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manage-redshift
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manage-redshift
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#!/bin/bash
#
# This script uses AWS API to create RedShift clusters and snapshots.
#
#----------------- list_snapshots() --------------------------------------------------
list_snapshots()
{
echo "List of snapshots..."
echo "---------------------"
echo ""
arr_snapshots=(`aws redshift describe-cluster-snapshots | grep SnapshotIdentifier | awk '{ print $2 }' | sed 's/"//g' `)
echo ${arr_snapshots[@]} | tr " " "\n" | nl
arr_snapshots_len=${#arr_snapshots[@]}
echo ""
}
#----------------- list_clusters() ---------------------------------------------------
list_clusters()
{
echo "List of clusters..."
echo "---------------------"
echo ""
arr_clusters=(`aws redshift describe-clusters | grep ClusterIdentifier | awk '{ print $2 }' | sed 's/,//' | sed 's/"//g' `)
echo ${arr_clusters[@]} | tr " " "\n" | nl
arr_clusters_len=${#arr_clusters[@]}
echo ""
}
#----------------- check_confirmation() -------------------------------------------
check_confirmation()
{
# this loop checks if nothing or empty/white string was inputted
while [ 1 ]
do
printf "Do you want to proceed? (y/n): "
read response
[ ! -z "$response" ] && break
done
[ "$response" == "n" ] && continue || [ "$response" != "y" ] && break
}
#-------------------------------------------------------------------------------------
main_menu()
{
echo "What would you like to do?"
echo "=========================="
echo ""
echo " (1) List clusters"
echo " (2) List snapshots"
echo " (3) Create cluster from snapshot"
echo " (4) Create snapshot from cluster (also deletes the cluster)"
echo " (5) Quit"
echo ""
}
#----------------- start main loop ---------------------------------------------------
clear
# Display snapshots and clusters
list_snapshots
list_clusters
# This loop runs continuously until user enters q to quit
while [ 1 ];
do
# Display menu choices
main_menu
# read user choice
printf "Choice: "
read input
echo ""
case "$input" in
(1) # display clusters
list_clusters
continue
;;
(2) # display snapshots
list_snapshots
continue
;;
(3) # Create cluster from snapshot
echo "You chose to create a cluster from a snapshot. Which snapshot do you want to use? Number: "
echo ""
list_snapshots
echo " b Back to main menu"
echo ""
printf "Which snapshot do you want to use to create a cluster? Number: "
read input
re='^[0-9qb]+$' # regular expression
while ! [[ $input =~ $re ]]
do
echo ""
echo "Not a valid choice. Please try again."
echo ""
echo ${arr_snapshots[@]} | tr " " "\n" | nl
echo ""
echo " b Back to main menu"
echo ""
printf "Which snapshot do you want to use to create a cluster? Number: "
read input
# if input contains a space, go back to top of while-loop
[[ $input = *[[:space:]]* ]] && continue
done
[ $input == "q" ] && echo "Goodbye" && exit
[ $input == "b" ] && continue
while [ $input -gt $arr_snapshots_len ] || [ $input -lt "1" ] || ! [[ $input =~ $re ]]
do
echo ""
echo "Not a valid choice. Please try again."
echo ""
echo ${arr_snapshots[@]} | tr " " "\n" | nl
echo ""
echo " b Back to main menu"
echo ""
printf "Which snapshot do you want to use to create a cluster? Number: "
read input
done
choice=`expr $input - 1`
snapshot_choice=${arr_snapshots[${choice}]}
echo "You chose "$snapshot_choice
echo ""
# if user hits return without typing anything, re-ask question.
while [ 1 ]
do
printf "Please enter cluster name: "
read cluster_name
# replace any spaces with dash
cluster_name=`echo $cluster_name | sed 's/ /-/g'`
[ ! -z "$cluster_name" ] && break
done
cmd="aws redshift restore-from-cluster-snapshot --cluster-identifier $cluster_name --snapshot-identifier $snapshot_choice"
echo "About to execute the following command:"
echo ""
echo $cmd
echo ""
# confirm to continue
check_confirmation
echo "Creating cluster: $cluster_name. Please wait. This will take some time..."
eval $cmd
echo ""
# display message again after json ouput
echo "Creating cluster: $cluster_name. Please wait. This will take some time..."
# check when cluster creation is done. Echo out running counter to show progress.
count=0
while [ 1 ]
do
aws redshift describe-clusters --cluster-identifier $cluster_name | grep ClusterStatus | grep available > /dev/null
if [ $? -eq 0 ]
then
break
fi
count=`expr $count + 1`
printf "$count "
sleep 2
done
echo ""
echo "Cluster $cluster_name created."
echo ""
# show list of clusters. It will now include new cluster.
list_clusters
continue
;;
(4) # Create snapshot from cluster
echo "You chose to create snapshot from a cluster. Which cluster do you want to use? Number: "
echo ""
list_clusters
echo " b Back to main menu"
echo ""
printf "Which cluster do you want to use to create a snapshot? Number: "
read input
re='^[0-9qb]+$' # regular expression
while ! [[ $input =~ $re ]]
do
echo ""
echo "Not a valid choice. Please try again."
echo ""
echo ${arr_clusters[@]} | tr " " "\n" | nl
echo ""
echo " b Back to main menu"
echo ""
echo ""
printf "Which cluster do you want to use to create a snapshot? Number: "
read input
# if input contains a space, go back to top of while-loop
[[ $input = *[[:space:]]* ]] && continue
done
[ $input == "q" ] && echo "Goodbye" && exit
[ $input == "b" ] && continue
while [ $input -gt $arr_clusters_len ] || [ $input -lt "1" ] || ! [[ $input =~ $re ]]
do
#echo "There are only $arr_clusters_len clusters. Please choose again."
echo ""
echo "Not a valid choice. Please try again."
echo ""
echo ${arr_clusters[@]} | tr " " "\n" | nl
echo ""
echo " b Back to main menu"
echo ""
printf "Which cluster do you want to use to create a snapshot? Number: "
read input
done
choice=`expr $input - 1`
cluster_choice=${arr_clusters[${choice}]}
echo "You chose "$cluster_choice
echo ""
# if user hits return without typing anything, re-ask question.
while [ 1 ]
do
printf "Please enter snapshot name: "
read snapshot_name
# replace any spaces with dash
snapshot_name=`echo $snapshot_name | sed 's/ /-/g'`
[ ! -z "$snapshot_name" ] && break
done
timestamp=`date +'%Y%m%d-%H%M'`
cmd="aws redshift delete-cluster --cluster-identifier $cluster_choice --final-cluster-snapshot-identifier $snapshot_name-$timestamp"
echo "About to execute the following command:"
echo ""
echo $cmd
echo ""
# confirm to continue
check_confirmation
echo "Creating snapshot: $snapshot_name-$timestamp. Please wait. This will take some time..."
eval $cmd
echo ""
# display message again after json ouput
echo "Creating snapshot: $snapshot_name-$timestamp. Please wait. This will take some time..."
# check when snapshot creation is done. Echo out running counter to show progress.
count=0
while [ 1 ]
do
aws redshift describe-cluster-snapshots --snapshot-identifier $snapshot_name-$timestamp | grep Status | grep available > /dev/null
if [ $? -eq 0 ]
then
break
fi
count=`expr $count + 1`
printf "$count "
sleep 2
done
echo ""
echo "Snapshot $snapshot_name-$timestamp created."
echo ""
# show list of snapshots. It will now include new cluster.
list_snapshots
continue
;;
([q5])
echo "Goodbye"
break
;;
esac
done