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Error calling BashOperator: Bash command failed

Here is my dag file and the BashOperator task:

my_dag = { 
dag_id = 'my_dag',
start_date = datetime(year=2017, month=3, day=28),
schedule_interval='01***',
}

my_bash_task = BashOperator(
task_id="my_bash_task",
bash_command=bash_command,
dag=my_dag)

bash_command = "/home/jak/my_projects/workflow_env/repo_workflow/db_backup_bash.sh ""

After this answer, I even gave a space after the bash file to avoid the TemplateNotFound error . But during the execution of this task, I gave this error: airflow.exceptions.AirflowException: bash failed to execute the command .

The contents of the bash_command file:

#!/bin/bash
DATABASE=db_name
FILE=$DATABASE-`date +%F-%H%M%S`.backup
export PGPASSWORD=password
pg_dump -h localhost -p 5432 -U developer -F c -b -v -f ~/Dropbox/database_backup/location/$FILE db_name
unset PGPASSWORD

However, instead of pointing the bash_ command to the bash file, writing the command in a multi-line line, it works:

bash_command = """
DATABASE=db_name
FILE=$DATABASE-`date +%F-%H%M%S`.backup
export PGPASSWORD=password
pg_dump -h localhost -p 5432 -U developer -F c -b -v -f ~/Dropbox/database_backup/location/$FILE db_name
unset PGPASSWORD
"""

Because of this, I assume that the error is not related to bash commands. I even tried replacing #! / Bin / bash in the bash file with #! / Bin / sh, this did not work either.

I ran sh db_back_up_bash.shfrom the terminator and it works great.

Update Actual Code:

bash_file_location_to_backup_db = '{{"/home/jak/my_projects/workflow_env/repo_workflow/db_backup_bash.sh"}}'
# bash_file_location_to_backup_db = "/home/jak/my_projects/workflow_env/repo_workflow/db_backup_bash.sh "
bash_command = """
DATABASE=ksaprice_scraping
FILE=$DATABASE-`date +%F-%H%M%S`.backup
export PGPASSWORD=password
pg_dump -h localhost -p 5432 -U developer -F c -b -v -f ~/Dropbox/database_backup/ksaprice/$FILE ksaprice_scraping
unset PGPASSWORD
"""

backup_scraped_db_in_dropbox_task = BashOperator(
    task_id="backup_scraped_db_in_dropbox_task",
    # bash_command=bash_command,# this works fine
    bash_command=bash_file_location_to_backup_db,#this give error :airflow.exceptions.AirflowException: Bash command failed
    dag=dag_crawl
)

:

[2017-04-11 20:02:14,905] {bash_operator.py:90} INFO - Output:
2017-04-11 20:02:14,905 | INFO| root : Output:
[2017-04-11 20:02:14,906] {bash_operator.py:94} INFO - /tmp/airflowtmp7FffJ2/backup_scraped_db_in_dropbox_taskQ6IVxm: line 1: /home/jak/my_projects/workflow_env/repo_workflow/db_backup_bash.sh: Permission denied
2017-04-11 20:02:14,906 | INFO| root : /tmp/airflowtmp7FffJ2/backup_scraped_db_in_dropbox_taskQ6IVxm: line 1: /home/jak/my_projects/workflow_env/repo_workflow/db_backup_bash.sh: Permission denied
[2017-04-11 20:02:14,906] {bash_operator.py:97} INFO - Command exited with return code 126
2017-04-11 20:02:14,906 | INFO| root : Command exited with return code 126
[2017-04-11 20:02:14,906] {models.py:1417} ERROR - Bash command failed
Traceback (most recent call last):
  File "/home/jak/my_projects/workflow_env/local/lib/python2.7/site-packages/airflow/models.py", line 1374, in run
    result = task_copy.execute(context=context)
  File "/home/jak/my_projects/workflow_env/local/lib/python2.7/site-packages/airflow/operators/bash_operator.py", line 100, in execute
    raise AirflowException("Bash command failed")
AirflowException: Bash command failed
2017-04-11 20:02:14,906 | ERROR| root : Bash command failed
Traceback (most recent call last):
  File "/home/jak/my_projects/workflow_env/local/lib/python2.7/site-packages/airflow/models.py", line 1374, in run
    result = task_copy.execute(context=context)
  File "/home/jak/my_projects/workflow_env/local/lib/python2.7/site-packages/airflow/operators/bash_operator.py", line 100, in execute
    raise AirflowException("Bash command failed")
AirflowException: Bash command failed
[2017-04-11 20:02:14,907] {models.py:1441} INFO - Marking task as FAILED.
2017-04-11 20:02:14,907 | INFO| root : Marking task as FAILED.
[2017-04-11 20:02:14,947] {models.py:1462} ERROR - Bash command failed
2017-04-11 20:02:14,947 | ERROR| root : Bash command failed
Traceback (most recent call last):
  File "/home/jak/my_projects/workflow_env/bin/airflow", line 28, in <module>
    args.func(args)
  File "/home/jak/my_projects/workflow_env/local/lib/python2.7/site-packages/airflow/bin/cli.py", line 585, in test
    ti.run(ignore_task_deps=True, ignore_ti_state=True, test_mode=True)
  File "/home/jak/my_projects/workflow_env/local/lib/python2.7/site-packages/airflow/utils/db.py", line 53, in wrapper
    result = func(*args, **kwargs)
  File "/home/jak/my_projects/workflow_env/local/lib/python2.7/site-packages/airflow/models.py", line 1374, in run
    result = task_copy.execute(context=context)
  File "/home/jak/my_projects/workflow_env/local/lib/python2.7/site-packages/airflow/operators/bash_operator.py", line 100, in execute
    raise AirflowException("Bash command failed")
airflow.exceptions.AirflowException: Bash command faile
+4
2

​​ , jinja , .sh BashOperator.

, , Jinja :

bash_command = '{{"/home/jak/my_projects/workflow_env/repo_workflow/db_backup_bash.sh"}}'

+3

bash, . , airflow .

bash_command="/root/airflow/test.sh "

, ...

0

Source: https://habr.com/ru/post/1674364/

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