1KUBERNETES(1) Jan 2015 KUBERNETES(1)
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6 kubectl logs - Print the logs for a container in a pod
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11 kubectl logs [OPTIONS]
12
16 Print the logs for a container in a pod or specified resource. If the
17 pod has only one container, the container name is optional.
18
22 --all-containers=false
23 Get all containers' logs in the pod(s).
24 -c, --container=""
27 Print the logs of this container
28 -f, --follow=false
31 Specify if the logs should be streamed.
32 --ignore-errors=false
35 If watching / following pod logs, allow for any errors that occur
36 to be non-fatal
37 --insecure-skip-tls-verify-backend=false
40 Skip verifying the identity of the kubelet that logs are requested
41 from. In theory, an attacker could provide invalid log content back.
42 You might want to use this if your kubelet serving certificates have
43 expired.
44 --limit-bytes=0
47 Maximum bytes of logs to return. Defaults to no limit.
48 --max-log-requests=5
51 Specify maximum number of concurrent logs to follow when using by a
52 selector. Defaults to 5.
53 --pod-running-timeout=20s
56 The length of time (like 5s, 2m, or 3h, higher than zero) to wait
57 until at least one pod is running
58 --prefix=false
61 Prefix each log line with the log source (pod name and container
62 name)
63 -p, --previous=false
66 If true, print the logs for the previous instance of the container
67 in a pod if it exists.
68 -l, --selector=""
71 Selector (label query) to filter on.
72 --since=0s
75 Only return logs newer than a relative duration like 5s, 2m, or 3h.
76 Defaults to all logs. Only one of since-time / since may be used.
77 --since-time=""
80 Only return logs after a specific date (RFC3339). Defaults to all
81 logs. Only one of since-time / since may be used.
82 --tail=-1
85 Lines of recent log file to display. Defaults to -1 with no
86 selector, showing all log lines otherwise 10, if a selector is
87 provided.
88 --timestamps=false
91 Include timestamps on each line in the log output
92
96 --add-dir-header=false
97 If true, adds the file directory to the header
98 --alsologtostderr=false
101 log to standard error as well as files
102 --application-metrics-count-limit=100
105 Max number of application metrics to store (per container)
106 --as=""
109 Username to impersonate for the operation
110 --as-group=[]
113 Group to impersonate for the operation, this flag can be repeated
114 to specify multiple groups.
115 --azure-container-registry-config=""
118 Path to the file containing Azure container registry configuration
119 information.
120 --boot-id-file="/proc/sys/kernel/random/boot_id"
123 Comma-separated list of files to check for boot-id. Use the first
124 one that exists.
125 --cache-dir="/builddir/.kube/http-cache"
128 Default HTTP cache directory
129 --certificate-authority=""
132 Path to a cert file for the certificate authority
133 --client-certificate=""
136 Path to a client certificate file for TLS
137 --client-key=""
140 Path to a client key file for TLS
141 --cloud-provider-gce-l7lb-src-cidrs=130.211.0.0/22,35.191.0.0/16
144 CIDRs opened in GCE firewall for L7 LB traffic proxy health checks
145 --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
148 CIDRs opened in GCE firewall for L4 LB traffic proxy health checks
149 --cluster=""
152 The name of the kubeconfig cluster to use
153 --container-hints="/etc/cadvisor/container_hints.json"
156 location of the container hints file
157 --containerd="/run/containerd/containerd.sock"
160 containerd endpoint
161 --containerd-namespace="k8s.io"
164 containerd namespace
165 --context=""
168 The name of the kubeconfig context to use
169 --default-not-ready-toleration-seconds=300
172 Indicates the tolerationSeconds of the toleration for
173 notReady:NoExecute that is added by default to every pod that does not
174 already have such a toleration.
175 --default-unreachable-toleration-seconds=300
178 Indicates the tolerationSeconds of the toleration for
179 unreachable:NoExecute that is added by default to every pod that does
180 not already have such a toleration.
181 --disable-root-cgroup-stats=false
184 Disable collecting root Cgroup stats
185 --docker="unix:///var/run/docker.sock"
188 docker endpoint
189 --docker-env-metadata-whitelist=""
192 a comma-separated list of environment variable keys that needs to
193 be collected for docker containers
194 --docker-only=false
197 Only report docker containers in addition to root stats
198 --docker-root="/var/lib/docker"
201 DEPRECATED: docker root is read from docker info (this is a
202 fallback, default: /var/lib/docker)
203 --docker-tls=false
206 use TLS to connect to docker
207 --docker-tls-ca="ca.pem"
210 path to trusted CA
211 --docker-tls-cert="cert.pem"
214 path to client certificate
215 --docker-tls-key="key.pem"
218 path to private key
219 --enable-load-reader=false
222 Whether to enable cpu load reader
223 --event-storage-age-limit="default=0"
226 Max length of time for which to store events (per type). Value is a
227 comma separated list of key values, where the keys are event types
228 (e.g.: creation, oom) or "default" and the value is a duration. Default
229 is applied to all non-specified event types
230 --event-storage-event-limit="default=0"
233 Max number of events to store (per type). Value is a comma
234 separated list of key values, where the keys are event types (e.g.:
