docker/dtr reconfigure

Estimated reading time: 6 minutes

Change DTR configurations

Usage

docker run -it --rm docker/dtr \
    reconfigure [command options]

Description

This command changes DTR configuration settings.

DTR is restarted for the new configurations to take effect. To have no down time, configure your DTR for high-availability.

Options

Option	Environment Variable	Description
`--debug`	$DEBUG	Enable debug mode for additional logs.
`--dtr-ca`	$DTR_CA	Use a PEM-encoded TLS CA certificate for DTR. By default DTR generates a self-signed TLS certificate during deployment. You can use your own root CA public certificate with `--dtr-ca "$(cat ca.pem)"`.
`--dtr-cert`	$DTR_CERT	Use a PEM-encoded TLS certificate for DTR. By default DTR generates a self-signed TLS certificate during deployment. You can use your own public key certificate with `--dtr-cert "$(cat cert.pem)"`. If the certificate has been signed by an intermediate certificate authority, append its public key certificate at the end of the file to establish a chain of trust.
`--dtr-external-url`	$DTR_EXTERNAL_URL	URL of the host or load balancer clients use to reach DTR. When you use this flag, users are redirected to UCP for logging in. Once authenticated they are redirected to the URL you specify in this flag. If you don’t use this flag, DTR is deployed without single sign-on with UCP. Users and teams are shared but users log separately into the two applications. You can enable and disable single sign-on in the DTR settings. Format https://host[:port], where port is the value you used with `--replica-https-port`.
`--dtr-key`	$DTR_KEY	Use a PEM-encoded TLS private key for DTR. By default DTR generates a self-signed TLS certificate during deployment. You can use your own TLS private key with `--dtr-key "$(cat key.pem)"`.
`--dtr-storage-volume`	$DTR_STORAGE_VOLUME	Customize the volume to store Docker images. By default DTR creates a volume to store the Docker images in the local filesystem of the node where DTR is running, without high-availability. Use this flag to specify a full path or volume name for DTR to store images. For high-availability, make sure all DTR replicas can read and write data on this volume. If you’re using NFS, use `--nfs-storage-url` instead.
`--enable-pprof`	$DTR_PPROF	Enables pprof profiling of the server. Once DTR is deployed with this flag, you can access the pprof endpoint for the api server at /debug/pprof, and the registry endpoint at /registry_debug_pprof/debug/pprof.
`--enzi-ca`	$ENZI_TLS_CA	Use a PEM-encoded TLS CA certificate for Enzi.
`--enzi-host`	$ENZI_HOST	The Enzi host. Format host[:port].
`--enzi-insecure-tls`	$ENZI_TLS_INSECURE	Disable TLS verification for Enzi.
`--existing-replica-id`	$DTR_REPLICA_ID	The ID of an existing DTR replica. To safely remove a DTR replica from the cluster, the remove command needs to notify a healthy replica about the replica that’s about to be removed.
`--help-extended`	$DTR_EXTENDED_HELP	Display extended help text for a given command.
`--http-proxy`	$DTR_HTTP_PROXY	The HTTP proxy used for outgoing requests.
`--https-proxy`	$DTR_HTTPS_PROXY	The HTTPS proxy used for outgoing requests.
`--log-host`	$LOG_HOST	Where to send logs to. The endpoint to send logs to. Use this flag if you set `--log-protocol` to tcp or udp.
`--log-level`	$LOG_LEVEL	Log level for all container logs when logging to syslog. Default: INFO.
`--log-protocol`	$LOG_PROTOCOL	The protocol for sending logs. Default is internal. This allows to define the protocol used to send container logs to an external system. The supported protocols are tcp, udp, or internal. Use this flag with `--log-host`.
`--nfs-storage-url`	$NFS_STORAGE_URL	NFS to store Docker images. Format nfs://<ip\|hostname>/ . By default DTR creates a volume to store the Docker images in the local filesystem of the node where DTR is running, without high-availability. Use this flag to specify an NFS mount for DTR to store images, using the format nfs://<ip\|hostname>/. To use this flag, you need to install an NFS client library like nfs-common in the node where you're deploying DTR. You can test this by running showmount -e . When you join new replicas, they will start using NFS so you don't need to use this flag. To reconfigure DTR to stop using NFS, leave this option empty.
`--no-proxy`	$DTR_NO_PROXY	List of domains the proxy should not be used for. When using `--http-proxy` you can use this flag to specify a list of domains that you don’t want to route through the proxy. Format acme.com[, acme.org].
`--replica-http-port`	$REPLICA_HTTP_PORT	The public HTTP port for the DTR replica. Default is 80. This allows you to customize the HTTP port where users can reach DTR. Once users access the HTTP port, they are redirected to use an HTTPS connection, using the port specified with `--replica-https-port`. This port can also be used for unencrypted health checks.
`--replica-https-port`	$REPLICA_HTTPS_PORT	The public HTTPS port for the DTR replica. Default is 443. This allows you to customize the HTTPS port where users can reach DTR. Each replica can use a different port.
`--ucp-ca`	$UCP_CA	Use a PEM-encoded TLS CA certificate for UCP. Download the UCP TLS CA certificate from https:// /ca, and use --ucp-ca "$(cat ca.pem)".
`--ucp-insecure-tls`	$UCP_INSECURE_TLS	Disable TLS verification for UCP. The installation uses TLS but always trusts the TLS certificate used by UCP, which can lead to man-in-the-middle attacks. For production deployments, use --ucp-ca “$(cat ca.pem)” instead.
`--ucp-password`	$UCP_PASSWORD	The UCP administrator password.
`--ucp-url`	$UCP_URL	The UCP URL including domain and port.
`--ucp-username`	$UCP_USERNAME	The UCP administrator username.

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