, where the keys are event types (e.g.: cre‐
250 ation, oom) or "default" and the value is an integer. Default is
251 applied to all non-specified event types
252 --global_housekeeping_interval=0
255 Interval between global housekeepings
256 --housekeeping_interval=0
259 Interval between container housekeepings
260 --insecure-skip-tls-verify=false
263 If true, the server's certificate will not be checked for validity.
264 This will make your HTTPS connections insecure
265 --kubeconfig=""
268 Path to the kubeconfig file to use for CLI requests.
269 --log-flush-frequency=0
272 Maximum number of seconds between log flushes
273 --log_backtrace_at=:0
276 when logging hits line file:N, emit a stack trace
277 --log_cadvisor_usage=false
280 Whether to log the usage of the cAdvisor container
281 --log_dir=""
284 If non-empty, write log files in this directory
285 --logtostderr=true
288 log to standard error instead of files
289 --machine_id_file="/etc/machine-id,/var/lib/dbus/machine-id"
292 Comma-separated list of files to check for machine-id. Use the
293 first one that exists.
294 --match-server-version=false
297 Require server version to match client version
298 -n, --namespace=""
301 If present, the namespace scope for this CLI request
302 --request-timeout="0"
305 The length of time to wait before giving up on a single server
306 request. Non-zero values should contain a corresponding time unit (e.g.
307 1s, 2m, 3h). A value of zero means don't timeout requests.
308 -s, --server=""
311 The address and port of the Kubernetes API server
312 --stderrthreshold=2
315 logs at or above this threshold go to stderr
316 --storage_driver_buffer_duration=0
319 Writes in the storage driver will be buffered for this duration,
320 and committed to the non memory backends as a single transaction
321 --storage_driver_db="cadvisor"
324 database name
325 --storage_driver_host="localhost:8086"
328 database host:port
329 --storage_driver_password="root"
332 database password
333 --storage_driver_secure=false
336 use secure connection with database
337 --storage_driver_table="stats"
340 table name
341 --storage_driver_user="root"
344 database username
345 --token=""
348 Bearer token for authentication to the API server
349 --user=""
352 The name of the kubeconfig user to use
353 -v, --v=0
356 log level for V logs
357 --version=false
360 Print version information and quit
361 --vmodule=
364 comma-separated list of pattern=N settings for file-filtered log‐
365 ging
366
370 # See, what the prune command would delete if only images and their referrers were more than an hour old
371 # and obsoleted by 3 newer revisions under the same tag were considered.
372 oc adm prune images --keep-tag-revisions=3 --keep-younger-than=60m
373 # To actually perform the prune operation, the confirm flag must be appended
375 oc adm prune images --keep-tag-revisions=3 --keep-younger-than=60m --confirm
376 # See, what the prune command would delete if we're interested in removing images
378 # exceeding currently set limit ranges ('openshift.io/Image')
379 oc adm prune images --prune-over-size-limit
380 # To actually perform the prune operation, the confirm flag must be appended
382 oc adm prune images --prune-over-size-limit --confirm
383 # Force the insecure http protocol with the particular registry host name
385 oc adm prune images --registry-url=http://registry.example.org --confirm
386 # Force a secure connection with a custom certificate authority to the particular registry host name
388 oc adm prune images --registry-url=registry.example.org --certificate-authority=/path/to/custom/ca.crt --confirm
389
394 oc-adm-prune(1),
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399 June 2016, Ported from the Kubernetes man-doc generator
400Openshift Openshift CLI User Manuals OC ADM PRUNE(1)