ambari-server upgrade + how to automate the question - have made a backup of the Ambari Server database

[#1]

how to automate the question ( we need to set it as always yes )

 - have made a backup of the Ambari Server database [y/n] (y)

when performing ambari-server upgrade

we need to automate this because we use the ambari-server upgrade in bash script

ambari-server upgrade

Using python  /usr/bin/pythonUpgrading ambari-serverINFO: Upgrade Ambari ServerINFO: Updating Ambari Server properties in ambari.properties
...WARNING: Can not find ambari.properties.rpmsave file from
previous version, skipping import of settingsINFO: Updating Ambari Server properties in ambari-env.sh ...INFO: Can not find ambari-env.sh.rpmsave file from previous
version, skipping restore of environment settings. ambari-env.sh may not
include any user customization.INFO: Fixing database objects ownerAmbari Server configured for Embedded Postgres. Confirm you


have made a backup of the Ambari Server database [y/n] (y)?

INFO: Upgrading database schemaINFO: Return code from schema upgrade command, retcode = 0INFO: Console output from schema upgrade command:INFO: {"lzo_enabled":"false"}INFO: Schema upgrade completedAdjusting ambari-server permissions and ownership...Ambari Server 'upgrade' completed successfully.

[#2 · Accepted solution]

@Michael Bronson

You can use "expect" utility offered by Linux as following:
1. Install that package:

# yum install expect -y 

2. Create a file as following as "/tmp/test.sh"

#!/usr/bin/expect 
set timeout 20
spawn /usr/sbin/ambari-server upgrade
expect "Ambari Server configured for Postgres. Confirm you have made a backup of the Ambari Server database" { send "y\n" }
interact

Notice i am passing "y". here { send "y\n" } which means it will take my input as "yes"

3. Give execute permission to the script and then run it

# chmod 755 /tmp/test.sh
# /tmp/test.sh

OUTPUT:
---------

# /tmp/test.sh 
spawn /usr/sbin/ambari-server upgrade
Using python  /usr/bin/python
Upgrading ambari-server
INFO: Upgrade Ambari Server
INFO: Updating Ambari Server properties in ambari.properties ...
WARNING: Can not find ambari.properties.rpmsave file from previous version, skipping import of settings
INFO: Updating Ambari Server properties in ambari-env.sh ...
INFO: Can not find ambari-env.sh.rpmsave file from previous version, skipping restore of environment settings. ambari-env.sh may not include any user customization.
INFO: Fixing database objects owner
Ambari Server configured for Postgres. Confirm you have made a backup of the Ambari Server database [y/n] (y)? y
INFO: Upgrading database schema
INFO: Return code from schema upgrade command, retcode = 0
INFO: Schema upgrade completed
Adjusting ambari-server permissions and ownership...
Ambari Server 'upgrade' completed successfully.

Notice i am passing "y". here { send "y\n" } which means it will take my input as "yes"

.

[#3]

You could make use of option "-s" or "--silent",

like in

ambari-server upgrade -s