building Canon MF3010 driver on Fedora25

Building Canon MF3010 driver from source, download the source from http://support-in.canon-asia.com/contents/IN/EN/0100270810.html for UFR II/UFR II LT Printer Driver for Linux V3.20 .

[ritesh@x230t SPECS]$ diff -Naurp cndrvcups-common.spec.orig cndrvcups-common.spec
--- cndrvcups-common.spec.orig 2016-11-16 14:37:13.341877857 +0530
+++ cndrvcups-common.spec 2016-11-16 14:34:40.674461102 +0530
@@ -1,5 +1,6 @@
 %define VERSION 3.60
 %define  RELEASE 1
+%global __requires_exclude ^libcaiousb.so$

 %ifarch x86_64
 %define libs32 /usr/lib
@@ -19,6 +20,7 @@ Vendor: CANON INC.
 Group: Applications/Publishing

 Source: cndrvcups-common-%{version}-%{release}.tar.gz
+Patch0: cndrvcups-common-gmodule.patch

 BuildRoot: %{_tmppath}/%{name}-root

@@ -27,6 +29,8 @@ BuildRoot: %{_tmppath}/%{name}-root
 %prep
 %setup -q

+%patch0 -p1
+
 cd buftool
 ./autogen.sh --prefix=%{_prefix} --enable-progpath=%{_bindir} --libdir=%{_libdir} --disable-shared --enable-static

For Fedora25, gmodule needs to be added to build dependency

 

[ritesh@x230t SPECS]$ cat ../SOURCES/cndrvcups-common-gmodule.patch
--- cndrvcups-common-3.60/cngplp/configure.in 2014-12-05 15:26:04.000000000 +0530
+++ cndrvcups-common-3.60/cngplp/configure.in 2016-11-16 14:17:32.517073588 +0530
@@ -11,7 +11,7 @@ AM_PROG_CC_STDC
 AC_HEADER_STDC
 AM_PROG_LIBTOOL

-pkg_modules="gtk+-2.0 >= 2.0.0"
+pkg_modules="gtk+-2.0 >= 2.0.0 gmodule"
 PKG_CHECK_MODULES(PACKAGE, [$pkg_modules])
 AC_SUBST(PACKAGE_CFLAGS)
 AC_SUBST(PACKAGE_LIBS)

rpmbuild away and install. 

Running Sky from tel.red on Fedora25

On Fedora 25, sky crash up on start in QT.

Program received signal SIGABRT, Aborted.
0x00007ffff112692f in raise () from /lib64/libc.so.6
(gdb) bt
#0  0x00007ffff112692f in raise () at /lib64/libc.so.6
#1  0x00007ffff112852a in abort () at /lib64/libc.so.6
#2  0x00007ffff200dcb1 in  () at /usr/lib/sky/lib/libQt5Core.so.5
#3  0x00007ffff24ee835 in QGuiApplicationPrivate::createPlatformIntegration() () at /usr/lib/sky/lib/libQt5Gui.so.5
#4  0x00007ffff24ee955 in QGuiApplicationPrivate::createEventDispatcher() () at /usr/lib/sky/lib/libQt5Gui.so.5
#5  0x00007ffff21cea64 in QCoreApplicationPrivate::init() () at /usr/lib/sky/lib/libQt5Core.so.5
#6  0x00007ffff24f2340 in QGuiApplicationPrivate::init() () at /usr/lib/sky/lib/libQt5Gui.so.5
#7  0x00007ffff2be62b9 in QApplicationPrivate::init() () at /usr/lib/sky/lib/libQt5Widgets.so.5
#8  0x0000000000434e41 in main ()
(gdb) quit
A debugging session is active.

Once workaround, is to let sky use the system provided qt5 libraries. 

$ rpm -q sky
sky-2.1.6327-1.fc24.x86_64
$ cd /usr/lib/sky

$ sudo mkdir old

$ sudo mv libQt5* old

$ sky

Would be nicer, if sky could use system libraries by default.

