Sunny Chan blogs Can you see the Logic in my Madness?

Blog server moved to Rocky Linux 9

by Sunny Chan

Posted on Wednesday March 01, 2023 at 03:38am in Linux

The blog server has been migrated to Rocky Linux 9 - as Centos 7 is end of life soon. Containers makes migration pretty easy - it's just as simple as moving the config files over!

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Blog software updated with containers

by Sunny Chan

Posted on Sunday March 07, 2021 at 12:44pm in Linux

Another upgrade recently - I used to run the blog with a tomcat instance directly installed in the OS but I have just containerized it with podman. I used Tomcat docker image and basically mapped the existing data files from my home directory into the container and it pretty much works.

The more challenging part is to convince systemctl to start the blog container every time the system restarts. I use podman as my container runtime as it allows running the container in the user namespace instead of root, which makes it more secure. However it seems that running as user namespace makes it difficult to setup systemctl due to issues with podman. You should follow the advise in this podman bug if you are having trouble:

  • Set Requires/After to user@<uid>.service to ensure all the user environment is setup before systemctl starts the blog container
  • You will need to run "loginctl enable-linger" for the user (see the issue comment)

Once it is all set it works like a treat. Now I can move my blog to any vps hosts that support docker container without dependent on the whole OS setup

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Roller with https

by Sunny Chan

Posted on Wednesday July 25, 2018 at 12:40am in Linux

I have just migrated my roller to use https, and just for those who will need to do it later, you will need to make roller to replace all the URL with https. To do this, add the following to roller-custom.properties:


weblog.absoluteurl.[blog name]=https://someurl/roller


where blog name is the name of your blog, displayed at the top when you get into the configuration page. 

Comments [1]

Updated OpenJDK-build docker image

by Sunny Chan

Posted on Tuesday September 12, 2017 at 06:31am in Linux

Since I have started my new job I have quite a bit of opportunity to do a bit of Docker deployment. So I have spend some time to update my docker image for openjdk build.


What's new:




  1. The image is now based on latest CentOS 7 (Oracle builds with Oracle Linux which is basically rebranded RHEL/Centos)

  2. It now has a docker build file, git hub repo and automatic build on Docker hub

  3. The default start up will now be user openjdk, and you could mount your data directory as home.

  4. I have put nano, git and hg in the image for your convience


This image will be able to build latest JDK8 and JDK9 source code.  



Here is an example on how to build an image 


#notice that you need :Z at the end of mount so that it fixes up selinux

#If you use default userid you can just mount your home dir (xxx = your id on host).

sudo docker run --rm -it -v /home/xxx:/home/openjdk:Z sunnythepooh/openjdk-build-docker:latest bash


[openjdk@8a4bc8214db2 ~]$ hg clone http://hg.openjdk.java.net/jdk9/jdk9

destination directory: jdk9

requesting all changes

adding changesets

adding manifests

adding file changes

added 2628 changesets with 4461 changes to 468 files

updating to branch default

322 files updated, 0 files merged, 0 files removed, 0 files unresolved

[openjdk@8a4bc8214db2 jdk9]$ bash get_source.sh

WARNING: Mercurial version 2.6.3 or later is recommended. /usr/bin/hg is version 2.6.2

