1KUBERNETES(1) Jan 2015 KUBERNETES(1)
2
6 kubectl logs - Print the logs for a container in a pod
7
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 --limit-bytes=0
40 Maximum bytes of logs to return. Defaults to no limit.
41 --max-log-requests=5
44 Specify maximum number of concurrent logs to follow when using by a
45 selector. Defaults to 5.
46 --pod-running-timeout=20s
49 The length of time (like 5s, 2m, or 3h, higher than zero) to wait
50 until at least one pod is running
51 -p, --previous=false
54 If true, print the logs for the previous instance of the container
55 in a pod if it exists.
56 -l, --selector=""
59 Selector (label query) to filter on.
60 --since=0s
63 Only return logs newer than a relative duration like 5s, 2m, or 3h.
64 Defaults to all logs. Only one of since-time / since may be used.
65 --since-time=""
68 Only return logs after a specific date (RFC3339). Defaults to all
69 logs. Only one of since-time / since may be used.
70 --tail=-1
73 Lines of recent log file to display. Defaults to -1 with no selec‐
74 tor, showing all log lines otherwise 10, if a selector is provided.
75 --timestamps=false
78 Include timestamps on each line in the log output
79
83 --alsologtostderr=false
84 log to standard error as well as files
85 --application-metrics-count-limit=100
88 Max number of application metrics to store (per container)
89 --as=""
92 Username to impersonate for the operation
93 --as-group=[]
96 Group to impersonate for the operation, this flag can be repeated
97 to specify multiple groups.
98 --azure-container-registry-config=""
101 Path to the file containing Azure container registry configuration
102 information.
103 --boot-id-file="/proc/sys/kernel/random/boot_id"
106 Comma-separated list of files to check for boot-id. Use the first
107 one that exists.
108 --cache-dir="/builddir/.kube/http-cache"
111 Default HTTP cache directory
112 --certificate-authority=""
115 Path to a cert file for the certificate authority
116 --client-certificate=""
119 Path to a client certificate file for TLS
120 --client-key=""
123 Path to a client key file for TLS
124 --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
127 CIDRs opened in GCE firewall for LB traffic proxy health checks
128 --cluster=""
131 The name of the kubeconfig cluster to use
132 --container-hints="/etc/cadvisor/container_hints.json"
135 location of the container hints file
136 --containerd="/run/containerd/containerd.sock"
139 containerd endpoint
140 --containerd-namespace="k8s.io"
143 containerd namespace
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-env-metadata-whitelist=""
167 a comma-separated list of environment variable keys that needs to
168 be collected for docker containers
169 --docker-only=false
172 Only report docker containers in addition to root stats
173 --docker-root="/var/lib/docker"
176 DEPRECATED: docker root is read from docker info (this is a fall‐
177 back, default: /var/lib/docker)
178 --docker-tls=false
181 use TLS to connect to docker
182 --docker-tls-ca="ca.pem"
185 path to trusted CA
186 --docker-tls-cert="cert.pem"
189 path to client certificate
190 --docker-tls-key="key.pem"
193 path to private key
194 --enable-load-reader=false
197 Whether to enable cpu load reader
198 --event-storage-age-limit="default=0"
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=0"
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=1m0s
215 Interval between global housekeepings
216 --housekeeping-interval=10s
219 Interval between container housekeepings
220 --insecure-skip-tls-verify=false
223 If true, the server's certificate will not be checked for validity.
224 This will make your HTTPS connections insecure
225 --kubeconfig=""
228 Path to the kubeconfig file to use for CLI requests.
229 --log-backtrace-at=:0
232 when logging hits line file:N, emit a stack trace
233 --log-cadvisor-usage=false
236 Whether to log the usage of the cAdvisor container
237 --log-dir=""
240 If non-empty, write log files in this directory
241 --log-file=""
244 If non-empty, use this log file
245 --log-file-max-size=1800
248 Defines the maximum size a log file can grow to. Unit is megabytes.
249 If the value is 0, the maximum file size is unlimited.
250 --log-flush-frequency=5s
253 Maximum number of seconds between log flushes
254 --logtostderr=true
257 log to standard error instead of files
258 --machine-id-file="/etc/machine-id,/var/lib/dbus/machine-id"
261 Comma-separated list of files to check for machine-id. Use the
262 first one that exists.
263 --match-server-version=false
266 Require server version to match client version
267 -n, --namespace=""
270 If present, the namespace scope for this CLI request
271 --password=""
274 Password for basic authentication to the API server
275 --profile="none"
278 Name of profile to capture. One of (none|cpu|heap|goroutine|thread‐
279 create|block|mutex)
280 --profile-output="profile.pprof"
283 Name of the file to write the profile to
284 --request-timeout="0"
287 The length of time to wait before giving up on a single server
288 request. Non-zero values should contain a corresponding time unit (e.g.
289 1s, 2m, 3h). A value of zero means don't timeout requests.
290 -s, --server=""
293 The address and port of the Kubernetes API server
294 --skip-headers=false
297 If true, avoid header prefixes in the log messages
298 --skip-log-headers=false
301 If true, avoid headers when opening log files
302 --stderrthreshold=2
305 logs at or above this threshold go to stderr
306 --storage-driver-buffer-duration=1m0s
309 Writes in the storage driver will be buffered for this duration,
310 and committed to the non memory backends as a single transaction
311 --storage-driver-db="cadvisor"
314 database name
315 --storage-driver-host="localhost:8086"
318 database host:port
319 --storage-driver-password="root"
322 database password
323 --storage-driver-secure=false
326 use secure connection with database
327 --storage-driver-table="stats"
330 table name
331 --storage-driver-user="root"
334 database username
335 --token=""
338 Bearer token for authentication to the API server
339 --update-machine-info-interval=5m0s
342 Interval between machine info updates.
343 --user=""
346 The name of the kubeconfig user to use
347 --username=""
350 Username for basic authentication to the API server
351 -v, --v=0
354 number for the log level verbosity
355 --version=false
358 Print version information and quit
359 --vmodule=
362 comma-separated list of pattern=N settings for file-filtered log‐
363 ging
364
368 # Return snapshot logs from pod nginx with only one container
369 kubectl logs nginx
370 # Return snapshot logs from pod nginx with multi containers
372 kubectl logs nginx --all-containers=true
373 # Return snapshot logs from all containers in pods defined by label app=nginx
375 kubectl logs -lapp=nginx --all-containers=true
376 # Return snapshot of previous terminated ruby container logs from pod web-1
378 kubectl logs -p -c ruby web-1
379 # Begin streaming the logs of the ruby container in pod web-1
381 kubectl logs -f -c ruby web-1
382 # Begin streaming the logs from all containers in pods defined by label app=nginx
384 kubectl logs -f -lapp=nginx --all-containers=true
385 # Display only the most recent 20 lines of output in pod nginx
387 kubectl logs --tail=20 nginx
388 # Show all logs from pod nginx written in the last hour
390 kubectl logs --since=1h nginx
391 # Return snapshot logs from first container of a job named hello
393 kubectl logs job/hello
394 # Return snapshot logs from container nginx-1 of a deployment named nginx
396 kubectl logs deployment/nginx -c nginx-1
397
402 kubectl(1),
403
407 January 2015, Originally compiled by Eric Paris (eparis at redhat dot
408 com) based on the kubernetes source material, but hopefully they have
409 been automatically generated since!
410Eric Paris kubernetes User Manuals KUBERNETES(1)