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configure_jdk_krbref.sh
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configure_jdk_krbref.sh
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#!/bin/bash
# shellcheck disable=SC1091
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http:https://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
# Copyright Clairvoyant 2020
PATH=/usr/bin:/usr/sbin:/bin:/sbin:/usr/local/bin
# A problem has been identified in all JDKs starting with OpenJDK 1.8u242, and
# JDK 11.0.6. The problem is related to changes in the way OpenJDK supports
# Kerberos referrals, specified in JDK-8215032. As a result, the JDK
# implementation of RFC-6806 will break Cloudera, custom and 3rd party
# application's interpretation of Kerberos credentials under certain
# conditions.
# Function to discover basic OS details.
discover_os() {
if command -v lsb_release >/dev/null; then
# CentOS, Ubuntu, RedHatEnterpriseServer, RedHatEnterprise, Debian, SUSE LINUX, OracleServer
# shellcheck disable=SC2034
OS=$(lsb_release -is)
# CentOS= 6.10, 7.2.1511, Ubuntu= 14.04, RHEL= 6.10, 7.5, SLES= 11, OEL= 7.6
# shellcheck disable=SC2034
OSVER=$(lsb_release -rs)
# 7, 14
# shellcheck disable=SC2034
OSREL=$(echo "$OSVER" | awk -F. '{print $1}')
# Ubuntu= trusty, wheezy, CentOS= Final, RHEL= Santiago, Maipo, SLES= n/a
# shellcheck disable=SC2034
OSNAME=$(lsb_release -cs)
else
if [ -f /etc/redhat-release ]; then
if [ -f /etc/centos-release ]; then
# shellcheck disable=SC2034
OS=CentOS
# shellcheck disable=SC2034
OSREL=$(rpm -qf /etc/centos-release --qf='%{VERSION}\n' | awk -F. '{print $1}')
# shellcheck disable=SC2034
OSNAME=$(awk -F"[()]" '{print $2}' /etc/centos-release | sed 's| ||g')
if [ -z "$OSNAME" ]; then
# shellcheck disable=SC2034
OSNAME="n/a"
fi
if [ "$OSREL" -le "6" ]; then
# 6.10.el6.centos.12.3
# shellcheck disable=SC2034
OSVER=$(rpm -qf /etc/centos-release --qf='%{VERSION}.%{RELEASE}\n' | awk -F. '{print $1"."$2}')
elif [ "$OSREL" == "7" ]; then
# 7.5.1804.4.el7.centos
# shellcheck disable=SC2034
OSVER=$(rpm -qf /etc/centos-release --qf='%{VERSION}.%{RELEASE}\n' | awk -F. '{print $1"."$2"."$3}')
elif [ "$OSREL" == "8" ]; then
if [ "$(rpm -qf /etc/centos-release --qf='%{NAME}\n')" == "centos-stream-release" ]; then
# shellcheck disable=SC2034
OS=CentOSStream
# shellcheck disable=SC2034
OSVER=$(rpm -qf /etc/centos-release --qf='%{VERSION}\n' | awk -F. '{print $1}')
else
# shellcheck disable=SC2034
OSVER=$(rpm -qf /etc/centos-release --qf='%{VERSION}.%{RELEASE}\n' | awk -F. '{print $1"."$2"."$4}')
fi
else
# shellcheck disable=SC2034
OS=CentOSStream
# shellcheck disable=SC2034
OSVER=$(rpm -qf /etc/centos-release --qf='%{VERSION}\n')
fi
elif [ -f /etc/oracle-release ]; then
# shellcheck disable=SC2034
OS=OracleServer
# 7.6
# shellcheck disable=SC2034
OSVER=$(rpm -qf /etc/oracle-release --qf='%{VERSION}\n')
# shellcheck disable=SC2034
OSNAME="n/a"
else
# shellcheck disable=SC2034
OS=RedHatEnterpriseServer
# 8.6, 7.5, 6Server
# shellcheck disable=SC2034
OSVER=$(rpm -qf /etc/redhat-release --qf='%{VERSION}\n')
# shellcheck disable=SC2034
OSREL=$(echo "$OSVER" | awk -F. '{print $1}')
if [ "$OSVER" == "6Server" ]; then
# shellcheck disable=SC2034
OSVER=$(rpm -qf /etc/redhat-release --qf='%{RELEASE}\n' | awk -F. '{print $1"."$2}')
elif [ "$OSREL" == "8" ]; then
# shellcheck disable=SC2034
OS=RedHatEnterprise
fi
# shellcheck disable=SC2034
OSNAME=$(awk -F"[()]" '{print $2}' /etc/redhat-release | sed 's| ||g')
fi
# shellcheck disable=SC2034
OSREL=$(echo "$OSVER" | awk -F. '{print $1}')
elif [ -f /etc/SuSE-release ]; then
if grep -q "^SUSE Linux Enterprise Server" /etc/SuSE-release; then
# shellcheck disable=SC2034
OS="SUSE LINUX"
fi
# shellcheck disable=SC2034
OSVER=$(rpm -qf /etc/SuSE-release --qf='%{VERSION}\n' | awk -F. '{print $1}')
# shellcheck disable=SC2034
OSREL=$(echo "$OSVER" | awk -F. '{print $1}')
# shellcheck disable=SC2034
OSNAME="n/a"
fi
fi
}
echo "********************************************************************************"
echo "*** $(basename "$0")"
echo "********************************************************************************"
