Add some config entry docs (#5808)
* Add some config entry docs * Update website/source/docs/agent/config_entries.html.md Co-Authored-By: mkeeler <mkeeler@users.noreply.github.com> * Update website/source/docs/agent/config_entries.html.md Co-Authored-By: mkeeler <mkeeler@users.noreply.github.com> * Get rid of double negative * Some incremental updates * Update the config list docs to not point to service-default related things. * A few more doc updates to get rid of some service-defaults specific linking info in the cli docs * In progress update * Update website/source/docs/agent/config_entries.html.md Co-Authored-By: mkeeler <mkeeler@users.noreply.github.com> * Reword bootstrap section * Update example proxy-defaults config * Finish up the examples section for managing config entries with the CLI * Update website/source/docs/agent/config_entries.html.md Co-Authored-By: mkeeler <mkeeler@users.noreply.github.com> * Use $ for shell command start * Make it very clear that the normal way to manage things is via the API/CLI * Update website/source/docs/agent/options.html.md Co-Authored-By: mkeeler <mkeeler@users.noreply.github.com>
This commit is contained in:
Matt Keeler
GitHub
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39a1fc62bb
commit
5385e31fc5
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@ -13,7 +13,8 @@ The `/config` endpoints create, update, delete and query central configuration
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entries registered with Consul. See the
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[agent configuration](/docs/agent/options.html#enable_central_service_config)
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for more information on how to enable this functionality for centrally
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configuring services.
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configuring services and [configuration entries docs](/docs/agent/config_entries.html) for a description
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of the configuration entries content.
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## Apply Configuration
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@ -59,9 +60,6 @@ The table below shows this endpoint's support for
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"Kind": "service-defaults",
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"Name": "web",
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"Protocol": "http",
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"Connect": {
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"SidecarProxy": false
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}
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}
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```
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@ -126,9 +124,6 @@ $ curl \
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"Kind": "service-defaults",
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"Name": "web",
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"Protocol": "http",
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"Connect": {
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"SidecarProxy": true
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},
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"CreateIndex": 15,
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"ModifyIndex": 35
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}
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@ -184,9 +179,6 @@ $ curl \
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"Kind": "service-defaults",
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"Name": "db",
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"Protocol": "tcp",
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"Connect": {
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"SidecarProxy": false
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},
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"CreateIndex": 16,
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"ModifyIndex": 16
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},
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@ -194,9 +186,6 @@ $ curl \
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"Kind": "service-defaults",
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"Name": "web",
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"Protocol": "http",
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"Connect": {
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"SidecarProxy": true
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},
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"CreateIndex": 13,
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"ModifyIndex": 13
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}
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@ -0,0 +1,160 @@
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---
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layout: "docs"
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page_title: "Configuration Entry Definitions"
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sidebar_current: "docs-agent-cfg_entries"
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description: |-
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Consul allows storing configuration entries centrally to be used as defaults for configuring other aspects of Consul.
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---
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# Configuration Entries
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Configuration entries can be created to provide cluster-wide defaults for various aspects of Consul. Every configuration
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entry has at least two fields: `Kind` and `Name`. Those two fields are used to uniquely identify a configuration entry.
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When put into configuration files, configuration entries can be specified as HCL or JSON objects.
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Example:
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```hcl
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Kind = "<supported kind>"
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Name = "<name of entry>"
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```
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The two supported `Kind` configuration entries are detailed below.
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## Configuration Entry Kinds
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### Proxy Defaults - `proxy-defaults`
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Proxy defaults allow for configuring global config defaults across all services for Connect proxy configuration. Currently,
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only one global entry is supported.
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```hcl
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Kind = "proxy-defaults"
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Name = "global"
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Config {
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local_connect_timeout_ms = 1000
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handshake_timeout_ms = 10000
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}
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```
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* `Kind` - Must be set to `proxy-defaults`
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* `Name` - Must be set to `global`
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* `Config` - An arbitrary map of configuration values used by Connect proxies. See
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#### Proxy Configuration References
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* [Consul's Builtin Proxy](/docs/connect/configuration.html#built-in-proxy-options)
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* [Envoy](/docs/connect/proxies/envoy.html#bootstrap-configuration)
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### Service Defaults - `service-defaults`
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Service defaults control default global values for a service, such as its protocol.
