checks to see if a service has been deployed to the cluster; if not, we install it.

verify-helm-install.sh

#!/usr/bin/env bash
#  PURPOSE: Given a repo and chart name this script will check to see if the
#           chart is installed, if not it installs the chart, else it will
#           display Helm deployment info.
# -----------------------------------------------------------------------------
#  PREREQS: a) Helm is installed
#           b) The target repo has been added
#           c)
# -----------------------------------------------------------------------------
#  EXECUTE:
# -----------------------------------------------------------------------------
#     TODO: 1)
#           2)
#           3)
# -----------------------------------------------------------------------------
#   AUTHOR: Todd E Thomas
# -----------------------------------------------------------------------------
#  CREATED: 2021/06/06
# -----------------------------------------------------------------------------
#set -x


###----------------------------------------------------------------------------
### VARIABLES
###----------------------------------------------------------------------------
# ENV Stuff
: "${1?  Wheres my first agument, bro!}"
myApp="$1"
myRepoName="$2"

# Data


###----------------------------------------------------------------------------
### FUNCTIONS
###----------------------------------------------------------------------------
function pMsg() {
    theMessage="$1"
    printf '%s\n' "$theMessage"
}

function installService() {
    helm upgrade -i "project-name" "${myRepoName}/${myApp}"
}

function checkService() {
    if ! kubectl wait --for=condition=ready pod \
        -l app.kubernetes.io/name="$myApp" --timeout=300s; then
        pMsg "service does not exist"
        return 1
    else
        pMsg "service already exists"
        return 0
    fi
}


###----------------------------------------------------------------------------
### MAIN PROGRAM
###----------------------------------------------------------------------------
### Check pre-condition
###---
if ! checkService "$myApp"; then
    pMsg "Installing Service..."
    installService
fi



###---
### REQ
###---
while false; do
    checkService "$myApp"
    pMsg "checkService"
done


###---
### fin~
###---
exit 0