# Repositories:  corba jaxp jaxws langtools jdk hotspot nashorn

                corba:   hg clone http://hg.openjdk.java.net/jdk9/jdk9/corba corba

                 jaxp:   hg clone http://hg.openjdk.java.net/jdk9/jdk9/jaxp jaxp

                corba:   requesting all changes

                 jaxp:   requesting all changes

                 jaxp:   adding changesets

                corba:   adding changesets

                corba:   adding manifests

                 jaxp:   adding manifests

                corba:   adding file changes

                 jaxp:   adding file changes

                corba:   added 876 changesets with 5451 changes to 2597 files

                corba:   updating to branch default

                corba:   1201 files updated, 0 files merged, 0 files removed, 0 files unresolved

                jaxws:   hg clone http://hg.openjdk.java.net/jdk9/jdk9/jaxws jaxws

                jaxws:   requesting all changes

                jaxws:   adding changesets

                jaxws:   adding manifests

                jaxws:   adding file changes

                jaxws:   added 801 changesets with 21839 changes to 10824 files

                jaxws:   updating to branch default

                jaxws:   3760 files updated, 0 files merged, 0 files removed, 0 files unresolved

            langtools:   hg clone http://hg.openjdk.java.net/jdk9/jdk9/langtools langtools

            langtools:   requesting all changes

            langtools:   adding changesets

            langtools:   adding manifests

                 jaxp:   added 1153 changesets with 14751 changes to 8449 files

                 jaxp:   updating to branch default

                 jaxp:   3352 files updated, 0 files merged, 0 files removed, 0 files unresolved

                  jdk:   hg clone http://hg.openjdk.java.net/jdk9/jdk9/jdk jdk

                  jdk:   requesting all changes

                  jdk:   adding changesets

            langtools:   adding file changes

                  jdk:   adding manifests

            langtools:   added 4174 changesets with 38097 changes to 11847 files

            langtools:   updating to branch default

            langtools:   9464 files updated, 0 files merged, 0 files removed, 0 files unresolved

              hotspot:   hg clone http://hg.openjdk.java.net/jdk9/jdk9/hotspot hotspot

              hotspot:   requesting all changes

              hotspot:   adding changesets

              hotspot:   adding manifests

              hotspot:   adding file changes

                  jdk:   adding file changes

              hotspot:   added 12824 changesets with 78616 changes to 15832 files

              hotspot:   updating to branch default

              hotspot:   9078 files updated, 0 files merged, 0 files removed, 0 files unresolved

              nashorn:   hg clone http://hg.openjdk.java.net/jdk9/jdk9/nashorn nashorn

              nashorn:   requesting all changes

              nashorn:   adding changesets

              nashorn:   adding manifests

              nashorn:   adding file changes

              nashorn:   added 1928 changesets with 14563 changes to 4181 files

              nashorn:   updating to branch default

              nashorn:   3293 files updated, 0 files merged, 0 files removed, 0 files unresolved

                  jdk:   added 17287 changesets with 152446 changes to 50650 files

                  jdk:   updating to branch default

                  jdk:   27295 files updated, 0 files merged, 0 files removed, 0 files unresolved

# Repositories:  . corba jaxp jaxws langtools jdk hotspot nashorn

                    .:   cd . && hg pull -u

                corba:   cd corba && hg pull -u

                 jaxp:   cd jaxp && hg pull -u

                jaxws:   cd jaxws && hg pull -u

            langtools:   cd langtools && hg pull -u

                  jdk:   cd jdk && hg pull -u

              hotspot:   cd hotspot && hg pull -u

              nashorn:   cd nashorn && hg pull -u

                corba:   pulling from http://hg.openjdk.java.net/jdk9/jdk9/corba

                    .:   pulling from http://hg.openjdk.java.net/jdk9/jdk9

                  jdk:   pulling from http://hg.openjdk.java.net/jdk9/jdk9/jdk

              hotspot:   pulling from http://hg.openjdk.java.net/jdk9/jdk9/hotspot

              nashorn:   pulling from http://hg.openjdk.java.net/jdk9/jdk9/nashorn

                jaxws:   pulling from http://hg.openjdk.java.net/jdk9/jdk9/jaxws

            langtools:   pulling from http://hg.openjdk.java.net/jdk9/jdk9/langtools

                 jaxp:   pulling from http://hg.openjdk.java.net/jdk9/jdk9/jaxp

                jaxws:   searching for changes

                jaxws:   no changes found

              hotspot:   searching for changes

              hotspot:   no changes found

              nashorn:   searching for changes

              nashorn:   no changes found

                corba:   searching for changes

                corba:   no changes found

                    .:   searching for changes

                    .:   no changes found

            langtools:   searching for changes

            langtools:   no changes found

                 jaxp:   searching for changes

                 jaxp:   no changes found

                  jdk:   searching for changes

                  jdk:   no changes found

[openjdk@be86432ef9b0 jdk9]$ bash ./configure

Running generated-configure.sh

configure: Configuration created at Mon Sep 11 16:04:08 UTC 2017.

