Airflow: How to SSH and run BashOperator from a different server

Airflow: How to SSH and run BashOperator from a different server

To execute a BashOperator in Apache Airflow from a different server using SSH, you can follow these steps:

  1. Install Paramiko:

    Paramiko is a Python library that provides SSH functionality. Install it using:

    pip install paramiko

  2. Create a Custom SSHOperator:

    You can create a custom SSHOperator by subclassing the existing SSHOperator. This will allow you to execute commands on a remote server using SSH.

    from airflow.contrib.operators.ssh_operator import SSHOperator from paramiko import SSHClient class CustomSSHOperator(SSHOperator): def __init__(self, *args, **kwargs): super(CustomSSHOperator, self).__init__(*args, **kwargs) def execute(self, context): self.log.info(f'Executing: {self.bash_command}') ssh_client = SSHClient() ssh_client.set_missing_host_key_policy(paramiko.AutoAddPolicy()) ssh_client.connect(self.ssh_conn_id) stdin, stdout, stderr = ssh_client.exec_command(self.bash_command) self.log.info(stdout.read().decode()) ssh_client.close()

  3. Define Your Task:

    Now, define your task using the custom SSHOperator. You'll need to provide the ssh_conn_id (the connection ID defined in Airflow) and the bash_command (the command to be executed on the remote server).

    from datetime import datetime from airflow import DAG from custom_ssh_operator import CustomSSHOperator dag = DAG('remote_ssh_task', schedule_interval=None, start_date=datetime(2023, 1, 1)) task = CustomSSHOperator( task_id='remote_task', ssh_conn_id='your_ssh_conn_id', bash_command='echo "Hello from remote server"', dag=dag )

  4. Create SSH Connection:

    In the Airflow UI, navigate to the "Admin" section and then "Connections". Create a new SSH connection with the necessary details (hostname, username, password, etc.) for the remote server.

  5. Trigger the DAG:

    Once you've defined the task and created the SSH connection, trigger the DAG to run the task. The task will execute the bash_command on the remote server using SSH.

Remember to replace placeholders (your_ssh_conn_id, hostname, etc.) with the actual values that apply to your setup.

Examples

  1. "Airflow SSH BashOperator from another server" Description: This query seeks information on how to execute a BashOperator in Airflow on a remote server using SSH.

    from airflow import DAG from airflow.contrib.operators.ssh_operator import SSHOperator from datetime import datetime default_args = { 'owner': 'airflow', 'depends_on_past': False, 'start_date': datetime(2024, 3, 1), 'email_on_failure': False, 'email_on_retry': False, 'retries': 1, } dag = DAG('ssh_example_dag', default_args=default_args, schedule_interval='@daily') task_ssh = SSHOperator( task_id="run_script_on_remote_server", ssh_conn_id="my_ssh_conn", command="bash /path/to/remote_script.sh", dag=dag )

    This code demonstrates how to use the SSHOperator in Airflow to run a Bash script (remote_script.sh) located on a different server.

  2. "Airflow SSHOperator remote Bash execution" Description: This query aims to learn how to utilize Airflow's SSHOperator to execute a Bash command on a remote server.

    from airflow import DAG from airflow.contrib.operators.ssh_operator import SSHOperator from datetime import datetime default_args = { 'owner': 'airflow', 'depends_on_past': False, 'start_date': datetime(2024, 3, 1), 'email_on_failure': False, 'email_on_retry': False, 'retries': 1, } dag = DAG('ssh_example_dag', default_args=default_args, schedule_interval='@daily') task_ssh = SSHOperator( task_id="run_command_remotely", ssh_conn_id="my_ssh_conn", command="ls /path/to/directory", dag=dag )

    This code snippet demonstrates how to use SSHOperator in Airflow to execute the ls command on a remote server to list files in a specific directory.

  3. "Running BashOperator on remote server using Airflow SSH" Description: This query seeks guidance on executing a BashOperator in Airflow on a server different from the Airflow instance using SSH.

    from airflow import DAG from airflow.contrib.operators.ssh_operator import SSHOperator from datetime import datetime default_args = { 'owner': 'airflow', 'depends_on_past': False, 'start_date': datetime(2024, 3, 1), 'email_on_failure': False, 'email_on_retry': False, 'retries': 1, } dag = DAG('ssh_example_dag', default_args=default_args, schedule_interval='@daily') task_ssh = SSHOperator( task_id="run_bash_script_remotely", ssh_conn_id="my_ssh_conn", bash_command="bash /path/to/remote_script.sh", dag=dag )

    This code demonstrates how to execute a Bash script (remote_script.sh) on a remote server using the SSHOperator in Airflow.

  4. "Executing BashOperator remotely with Airflow SSH" Description: This query seeks information on executing a BashOperator remotely in Airflow using SSH for server interaction.

    from airflow import DAG from airflow.contrib.operators.ssh_operator import SSHOperator from datetime import datetime default_args = { 'owner': 'airflow', 'depends_on_past': False, 'start_date': datetime(2024, 3, 1), 'email_on_failure': False, 'email_on_retry': False, 'retries': 1, } dag = DAG('ssh_example_dag', default_args=default_args, schedule_interval='@daily') task_ssh = SSHOperator( task_id="execute_command_remotely", ssh_conn_id="my_ssh_conn", command="echo 'Hello from remote server'", dag=dag )

    This code snippet demonstrates how to use Airflow's SSHOperator to execute a command remotely on another server, printing "Hello from remote server".