$ rpm -Uvh sky-system-qt ( meta package,installs sky and qt deps)

$ cat sky.sh

if shibboleet and ~/config/sky/.version is older than install

  use system library and start sky

  if start failed, disable shibboleet

else

  ld library jazz

  sky

fi

installing splunkforwarder using ansible

The vars

---
  splunk_home: /opt/splunkforwarder
  splunk_exec: "{{ splunk_home }}/bin/splunk"

The playbook

---

- name: install splunk forwarder
  yum: name=splunkforwarder
       state=latest
  become: yes

# check for first time run
- stat:
    path: "{{ splunk_home }}/ftr"
  register: result_splunk_ftr_stat

- block:
    - name: setup splunk for first time run
      shell: |
        ps aux|grep splunkd && pkill -9 splunkd || true
        {{ splunk_exec }} start --accept-license --answer-yes --no-prompt
        {{ splunk_exec }} enable boot-start
  when: result_splunk_ftr_stat.stat.exists
  become: yes


# Only add servers which are not in list
# shell: /opt/splunkforwarder/bin/splunk list forward-server -auth user:pass
# register: current_fwd_list
#- block:
#    shell: "{{ splunk_exec }} add forward-server {{ splunk_server }}:{{ splunk_server_port }} -auth user:pass"
# when: item not in current_fwd_list
#  become: yes
# with_items: splunk_fwd_server

# same logic for adding logs
#    - shell: "{{ splunk_exec }} add monitor {{ item.path }} -index {{ item.idx }} -sourcetype {{ item.path }} || true"
#  with_items:  "{{ splunk_log_files }}"

and profit !

adding authorized keys using ansible

You can use jinja template engine to set this

vars:
  ssh_user_key:
    - user: ritesh
      exclusive: no
      keys:
        - ritesh.centos
        - ritesh.fedora

- name: ssh user key upload
  authorized_key:
    user: "{{ item.user }}"
    exclusive: "{{ item.exclusive if item.exclusive is defined else 'no' }}"
    key: "{% for file_name in item['keys'] %} {{ key|default('') + lookup('file', file_name) }}{% if not loop.last %}{{ '\n' }}{% endif %} {% endfor %}"
  become_user: "{{ item.user }}"
  become: yes

  with_items:
    - "{{ ssh_user_key }}"
  tags:
    - setup-user-ssh-client-key

adding authorized keys using ansible

You can use jinja template engine to set this

vars:
  ssh_user_key:
    - user: ritesh
      exclusive: no
      keys:
        - ritesh.centos
        - ritesh.fedora

- name: ssh user key upload
  authorized_key:
    user: "{{ item.user }}"
    exclusive: "{{ item.exclusive if item.exclusive is defined else 'no' }}"
    key: "{% for file_name in item['keys'] %} {{ key|default('') + lookup('file', file_name) }}{% if not loop.last %}{{ '\n' }}{% endif %} {% endfor %}"
  become_user: "{{ item.user }}"
  become: yes

  with_items:
    - "{{ ssh_user_key }}"
  tags:
    - setup-user-ssh-client-key

zabbix 3.0.2 for RHEL6 is built

A follow up on using zabbix30 on el6 . zabbix 3.0.2 packages for RHEL6.x64 has been pushed out.

I have switched to IUS repository, over webtatic.

phpipam behind a load balancer which handles ssl offloading

phpipam has support for ssl offloading, via X-Forwarded-For header .

  public function createURL () {
                # reset url for base
                if($_SERVER['SERVER_PORT'] == "443")            { $url = "https://$_SERVER[HTTP_HOST]"; }
                // reverse proxy doing SSL offloading
                elseif(isset($_SERVER['HTTP_X_FORWARDED_PROTO']) && $_SERVER['HTTP_X_FORWARDED_PROTO'] == 'https')      { $url = "https://$_SERVER[SERVER_NAME]"; }
                elseif(isset($_SERVER['HTTP_X_SECURE_REQUEST'])  && $_SERVER['HTTP_X_SECURE_REQUEST'] == 'true')        { $url = "https://$_SERVER[SERVER_NAME]"; }
                // custom port
                elseif($_SERVER['SERVER_PORT']!="80")           { $url = "http://$_SERVER[SERVER_NAME]:$_SERVER[SERVER_PORT]"; }
                // normal http

