iExec Worker

Overview

The iExec Worker participates in a workerpool by computing tasks purchased by requesters on the iExec marketplace. The iExec Worker must connect to the iExec Core Scheduler of the workerpool to actively participate in the computation.

After registration, the iExec Worker sends a signal to the iExec Core Scheduler at a fixed rate. This signal is used to let the iExec Core Scheduler be aware of the iExec Worker liveness. At the moment, the rate is fixed and this signal is sent every 10 seconds. The iExec Worker will be considered as lost after several failures.

The iExec Worker is available as an OCI image on Docker Hub.

Configuration

You can configure the iExec Worker with the following properties:

| Environment variable | Description | Type | Default value | |-------------------------------------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------|--------------------------|-------------------------------------------------------------| | IEXEC_WORKER_PORT | Server HTTP port of the iExec Worker. | Positive integer | 13100 | | IEXEC_CORE_URL | URL to connect to the iExec Core Scheduler. | String | http://localhost:13000 | | IEXEC_WORKER_NAME | Public name of the iExec Worker. | String | worker | | POOL_ADDRESS | On-chain address of the workerpool managed by the iExec Core Scheduler, the default value must be changed. | String | 0x0 | | IEXEC_WORKER_BASE_DIR | Path to the folder within which the iExec Worker will read-and-write inputs and outputs of tasks. | String | /tmp/iexec-worker | | IEXEC_WORKER_OVERRIDE_AVAILABLE_CPU_COUNT | Number of CPUs available for computing distinct tasks. If not set, n-1 CPUs will be used, where n is the number of available processors. | Positive integer | | | IEXEC_WORKER_GPU_ENABLED | Declares if the iExec Worker is able to compute tasks requesting GPU mode. Note that if it is true, IEXEC_WORKER_OVERRIDE_AVAILABLE_CPU_COUNT will be ignored. | Boolean | false | | IEXEC_GAS_PRICE_MULTIPLIER | Transactions will be sent with networkGasPrice * IEXEC_GAS_PRICE_MULTIPLIER. | Float | 1.3 | | IEXEC_GAS_PRICE_CAP | In Wei, will be used for transactions if networkGasPrice * IEXEC_GAS_PRICE_MULTIPLIER > gasPriceCap. | Positive integer | 22000000000 | | IEXEC_WORKER_OVERRIDE_BLOCKCHAIN_NODE_ADDRESS | If set, will be used instead of the address given by the blockchain adapter. | String | | | IEXEC_DEVELOPER_LOGGER_ENABLED | Whether to print application logs of tasks. | Boolean |false | |IEXEC_WORKER_TEE_COMPUTE_MAX_HEAP_SIZE_GB | Max heap size for TEE apps. | Positive integer |8 | |IEXEC_WORKER_DOCKER_NETWORK_NAME | Internal Docker network name of the _iExec Worker_. Required for communication between worker and launched-by-worker containers. | String |iexec-worker-net | |IEXEC_WORKER_DOCKER_REGISTRY_USERNAME_0 | Username to pull apps from [official Docker registry](https://hub.docker.com/). | String | | |IEXEC_WORKER_DOCKER_REGISTRY_PASSWORD_0 | Password to pull apps from [official Docker registry](https://hub.docker.com/). | String | | |IEXEC_WORKER_DOCKER_REGISTRY_ADDRESS_1 | Custom Docker registry address. | String | | |IEXEC_WORKER_DOCKER_REGISTRY_USERNAME_1 | Username to pull apps from custom Docker registry. | String | | |IEXEC_WORKER_DOCKER_REGISTRY_PASSWORD_1 | Password to pull apps from custom Docker registry. | String | | |IEXEC_WORKER_DOCKER_IMAGE_MIN_PULL_TIMEOUT | Minimum timeout to pull Dapp images. | String |PT5M | |IEXEC_WORKER_DOCKER_IMAGE_MAX_PULL_TIMEOUT | Maximum timeout to pull Dapp images. | String |PT30M | |IEXEC_WORKER_WALLET_PATH | Path to the wallet that should be used by the _iExec Worker_. | String |./src/main/resources/wallet/encrypted-wallet_worker1.json| |IEXEC_WORKER_WALLET_PASSWORD | Password of the wallet that should be used by the _iExec Worker_. | String |whatever | |IEXEC_SCONE_SHOW_VERSION | Whether to display version of Scone. | Boolean |true | |IEXEC_SCONE_LOG_LEVEL | Log level Scone should use. | [0,7] or String |debug | |IEXEC_WORKER_SCONTAIN_REGISTRY_NAME | Host of the Scontain registry. Currently used to pull LAS image. | String |registry.scontain.com:5050 | |IEXEC_WORKER_SCONTAIN_REGISTRY_USERNAME | Username to connect to the Scontain registry. | String | | |IEXEC_WORKER_SCONTAIN_REGISTRY_PASSWORD | Password to connect to the Scontain registry. | String | | |IEXEC_LAS_PORT | Port the LAS should be started on. | Positive integer |18766` | |