Port fixture image from ubuntu 24.04 to latest alpine

Author: breskeby

muted-tests.yml

@@ -229,8 +229,6 @@ tests:
   issue: https://github.com/elastic/elasticsearch/issues/116777
 - class: org.elasticsearch.xpack.security.authc.ldap.ActiveDirectoryRunAsIT
   issue: https://github.com/elastic/elasticsearch/issues/115727
-- class: org.elasticsearch.xpack.security.authc.kerberos.KerberosAuthenticationIT
-  issue: https://github.com/elastic/elasticsearch/issues/118414
 - class: org.elasticsearch.smoketest.DocsClientYamlTestSuiteIT
   method: test {yaml=reference/search/search-your-data/retrievers-examples/line_98}
   issue: https://github.com/elastic/elasticsearch/issues/119155

test/fixtures/krb5kdc-fixture/Dockerfile

@@ -1,10 +1,10 @@
-FROM ubuntu:24.04
+FROM alpine:3.21.0
 
-ADD . /fixture
-RUN apt-get update && apt-get install -y --no-install-recommends python3 krb5-kdc krb5-admin-server && apt-get clean &&  rm -rf /var/lib/apt/lists/*
+ADD src/main/resources /fixture
+RUN apk update && apk add -y --no-cache python3 krb5 krb5-server
 
 RUN echo kerberos.build.elastic.co > /etc/hostname
-RUN bash /fixture/src/main/resources/provision/installkdc.sh
+RUN sh /fixture/provision/installkdc.sh
 
 EXPOSE 88
 EXPOSE 88/udp

test/fixtures/krb5kdc-fixture/build.gradle

@@ -17,7 +17,7 @@ dockerFixtures {
   krb5dc {
     dockerContext = projectDir
     version = "1.1"
-    baseImages = ["ubuntu:24.04"]
+    baseImages = ["alpine:3.21.0"]
   }
 }
 

test/fixtures/krb5kdc-fixture/src/main/java/org/elasticsearch/test/fixtures/krb5kdc/Krb5kDcContainer.java

@@ -39,14 +39,14 @@ public final class Krb5kDcContainer extends DockerEnvironmentAwareTestContainer
     public enum ProvisioningId {
         HDFS(
             "hdfs",
-            "/fixture/src/main/resources/provision/hdfs.sh",
+            "/fixture/provision/hdfs.sh",
             "/fixture/build/keytabs/hdfs_hdfs.build.elastic.co.keytab",
             "/fixture/build/keytabs/elasticsearch.keytab",
             "hdfs/[email protected]"
         ),
         PEPPA(
             "peppa",
-            "/fixture/src/main/resources/provision/peppa.sh",
+            "/fixture/provision/peppa.sh",
             "/fixture/build/keytabs/peppa.keytab",
             "/fixture/build/keytabs/HTTP_localhost.keytab",
             "[email protected]"
@@ -94,7 +94,7 @@ public Krb5kDcContainer(ProvisioningId provisioningId) {
         withNetworkAliases("kerberos.build.elastic.co", "build.elastic.co");
         withCopyFileToContainer(MountableFile.forHostPath("/dev/urandom"), "/dev/random");
         withExtraHost("kerberos.build.elastic.co", "127.0.0.1");
-        withCommand("bash", provisioningId.scriptPath);
+        withCommand("sh", provisioningId.scriptPath);
     }
 
     @Override

test/fixtures/krb5kdc-fixture/src/main/resources/provision/addprinc.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/sh
 
  # Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
  # or more contributor license agreements. Licensed under the "Elastic License
@@ -24,7 +24,7 @@ PASSWD="$2"
 USER=$(echo $PRINC | tr "/" "_")
 
 VDIR=/fixture
-RESOURCES=$VDIR/src/main/resources
+RESOURCES=$VDIR
 PROV_DIR=$RESOURCES/provision
 ENVPROP_FILE=$RESOURCES/env.properties
 BUILD_DIR=$VDIR/build

test/fixtures/krb5kdc-fixture/src/main/resources/provision/hdfs.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/sh
 
 set -e
 

test/fixtures/krb5kdc-fixture/src/main/resources/provision/installkdc.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/sh
 
  # Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
  # or more contributor license agreements. Licensed under the "Elastic License
@@ -12,8 +12,7 @@ set -e
 # KDC installation steps and considerations based on https://web.mit.edu/kerberos/krb5-latest/doc/admin/install_kdc.html
 # and helpful input from https://help.ubuntu.com/community/Kerberos
 
-VDIR=/fixture
-RESOURCES=$VDIR/src/main/resources
+RESOURCES=/fixture
 PROV_DIR=$RESOURCES/provision
 ENVPROP_FILE=$RESOURCES/env.properties
 LOCALSTATEDIR=/etc
@@ -53,7 +52,7 @@ touch $LOGDIR/krb5lib.log
 kdb5_util create -s -r $REALM_NAME -P zyxwvutsrpqonmlk9876
 
 # Set up admin acls
-cat << EOF > /etc/krb5kdc/kadm5.acl
+cat << EOF > /var/lib/krb5kdc/kadm5.acl
 */admin@$REALM_NAME	*
 */*@$REALM_NAME		i
 EOF

test/fixtures/krb5kdc-fixture/src/main/resources/provision/peppa.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/sh
 
 set -e