Remove spurious SGID (opensearch-project#9447)

Setting the SGID bit on directories is maybe something some users will
want to use, but setting it by default for all users does not really
make sense and when packaging OpenSearch, we need to remove this
customization when building packges.

This was added to ElasticSearch to make it possible to manage the
keystore as root while the service runs as an unprivileged user.
Without the SGID trick, the generated keystore was owned by root and
ElasticSearch could not access it.

It is preferable to manage the keystore with non-root privileges, and
this hack is not required in this case.  Stick to the default
permissions and remove this personalization.

Signed-off-by: Romain Tartière <romain@blogreen.org>

CHANGELOG.md

@@ -123,6 +123,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 ### Deprecated
 
 ### Removed
+- Remove spurious SGID bit on directories ([#9447](https://github.com/opensearch-project/OpenSearch/pull/9447))
 
 ### Fixed
 - Fix ignore_missing parameter has no effect when using template snippet in rename ingest processor ([#9725](https://github.com/opensearch-project/OpenSearch/pull/9725))

distribution/packages/build.gradle

@@ -213,7 +213,7 @@ Closure commonPackageConfig(String type, boolean jdk, String architecture) {
     configurationFile '/etc/opensearch/jvm.options'
     configurationFile '/etc/opensearch/log4j2.properties'
     from("${packagingFiles}") {
-      dirMode 02750
+      dirMode 0750
       into('/etc')
       permissionGroup 'opensearch'
       includeEmptyDirs true
@@ -223,7 +223,7 @@ Closure commonPackageConfig(String type, boolean jdk, String architecture) {
     }
     from("${packagingFiles}/etc/opensearch") {
       into('/etc/opensearch')
-      dirMode 02750
+      dirMode 0750
       fileMode 0660
       permissionGroup 'opensearch'
       includeEmptyDirs true
@@ -281,8 +281,8 @@ Closure commonPackageConfig(String type, boolean jdk, String architecture) {
         dirMode mode
       }
     }
-    copyEmptyDir('/var/log/opensearch', 'opensearch', 'opensearch', 02750)
-    copyEmptyDir('/var/lib/opensearch', 'opensearch', 'opensearch', 02750)
+    copyEmptyDir('/var/log/opensearch', 'opensearch', 'opensearch', 0750)
+    copyEmptyDir('/var/lib/opensearch', 'opensearch', 'opensearch', 0750)
     copyEmptyDir('/usr/share/opensearch/plugins', 'root', 'root', 0755)
 
     into '/usr/share/opensearch'

distribution/packages/src/deb/lintian/opensearch

@@ -15,11 +15,11 @@ missing-dep-on-jarwrapper
 
 # we prefer to not make our config and log files world readable
 non-standard-file-perm etc/default/opensearch 0660 != 0644
-non-standard-dir-perm etc/opensearch/ 2750 != 0755
-non-standard-dir-perm etc/opensearch/jvm.options.d/ 2750 != 0755
+non-standard-dir-perm etc/opensearch/ 0750 != 0755
+non-standard-dir-perm etc/opensearch/jvm.options.d/ 0750 != 0755
 non-standard-file-perm etc/opensearch/*
-non-standard-dir-perm var/lib/opensearch/ 2750 != 0755
-non-standard-dir-perm var/log/opensearch/ 2750 != 0755
+non-standard-dir-perm var/lib/opensearch/ 0750 != 0755
+non-standard-dir-perm var/log/opensearch/ 0750 != 0755
 executable-is-not-world-readable etc/init.d/opensearch 0750
 non-standard-file-permissions-for-etc-init.d-script etc/init.d/opensearch 0750 != 0755
 

qa/os/src/test/java/org/opensearch/packaging/util/Packages.java

@@ -194,11 +194,11 @@ private static void verifyInstallation(Installation opensearch, Distribution dis
 
         // we shell out here because java's posix file permission view doesn't support special modes
         assertThat(opensearch.config, file(Directory, "root", "opensearch", p750));
-        assertThat(sh.run("find \"" + opensearch.config + "\" -maxdepth 0 -printf \"%m\"").stdout, containsString("2750"));
+        assertThat(sh.run("find \"" + opensearch.config + "\" -maxdepth 0 -printf \"%m\"").stdout, containsString("750"));
 
         final Path jvmOptionsDirectory = opensearch.config.resolve("jvm.options.d");
         assertThat(jvmOptionsDirectory, file(Directory, "root", "opensearch", p750));
-        assertThat(sh.run("find \"" + jvmOptionsDirectory + "\" -maxdepth 0 -printf \"%m\"").stdout, containsString("2750"));
+        assertThat(sh.run("find \"" + jvmOptionsDirectory + "\" -maxdepth 0 -printf \"%m\"").stdout, containsString("750"));
 
         Stream.of("opensearch.keystore", "opensearch.yml", "jvm.options", "log4j2.properties")
             .forEach(configFile -> assertThat(opensearch.config(configFile), file(File, "root", "opensearch", p660)));