target-group-functions

#!/bin/bash
#
# target-group-functions
#
# Load balancer target groups

target-groups() {

  # List EC2 ELBv2 target groups
  #
  #     $ target-groups
  #     bash-my-aws-nlb-tg  TCP   22   vpc-04636ebe5573f6f65  instance  bash-my-aws-nlb
  #     bash-my-aws-alb-tg  HTTP  443  vpc-04636ebe5573f6f65  instance  bash-my-aws-alb

  local tg_names=$(skim-stdin)
  local filters=$(__bma_read_filters $@)

  aws elbv2 describe-target-groups   \
    ${tg_names/#/'--names '}         \
    --output text                    \
    --query "
      TargetGroups[][
        TargetGroupName,
        Protocol,
        Port,
        VpcId,
        TargetType,
        join(' ', LoadBalancerArns[])
      ]" |
  sed 's,arn:[^/]*:loadbalancer/[^/]*/\([^/]*\)[^[:blank:]]*,\1,g' |
  grep -E -- "$filters" |
  LC_ALL=C sort -b |
    columnise
}

target-group-targets() {

  # List EC2 ELBv2 target group targets
  # Accepts Target Group names on stdin or as arguments
  #
  #     $ target-group-targets bash-my-aws-nlb-tg
  #     i-4e15ece1de1a3f869  443  healthy    bash-my-aws-nlb-tg
  #     i-89cefa9403373d7a5  443  unhealthy  bash-my-aws-nlb-tg

  local tg_names=$(skim-stdin "$@")

  [[ -z $tg_names ]] && __bma_usage "tg-name [tg-name]" && return 1

  for tg_name in $tg_names; do
    local tg_arn=$(aws elbv2 describe-target-groups \
      --names "$tg_name"                   \
      --output text                        \
      --query "
        TargetGroups[][
          TargetGroupArn
        ]
      ")
    aws elbv2 describe-target-health       \
      --target-group-arn "$tg_arn"         \
      --output text                        \
      --query "
        TargetHealthDescriptions[][
          Target.Id,
          Target.Port,
          TargetHealth.State,
          TargetHealth.Description,
          '${tg_name}'
        ]
      "
  done | columnise
}