refactor(helpers): echo docker run result code on exit

- add internal name label to allow finding containers
- use new domain in private labels

build/Dockerfile

@@ -47,6 +47,7 @@ HEALTHCHECK \
 # standardized labels
 MAINTAINER Asif Bacchus <asif@bacchus.cloud>
 LABEL maintainer="Asif Bacchus <asif@bacchus.cloud>"
+LABEL dev.asifbacchus.docker.internalName="ab-nginx"
 LABEL org.opencontainers.image.author="Asif Bacchus <asif@bacchus.cloud>"
 LABEL org.opencontainers.image.url="https://git.asifbacchus.dev/ab-docker/ab-nginx"
 LABEL org.opencontainers.image.documentation="https://git.asifbacchus.dev/ab-docker/ab-nginx/wiki"
@@ -102,7 +103,7 @@ ARG GIT_COMMIT
 ARG INTERNAL_VERSION
 LABEL org.opencontainers.image.revision=${GIT_COMMIT}
 LABEL org.opencontainers.image.version=${NGINX_VERSION}
-LABEL app.asifbacchus.docker.internalVersion=${INTERNAL_VERSION}-${NGINX_VERSION}
+LABEL dev.asifbacchus.docker.internalVersion=${INTERNAL_VERSION}-${NGINX_VERSION}
 LABEL org.opencontainers.image.created=${BUILD_DATE}
 
 #EOF

helpers/ab-nginx.sh

@@ -4,8 +4,7 @@
 # start ab-nginx container using params file variables
 #
 
-# TODO: add stop & stop and remove commands
-
+#
 # text formatting presets
 if command -v tput >/dev/null; then
     cyan=$(tput bold)$(tput setaf 6)
@@ -23,56 +22,78 @@ else
     width=80
 fi
 
-### parameter defaults
+#
+# parameter defaults
 doShell=false
+doStatus=false
+doStop=false
+removeStopped=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
+CONFIG_DIR=""
+SERVERS_DIR=""
+WEBROOT_DIR=""
+volumeMounts=""
+stopErr=0
+removeErr=0
 
+#
+# functions
 checkExist() {
     if [ "$1" = 'file' ]; then
         if [ ! -f "$2" ]; then
             printf "%s\nCannot find file: '$2'. Exiting.\n%s" "$err" "$norm"
-            exit 3
+            exit 1
         fi
     elif [ "$1" = 'dir' ]; then
         if [ ! -d "$2" ]; then
             printf "%s\nCannot find directory: '$2'. Exiting.\n$%s" "$err" "$norm"
-            exit 3
+            exit 1
         fi
     fi
     return 0
 }
 
 scriptHelp() {
+    # header and description
     printf "\n%s" "$magenta"
     printf '%.0s-' $(seq "$width")
     printf "\n%s" "$norm"
     textBlock "This is a simple helper script so you can avoid typing lengthy commands when working with the ab-nginx container."
     textBlock "The script reads the contents of 'ab-nginx.params' and constructs various 'docker run' commands based on that file. The biggest time-saver is working with certificates. If they are specified in the params file, the script will automatically bind-mount them so nginx serves content via SSL by default."
     newline
+
+    # explanatory text
     textBlock "If you run the script with no parameters, it will execute the container 'normally': Run in detached mode with nginx automatically launched. If you specified certificates, nginx will serve over SSL by default."
     textBlock "Note: Containers (except shell) are always set to restart 'unless-stopped'. You must remove them manually if desired."
     printf "%s" "$magenta"
     newline
+
+    # parameters
     textBlock "The script has the following (optional) parameters:"
     textBlockParam 'parameter in cyan' 'default in yellow'
     newline
     textBlockParam '-n|--name' 'ab-nginx'
     textBlock "Set the name of the container, otherwise the default will be used."
     newline
-    textBlockParam'-s|--shell' 'off: run in detached mode'
+    textBlockParam '-s|--shell' 'off: run in detached mode'
     textBlock "Enter the container using an interactive ASH/BusyBox 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" "$yellow"
     newline
+    textBlockParam '--status'
+    textBlock "Run a search for all AB-NGINX containers and display their name and status."
+    newline
+    textBlockParam '--stop'
+    textBlock "Stops the container specified by the '--name' parameter or with the default name 'ab-nginx'."
+    newline
+    textBlockParam '--remove | --stop-remove'
+    textBlock "Stops and removes the container specified by the '--name' parameter or with the default name 'ab-nginx'."
+
+    # footer
+    newline
+    printf "%s" "$yellow"
     textBlock"More information can be found at: https://git.asifbacchus.dev/ab-docker/ab-nginx/wiki"
     printf "\n%s" "$magenta"
     printf '%.0s-' $(seq "$width")
@@ -98,7 +119,8 @@ textBlockParam() {
     fi
 }
 
