Refactor Couchbase 2.5 Dockerfile and add entry scripts

Updated the Couchbase 2.5 Dockerfile to improve dependency management, add user setup, and enhance container process handling. Added entrypoint, runit, and dummy scripts to support containerized operation and port overrides. Updated README with new reference link.

couchbase-2.5/scripts/dummy.sh

@@ -0,0 +1,4 @@
+#!/bin/sh
+
+echo "Running in Docker container - $0 not available"
+

couchbase-2.5/scripts/entrypoint.sh

@@ -0,0 +1,59 @@
+#!/bin/bash
+set -e
+
+staticConfigFile=/opt/couchbase/etc/couchbase/static_config
+restPortValue=8091
+
+# see https://developer.couchbase.com/documentation/server/current/install/install-ports.html
+function overridePort() {
+    portName=$1
+    portNameUpper=$(echo $portName | awk '{print toupper($0)}')
+    portValue=${!portNameUpper}
+
+    # only override port if value available AND not already contained in static_config
+    if [ "$portValue" != "" ]; then
+        if grep -Fq "{${portName}," ${staticConfigFile}
+        then
+            echo "Don't override port ${portName} because already available in $staticConfigFile"
+        else
+            echo "Override port '$portName' with value '$portValue'"
+            echo "{$portName, $portValue}." >> ${staticConfigFile}
+
+            if [ ${portName} == "rest_port" ]; then
+                restPortValue=${portValue}
+            fi
+        fi
+    fi
+}
+
+overridePort "rest_port"
+overridePort "mccouch_port"
+overridePort "memcached_port"
+overridePort "query_port"
+overridePort "ssl_query_port"
+overridePort "fts_http_port"
+overridePort "moxi_port"
+overridePort "ssl_rest_port"
+overridePort "ssl_capi_port"
+overridePort "ssl_proxy_downstream_port"
+overridePort "ssl_proxy_upstream_port"
+
+
+[[ "$1" == "couchbase-server" ]] && {
+
+    if [ "$(whoami)" = "couchbase" ]; then
+        # Ensure that /opt/couchbase/var is owned by user 'couchbase' and
+        # is writable
+        if [ ! -w /opt/couchbase/var -o \
+            $(find /opt/couchbase/var -maxdepth 0 -printf '%u') != "couchbase" ]; then
+            echo "/opt/couchbase/var is not owned and writable by UID 1000"
+            echo "Aborting as Couchbase Server will likely not run"
+            exit 1
+        fi
+    fi
+    echo "Starting Couchbase Server -- Web UI available at http://<ip>:$restPortValue"
+    echo "and logs available in /opt/couchbase/var/lib/couchbase/logs"
+    exec /usr/sbin/runsvdir-start
+}
+
+exec "$@"

couchbase-2.5/scripts/run

@@ -0,0 +1,19 @@
+#!/bin/sh
+
+exec 2>&1
+
+# Create directories where couchbase stores its data
+cd /opt/couchbase
+mkdir -p var/lib/couchbase \
+         var/lib/couchbase/config \
+         var/lib/couchbase/data \
+         var/lib/couchbase/stats \
+         var/lib/couchbase/logs \
+         var/lib/moxi
+
+chown -R couchbase:couchbase var
+if [ $(whoami) = "couchbase" ]; then
+  exec /opt/couchbase/bin/couchbase-server -- -kernel global_enable_tracing false -noinput
+else
+  exec chpst -ucouchbase  /opt/couchbase/bin/couchbase-server -- -kernel global_enable_tracing false -noinput
+fi