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gcloud-help/gcloud/compute/connect-to-serial-port
2022-03-01 04:29:52 +00:00

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NAME
gcloud compute connect-to-serial-port - connect to the serial port of an
instance
SYNOPSIS
gcloud compute connect-to-serial-port [USER@]INSTANCE [--dry-run]
[--extra-args=KEY=VALUE,[KEY=VALUE,...]] [--force-key-file-overwrite]
[--port=PORT; default=1] [--ssh-key-file=SSH_KEY_FILE] [--zone=ZONE]
[--ssh-key-expiration=SSH_KEY_EXPIRATION
| --ssh-key-expire-after=SSH_KEY_EXPIRE_AFTER] [GCLOUD_WIDE_FLAG ...]
DESCRIPTION
gcloud compute connect-to-serial-port allows users to connect to, and
interact with, a VM's virtual serial port using ssh as the secure,
authenticated transport protocol.
The user must first enable serial port access to a given VM by setting the
'serial-port-enable=true' metadata key-value pair. Setting
'serial-port-enable' on the project-level metadata enables serial port
access to all VMs in the project.
This command uses the same SSH key pair as the gcloud compute ssh command
and also ensures that the user's public SSH key is present in the project's
metadata. If the user does not have a public SSH key, one is generated
using ssh-keygen.
EXAMPLES
To connect to the serial port of the instance 'my-instance' in zone
'us-central1-f', run:
$ gcloud compute connect-to-serial-port my-instance \
--zone=us-central1-f
POSITIONAL ARGUMENTS
[USER@]INSTANCE
Specifies the user/instance for the serial port connection.
USER specifies the username to authenticate as. If omitted, the current
OS user is selected.
FLAGS
--dry-run
If provided, the ssh command is printed to standard out rather than
being executed.
--extra-args=KEY=VALUE,[KEY=VALUE,...]
Optional arguments can be passed to the serial port connection by
passing key-value pairs to this flag, such as max-connections=N or
replay-lines=N. See
https://cloud.google.com/compute/docs/instances/interacting-with-serial-console
for additional options.
--force-key-file-overwrite
If enabled, the gcloud command-line tool will regenerate and overwrite
the files associated with a broken SSH key without asking for
confirmation in both interactive and non-interactive environments.
If disabled, the files associated with a broken SSH key will not be
regenerated and will fail in both interactive and non-interactive
environments.
--port=PORT; default=1
The number of the requested serial port. Can be 1-4, default is 1.
Instances can support up to four serial ports. By default, this command
will connect to the first serial port. Setting this flag will connect
to the requested serial port.
--ssh-key-file=SSH_KEY_FILE
The path to the SSH key file. By default, this is
~/.ssh/google_compute_engine.
--zone=ZONE
Zone of the instance to connect to. If not specified and the
compute/zone property isn't set, you might be prompted to select a zone
(interactive mode only).
To avoid prompting when this flag is omitted, you can set the
compute/zone property:
$ gcloud config set compute/zone ZONE
A list of zones can be fetched by running:
$ gcloud compute zones list
To unset the property, run:
$ gcloud config unset compute/zone
Alternatively, the zone can be stored in the environment variable
CLOUDSDK_COMPUTE_ZONE.
At most one of these can be specified:
--ssh-key-expiration=SSH_KEY_EXPIRATION
The time when the ssh key will be valid until, such as
"2017-08-29T18:52:51.142Z." This is only valid if the instance is not
using OS Login. See $ gcloud topic datetimes for information on time
formats.
--ssh-key-expire-after=SSH_KEY_EXPIRE_AFTER
The maximum length of time an SSH key is valid for once created and
installed, e.g. 2m for 2 minutes. See $ gcloud topic datetimes for
information on duration formats.
GCLOUD WIDE FLAGS
These flags are available to all commands: --access-token-file, --account,
--billing-project, --configuration, --flags-file, --flatten, --format,
--help, --impersonate-service-account, --log-http, --project, --quiet,
--trace-token, --user-output-enabled, --verbosity.
Run $ gcloud help for details.
NOTES
These variants are also available:
$ gcloud alpha compute connect-to-serial-port
$ gcloud beta compute connect-to-serial-port