lsi: Tabular list of AWS EC2 instances (replaces awless ls instances)

lsi

#!/bin/bash -e

COLUMNS=8
SCRIPT_DIR="$(dirname "$(realpath "${BASH_SOURCE[0]}")")"


# https://github.com/jakobwesthoff/prettytable.sh
if [ ! -s "$SCRIPT_DIR/prettytable.sh" ] ; then
    # execute in a subshell so wget’s output isn’t fed into the printed table
    $(wget -O "$SCRIPT_DIR/prettytable.sh" https://github.com/jakobwesthoff/prettytable.sh/raw/master/prettytable.sh)
fi

. "$SCRIPT_DIR/prettytable.sh"


humanize_uptime () {
    # FIXME: honor columns variable
    awk -v FS='\t' '
    {
        printf "%s", substr($0, 0, length($0) - length($8))

        if ($8 < 2) {
            printf "1 sec"
        } else if ($8 < 120) {
            printf "%s secs", int($8)
        } else if ($8 < 3600) {
            printf "%s mins", int($8 / 60)
        } else if ($8 < 7200) {
            printf "1 hour"
        } else if ($8 < 86400) {
            printf "%s hours", int($8 / 3600)
        } else if ($8 < 1209600) { /* 2 weeks in seconds */
            printf "%s days", int($8 / 86400)
        } else if ($8 < 4838400) { /* 8 weeks in seconds */
            printf "%s weeks", int($8 / 604800)
        } else if ($8 < 60480000) { /* 100 weeks in seconds */
            printf "%s months", int($8 / 2419200)
        } else {
            printf "%s years", int($8 / 31557600)
        }

        printf "\n"
    }
    '
}

header="ID ▲\tZONE\tNAME\tSTATE\tTYPE\tPUBLIC IP\tPRIVATE IP\tUPTIME"
instance_data=$(aws ec2 describe-instances --query Reservations[].Instances[])

instances=$(echo "$instance_data" |
    jq -r '
        .[]
        | [
            .InstanceId,
            .Placement.AvailabilityZone,
            (.Tags[]|select(.Key == "Name")).Value // "—",
            .State.Name,
            .InstanceType,
            .PublicIpAddress,
            .PrivateIpAddress,
            (now - (.LaunchTime | strptime("%Y-%m-%dT%H:%M:%S+00:00") | mktime))
          ]
        | @tsv' \
    | sort \
    | humanize_uptime
)

out=$(
    echo -e "$header\n$instances" \
    | prettytable ${COLUMNS} \
    | egrep -v '^(┌|└)' \
    | sed 's/running/\\e[32mrunning\\e[0m/;s/stopped/\\e[31mstopped\\e[0m/'
    # ^^^ quick & dirty colorizer; make better!
)

echo -e "$out"

Sample output: