Snippet service is used to automatically update resources in the device when conditions are satisfied or on-demand by the user.
docker pull ghcr.io/plgd-dev/hub/snippet-service:latest
A configuration template is available on snippet-service/config.yaml.
| Property | Type | Description | Default |
|---|---|---|---|
log.level | string | Logging enabled from level. | "info" |
log.encoding | string | Logging format. The supported values are: "json", "console" | "json" |
log.stacktrace.enabled | bool | Log stacktrace. | false |
log.stacktrace.level | string | Stacktrace from level. | "warn" |
log.encoderConfig.timeEncoder | string | Time format for logs. The supported values are: "rfc3339nano", "rfc3339". | "rfc3339nano" |
gRPC API of the Snippet service as defined here.
| Property | Type | Description | Default |
|---|---|---|---|
apis.grpc.address | string | Listening address in the format <host>:<port> for accepting gRPC client connections. | "0.0.0.0:9100" |
apis.grpc.sendMsgSize | int32 | Set the max message size in bytes the server can send. 0 means 2147483647. | 4194304 |
apis.grpc.recvMsgSize | int32 | Set the max message size in bytes the server can receive. 0 means 4194304. | 4194304 |
apis.grpc.enforcementPolicy.minTime | string | The minimum amount of time a client should wait before sending a keepalive ping. Otherwise, the server closes the connection. | 5s |
apis.grpc.enforcementPolicy.permitWithoutStream | bool | If true, the server allows keepalive pings even when there are no active streams (RPCs). Otherwise, the server closes the connection. | true |
apis.grpc.keepAlive.maxConnectionIdle | string | A duration for the amount of time after which an idle connection would be closed by sending a GoAway. 0s means infinity. | 0s |
apis.grpc.keepAlive.maxConnectionAge | string | A duration for the maximum amount of time a connection may exist before it will be closed by sending a GoAway. 0s means infinity. | 0s |
apis.grpc.keepAlive.maxConnectionAgeGrace | string | An additive period after MaxConnectionAge, after which the connection will be forcibly closed. 0s means infinity. | 0s |
apis.grpc.keepAlive.time | string | After a duration of this time if the server doesn't see any activity it pings the client to see if the transport is still alive. | 2h |
apis.grpc.keepAlive.timeout | string | After having pinged for keepalive check, the client waits for a duration of Timeout and if no activity is seen even after that the connection is closed. | 20s |
apis.grpc.tls.caPool | []string | File paths to the root certificates in PEM format. The file may contain multiple certificates. | [] |
apis.grpc.tls.keyFile | string | File path to private key in PEM format. | "" |
apis.grpc.tls.certFile | string | File path to certificate in PEM format. | "" |
apis.grpc.tls.clientCertificateRequired | bool | If true, require client certificate. | true |
apis.grpc.authorization.ownerClaim | string | Claim used to identify owner of the device. | "sub" |
apis.grpc.authorization.audience | string | Identifier of the API configured in your OAuth provider. | "" |
apis.grpc.authorization.endpoints[].authority | string | Authority is the address of the token-issuing authentication server. Services will use this URI to find and retrieve the public key that can be used to validate the token’s signature. | "" |
apis.grpc.authorization.endpoints[].http.maxIdleConns | int | It controls the maximum number of idle (keep-alive) connections across all hosts. Zero means no limit. | 16 |
apis.grpc.authorization.endpoints[].http.maxConnsPerHost | int | It optionally limits the total number of connections per host, including connections in the dialing, active, and idle states. On limit violation, dials will block. Zero means no limit. | 32 |
apis.grpc.authorization.endpoints[].http.maxIdleConnsPerHost | int | If non-zero, controls the maximum idle (keep-alive) connections to keep per-host. If zero, DefaultMaxIdleConnsPerHost is used. | 16 |
apis.grpc.authorization.endpoints[].http.idleConnTimeout | string | The maximum amount of time an idle (keep-alive) connection will remain idle before closing itself. Zero means no limit. | 30s |
apis.grpc.authorization.endpoints[].http.timeout | string | A time limit for requests made by this Client. A Timeout of zero means no timeout. | 10s |
apis.grpc.authorization.endpoints[].http.tls.caPool | []string | File paths to the root certificates in PEM format. The file may contain multiple certificates. | [] |
apis.grpc.authorization.endpoints[].http.tls.keyFile | string | File path to private key in PEM format. | "" |
apis.grpc.authorization.endpoints[].http.tls.certFile | string | File path to certificate in PEM format. | "" |
apis.grpc.authorization.endpoints[].http.tls.useSystemCAPool | bool | If true, use system certification pool. | false |
HTTP Snippet service APIs as defined by swagger.
