Remove SysV init support (#51716)

With the removal of support for older OSes, we no longer have any
supported systems which use SysV init. This commit removes support for
that legacy init system.

relates #51480

distribution/packages/build.gradle

@@ -253,14 +253,6 @@ Closure commonPackageConfig(String type, boolean oss, boolean jdk, String archit
       fileMode 0755
     }
 
-    // ========= sysV init =========
-    configurationFile '/etc/init.d/elasticsearch'
-    into('/etc/init.d') {
-      fileMode 0750
-      fileType CONFIG | NOREPLACE
-      from "${packagingFiles}/init.d/elasticsearch"
-    }
-
     // ========= empty dirs =========
     // NOTE: these are created under packagingFiles as empty, but the permissions are set here
     Closure copyEmptyDir = { path, u, g, mode ->

distribution/packages/src/common/env/elasticsearch

@@ -20,33 +20,3 @@ ES_PATH_CONF=${path.conf}
 
 # Configure restart on package upgrade (true, every other setting will lead to not restarting)
 #RESTART_ON_UPGRADE=true
-
-################################
-# Elasticsearch service
-################################
-
-# SysV init.d
-#
-# The number of seconds to wait before checking if Elasticsearch started successfully as a daemon process
-ES_STARTUP_SLEEP_TIME=5
-
-################################
-# System properties
-################################
-
-# Specifies the maximum file descriptor number that can be opened by this process
-# When using Systemd, this setting is ignored and the LimitNOFILE defined in
-# /usr/lib/systemd/system/elasticsearch.service takes precedence
-#MAX_OPEN_FILES=65535
-
-# The maximum number of bytes of memory that may be locked into RAM
-# Set to "unlimited" if you use the 'bootstrap.memory_lock: true' option
-# in elasticsearch.yml.
-# When using systemd, LimitMEMLOCK must be set in a unit file such as
-# /etc/systemd/system/elasticsearch.service.d/override.conf.
-#MAX_LOCKED_MEMORY=unlimited
-
-# Maximum number of VMA (Virtual Memory Areas) a process can own
-# When using Systemd, this setting is ignored and the 'vm.max_map_count'
-# property is set at boot time in /usr/lib/sysctl.d/elasticsearch.conf
-#MAX_MAP_COUNT=262144

distribution/packages/src/common/scripts/postinst

@@ -62,40 +62,13 @@ if [ "x$IS_UPGRADE" != "xtrue" ]; then
         echo " sudo systemctl enable elasticsearch.service"
         echo "### You can start elasticsearch service by executing"
         echo " sudo systemctl start elasticsearch.service"
-
-    elif command -v chkconfig >/dev/null; then
-        echo "### NOT starting on installation, please execute the following statements to configure elasticsearch service to start automatically using chkconfig"
-        echo " sudo chkconfig --add elasticsearch"
-        echo "### You can start elasticsearch service by executing"
-        echo " sudo service elasticsearch start"
-
-    elif command -v update-rc.d >/dev/null; then
-        echo "### NOT starting on installation, please execute the following statements to configure elasticsearch service to start automatically using chkconfig"
-        echo " sudo update-rc.d elasticsearch defaults 95 10"
-        echo "### You can start elasticsearch service by executing"
-        echo " sudo /etc/init.d/elasticsearch start"
     fi
 elif [ "$RESTART_ON_UPGRADE" = "true" ]; then
 
     echo -n "Restarting elasticsearch service..."
     if command -v systemctl >/dev/null; then
         systemctl daemon-reload
         systemctl restart elasticsearch.service || true
-
-    elif [ -x /etc/init.d/elasticsearch ]; then
-        if command -v invoke-rc.d >/dev/null; then
-            invoke-rc.d elasticsearch stop || true
-            invoke-rc.d elasticsearch start || true
-        else
-            /etc/init.d/elasticsearch restart || true
-        fi
-
-    # older suse linux distributions do not ship with systemd
-    # but do not have an /etc/init.d/ directory
-    # this tries to start the elasticsearch service on these
-    # as well without failing this script
-    elif [ -x /etc/rc.d/init.d/elasticsearch ] ; then
-        /etc/rc.d/init.d/elasticsearch restart || true
     fi
     echo " OK"
 fi

distribution/packages/src/common/scripts/prerm

@@ -53,21 +53,7 @@ esac
 if [ "$STOP_REQUIRED" = "true" ]; then
     echo -n "Stopping elasticsearch service..."
     if command -v systemctl >/dev/null; then
-        systemctl --no-reload stop elasticsearch.service
-
-    elif [ -x /etc/init.d/elasticsearch ]; then
-        if command -v invoke-rc.d >/dev/null; then
-            invoke-rc.d elasticsearch stop
-        else
-            /etc/init.d/elasticsearch stop
-        fi
-
-    # older suse linux distributions do not ship with systemd
-    # but do not have an /etc/init.d/ directory
-    # this tries to start the elasticsearch service on these
-    # as well without failing this script
-    elif [ -x /etc/rc.d/init.d/elasticsearch ] ; then
-        /etc/rc.d/init.d/elasticsearch stop
+        systemctl --no-reload stop elasticsearch.service || true
     fi
     echo " OK"
 fi
@@ -82,14 +68,6 @@ if [ "$REMOVE_SERVICE" = "true" ]; then
     if command -v systemctl >/dev/null; then
         systemctl disable elasticsearch.service > /dev/null 2>&1 || true
     fi
-
-    if command -v chkconfig >/dev/null; then
-        chkconfig --del elasticsearch 2> /dev/null || true
-    fi
-
-    if command -v update-rc.d >/dev/null; then
-        update-rc.d elasticsearch remove >/dev/null || true
-    fi
 fi
 
 ${scripts.footer}

distribution/packages/src/deb/lintian/elasticsearch

@@ -20,19 +20,13 @@ non-standard-dir-perm etc/elasticsearch/jvm.options.d/ 2750 != 0755
 non-standard-file-perm etc/elasticsearch/*
 non-standard-dir-perm var/lib/elasticsearch/ 2750 != 0755
 non-standard-dir-perm var/log/elasticsearch/ 2750 != 0755
-executable-is-not-world-readable etc/init.d/elasticsearch 0750
-non-standard-file-permissions-for-etc-init.d-script etc/init.d/elasticsearch 0750 != 0755
 
 # this lintian tag is simply wrong; contrary to the explanation, debian systemd
 # does actually look at /usr/lib/systemd/system
 systemd-service-file-outside-lib usr/lib/systemd/system/elasticsearch.service
 
-# we do not automatically enable the service in init.d or systemd
-script-in-etc-init.d-not-registered-via-update-rc.d etc/init.d/elasticsearch
-
-# the package scripts handle init.d/systemd directly and don't need to use deb helpers
+# the package scripts handle systemd directly and don't need to use deb helpers
 maintainer-script-calls-systemctl
-prerm-calls-updaterc.d elasticsearch
 
 # bundled JDK
 embedded-library