Riak is a bigdata database that is useful to save large amounts of data, the company that offers support for it is named basho.com, there is a lot of tutorials at basho site to install riak and configure.
This is a resume of the steps to setup a quick single node on a riak ring.
It is assumed that zNcrypt is already installed.
To install riak on ubuntu follow steps from:
http://docs.basho.com/riak/latest/tutorials/installation/Installing-on-Debian-and-Ubuntu/
Basically 4 commands are needed:
# curl http://apt.basho.com/gpg/basho.apt.key | sudo apt-key add -
# sudo bash -c "echo deb http://apt.basho.com $(lsb_release -sc) main > /etc/apt/sources.list.d/basho.list"
# sudo apt-get update
# sudo apt-get install riak
Configuring Riak:
You need to modify /etc/riak/app.config and /etc/riak/vm.args
1. Get yout local ip
2. Update vm.args
Change "-name riak@127.0.0." "-name riak@YOUR_IP"
3. update app.config
pb_ip: Replace 127.0.0.1 with the IP address of the Riak node.
From
{pb_ip, "127.0.0.1" }
Change to:
{pb_ip, "xx.xx.xx.xx" }
Then update http to your IP
{http, [ {"127.0.0.1", 8098 } ]}
change to :
{http, [ {"xx.xx.xx.xx", 8098 } ]},
Where xx.xx.xx.xx is your node ip.
4. Create Riak directories
# mkdir /mnt/r
# mkdir/mnt/r/bitcask
/mnt/r/ring and /mnt/r/kv_node are automatically created when riak is started
IMPORTANT: If riask has been started reviously, when updating app.config and vm.args you had changed app.config and vm.args this would make changes at your vk_node so the previous stored information about this cluster not is not updated automatically, remove directories ring, kv_node and bitcask/* (If you already have sensitive data written DON'T remove bitcask/*)
Configuring dmcrypt to encrypt with zNcrypt.
Creating a 1 Gb file:
# sudo dd if=/dev/zero of=1gb.file bs=50M count=20
then losetup
#losetup /dev/loop0 1gb.file
Now prepare device at zNcrypt:
# zncrypt-prepare /dev/loop0 /mnt/dmcrypted
Now enable aes-ni
root@ip-10-191-34-140:/home/ubuntu/basho_bench# modprobe aesni_intel
root@ip-10-191-34-140:/home/ubuntu/basho_bench# lsmod | grep aesni
aesni_intel 55664 0
cryptd 20530 1 aesni_intel
aes_x86_64 17255 1 aesni_intel
then add zncryt acl rule
# zncrypt acl --add --rule="ALLOW @riak * /usr/lib/riak/erts-5.9.1/bin/beam.smp"
Type MASTER passphrase:
1 rule(s) were added
and encrypt:
# zncrypt-move encrypt @riak /var/lib/riak /mnt/dmcrypted
Troubleshooting:
Doesn't respond 'riak ping'?
Make sure about 4 things
1.- check thet there is not already an idle riak priocess running
#psaux | grep riak
If there is something kill it.. Muahaha
2.- Make sure that kv_node, riank and bitcask directories are owned by 'riak' user, if not set it up
3. You probably had not removed previous node config, so remove kv_node, ring and bitcask/*
4. /mnt/r/ should be owned by riak user:
# chown riak:riak /mnt/r
Do you need to execute basho_bench?
If it is required to create the graphics you might see follow issue:
ubuntu@ip-10-68-22-201:~/basho_bench$ make results
priv/summary.r -i tests/current
/usr/bin/env: Rscript --vanilla: No such file or directory
make: *** [results] Error 127
ubuntu@ip-10-68-22-201:~/basho_bench$
To resolve it you can find the fix at:
https://github.com/basho/basho_bench
In short
If make results fails with the error /usr/bin/env: Rscript –vanilla: No such file or directory please edit priv/summary.r and replace the first line with the full path to the Rscript binary on your system
In my case it is:
#!/usr/bin/env Rscript --vanilla
ubuntu@ip-10-68-22-201:~/basho_bench$ RscriptThe program 'Rscript' is currently not installed. You can install it by typing:
#sudo apt-get install r-base-core
ubuntu@ip-10-68-22-201:~/basho_bench$ apt-get install r-base-core
ubuntu@ip-10-68-22-201:~/basho_bench$ which Rscript
/usr/bin/Rscript
#!/usr/bin/Rscript --vanilla
Then execute:
#sudo make results
If you see an error like:
The downloaded packages are in
‘/tmp/RtmplnrfYR/downloaded_packages’
Loading required package: methods
Error: could not find function "getopt"
Execution halted
make: *** [results] Error 1
ubuntu@ip-10-68-22-201:~/basho_bench$
Ths is ok, just try to make results again.
There you go, your graphics are there:
ubuntu@ip-10-68-22-201:~/basho_bench$ ls tests/current/
console.log.0 error.log.0 get_latencies.csv summary.csv update_latencies.csv
crash.log.0 errors.csv log.sasl.txt summary.png voxer300.config
Enjoy!
P.S. The most important flag we live for, doesn't exist.