The configurations apis.http.tls and apis.http.authorization are inherited from the gRPC API.
| Property | Type | Description | Default |
|---|---|---|---|
apis.http.address | string | Listen specification <host>:<port> for http client connection. | "0.0.0.0:9101" |
apis.http.readTimeout | string | The maximum duration for reading the entire request, including the body by the server. A zero or negative value means there will be no timeout. | 8s |
apis.http.readHeaderTimeout | string | The amount of time allowed to read request headers by the server. If readHeaderTimeout is zero, the value of readTimeout is used. If both are zero, there is no timeout. | 4s |
apis.http.writeTimeout | string | The maximum duration before the server times out writing of the response. A zero or negative value means there will be no timeout. | 16s |
apis.http.idleTimeout | string | The maximum amount of time the server waits for the next request when keep-alives are enabled. If idleTimeout is zero, the value of readTimeout is used. If both are zero, there is no timeout. | 30s |
plgd hub uses NATS messaging system as an event bus to be notified about device changes to trigger conditions evaluation.
| Property | Type | Description | Default |
|---|---|---|---|
clients.eventBus.nats.url | string | URL to nats messaging system. | "nats://localhost:4222" |
clients.eventBus.nats.pendingLimits.msgLimit | int | Limit number of messages in queue. -1 means unlimited | 524288 |
clients.eventBus.nats.pendingLimits.bytesLimit | int | Limit buffer size of queue. -1 means unlimited | 67108864 |
clients.eventBus.nats.tls.caPool | []string | File paths to the root certificates in PEM format. The file may contain multiple certificates. | [] |
clients.eventBus.nats.tls.keyFile | string | File name of private key in PEM format. | "" |
clients.eventBus.nats.tls.certFile | string | File name of certificate in PEM format. | "" |
clients.eventBus.nats.tls.useSystemCAPool | bool | If true, use system certification pool. | false |
clients.eventBus.nats.leadResourceType.enabled | bool | If true, subscribe to NATS with lead resource type subject token included. | false |
plgd hub uses MongoDB database as a storage for conditions, configurations and applied configurations.
| Property | Type | Description | Default |
|---|---|---|---|
clients.storage.cleanUpExpiredUpdates | string | Cron expression to clean up expired updates. | "0 * * * *" |
clients.storage.mongoDB.uri | string | URI to mongo database. | "mongodb://localhost:27017" |
clients.storage.mongoDB.database | string | Name of database | "snippetService" |
clients.storage.mongoDB.maxPoolSize | int | Limits number of connections. | 16 |
clients.storage.mongoDB.maxConnIdleTime | string | Close connection when idle time reach the value. | 4m |
clients.storage.mongoDB.tls.caPool | []string | File paths to the root certificates in PEM format. The file may contain multiple certificates. | [] |
clients.storage.mongoDB.tls.keyFile | string | File path to private key in PEM format. | "" |
clients.storage.mongoDB.tls.certFile | string | File path to certificate in PEM format. | "" |
clients.storage.mongoDB.tls.useSystemCAPool | bool | If true, use system certification pool. | false |
Resource Aggregate client is responsible for updating resources in the device when conditions are satisfied or on-demand by the user.
