[ab4fdfc] | 1 | <?xml version="1.0" encoding="UTF-8"?>
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[58cba7f0] | 2 | <!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
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| 3 | "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
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| 4 | <!ENTITY % general-entities SYSTEM "../../general.ent">
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| 5 | %general-entities;
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| 6 | ]>
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| 7 |
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[c751775] | 8 | <sect1 id="ojdk-conf" xreflabel="Configuring the Java environment">
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[58cba7f0] | 9 | <?dbhtml filename="ojdk-conf.html"?>
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| 10 |
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| 11 |
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[c751775] | 12 | <title>Configuring the Java environment</title>
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[58cba7f0] | 13 |
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[55bcdd7] | 14 | <sect2 id="java-profile">
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| 15 | <title>Setting up the environment</title>
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| 16 |
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[58cba7f0] | 17 | <para>
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| 18 | After the package installation is complete, the next step is to make sure
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| 19 | that the system can properly find the files. If you set up your login
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| 20 | scripts as recommended in <xref linkend='postlfs-config-profile'/>, update
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| 21 | the environment by creating the <filename>openjdk.sh</filename> script,
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| 22 | as the <systemitem class="username">root</systemitem> user:
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| 23 | </para>
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| 24 |
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| 25 | <screen role="root"><userinput>cat > /etc/profile.d/openjdk.sh << "EOF"
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| 26 | <literal># Begin /etc/profile.d/openjdk.sh
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| 27 |
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| 28 | # Set JAVA_HOME directory
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| 29 | JAVA_HOME=/opt/jdk
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| 30 |
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| 31 | # Adjust PATH
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| 32 | pathappend $JAVA_HOME/bin
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| 33 |
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| 34 | # Auto Java CLASSPATH: Copy jar files to, or create symlinks in, the
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[7c6b211f] | 35 | # /usr/share/java directory.
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[58cba7f0] | 36 |
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| 37 | AUTO_CLASSPATH_DIR=/usr/share/java
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| 38 |
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| 39 | pathprepend . CLASSPATH
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| 40 |
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| 41 | for dir in `find ${AUTO_CLASSPATH_DIR} -type d 2>/dev/null`; do
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| 42 | pathappend $dir CLASSPATH
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| 43 | done
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| 44 |
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| 45 | for jar in `find ${AUTO_CLASSPATH_DIR} -name "*.jar" 2>/dev/null`; do
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| 46 | pathappend $jar CLASSPATH
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| 47 | done
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| 48 |
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| 49 | export JAVA_HOME
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[f0206fc] | 50 |
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| 51 | # By default, Java creates several files in a directory named
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| 52 | # /tmp/hsperfdata_[username]. This directory contains files that are used for
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| 53 | # performance monitoring and profiling, but aren't normally needed on a BLFS
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| 54 | # system. This environment variable disables that feature.
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| 55 | _JAVA_OPTIONS="-XX:-UsePerfData"
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| 56 |
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| 57 | export _JAVA_OPTIONS
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| 58 |
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| 59 | unset AUTO_CLASSPATH_DIR dir jar _JAVA_OPTIONS
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[58cba7f0] | 60 |
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| 61 | # End /etc/profile.d/openjdk.sh</literal>
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[77b64bd] | 62 | EOF</userinput></screen>
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| 63 |
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| 64 | <para>
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| 65 | If <xref linkend="sudo"/> is installed, the super user should have
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| 66 | access to the above variables. Execute the following commands as the
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| 67 | <systemitem class="username">root</systemitem> user:
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| 68 | </para>
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| 69 |
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| 70 | <screen role="root"><userinput>cat > /etc/sudoers.d/java << "EOF"
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| 71 | <literal>Defaults env_keep += JAVA_HOME
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[f0206fc] | 72 | Defaults env_keep += CLASSPATH
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| 73 | Defaults env_keep += _JAVA_OPTIONS</literal>
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[58cba7f0] | 74 | EOF</userinput></screen>
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| 75 |
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| 76 | <para>
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[0d754e01] | 77 | To use <command>mandb</command> to include the OpenJDK man pages
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[58cba7f0] | 78 | in its database, issue, as the <systemitem class="username">root
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| 79 | </systemitem> user:
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| 80 | </para>
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| 81 |
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| 82 | <screen role="root"><userinput>cat >> /etc/man_db.conf << "EOF" &&
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| 83 | <literal># Begin Java addition
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| 84 | MANDATORY_MANPATH /opt/jdk/man
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| 85 | MANPATH_MAP /opt/jdk/bin /opt/jdk/man
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| 86 | MANDB_MAP /opt/jdk/man /var/cache/man/jdk
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| 87 | # End Java addition</literal>
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| 88 | EOF
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| 89 |
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[f9f0406c] | 90 | mkdir -p /var/cache/man &&
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[58cba7f0] | 91 | mandb -c /opt/jdk/man</userinput></screen>
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| 92 |
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[55bcdd7] | 93 | </sect2>
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| 94 |
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| 95 | <sect2 id="ojdk-certs" xreflabel="installing the JVM Certificate Authority Certificates">
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| 96 |
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| 97 | <title>Setting up the Certificate Authority Certificates for Java</title>
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| 98 |
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| 99 | <para>
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| 100 | <application>OpenJDK</application> uses its own format for the
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| 101 | CA certificates. The Java security modules use
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| 102 | <envar>$JAVA_HOME</envar><filename>/lib/security/cacerts</filename> by
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| 103 | default. In order to keep all the certificates in one place, we use
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[8944fff] | 104 | <filename>/etc/ssl/java/cacerts</filename>. The instructions
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| 105 | on the <xref linkend="make-ca"/> page previously created the file
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[55bcdd7] | 106 | located in <filename class="directory">/etc/ssl/java</filename>.
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[b59e5eb3] | 107 | Set up a symlink in the default location as the
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[55bcdd7] | 108 | <systemitem class="username">root</systemitem> user:
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| 109 | </para>
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| 110 |
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[8944fff] | 111 | <screen role="root"><userinput>ln -sfv /etc/pki/tls/java/cacerts /opt/jdk/lib/security/cacerts</userinput></screen>
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[55bcdd7] | 112 |
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[58cba7f0] | 113 | <para>
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[8944fff] | 114 | Use the following command to check if the <filename>cacerts</filename>
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[55bcdd7] | 115 | file has been successfully installed:
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[58cba7f0] | 116 | </para>
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| 117 |
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[8944fff] | 118 | <screen role="root"><userinput>/opt/jdk/bin/keytool -list -cacerts</userinput></screen>
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[55bcdd7] | 119 |
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| 120 | <para>
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| 121 | At the prompt <computeroutput>Enter keystore password:</computeroutput>,
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| 122 | enter <userinput>changeit</userinput> (the default) or just press the
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| 123 | <quote>Enter</quote> key. If the <filename>cacerts</filename> file was
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| 124 | installed correctly, you will see a list of the certificates with
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| 125 | related information for each one. If not, you need to reinstall them.
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| 126 | </para>
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| 127 |
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| 128 | <para>
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| 129 | If you later install a new JVM, you just have to create the symlink in
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| 130 | the default location to be able to use the cacerts.
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| 131 | </para>
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| 132 |
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| 133 | </sect2>
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| 134 |
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[58cba7f0] | 135 | </sect1>
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