Unfortunately, some don't follow this or have been configured for this, which results in phpipam loading incorrectly. To workaround this issue, edit config.php

$_SERVER['HTTP_X_FORWARDED_PROTO'] = "https";

And now, back to life.

python : disabling SSL verification on pyvmomi on python

• self signed certificate ? 
• RHEL6 ? python 2.6 and 2.7.10 mixed environment ?
• pyvmomi 5.5+ ?

Looking for a quick fix ?

...
File "/usr/lib/python2.6/site-packages/requests/adapters.py", line 447, in send
    raise SSLError(e, request=request)
requests.exceptions.SSLError: [Errno 1] _ssl.c:492: error:14090086:SSL routines:SSL3_GET_SERVER_CERTIFICATE:certificate verify failed

[root@fb7a3cd8c69d ~]# vim my_script.pyt
...
    context = None
    try:
        # Disabling SSL certificate verification       
        context = ssl.SSLContext(ssl.PROTOCOL_SSLv3)
        context.verify_mode = ssl.CERT_NONE
    except AttributeError:
        rget = requests.get
        requests.get = lambda obj, *args,**kwargs: rget(obj,verify=False)
        requests.packages.urllib3.disable_warnings()

    si = SmartConnect(host=args.host,
            user=user,
            pwd=args.password,
            port=int(args.port), sslContext=context)

And you are good to go. This will resolve the issue, and allow you to focus on your life

PS: You would still need to fix this to use basic auth.

BSNL redirecting to “http://domain-error.com”

To work around this ISP spam, I have forced NM to use google dns .

cat  /etc/NetworkManager/system-connections/Auto\ Ethernet 
...

[ipv4]
dns=8.8.8.8;8.8.4.4;
dns-search=
method=auto
ignore-auto-dns=true
...

Alternatively, install and use nmtui

refence: 

https://developers.google.com/speed/public-dns/ 

https://askubuntu.com/questions/708762/redirecting-to-http-domain-error-com 

https://www.hogarthuk.com/?q=node/8 

Using zabbix 3.0 on EL6

zabbix 3.0 requires php5.4 or above, and consequently is not available on EL6. To workaround this, you would need to install php562 from webtatic.

I prefer to use mariadb , with php56u on my zabbix server.  The prebuilt packages can be downloaded from copr:ritz/zabbix30

 This is a rebuild against mariadb 10.1.x, with php56-5.6.19 for zabbix-3.0.1 .

Instructions for manual install - https://www.zabbix.com/documentation/3.0/manual/installation/install_from_packages

sql scripts can be grabbed from  svn - https://zabbix.org/wiki/Get_Zabbix

Using C++ REST on Fedora Linux

Microsoft has release Casablanca ( C++ REST) to github. I have pushed Fedora packages for these to copr .

Happy -lcpprest

Increase the offline storage quota for Kindle in epiphany

You can install Amazon's Kindle Cloud reader as a webapp on Fedora Linux using epiphany from gnome-software.

This just leaves you with one issue, the default offline storage quota for Database is a measly 6m, which you hit real quick.

Turns out, webkitgtk3 used to offer an api webkit_get_default_web_database_quota with webkitgtk3, which has been removed from webkitgtk4 used by epiphany.

To manually update this quota, locate the folder used by epiphany in application mode for Kindle.

$ ls ~/.local/share/
...
epiphany-kindlecloud-xxx
...


Open up the Database file here, and manually set the quota

$ cd ~/.local/share/epiphany-kindlecloud-xxx/databases
$ sqlite3 Database.db
sqlite3 > SELECT * FROM origins;
https_read.amazon.com_0| 6164480
sqlite3 > UPDATE origins SET quota=102400000 WHERE origin=https_read.amazon.com_0;


And now back to life.