| Property | Type | Description | Default |
|---|---|---|---|
clients.resourceAggregate.grpc.address | string | Address of the Resource Aggregate. | "" |
clients.resourceAggregate.grpc.sendMsgSize | int32 | Set the max message size in bytes the server can send. 0 means 2147483647. | 4194304 |
clients.resourceAggregate.grpc.recvMsgSize | int32 | Set the max message size in bytes the server can receive. 0 means 4194304. | 4194304 |
clients.resourceAggregate.grpc.enforcementPolicy.minTime | string | The minimum amount of time a client should wait before sending a keepalive ping. Otherwise, the server closes the connection. | 5s |
clients.resourceAggregate.grpc.enforcementPolicy.permitWithoutStream | bool | If true, the server allows keepalive pings even when there are no active streams (RPCs). Otherwise, the server closes the connection. | true |
clients.resourceAggregate.grpc.keepAlive.maxConnectionIdle | string | A duration for the amount of time after which an idle connection would be closed by sending a GoAway. 0s means infinity. | 0s |
clients.resourceAggregate.grpc.keepAlive.maxConnectionAge | string | A duration for the maximum amount of time a connection may exist before it will be closed by sending a GoAway. 0s means infinity. | 0s |
clients.resourceAggregate.grpc.keepAlive.maxConnectionAgeGrace | string | An additive period after MaxConnectionAge, after which the connection will be forcibly closed. 0s means infinity. | 0s |
clients.resourceAggregate.grpc.keepAlive.time | string | After a duration of this time if the server doesn't see any activity it pings the client to see if the transport is still alive. | 2h |
clients.resourceAggregate.grpc.keepAlive.timeout | string | After having pinged for keepalive check, the client waits for a duration of Timeout and if no activity is seen even after that the connection is closed. | 20s |
clients.resourceAggregate.grpc.tls.caPool | []string | File paths to the root certificates in PEM format. The file may contain multiple certificates. | [] |
clients.resourceAggregate.grpc.tls.keyFile | string | File path to private key in PEM format. | "" |
clients.resourceAggregate.grpc.tls.certFile | string | File path to certificate in PEM format. | "" |
clients.resourceAggregate.grpc.tls.useSystemCAPool | bool | If true, use system certification pool. | false |
The plgd open telemetry exporter configuration.
| Property | Type | Description | Default |
|---|---|---|---|
clients.openTelemetryCollector.grpc.enabled | bool | Enable OTLP gRPC exporter | false |
clients.openTelemetryCollector.grpc.address | string | The gRPC collector to which the exporter is going to send data | "" |
clients.openTelemetryCollector.grpc.keepAlive.time | string | After a duration of this time if the client doesn't see any activity it pings the server to see if the transport is still alive. | 10s |
clients.openTelemetryCollector.grpc.keepAlive.timeout | string | After having pinged for keepalive check, the client waits for a duration of Timeout and if no activity is seen even after that the connection is closed. | 20s |
clients.openTelemetryCollector.grpc.keepAlive.permitWithoutStream | bool | If true, client sends keepalive pings even with no active RPCs. If false, when there are no active RPCs, Time and Timeout will be ignored and no keepalive pings will be sent. | true |
clients.openTelemetryCollector.grpc.tls.caPool | string | File path to the root certificate in PEM format which might contain multiple certificates in a single file. | "" |
clients.openTelemetryCollector.grpc.tls.keyFile | string | File path to private key in PEM format. | "" |
clients.openTelemetryCollector.grpc.tls.certFile | string | File path to certificate in PEM format. | "" |
clients.openTelemetryCollector.grpc.tls.useSystemCAPool | bool | If true, use system certification pool. | false |
Note that the string type related to time (i.e. timeout, idleConnTimeout, expirationTime) is decimal numbers, each with optional fraction and a unit suffix, such as “300ms”, “1.5h” or “2h45m”. Valid time units are “ns”, “us”, “ms”, “s”, “m”, “h”.
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