235 creation, oom) or "default" and the value is an integer. Default is
236 applied to all non-specified event types
237 --global-housekeeping-interval=1m0s
240 Interval between global housekeepings
241 --housekeeping-interval=10s
244 Interval between container housekeepings
245 --insecure-skip-tls-verify=false
248 If true, the server's certificate will not be checked for validity.
249 This will make your HTTPS connections insecure
250 --kubeconfig=""
253 Path to the kubeconfig file to use for CLI requests.
254 --log-backtrace-at=:0
257 when logging hits line file:N, emit a stack trace
258 --log-cadvisor-usage=false
261 Whether to log the usage of the cAdvisor container
262 --log-dir=""
265 If non-empty, write log files in this directory
266 --log-file=""
269 If non-empty, use this log file
270 --log-file-max-size=1800
273 Defines the maximum size a log file can grow to. Unit is megabytes.
274 If the value is 0, the maximum file size is unlimited.
275 --log-flush-frequency=5s
278 Maximum number of seconds between log flushes
279 --logtostderr=true
282 log to standard error instead of files
283 --machine-id-file="/etc/machine-id,/var/lib/dbus/machine-id"
286 Comma-separated list of files to check for machine-id. Use the
287 first one that exists.
288 --match-server-version=false
291 Require server version to match client version
292 -n, --namespace=""
295 If present, the namespace scope for this CLI request
296 --password=""
299 Password for basic authentication to the API server
300 --profile="none"
303 Name of profile to capture. One of
304 (none|cpu|heap|goroutine|threadcreate|block|mutex)
305 --profile-output="profile.pprof"
308 Name of the file to write the profile to
309 --request-timeout="0"
312 The length of time to wait before giving up on a single server
313 request. Non-zero values should contain a corresponding time unit (e.g.
314 1s, 2m, 3h). A value of zero means don't timeout requests.
315 -s, --server=""
318 The address and port of the Kubernetes API server
319 --skip-headers=false
322 If true, avoid header prefixes in the log messages
323 --skip-log-headers=false
326 If true, avoid headers when opening log files
327 --stderrthreshold=2
330 logs at or above this threshold go to stderr
331 --storage-driver-buffer-duration=1m0s
334 Writes in the storage driver will be buffered for this duration,
335 and committed to the non memory backends as a single transaction
336 --storage-driver-db="cadvisor"
339 database name
340 --storage-driver-host="localhost:8086"
343 database host:port
344 --storage-driver-password="root"
347 database password
348 --storage-driver-secure=false
351 use secure connection with database
352 --storage-driver-table="stats"
355 table name
356 --storage-driver-user="root"
359 database username
360 --tls-server-name=""
363 Server name to use for server certificate validation. If it is not
364 provided, the hostname used to contact the server is used
365 --token=""
368 Bearer token for authentication to the API server
369 --update-machine-info-interval=5m0s
372 Interval between machine info updates.
373 --user=""
376 The name of the kubeconfig user to use
377 --username=""
380 Username for basic authentication to the API server
381 -v, --v=0
384 number for the log level verbosity
385 --version=false
388 Print version information and quit
389 --vmodule=
392 comma-separated list of pattern=N settings for file-filtered
393 logging
394
398 # Return snapshot logs from pod nginx with only one container
399 kubectl logs nginx
400 # Return snapshot logs from pod nginx with multi containers
402 kubectl logs nginx --all-containers=true
403 # Return snapshot logs from all containers in pods defined by label app=nginx
405 kubectl logs -lapp=nginx --all-containers=true
406 # Return snapshot of previous terminated ruby container logs from pod web-1
408 kubectl logs -p -c ruby web-1
409 # Begin streaming the logs of the ruby container in pod web-1
411 kubectl logs -f -c ruby web-1
412 # Begin streaming the logs from all containers in pods defined by label app=nginx
414 kubectl logs -f -lapp=nginx --all-containers=true
415 # Display only the most recent 20 lines of output in pod nginx
417 kubectl logs --tail=20 nginx
418 # Show all logs from pod nginx written in the last hour
420 kubectl logs --since=1h nginx
421 # Show logs from a kubelet with an expired serving certificate
423 kubectl logs --insecure-skip-tls-verify-backend nginx
424 # Return snapshot logs from first container of a job named hello
426 kubectl logs job/hello
427 # Return snapshot logs from container nginx-1 of a deployment named nginx
429 kubectl logs deployment/nginx -c nginx-1
430
435 kubectl(1),
436
440 January 2015, Originally compiled by Eric Paris (eparis at redhat dot
441 com) based on the kubernetes source material, but hopefully they have
442 been automatically generated since!
443Eric Paris kubernetes User Manuals KUBERNETES(1)