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Telepresence2.4Laptop-side configuration
Laptop-side configuration
Global Configuration
Telepresence uses a config.yml file to store and change certain global configuration values that will be used for all clusters you use Telepresence with. The location of this file varies based on your OS:
- macOS:
$HOME/Library/Application Support/telepresence/config.yml - Linux:
$XDG_CONFIG_HOME/telepresence/config.ymlor, if that variable is not set,$HOME/.config/telepresence/config.yml - Windows:
%APPDATA%\telepresence\config.yml
For Linux, the above paths are for a user-level configuration. For system-level configuration, use the file at $XDG_CONFIG_DIRS/telepresence/config.yml or, if that variable is empty, /etc/xdg/telepresence/config.yml. If a file exists at both the user-level and system-level paths, the user-level path file will take precedence.
Values
The config file currently supports values for the timeouts, logLevels, images, cloud, and grpc keys.
Here is an example configuration to show you the conventions of how Telepresence is configured:
note: This config shouldn't be used verbatim, since the registry privateRepo used doesn't exist
Timeouts
Values for timeouts are all durations either as a number of seconds
or as a string with a unit suffix of ms, s, m, or h. Strings
can be fractional (1.5h) or combined (2h45m).
These are the valid fields for the timeouts key:
| Field | Description | Type | Default |
|---|---|---|---|
agentInstall | Waiting for Traffic Agent to be installed | int or float number of seconds, or duration string | 2 minutes |
apply | Waiting for a Kubernetes manifest to be applied | int or float number of seconds, or duration string | 1 minute |
clusterConnect | Waiting for cluster to be connected | int or float number of seconds, or duration string | 20 seconds |
intercept | Waiting for an intercept to become active | int or float number of seconds, or duration string | 5 seconds |
proxyDial | Waiting for an outbound connection to be established | int or float number of seconds, or duration string | 5 seconds |
trafficManagerConnect | Waiting for the Traffic Manager API to connect for port fowards | int or float number of seconds, or duration string | 20 seconds |
trafficManagerAPI | Waiting for connection to the gPRC API after trafficManagerConnect is successful | int or float number of seconds, or duration string | 15 seconds |
helm | Waiting for Helm operations (e.g. install) on the Traffic Manager | int or float number of seconds, or duration string | 2 minutes |
Log Levels
Values for the logLevels fields are one of the following strings,
case insensitive:
tracedebuginfowarningorwarnerror
For whichever log-level you select, you will get logs labeled with that level and of higher severity.
(e.g. if you use info, you will also get logs labeled error. You will NOT get logs labeled debug.
These are the valid fields for the logLevels key:
| Field | Description | Type | Default |
|---|---|---|---|
userDaemon | Logging level to be used by the User Daemon (logs to connector.log) | loglevel string | debug |
rootDaemon | Logging level to be used for the Root Daemon (logs to daemon.log) | loglevel string | info |
Images
Values for images are strings. These values affect the objects that are deployed in the cluster,
so it's important to ensure users have the same configuration.
Additionally, you can deploy the server-side components with Helm, to prevent them
from being overridden by a client's config and use the mutating-webhook
to handle installation of the traffic-agents.
These are the valid fields for the images key:
| Field | Description | Type | Default |
|---|---|---|---|
registry | Docker registry to be used for installing the Traffic Manager and default Traffic Agent. If not using a helm chart to deploy server-side objects, changing this value will create a new traffic-manager deployment when using Telepresence commands. Additionally, changing this value will update installed default traffic-agents to use the new registry when creating a new intercept. | Docker registry name string | docker.io/datawire |
agentImage | $registry/$imageName:$imageTag to use when installing the Traffic Agent. Changing this value will update pre-existing traffic-agents to use this new image. The registry value is not used for the traffic-agent if you have this value set. | qualified Docker image name string | (unset) |
webhookRegistry | The container $registry that the Traffic Manager will use with the webhookAgentImage This value is only used if a new traffic-manager is deployed | Docker registry name string | docker.io/datawire |
webhookAgentImage | The container image that the Traffic Manager will pull from the webhookRegistry when installing the Traffic Agent in annotated pods This value is only used if a new traffic-manager is deployed | non-qualified Docker image name string | (unset) |
Cloud
Values for cloud are listed below and their type varies, so please see the chart for the expected type for each config value.
These fields control how the client interacts with the Cloud service.
| Field | Description | Type | Default |
|---|---|---|---|
skipLogin | Whether the CLI should skip automatic login to Ambassador Cloud. If set to true, in order to perform personal intercepts you must have a license key installed in the cluster. | bool | false |
refreshMessages | How frequently the CLI should communicate with Ambassador Cloud to get new command messages, which also resets whether the message has been raised or not. You will see each message at most once within the duration given by this config | duration string | 168h |
systemaHost | The host used to communicate with Ambassador Cloud | string | app.getambassador.io |
systemaPort | The port used with systemaHost to communicate with Ambassador Cloud | string | 443 |
Telepresence attempts to auto-detect if the cluster is capable of
communication with Ambassador Cloud, but may still prompt you to log
in in cases where only the on-laptop client wishes to communicate with
Ambassador Cloud. If you want those auto-login points to be disabled
as well, or would like it to not attempt to communicate with
Ambassador Cloud at all (even for the auto-detection), then be sure to
set the skipLogin value to true.