  5. "Airflow SSHOperator execute Bash remotely" Description: This query aims to learn how to use Airflow's SSHOperator to execute a Bash command remotely on another server.

    from airflow import DAG from airflow.contrib.operators.ssh_operator import SSHOperator from datetime import datetime default_args = { 'owner': 'airflow', 'depends_on_past': False, 'start_date': datetime(2024, 3, 1), 'email_on_failure': False, 'email_on_retry': False, 'retries': 1, } dag = DAG('ssh_example_dag', default_args=default_args, schedule_interval='@daily') task_ssh = SSHOperator( task_id="execute_bash_remotely", ssh_conn_id="my_ssh_conn", bash_command="echo 'Executing Bash remotely'", dag=dag )

    This code demonstrates how to use Airflow's SSHOperator to execute a Bash command remotely on another server, printing "Executing Bash remotely".

  6. "Running BashOperator remotely in Airflow" Description: This query seeks guidance on running a BashOperator remotely in Airflow, specifically using SSH for remote execution.

    from airflow import DAG from airflow.contrib.operators.ssh_operator import SSHOperator from datetime import datetime default_args = { 'owner': 'airflow', 'depends_on_past': False, 'start_date': datetime(2024, 3, 1), 'email_on_failure': False, 'email_on_retry': False, 'retries': 1, } dag = DAG('ssh_example_dag', default_args=default_args, schedule_interval='@daily') task_ssh = SSHOperator( task_id="run_script_remotely", ssh_conn_id="my_ssh_conn", bash_command="bash /path/to/remote_script.sh", dag=dag )

    This code snippet demonstrates how to execute a Bash script (remote_script.sh) on a remote server using the SSHOperator in Airflow.

  7. "How to SSH and run BashOperator remotely in Airflow" Description: This query seeks a guide on how to SSH into a remote server and run a BashOperator in Airflow for remote command execution.

    from airflow import DAG from airflow.contrib.operators.ssh_operator import SSHOperator from datetime import datetime default_args = { 'owner': 'airflow', 'depends_on_past': False, 'start_date': datetime(2024, 3, 1), 'email_on_failure': False, 'email_on_retry': False, 'retries': 1, } dag = DAG('ssh_example_dag', default_args=default_args, schedule_interval='@daily') task_ssh = SSHOperator( task_id="run_bash_remotely", ssh_conn_id="my_ssh_conn", bash_command="echo 'Running Bash remotely'", dag=dag )

    This code demonstrates how to SSH into a remote server and run a Bash command remotely using the SSHOperator in Airflow.

  8. "Airflow SSHOperator run Bash on another server" Description: This query aims to understand how to use Airflow's SSHOperator to run a Bash command on a different server.

    from airflow import DAG from airflow.contrib.operators.ssh_operator import SSHOperator from datetime import datetime default_args = { 'owner': 'airflow', 'depends_on_past': False, 'start_date': datetime(2024, 3, 1), 'email_on_failure': False, 'email_on_retry': False, 'retries': 1, } dag = DAG('ssh_example_dag', default_args=default_args, schedule_interval='@daily') task_ssh = SSHOperator( task_id="execute_command_remotely", ssh_conn_id="my_ssh_conn", command="echo 'Executing command on remote server'", dag=dag )

    This code snippet demonstrates how to use Airflow's SSHOperator to execute a command remotely on another server, printing "Executing command on remote server".

  9. "Airflow SSHOperator execute command remotely" Description: This query aims to learn how to use Airflow's SSHOperator to execute a command remotely on another server.

    from airflow import DAG from airflow.contrib.operators.ssh_operator import SSHOperator from datetime import datetime default_args = { 'owner': 'airflow', 'depends_on_past': False, 'start_date': datetime(2024, 3, 1), 'email_on_failure': False, 'email_on_retry': False, 'retries': 1, } dag = DAG('ssh_example_dag', default_args=default_args, schedule_interval='@daily') task_ssh = SSHOperator( task_id="execute_command_remotely", ssh_conn_id="my_ssh_conn", command="echo 'Executing command remotely'", dag=dag )

    This code demonstrates how to use Airflow's SSHOperator to execute a command remotely on another server, printing "Executing command remotely".

  10. "Airflow SSHOperator run script remotely" Description: This query seeks information on how to run a script remotely using Airflow's SSHOperator.

    from airflow import DAG from airflow.contrib.operators.ssh_operator import SSHOperator from datetime import datetime default_args = { 'owner': 'airflow', 'depends_on_past': False, 'start_date': datetime(2024, 3, 1), 'email_on_failure': False, 'email_on_retry': False, 'retries': 1, } dag = DAG('ssh_example_dag', default_args=default_args, schedule_interval='@daily') task_ssh = SSHOperator( task_id="run_script_remotely", ssh_conn_id="my_ssh_conn", command="bash /path/to/remote_script.sh", dag=dag )

    This code demonstrates how to use Airflow's SSHOperator to run a Bash script (remote_script.sh) remotely on another server.

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