Heroku Rake任务未运行Shell脚本

Question

I have this Rake task that works locally:

namespace :backup_to_s3 do
  task run: :environment do
    puts "Started S3 backup"
    # create .pgpass so we don't have to enter the password
    entry = "#{ENV['RDS_DB_HOSTNAME']}:*:*:#{ENV['RDS_DB_SUPER_USERNAME']}:#{ENV['RDS_DB_SUPER_PASSWORD']}"
    `echo '#{entry}' > ~/.pgpass;
    chmod 0600 ~/.pgpass;
    bash backup_to_s3.sh`
    puts "Finished S3 backup"
  end
end

Notice that it makes a call to run a shell script. Here's that shell script:

#!/bin/bash

backupTime=`date +%Y%m%d-%H:%M`
S3Bucket=$S3_BUCKET_NAME
RDSHostname=$RDS_DB_HOSTNAME
RDSUsername=$RDS_DB_SUPER_USERNAME
RDSDatabaseName=$RDS_DB_NAME

pg_dump -Fc ${RDSDatabaseName} -h ${RDSHostname} -U ${RDSUsername} --no-password | gzip -9 | \
s3cmd put - s3://${S3Bucket}/postgres.${RDSDatabaseName}.dump.${backupTime}.gz

Like I said this all works locally, and the puts logging statements work. On Heroku, the task runs, but the puts statements are executed immediately, seeming to indicate that the system calls and the shell script are not being run.

I'm confused as to why this isn't working!

UPDATE 7/15

I found that you can set the PGPASSWORD environment variable and avoid creating the .pgpass file. The Rake task is still not executing the shell script.

Answer 1

Heroku doesn't provide you with a traditional virtual private server, so I would not assume that you have access to write to the home directory. It's very likely that you might be getting a permission denied error when creating the .pgpass file.

Try placing your file in the relative tmp/ directory of your rails project instead.