Reminder: To use personal intercepts, which normally require a login,
you must have a license key in your cluster and specify which
agentImage should be installed by also adding the following to your
config.yml:
Grpc
The maxReceiveSize determines how large a message that the workstation receives via gRPC can be. The default is 4Mi (determined by gRPC). All traffic to and from the cluster is tunneled via gRPC.
The size is measured in bytes. You can express it as a plain integer or as a fixed-point number using E, G, M, or K. You can also use the power-of-two equivalents: Gi, Mi, Ki. For example, the following represent roughly the same value:
RESTful API server
The telepresenceAPI controls the behavior of Telepresence's RESTful API server that can be queried for additional information about ongoing intercepts. When present, and the port is set to a valid port number, it's propagated to the auto-installer so that application containers that can be intercepted gets the TELEPRESENCE_API_PORT environment set. The server can then be queried at localhost:<TELEPRESENCE_API_PORT>. In addition, the traffic-agent and the user-daemon on the workstation that performs an intercept will start the server on that port.
If the traffic-manager is auto-installed, its webhook agent injector will be configured to add the TELEPRESENCE_API_PORT environment to the app container when the traffic-agent is injected.
See RESTful API server for more info.
Intercept
The intercept controls applies to how telepresence will intercept the communications to the intercepted service.
The defaultPort controls which port is selected when no --port flag is given to the telepresence intercept command. The default value is "8080".
The appProtocolStrategy is only relevant when using personal intercepts. This controls how telepresence selects the application protocol to use when intercepting a service that has no service.ports.appProtocol defined. Valid values are:
| Value | Resulting action |
|---|---|
http2Probe | The telepresence traffic-agent will probe the intercepted container to check whether it supports http2 |
portName | Telepresence will make an educated guess about the protocol based on the name of the service port |
http | Telepresence will use http |
http2 | Telepresence will use http2 |
When portName is used, Telepresence will determine the protocol by the name of the port: <protocol>[-suffix]. The following protocols are recognized:
| Protocol | Meaning |
|---|---|
http | Plaintext HTTP/1.1 traffic |
http2 | Plaintext HTTP/2 traffic |
https | TLS Encrypted HTTP (1.1 or 2) traffic |
grpc | Same as http2 |
Per-Cluster Configuration
Some configuration is not global to Telepresence and is actually specific to a cluster. Thus, we store that config information in your kubeconfig file, so that it is easier to maintain per-cluster configuration.
Values
The current per-cluster configuration supports dns, alsoProxy, and manager keys.
To add configuration, simply add a telepresence.io entry to the cluster in your kubeconfig like so:
DNS
The fields for dns are: local-ip, remote-ip, exclude-suffixes, include-suffixes, and lookup-timeout.
| Field | Description | Type | Default |
|---|---|---|---|
local-ip | The address of the local DNS server. This entry is only used on Linux systems that are not configured to use systemd-resolved. | IP address string | first nameserver mentioned in /etc/resolv.conf |
remote-ip | The address of the cluster's DNS service. | IP address string | IP of the kube-dns.kube-system or the dns-default.openshift-dns service |
exclude-suffixes | Suffixes for which the DNS resolver will always fail (or fallback in case of the overriding resolver) | sequence of strings | [".arpa", ".com", ".io", ".net", ".org", ".ru"] |
include-suffixes | Suffixes for which the DNS resolver will always attempt to do a lookup. Includes have higher priority than excludes. | sequence of strings | [] |
lookup-timeout | Maximum time to wait for a cluster side host lookup. | duration string | 4 seconds |
Here is an example kubeconfig:
AlsoProxy
When using also-proxy, you provide a list of subnets after the key in your kubeconfig file to be added to the TUN device.
All connections to addresses that the subnet spans will be dispatched to the cluster
Here is an example kubeconfig for the subnet 1.2.3.4/32:
NeverProxy
When using never-proxy you provide a list of subnets after the key in your kubeconfig file. These will never be routed via the
TUN device, even if they fall within the subnets (pod or service) for the cluster. Instead, whatever route they have before
telepresence connects is the route they will keep.
Here is an example kubeconfig for the subnet 1.2.3.4/32:
Using AlsoProxy together with NeverProxy
Never proxy and also proxy are implemented as routing rules, meaning that when the two conflict, regular routing routes apply. Usually this means that the most specific route will win.
So, for example, if an also-proxy subnet falls within a broader never-proxy subnet:
Then the specific also-proxy of 10.0.5.0/24 will be proxied by the TUN device, whereas the rest of 10.0.0.0/16 will not.
Conversely if a never-proxy subnet is inside a larger also-proxy subnet:
Then all of the also-proxy of 10.0.0.0/16 will be proxied, with the exception of the specific never-proxy of 10.0.5.0/24
Manager
The manager key contains configuration for finding the traffic-manager that telepresence will connect to. It supports one key, namespace, indicating the namespace where the traffic manager is to be found
Here is an example kubeconfig that will instruct telepresence to connect to a manager in namespace staging:
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