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```hcl
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Kind = "service-defaults"
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Name = "web"
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Protocol = "http"
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```
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* `Kind` - Must be set to `service-defaults`
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* `Name` - Set to the name of the service being configured.
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* `Protocol` - Sets the protocol of the service. This is used by Connect proxies for things like observability features.
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## Managing Configuration Entries
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Configuration entries should be managed with the Consul [CLI](/docs/commands/config.html) or [API](/api/config.html). Additionally,
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as a convenience for initial cluster bootstrapping, configuration entries can be specified in all of the Consul servers's
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[configuration files](/docs/agent/options.html#config_entries_bootstrap)
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### Managing Configuration Entries with the CLI
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#### Creating or Updating a Configuration Entry
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The [`consul config write`](/docs/commands/config/write.html) command is used to create and update configuration entries. This command
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will load either a JSON or HCL file holding the configuration entry definition and then will push this configuration to Consul.
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Example HCL Configuration File - `proxy-defaults.hcl`:
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```hcl
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Kind = "proxy-defaults"
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Name = "global"
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Config {
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local_connect_timeout_ms = 1000
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handshake_timeout_ms = 10000
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}
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```
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Then to apply this configuration, run:
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```bash
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$ consul config write proxy-defaults.hcl
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```
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If you need to make changes to a configuration entry, simple edit that file and then rerun the command.
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This command will not output anything unless there is an error in applying the configuration entry.
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The `write` command also supports a `-cas` option to enable performing a compare-and-swap operation to
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prevent overwriting other unknown modifications.
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#### Reading a Configuration Entry
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The [`consul config read`](/docs/commands/config/read.html) command is used to read the current value of a configuration entry. The
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configuration entry will be displayed in JSON form which is how its transmitted between the CLI client and Consul's HTTP API.
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Example:
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```bash
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$ consul config read -kind service-defaults -name web
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{
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"Kind": "service-defaults",
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"Name": "web",
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"Protocol": "http"
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}
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```
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#### Listing Configuration Entries
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The [`consul config list`](/docs/commands/config/list.html) command is used to list out all the configuration entries for a
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given kind.
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Example:
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```bash
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$ consul config list -kind service-defaults
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web
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api
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db
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```
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#### Deleting Configuration Entries
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The [`consul config delete`](/docs/commands/config/delete.html) command is used to delete an entry by specifying both its
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`kind` and `name`.
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Example:
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```bash
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$ consul config delete -kind service-defaults -name web
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```
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This command will not output anything when the deletion is successful.
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### Bootstrapping From A Configuration File
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Configuration entries can be bootstrapped by adding them inline to each Consul server’s configuration file. When a server
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gains leadership, it will attempt to initialize the configuration entries. If a configuration entry does not already exist
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outside of the servers configuration, then it will create it. If a configuration entry does exist, that matches both `kind`
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and `name`, then the server will do nothing.
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## Using Configuration Entries For Service Defaults
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When the agent is [configured](/docs/agent/options.html#enable_central_service_config) to enable central service configurations,
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it will look for service configuration defaults that match a registering service instance. If it finds any, the agent will merge
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those defaults with the service instance configuration. This allows for things like service protocol or proxy configuration to
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be defined globally and inherited by any affected service registrations.
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@ -821,15 +821,14 @@ default will automatically work with some tooling.
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The following sub-keys are available:
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* <a name="bootstrap"></a><a href="#config_entries_bootstrap">`bootstrap`</a>
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This object allows configuring centralized config entries to be bootstrapped
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by the leader. These entries will be reloaded during an agent config reload.
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* <a name="config_entries_bootstrap"></a><a href="#config_entries_bootstrap">`bootstrap`</a>
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This is a list of inlined config entries to insert into the state store when the Consul server
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gains leadership. This option is only applicable to server nodes. Each bootstrap
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entry will be created only if it does not exist. When reloading, any new entries
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that have been added to the configuration will be processed. See the
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[configuration entry docs](/docs/agent/config_entries.html) for more details about the
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contents of each entry.
