Swift Tips

Swift stores the data we store in the containers in .data foramt in the corresponding Drives.

[root@compute ~]# find /srv/node/sdc1 -iname *.data
/srv/node/sdc1/objects/58511/456/3923e942436c9de6e832f944fb30c456/1421697356.06343.data
/srv/node/sdc1/objects/66216/445/40aa0b832ae8dff8681916972fd13445/1422560956.02659.data
/srv/node/sdc1/objects/142841/960/8b7e465403a5b5017ae51c0c0ab5a960/1422459278.52978.data
/srv/node/sdc1/objects/53083/6af/33d6dc4a65e40f2c539e26649c2d96af/1422459797.37964.data
/srv/node/sdc1/objects/37756/61e/24df3295c06d9770e1cd4f1d15ee861e/1422560823.75913.data
/srv/node/sdc1/objects/206317/924/c97b770dc9f2170f2434631423ccb924/1422560870.83562.data
/srv/node/sdc1/objects/1056/c1d/01081c2d99e3ed7cc3408249335b9c1d/1422560871.31131.data
/srv/node/sdc1/objects/107854/6aa/6953b4ba90867f1b2ee0ff36e8f7d6aa/1422560871.63875.data
/srv/node/sdc1/objects/262004/dfc/ffdd367dd12034d5f3c066845e4d8dfc/1422560873.82851.data
/srv/node/sdc1/objects/71710/393/4607a45373f2b0f6632b2f56501cf393/1422560874.16764.data

In above out put the swift drive is mounted to /srv/node/sdc1.


we can get the date when the data file is created from the name of the data file.

/srv/node/sdc1/objects/71784/771/461a3fd11073d0a88222403d4a7d1771/1422561047.39847.data
[root@compute ~]# date --date @1422561047
Thu Jan 29 14:50:47 EST 2015
[root@compute ~]#

If we have enabled 2 replication is the swift ring configuration there will be  two data file with same name. If we have multiple swift server's the replicated data will be stored in different server's rather than the same server. 

Directory Sharing between Host Machine and Docker

Mount a Host Directory as a Data Volume
 To mount a  host directory on to the container

>>$ sudo docker run -d -P --name web -v /src/webapp:/opt/webapp training/webapp python app.py

This will mount the host directory, /src/webapp, into the container at /opt/webapp

Running a Script in Client Server's using Puppet Master.

Running a Script in Client Server's using Puppet.

Enable the puppet File Server
=============================
Add Following entries to /etc/puppet/fileserver.conf
[extra_files]
path /var/lib/puppet/bucket
allow *


The File is stored in the mentioned path
========================================
[root@master ~]# ll /var/lib/puppet/bucket/
total 4
-rw-r--r--. 1 root root 39 Feb 10 16:45 startup.sh

In the below codes first the scripts is fetched from the master and saved in the local file. and then execute
==============================================================================================================
[root@master ~]# cat /etc/puppet/manifests/site.pp
node "client" {
file { '/tmp/startup.sh':
          owner => 'root',
          group => 'root',
          mode => '700',
          source => 'puppet:///extra_files/startup.sh',
       }
exec    {'run_startup':
        command => '/tmp/startup.sh',
        }
}
[root@master ~]#