ab-nginx/ab-nginx.sh
2021-01-06 02:35:29 -07:00

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#!/bin/sh
#
### start ab-nginx container using params file variables
#
# text formatting presets
if command -v tput >/dev/null; then
cyan=$(tput bold)$(tput setaf 6)
err=$(tput bold)$(tput setaf 1)
magenta=$(tput sgr0)$(tput setaf 5)
norm=$(tput sgr0)
yellow=$(tput sgr0)$(tput setaf 3)
width=$(tput cols)
else
cyan=''
err=''
magenta=''
norm=''
yellow=''
width=80
fi
### parameter defaults
shell=false
container_name="ab-nginx"
NETWORK='nginx_network'
SUBNET='172.31.254.0/24'
HTTP_PORT=80
HTTPS_PORT=443
unset CONFIG_DIR
unset SERVERS_DIR
unset WEBROOT_DIR
unset vmount
### functions
checkExist() {
if [ "$1" = 'file' ]; then
if [ ! -f "$2" ]; then
printf "%s\nCannot find file: '$2'. Exiting.\n%s" "$err" "$norm"
exit 3
fi
elif [ "$1" = 'dir' ]; then
if [ ! -d "$2" ]; then
printf "%s\nCannot find directory: '$2'. Exiting.\n$%s" "$err" "$norm"
exit 3
fi
fi
return 0
}
scriptHelp() {
printf "\n%s%1000s\n" "$magenta" | tr " " "-" | cut -c -$width
printf "%s" "$norm"
textblock "This is a simple helper script so you can avoid lengthy typing when working with the nginx container. The script reads the contents of 'ab-nginx.params' and constructs various 'docker run' commands based on that file. The biggest time-saver is working with certificates. If they are specified in the params file, the script will automatically bind-mount them so nginx serves content via SSL by default."
newline
textblock "If you run the script with no parameters, it will execute the container 'normally': Run in detached mode with nginx automatically launched and logging to stdout. If you specified certificates, nginx will serve over SSL by default."
newline
textblock "Note: Containers (except shell) are always set to restart 'unless-stopped'. You must remove them manually if desired."
printf "%s" "$magenta"
newline
textblock "The script has the following parameters:"
textblockParam 'parameter in cyan' 'default in yellow'
newline
textblockParam '-n|--name' 'ab-nginx'
textblock "Change the name of the container. This is cosmetic and does not affect operation in any way."
newline
textblockParam '-s|--shell' 'off: run in detached mode'
textblock "Enter the container using an interactive POSIX shell. This happens after startup operations but *before* nginx is actually started. This is a great way to see configuration changes possibly stopping nginx from starting normally."
printf "%s" "$yellow"
newline
textblock "More information can be found at: https://git.asifbacchus.app/ab-docker/ab-nginx/wiki"
printf "%s%1000s\n" "$magenta" | tr " " "-" | cut -c -$width
exit 0
}
newline() {
printf "\n"
}
textblock() {
printf "%s\n" "$1" | fold -w "$width" -s
}
textblockParam() {
if [ -z "$2" ]; then
# no default
printf "%s%s%s\n" "$cyan" "$1" "$norm"
else
# default param provided
printf "%s%s %s(%s)%s\n" "$cyan" "$1" "$yellow" "$2" "$norm"
fi
}
### pre-requisite checks
# is docker installed?
if ! command -v docker > /dev/null; then
printf "%s\nCannot find docker... is it installed?\n%s" "$err" "$norm"
exit 2
fi
# is user root or in the docker group?
if [ ! "$(id -u)" -eq 0 ]; then
if ! id -Gn | grep docker >/dev/null; then
printf "%s\nYou must either be root or in the 'docker' group to run this script since you must be able to actually start the container! Exiting.\n$%s" "$err" "$norm"
exit 2
fi
fi
# does the params file exist?
checkExist 'file' './ab-nginx.params'
# read .params file
. "./ab-nginx.params"
# fix case of TLS13_ONLY var
if [ "$TLS13_ONLY" ]; then
TLS13_ONLY=$(printf "%s" "$TLS13_ONLY" | tr "[:lower:]" "[:upper:]")
fi
# check for certs if using SSL
if [ "$SSL_CERT" ]; then checkExist 'file' "$SSL_CERT"; fi
if [ "$SSL_KEY" ]; then checkExist 'file' "$SSL_KEY"; fi
if [ "$SSL_CHAIN" ]; then checkExist 'file' "$SSL_CHAIN"; fi
# check for DHparam if using TLS1.2
if [ "$SSL_CERT" ] && [ "$TLS13_ONLY" = 'FALSE' ]; then
if [ -z "$DH" ]; then
printf "%s\nA DHparam file must be specified when using TLS 1.2. Exiting.%s\n" "$err" "$norm"
exit 5
else
checkExist 'file' "$DH"
fi
fi
# check if specified config directory exists
if [ "$CONFIG_DIR" ]; then
checkExist 'dir' "$CONFIG_DIR"
fi
