RE: MySBDS - Steem Blockchain Data Service in MySQL

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RE: MySBDS - Steem Blockchain Data Service in MySQL

blervin in #utopian-io • 7 years ago

Yeah, installing mysql locally is fine, but might make it a little confusing since you now have two separate mysql instances running, but this should clarify.

To connect from the droplet itself, we need to look to the docker networking to find the IP the mysql container is running at by running this command:

docker inspect --format "{{ .NetworkSettings.IPAddress }}" steem_mysql

For example, I get 172.17.0.2 as the IP. Then, you can connect using the IP returned from that command:

mysql -h 172.17.0.2 -u root -p

If you are connecting from any remote system, you can just use the public IP of this droplet with the normal port 3306.

7 years ago in #utopian-io by blervin

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twodollars 7 years ago

Thanks for all your help. Since the commands you provided didn't work with my dual-mysql-trying-to-get-phpmyadmin-to-work setup, I destroyed the droplet I had been working on started over (I had to start over more than once because I forgot to increment the volume_name but thanks for your note about incrementing the volume name), and now it seems to be working for me like it is for you. I'm pretty excited because it looks like the hurdles have been removed so I can play around with the steem blockchain in mysql. Note: I tried using steemsql.com a while back but I wasn't able to get that to work with php in linux. Also, with the help of @eonwarped simplifying some Github instructions and pasting some commands for me I was able to get a condenser working which was neat to see, but my main motivation with setting up the condenser was because thought I would enable me to have the steem blockchain in mysql, but I couldn't get mysql working with the condenser, and when I saw the size of the condenser installation I doubted if it had all the blockchain data anyway. In short, I really appreciate there work you did here.

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blervin 7 years ago

Sorry you had to start over but I'm glad you're up and running again. The learning curve here is a little steep but I've ran into most of the problems you'll see so don't hesitate to follow up if you have any other issues.

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twodollars 7 years ago

I'm running into an issue on my fresh install. The command "mysql -h 172.17.0.2 -u root -p" used to work for me during the download or restore phase, but now that I am in the "build/run sdbs" phase, that same mysql command produces the error, "ERROR 2003 (HY000): Can't connect to MySQL server on '172.17.0.2' (113)". I also tried connecting to the database remotely using the droplet IP (instead of 172.17.0.2), and I got a similar error except it mentioned (111) instead of (113). Do I just need to wait for the install script to finish or is there something else I need to do?

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blervin 7 years ago

Check docker to make sure mysql is running:

docker ps

If not, you can try starting it again:

docker start steem_mysql

And if you're still having troubles, you can take a look at logs:

docker logs steem_mysql

This assumes you used the name steem_mysql as specified in my script, change as necessary.

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twodollars 7 years ago

Thanks for helping me with the basics of docker. The "docker ps" showed that steem_mysql wasn't running so I ran "docker start steem_mysql" and then I saw that it was running, but I still couldn't connect so I ran the "docker logs steem_mysql" command and noticed a bunch of recent messages about doing a recovery, but the recovery seemed to finish in about three minutes and after that everything seems to work as expected :)

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blervin 7 years ago

Awesome, glad you got it going!

This all underscores how many 'grey areas' I left ambiguous in here, so I'm putting together a more thorough tutorial that'll go into docker and other details a bit more.

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twodollars 7 years ago

Sorry to keep troubling you. I'm noticing that steem_mysql keeps stopping and gives the following type of error, "Aborted connection 5 to db: 'steem' user: 'root' host: '172.17.0.3' (Got an error reading communication packets)". I keep restarting steem_myslq (I've restarted at least 10 times and probably closer to 20 times) and it was stuck on the lastblock of 20080434 for a long time, and then I checked again and and the lastblock jumped to 20192434. Is having to restart steem_mysql this many times normal?

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blervin 7 years ago

No worries, it's good to document these issues in the blockchain so others can learn too!

Interestingly, this is one issue I have not yet run into. For me, steem_mysql has been running flawlessly, it's the steem_sbds container that has stopped and had issues so far.

My general thoughts are this may be system level issues. How much memory do you have? I've tested this in a 4GB instance and can say it definitely does NOT work with less, at least not reliably.

Also, you mentioned installing other tools so these may also have an impact.

Something to check is to dump all the logs to local files so you can parse and review more easily. Docker makes it a little weird, so use this technique:

docker logs steem_mysql > mysql.log 2>&1
docker logs steem_sbds > sbds.log 2>&1

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