Crea ed esegui il job AWS IoT con AWS IoT Device Client

Seleziona il bucket Amazon S3 in cui salvare il documento di processo. Se non disponi di un bucket Amazon S3 esistente da utilizzare per questo, dovrai creane uno. Per informazioni su come creare bucket Amazon S3, consulta gli argomenti in Nozioni di base su Amazon S3.

Creare e salvare il documento di processo per questo processo

1. Sul computer host locale, apri un editor di testo.

2. Copia e incolla questo testo nell'editor.

   {
       "operation": "echo",
       "args": ["Hello world!"]
   }

3. Nel computer host locale, salvare il contenuto dell'editor in un file denominato hello-world-job.json.

4. Conferma che il file sia stato salvato correttamente. Alcuni editor di testo aggiungono automaticamente .txt al nome del file quando salva un file di testo. Se il tuo editor ha aggiunto .txt al nome del file, correggere il nome del file prima di procedere.

Sostituisci il path_to_file con il percorso dihello-world-job.json, se non è nella directory corrente, sostituisci s3_bucket_name con il percorso del bucket Amazon S3 verso il bucket selezionato, quindi esegui questo comando per inserire il documento di lavoro nel bucket Amazon S3.

aws s3api put-object \
--key hello-world-job.json \
--body path_to_file/hello-world-job.json --bucket s3_bucket_name

Il documento di lavoro URL che identifica il documento di lavoro archiviato in Amazon S3 viene determinato sostituendo il s3_bucket_name e AWS_region nel seguito. URL Registra il risultato URL per utilizzarlo successivamente come job_document_path

https://s3_bucket_name.s3.AWS_Region.amazonaws.com/hello-world-job.json

Nella finestra del terminale del computer host locale collegato al Raspberry Pi, esegui questo comando per avviare il AWS IoT Device Client.

cd ~/aws-iot-device-client/build
./aws-iot-device-client --config-file ~/dc-configs/dc-jobs-config.json

Nella finestra del terminale, verifica che il AWS IoT Device Client e visualizzi questi messaggi

2021-11-15T18:45:56.708Z [INFO]  {Main.cpp}: Jobs is enabled
                      .
                      .
                      .
2021-11-15T18:45:56.708Z [INFO]  {Main.cpp}: Client base has been notified that Jobs has started
2021-11-15T18:45:56.708Z [INFO]  {JobsFeature.cpp}: Running Jobs!
2021-11-15T18:45:56.708Z [DEBUG] {JobsFeature.cpp}: Attempting to subscribe to startNextPendingJobExecution accepted and rejected
2021-11-15T18:45:56.708Z [DEBUG] {JobsFeature.cpp}: Attempting to subscribe to nextJobChanged events
2021-11-15T18:45:56.708Z [DEBUG] {JobsFeature.cpp}: Attempting to subscribe to updateJobExecutionStatusAccepted for jobId +
2021-11-15T18:45:56.738Z [DEBUG] {JobsFeature.cpp}: Ack received for SubscribeToUpdateJobExecutionAccepted with code {0}
2021-11-15T18:45:56.739Z [DEBUG] {JobsFeature.cpp}: Attempting to subscribe to updateJobExecutionStatusRejected for jobId +
2021-11-15T18:45:56.753Z [DEBUG] {JobsFeature.cpp}: Ack received for SubscribeToNextJobChanged with code {0}
2021-11-15T18:45:56.760Z [DEBUG] {JobsFeature.cpp}: Ack received for SubscribeToStartNextJobRejected with code {0}
2021-11-15T18:45:56.776Z [DEBUG] {JobsFeature.cpp}: Ack received for SubscribeToStartNextJobAccepted with code {0}
2021-11-15T18:45:56.776Z [DEBUG] {JobsFeature.cpp}: Ack received for SubscribeToUpdateJobExecutionRejected with code {0}
2021-11-15T18:45:56.777Z [DEBUG] {JobsFeature.cpp}: Publishing startNextPendingJobExecutionRequest
2021-11-15T18:45:56.785Z [DEBUG] {JobsFeature.cpp}: Ack received for StartNextPendingJobPub with code {0}
2021-11-15T18:45:56.785Z [INFO]  {JobsFeature.cpp}: No pending jobs are scheduled, waiting for the next incoming job

Nella finestra del terminale, dopo aver visualizzato questo messaggio, continua con la procedura successiva e crea la risorsa del processo. Attenzione: potrebbe non essere l'ultima voce dell'elenco.

2021-11-15T18:45:56.785Z [INFO]  {JobsFeature.cpp}: No pending jobs are scheduled, waiting for the next incoming job

Sul computer host locale:

1. Replace (Sostituisci) job_document_url con il documento di lavoro URL diCrea e archivia il documento di lavoro per il lavoro IoT.