# Check to see if we are on a supported OS.
discover_os
if [ "$OS" != RedHatEnterpriseServer ] && [ "$OS" != CentOS ] && [ "$OS" != OracleServer ] && [ "$OS" != Debian ] && [ "$OS" != Ubuntu ]; then
echo "ERROR: Unsupported OS."
exit 3
fi
echo "Fixing OpenJDK Kerberos Issue..."
DATE=$(date '+%Y%m%d%H%M%S')
if [ -f /etc/profile.d/jdk.sh ]; then
. /etc/profile.d/jdk.sh
elif [ -f /etc/profile.d/java.sh ]; then
. /etc/profile.d/java.sh
elif [ -d /usr/lib/jvm/java ]; then
JAVA_HOME=/usr/lib/jvm/java
fi
if [ -z "${JAVA_HOME}" ]; then echo "ERROR: \$JAVA_HOME is not set."; exit 10; fi
# https://stackoverflow.com/questions/7334754/correct-way-to-check-java-version-from-bash-script
if type -p java >/dev/null; then
_JAVA=java
elif [ -n "$JAVA_HOME" ] && [ -x "${JAVA_HOME}/bin/java" ]; then
_JAVA="${JAVA_HOME}/bin/java"
else
echo "WARNING: Java not found."
exit 11
fi
if [ -n "$_JAVA" ]; then
_JAVA_VERSION=$("$_JAVA" -version 2>&1 | awk -F '"' '/version/ {print $2}')
_JAVA_VERSION_MAJ=$(echo "${_JAVA_VERSION}" | awk -F. '{print $1}')
_JAVA_VERSION_MIN=$(echo "${_JAVA_VERSION}" | awk -F. '{print $2}')
_JAVA_VERSION_PATCH=$(echo "${_JAVA_VERSION}" | awk -F. '{print $3}' | sed -e 's|_.*||')
_JAVA_VERSION_RELEASE=$(echo "${_JAVA_VERSION}" | awk -F_ '{print $2}')
else
_JAVA_VERSION_MAJ=0
_JAVA_VERSION_MIN=0
_JAVA_VERSION_PATCH=0
_JAVA_VERSION_RELEASE=0
fi
if { [ "${_JAVA_VERSION_MAJ}" -eq 1 ] && [ "${_JAVA_VERSION_MIN}" -eq 8 ] && [ "${_JAVA_VERSION_RELEASE}" -ge 242 ]; } || { [ "${_JAVA_VERSION_MAJ}" -eq 11 ] && [ "${_JAVA_VERSION_MIN}" -eq 0 ] && [ "${_JAVA_VERSION_PATCH}" -ge 6 ]; }; then
echo "INFO: OpenJDK Kerberos issue present for JDK version ${_JAVA_VERSION}. Fixing..."
if [ "${_JAVA_VERSION_MAJ}" -eq 1 ]; then
_JSECPATH=/jre/lib
elif [ "${_JAVA_VERSION_MAJ}" -eq 11 ]; then
_JSECPATH=/conf
fi
if [ ! -f ${JAVA_HOME}${_JSECPATH}/security/java.security-orig ]; then
/bin/cp -p ${JAVA_HOME}${_JSECPATH}/security/java.security ${JAVA_HOME}${_JSECPATH}/security/java.security-orig
else
/bin/cp -p ${JAVA_HOME}${_JSECPATH}/security/java.security ${JAVA_HOME}${_JSECPATH}/security/java.security."${DATE}"
fi
sed -e '/^sun.security.krb5.disableReferrals=/s|=.*|=true|' -i "${JAVA_HOME}${_JSECPATH}/security/java.security"
if ! grep -q ^sun.security.krb5.disableReferrals= "${JAVA_HOME}${_JSECPATH}/security/java.security"; then
echo "sun.security.krb5.disableReferrals=true" >>"${JAVA_HOME}${_JSECPATH}/security/java.security"
fi
exit 0
else
echo "NOTICE: OpenJDK Kerberos issue does not exist for JDK version ${_JAVA_VERSION}. Exiting..."
exit 0
fi