configure: configure script generated at timestamp 1496926402.

checking for basename... /usr/bin/basename

checking for bash... /usr/bin/bash

checking for cat... /usr/bin/cat

checking for chmod... /usr/bin/chmod

checking for cmp... /usr/bin/cmp

checking for comm... /usr/bin/comm

checking for cp... /usr/bin/cp

checking for cut... /usr/bin/cut

checking for date... /usr/bin/date

checking for gdiff... no

checking for diff... /usr/bin/diff

checking for dirname... /usr/bin/dirname

checking for echo... /usr/bin/echo

checking for expr... /usr/bin/expr

checking for file... /usr/bin/file

checking for find... /usr/bin/find

checking for head... /usr/bin/head

checking for gunzip... /usr/bin/gunzip

checking for pigz... no

checking for gzip... /usr/bin/gzip

checking for ln... /usr/bin/ln

checking for ls... /usr/bin/ls

checking for mkdir... /usr/bin/mkdir

checking for mktemp... /usr/bin/mktemp

checking for mv... /usr/bin/mv

checking for nawk... no

checking for gawk... /usr/bin/gawk

checking for printf... /usr/bin/printf

checking for rm... /usr/bin/rm

checking for rmdir... /usr/bin/rmdir

checking for sh... /usr/bin/sh

<!--------------------- MANY LINES LATER --------------------->

====================================================

A new configuration has been successfully created in

/home/openjdk/jdk9/build/linux-x86_64-normal-server-release

using default settings.




Configuration summary:

* Debug level:    release

* HS debug level: product

* JDK variant:    normal

* JVM variants:   server

* OpenJDK target: OS: linux, CPU architecture: x86, address length: 64

* Version string: 9-internal+0-adhoc..jdk9 (9-internal)




Tools summary:

* Boot JDK:       openjdk version "1.8.0_141" OpenJDK Runtime Environment (build 1.8.0_141-b16) OpenJDK 64-Bit Server VM (build 25.141-b16, mixed mode)  (at /usr/lib/jvm/java-1.8.0-openjdk-1.8.0.141-1.b16.el7_3.x86_64)

* Toolchain:      gcc (GNU Compiler Collection)

* C Compiler:     Version 4.8.5 (at /usr/bin/gcc)

* C++ Compiler:   Version 4.8.5 (at /usr/bin/g++)




Build performance summary:

* Cores to use:   8

* Memory limit:   11783 MB

[openjdk@be86432ef9b0 jdk9]$ make images

Building target 'images' in configuration 'linux-x86_64-normal-server-release'

Compiling 8 files for BUILD_TOOLS_LANGTOOLS

Creating hotspot/variant-server/tools/adlc/adlc from 13 file(s)

Creating support/modules_libs/java.base/libjsig.so from 1 file(s)

Compiling 2 files for BUILD_JVMTI_TOOLS

<!------------------------------------- MANY LINES LATER ----------------------------------------->

----- Build times -------

Start 2017-09-10 16:55:14

End   2017-09-10 17:04:50




00:09:36 TOTAL

-------------------------

Finished building target 'images' in configuration 'linux-x86_64-normal-server-release'
#You should be able to find the build under build/
[openjdk@192f7c9052ff jdk9]$ build/linux-x86_64-normal-server-release/images/jdk/bin/java -version

openjdk version "9-internal"

OpenJDK Runtime Environment (build 9-internal+0-adhoc..jdk9)

OpenJDK 64-Bit Server VM (build 9-internal+0-adhoc..jdk9, mixed mode)


 

Comments [0]

Tags: docker openjdk

ClearOS 6 non-privileged user root access

by Sunny Chan

Posted on Wednesday October 17, 2012 at 11:16pm in Linux

Just to save myself searching for this information again:


In ClearOS 6 (a CentOS clone with nicer WebUI), user cannot access shells and by default you can't modify the settings within the WebUI. In order to enable user shell login, you will need to install "app-shell-extension-core.noarch" package.

Comments [0]

Tags: clearos

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