-### pre-requisite checks
+#
+# pre-requisite checks
 
 # is docker installed?
 if ! command -v docker >/dev/null; then
@@ -110,10 +132,101 @@ fi
 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
+        exit 3
     fi
 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
+        doShell=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="$2"
+        shift
+        ;;
+    --status)
+        # find containers and check their status
+        doStatus=true
+        ;;
+    --stop)
+        # stop named container
+        doStop=true
+        ;;
+    --remove | --stop-remove)
+        # stop and remove named container
+        doStop=true
+        removeStopped=true
+        ;;
+    *)
+        printf "%s\nUnknown option: %s\n" "$err" "$1"
+        printf "Use '--help' for valid options.\n\n%s" "$norm"
+        exit 1
+        ;;
+    esac
+    shift
+done
+
+#
+# status check
+if [ "$doStatus" = "true" ]; then
+    printf "\nFound the following AB-NGINX containers:\n"
+    docker ps -a --filter "label=dev.asifbacchus.docker.internalName=ab-nginx"
+    printf "\n"
+    exit 0
+fi
+
+#
+# stop container
+if [ "$doStop" = "true" ]; then
+    printf "\nStopping container '%s'... " "$container_name"
+
+    # ensure container exists
+    if ! docker inspect "$container_name" >/dev/null 2>&1; then
+        printf "[ERROR]: No container with that name found.\n\n"
+        exit 11
+    fi
+
+    # stop and/or remove container
+    if ! docker stop "$container_name" >/dev/null 2>&1; then stopErr=1; fi
+    if [ "$removeStopped" = "true" ] && [ "$stopErr" -eq 0 ]; then
+        if ! docker rm "$container_name" >/dev/null 2>&1; then removeErr=1; fi
+    fi
+
+    # update status message
+    if [ "$stopErr" -eq 1 ]; then
+        printf "[ERROR]: Unable to stop container. Please try removing it manually.\n\n"
+        exit 12
+    fi
+    if [ "$removeErr" -eq 1 ]; then
+        printf "[STOPPED]\n"
+        printf "[ERROR]: Unable to remove container. Please try removing it manually.\n\n"
+        exit 13
+    fi
+    if [ "$removeStopped" = "true" ]; then
+        printf "[REMOVED]\n\n"
+    else
+        printf "[STOPPED]\n\n"
+    fi
+    exit 0
+fi
+
+#
+# run container
+
 # does the params file exist?
 checkExist 'file' './ab-nginx.params'
 
@@ -147,53 +260,23 @@ fi
 
 # set up volume mounts
 if [ "$CONFIG_DIR" ]; then
-    vmount="$vmount -v $CONFIG_DIR:/etc/nginx/config"
+    volumeMounts="${volumeMounts} -v $CONFIG_DIR:/etc/nginx/config"
 fi
 if [ "$SERVERS_DIR" ]; then
-    vmount="$vmount -v $SERVERS_DIR:/etc/nginx/sites"
+    volumeMounts="${volumeMounts} -v $SERVERS_DIR:/etc/nginx/sites"
 fi
 if [ "$SNIPPETS_DIR" ]; then
-    vmount="$vmount -v $SNIPPETS_DIR:/etc/nginx/snippets"
+    volumeMounts="${volumeMounts} -v $SNIPPETS_DIR:/etc/nginx/snippets"
 fi
 if [ "$WEBROOT_DIR" ]; then
-    vmount="$vmount -v $WEBROOT_DIR:/usr/share/nginx/html"
+    volumeMounts="${volumeMounts} -v $WEBROOT_DIR:/usr/share/nginx/html"
 fi
 # trim leading whitespace
-vmount=${vmount##[[:space:]]}
+volumeMounts=${volumeMounts##[[: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
-        doShell=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 ${NETWORK} >/dev/null 2>&1 ||
     docker network create \
@@ -212,7 +295,7 @@ if [ -z "$SSL_CERT" ]; then
             --env-file ab-nginx.params \
             --user="${NGINX_UID:-8080}:${NGINX_GID:-8080}" \
             -e SERVER_NAMES="$HOSTNAMES" \
-            $vmount \
+            ${volumeMounts} \
             --network=${NETWORK} \
             -p ${HTTP_PORT}:80 \
             docker.asifbacchus.dev/nginx/ab-nginx:latest /bin/sh
@@ -224,7 +307,7 @@ if [ -z "$SSL_CERT" ]; then
             --env-file ab-nginx.params \
             --user="${NGINX_UID:-8080}:${NGINX_GID:-8080}" \
             -e SERVER_NAMES="$HOSTNAMES" \
-            $vmount \
+            ${volumeMounts} \
             --network=${NETWORK} \
             -p ${HTTP_PORT}:80 \
             --restart unless-stopped \
@@ -243,7 +326,7 @@ else
             --env-file ab-nginx.params \
             --user="${NGINX_UID:-8080}:${NGINX_GID:-8080}" \
             -e SERVER_NAMES="$HOSTNAMES" \
-            $vmount \
+            ${volumeMounts} \
             --network=${NETWORK} \
             -v "$SSL_CERT":/certs/fullchain.pem:ro \
             -v "$SSL_KEY":/certs/privkey.pem:ro \
@@ -261,7 +344,7 @@ else
             --env-file ab-nginx.params \
             --user="${NGINX_UID:-8080}:${NGINX_GID:-8080}" \
             -e SERVER_NAMES="$HOSTNAMES" \
-            $vmount \
+            ${volumeMounts} \
             --network=${NETWORK} \
             -v "$SSL_CERT":/certs/fullchain.pem:ro \
             -v "$SSL_KEY":/certs/privkey.pem:ro \
@@ -272,5 +355,20 @@ else
     fi
 fi
 
-### exit gracefully
-exit 0
+#
+# exit with code from docker
+exit "$?"
+
+#
+# exit return codes
+# 0:        normal exit, no errors
+# 1:        missing or invalid parameter
+# 2:        cannot find docker
+# 3:        incorrect permissions to access docker
+# 1x:       operation errors
+#   11      no container found with specified name
+#   12      unable to stop container
+#   13      unable to remove container
+# other     refer to docker exit codes
+
+#EOF