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The following sub-keys are available:
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* <a name="proxy_defaults"></a><a href="#config_entries_bootstrap_proxy_defaults">`proxy_defaults`</a>
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This object should contain a mapping of config entry names to an opaque proxy configuration mapping.
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Currently the only supported name is `global`
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* <a name="connect"></a><a href="#connect">`connect`</a>
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This object allows setting options for the Connect feature.
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@ -1125,8 +1124,6 @@ default will automatically work with some tooling.
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things like service protocol or proxy configuration to be defined centrally and inherited by any
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affected service registrations.
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* <a name="enable_debug"></a><a href="#enable_debug">`enable_debug`</a> When set, enables some
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additional debugging features. Currently, this is only used to access runtime profiling HTTP endpoints, which
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are available with an `operator:read` ACL regardles of the value of `enable_debug`.
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@ -13,7 +13,8 @@ system. It exposes commands for creating, updating, reading, and deleting
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different kinds of config entries. See the
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[agent configuration](/docs/agent/options.html#enable_central_service_config)
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for more information on how to enable this functionality for centrally
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configuring services.
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configuring services and [configuration entries docs](/docs/agent/config_entries.html) for a description
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of the configuration entries content.
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## Usage
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@ -8,11 +8,9 @@ sidebar_current: "docs-commands-config-delete"
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Command: `consul config delete`
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The `config delete` command deletes the configuration entry
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specified by the kind and name. See the
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[agent configuration](/docs/agent/options.html#enable_central_service_config)
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for more information on how to enable this functionality for centrally
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configuring services.
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The `config delete` command deletes the configuration entry specified by the
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kind and name. See the [configuration entries docs](/docs/agent/config_entries.html)
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for more details about configuration entries.
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## Usage
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@ -9,10 +9,8 @@ sidebar_current: "docs-commands-config-list"
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Command: `consul config list`
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The `config list` command lists all given config entries of the given kind.
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See the
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[agent configuration](/docs/agent/options.html#enable_central_service_config)
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for more information on how to enable this functionality for centrally
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configuring services.
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See the [configuration entries docs](/docs/agent/config_entries.html) for more
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details about configuration entries.
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## Usage
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@ -10,9 +10,8 @@ Command: `consul config read`
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The `config read` command reads the config entry specified by the given
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kind and name and outputs its JSON representation. See the
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[agent configuration](/docs/agent/options.html#enable_central_service_config)
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for more information on how to enable this functionality for centrally
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configuring services.
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[configuration entries docs](/docs/agent/config_entries.html) for more
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details about configuration entries.
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## Usage
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@ -35,9 +34,6 @@ Usage: `consul config read [options]`
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"Kind": "service-defaults",
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"Name": "web",
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"Protocol": "http",
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"Connect": {
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"SidecarProxy": false
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},
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"CreateIndex": 13,
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"ModifyIndex": 13
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}
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@ -9,10 +9,8 @@ sidebar_current: "docs-commands-config-write"
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Command: `consul config write`
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The `config write` command creates or updates a centralized config entry.
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See the
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[agent configuration](/docs/agent/options.html#enable_central_service_config)
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for more information on how to enable this functionality for centrally
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configuring services.
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See the [configuration entries docs](/docs/agent/config_entries.html) for more
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details about configuration entries.
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## Usage
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@ -55,9 +53,6 @@ protocol and Connect fields.
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"Kind": "service-defaults",
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"Name": "web",
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"Protocol": "http",
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"Connect": {
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"SidecarProxy": false
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}
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}
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```
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@ -408,6 +408,9 @@
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<li<%= sidebar_current("docs-agent-config") %>>
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<a href="/docs/agent/options.html">Configuration</a>
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</li>
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<li<%= sidebar_current("docs-agent-cfg_entries") %>>
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<a href="/docs/agent/config_entries.html">Configuration Entries</a>
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</li>
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<li<%= sidebar_current("docs-agent-cloud-auto-join") %>>
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<a href="/docs/agent/cloud-auto-join.html">Cloud Auto-join</a>
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</li>
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