# check if specified server-block directory exists
if [ "$SERVERS_DIR" ]; then
checkExist 'dir' "$SERVERS_DIR"
fi
# check if specified webroot directory exists
if [ "$WEBROOT_DIR" ]; then
checkExist 'dir' "$WEBROOT_DIR"
fi
# set up volume mounts
if [ "$CONFIG_DIR" ]; then
vmount="$vmount -v $CONFIG_DIR:/etc/nginx/config"
fi
if [ "$SERVERS_DIR" ]; then
vmount="$vmount -v $SERVERS_DIR:/etc/nginx/sites"
fi
if [ "$SNIPPETS_DIR" ]; then
vmount="$vmount -v $SNIPPETS_DIR:/etc/nginx/snippets"
fi
if [ "$WEBROOT_DIR" ]; then
vmount="$vmount -v $WEBROOT_DIR:/usr/share/nginx/html"
fi
# trim leading whitespace
vmount=${vmount##[[:space:]]}
# handle null HOSTNAMES
if [ -z "$HOSTNAMES" ]; then HOSTNAMES="_"; fi
# process startup parameters
while [ $# -gt 0 ]; do
case "$1" in
-h | -\? | --help)
# display help
scriptHelp
exit 0
;;
-s | --shell)
# start shell instead of default CMD
shell=true
;;
-n | --name)
# container name
if [ -z "$2" ]; then
printf "%s\nNo container name specified. Exiting.\n%s" "$err" "$norm"
exit 1
fi
container_name="$2"
shift
;;
*)
printf "%s\nUnknown option: %s\n" "$err" "$1"
printf "Use '--help' for valid options.\n\n%s" "$norm"
exit 1
;;
esac
shift
done
# create network if it doesn't already exist
docker network inspect ${NETWORK} >/dev/null 2>&1 ||
docker network create \
--attachable \
--driver=bridge \
--subnet=${SUBNET} \
${NETWORK}
# run without TLS
if [ -z "$SSL_CERT" ]; then
if [ $shell = 'true' ]; then
# exec shell
printf "%s\nRunning SHELL on %s...%s\n" "$cyan" "$container_name" "$norm"
docker run --rm -it --name "${container_name}" \
--env-file ab-nginx.params \
-e SERVER_NAMES="$HOSTNAMES" \
$vmount \
--network=${NETWORK} \
-p ${HTTP_PORT}:80 \
docker.asifbacchus.app/nginx/ab-nginx:latest /bin/sh
else
# exec normally
printf "%s\nRunning NGINX on %s...%s\n" "$cyan" "$container_name" "$norm"
docker run -d --name "${container_name}" \
--env-file ab-nginx.params \
-e SERVER_NAMES="$HOSTNAMES" \
$vmount \
--network=${NETWORK} \
-p ${HTTP_PORT}:80 \
--restart unless-stopped \
docker.asifbacchus.app/nginx/ab-nginx:latest
fi
# run with TLS1.2
elif [ "$SSL_CERT" ] && [ "$TLS13_ONLY" = 'FALSE' ]; then
if [ $shell = 'true' ]; then
# exec shell
printf "%s\nRunning SHELL on %s (TLS 1.2)...%s\n" "$cyan" "$container_name" "$norm"
docker run --rm -it --name "${container_name}" \
--env-file ab-nginx.params \
-e SERVER_NAMES="$HOSTNAMES" \
$vmount \
--network=${NETWORK} \
-v "$SSL_CERT":/certs/fullchain.pem:ro \
-v "$SSL_KEY":/certs/privkey.pem:ro \
-v "$SSL_CHAIN":/certs/chain.pem:ro \
-v "$DH":/certs/dhparam.pem:ro \
-p ${HTTP_PORT}:80 -p ${HTTPS_PORT}:443 \
docker.asifbacchus.app/nginx/ab-nginx:latest /bin/sh
else
# exec normally
printf "%s\nRunning NGINX on %s (TLS 1.2)...%s\n" "$cyan" "$container_name" "$norm"
docker run -d --name "${container_name}" \
--env-file ab-nginx.params \
-e SERVER_NAMES="$HOSTNAMES" \
$vmount \
--network=${NETWORK} \
-v "$SSL_CERT":/certs/fullchain.pem:ro \
-v "$SSL_KEY":/certs/privkey.pem:ro \
-v "$SSL_CHAIN":/certs/chain.pem:ro \
-v "$DH":/certs/dhparam.pem:ro \
-p ${HTTP_PORT}:80 -p ${HTTPS_PORT}:443 \
--restart unless-stopped \
docker.asifbacchus.app/nginx/ab-nginx:latest
fi
# run with TLS1.3
elif [ "$SSL_CERT" ] && [ "$TLS13_ONLY" = 'TRUE' ]; then
if [ $shell = 'true' ]; then
# exec shell
printf "%s\nRunning SHELL on %s (TLS 1.3)...%s\n" "$cyan" "$container_name" "$norm"
docker run --rm -it --name "${container_name}" \
--env-file ab-nginx.params \
-e SERVER_NAMES="$HOSTNAMES" \
$vmount \
--network=${NETWORK} \
-v "$SSL_CERT":/certs/fullchain.pem:ro \
-v "$SSL_KEY":/certs/privkey.pem:ro \
-v "$SSL_CHAIN":/certs/chain.pem:ro \
-p ${HTTP_PORT}:80 -p ${HTTPS_PORT}:443 \
docker.asifbacchus.app/nginx/ab-nginx:latest /bin/sh
else
# exec normally
printf "%s\nRunning NGINX on %s (TLS 1.3)...%s\n" "$cyan" "$container_name" "$norm"
docker run -d --name "${container_name}" \
--env-file ab-nginx.params \
-e SERVER_NAMES="$HOSTNAMES" \
$vmount \
--network=${NETWORK} \
-v "$SSL_CERT":/certs/fullchain.pem:ro \
-v "$SSL_KEY":/certs/privkey.pem:ro \
-v "$SSL_CHAIN":/certs/chain.pem:ro \
-p ${HTTP_PORT}:80 -p ${HTTPS_PORT}:443 \
--restart unless-stopped \
docker.asifbacchus.app/nginx/ab-nginx:latest
fi
fi
### exit gracefully
exit 0