2. Replace (Sostituisci) thing_arn con ARN la risorsa oggetto che hai creato per il tuo dispositivo e poi esegui questo comando.

   aws iot create-job \
   --job-id hello-world-job-1 \
   --document-source "job_document_url" \
   --targets "thing_arn" \
   --target-selection SNAPSHOT

   Se il comando viene eseguito correttamente, verrà visualizzato un risultato simile a quanto segue.

   {
     "jobArn": "arn:aws:iot:us-west-2:57EXAMPLE833:job/hello-world-job-1",
     "jobId": "hello-world-job-1"
   }

Nella finestra del terminale, dovresti vedere un output del AWS IoT Device Client in questo modo.

2021-11-15T18:02:26.688Z [INFO]  {JobsFeature.cpp}: No pending jobs are scheduled, waiting for the next incoming job
2021-11-15T18:10:24.890Z [DEBUG] {JobsFeature.cpp}: Job ids differ
2021-11-15T18:10:24.890Z [INFO]  {JobsFeature.cpp}: Executing job: hello-world-job-1
2021-11-15T18:10:24.890Z [DEBUG] {JobsFeature.cpp}: Attempting to update job execution status!
2021-11-15T18:10:24.890Z [DEBUG] {JobsFeature.cpp}: Not including stdout with the status details
2021-11-15T18:10:24.890Z [DEBUG] {JobsFeature.cpp}: Not including stderr with the status details
2021-11-15T18:10:24.890Z [DEBUG] {JobsFeature.cpp}: Assuming executable is in PATH
2021-11-15T18:10:24.890Z [INFO]  {JobsFeature.cpp}: About to execute: echo Hello world!
2021-11-15T18:10:24.890Z [DEBUG] {Retry.cpp}: Retryable function starting, it will retry until success
2021-11-15T18:10:24.890Z [DEBUG] {JobsFeature.cpp}: Created EphermalPromise for ClientToken 3TEWba9Xj6 in the updateJobExecution promises map
2021-11-15T18:10:24.890Z [DEBUG] {JobEngine.cpp}: Child process now running
2021-11-15T18:10:24.890Z [DEBUG] {JobEngine.cpp}: Child process about to call execvp
2021-11-15T18:10:24.890Z [DEBUG] {JobEngine.cpp}: Parent process now running, child PID is 16737
2021-11-15T18:10:24.891Z [DEBUG] {16737}: Hello world!
2021-11-15T18:10:24.891Z [DEBUG] {JobEngine.cpp}: JobEngine finished waiting for child process, returning 0
2021-11-15T18:10:24.891Z [INFO]  {JobsFeature.cpp}: Job exited with status: 0
2021-11-15T18:10:24.891Z [INFO]  {JobsFeature.cpp}: Job executed successfully!
2021-11-15T18:10:24.891Z [DEBUG] {JobsFeature.cpp}: Attempting to update job execution status!
2021-11-15T18:10:24.891Z [DEBUG] {JobsFeature.cpp}: Not including stdout with the status details
2021-11-15T18:10:24.891Z [DEBUG] {JobsFeature.cpp}: Not including stderr with the status details
2021-11-15T18:10:24.892Z [DEBUG] {Retry.cpp}: Retryable function starting, it will retry until success
2021-11-15T18:10:24.892Z [DEBUG] {JobsFeature.cpp}: Created EphermalPromise for ClientToken GmQ0HTzWGg in the updateJobExecution promises map
2021-11-15T18:10:24.905Z [DEBUG] {JobsFeature.cpp}: Ack received for PublishUpdateJobExecutionStatus with code {0}
2021-11-15T18:10:24.905Z [DEBUG] {JobsFeature.cpp}: Removing ClientToken 3TEWba9Xj6 from the updateJobExecution promises map
2021-11-15T18:10:24.905Z [DEBUG] {JobsFeature.cpp}: Success response after UpdateJobExecution for job hello-world-job-1
2021-11-15T18:10:24.917Z [DEBUG] {JobsFeature.cpp}: Ack received for PublishUpdateJobExecutionStatus with code {0}
2021-11-15T18:10:24.918Z [DEBUG] {JobsFeature.cpp}: Removing ClientToken GmQ0HTzWGg from the updateJobExecution promises map
2021-11-15T18:10:24.918Z [DEBUG] {JobsFeature.cpp}: Success response after UpdateJobExecution for job hello-world-job-1
2021-11-15T18:10:25.861Z [INFO]  {JobsFeature.cpp}: No pending jobs are scheduled, waiting for the next incoming job

Mentre il AWS IoT Device Client è in esecuzione e attende un lavoro, è possibile inviare un altro lavoro modificando il job-id valore e rieseguendolo create-job dal passaggio 1.