Posts published under the Open source Team account are collective contributions by the dbi services open infrastructure consultants. The practice covers open-source databases and platforms, PostgreSQL first of all, along with MySQL, MariaDB, and Linux, from architecture, replication, and high availability to performance tuning and operations under service level agreements, and contributes actively to the PostgreSQL community.
As I am currently preparing my session for the Swiss PGDay which is about some of the new features for PostgreSQL 11, I though this one is worth a blog post as well. Up to PostgreSQL 10 when you add a column to table which has a non null default value the whole table needed to be rewritten. With PostgreSQL…
This blog refers to an older version of EDB’s Postgres on Kubernetes offering that is no longer available. In the last post we had a look at the basic configuration of EDB EFM and confirmed that we can do manual switchovers for maintenance operations. Being able to do a switchover and switchback is fine but what really is important are…
This blog refers to an older version of EDB’s Postgres on Kubernetes offering that is no longer available. In the last three posts we deployed an EDB database container and two pgpool instances, scaled that up to include a read only replica and finally customized the PostgreSQL instance with ConfigMaps. In this post will we look at how the EDB…
This blog refers to an older version of EDB’s Postgres on Kubernetes offering that is no longer available. In the last two posts we deployed an EDB database container and two pgpool instances and then scaled that up to include a read only replica. In this post will use a ConfigMap to adjust parameters in postgresql.conf as you will probably…
This blog refers to an older version of EDB’s Postgres on Kubernetes offering that is no longer available. When you followed the last post you should have two pgpool instances and one EDB Postgres instance running in OpenShift. pgpool is responsible for the load balancing, meaning: Send write requests to the master instance and spread read requests over all instances.…
This blog refers to an older version of EDB’s Postgres on Kubernetes offering that is no longer available. In this post we’ll look at how we can deploy EnterpriseDB containers in MiniShift. When you need to setup MiniShift have a look here. In this post we’ll do the setup with the MiniShift console, in a next post we’ll do the…
It can be interesting to see how uids between the docker host and docker containers are mapped. For example, for security concerns. As a reminder, docker containers are based on two linux kernel features: linux namespaces and cgroups. Basically, linux namespaces provide isolation for running processes and cgroups allows you to isolate resource usage. Let’s first run a docker container.…
The last post quickly outlined on how you can setup MiniShift for playing around with OpenShift on your workstation. In this post we’ll setup PostgreSQL in MiniShift using the default PostgreSQL image that already comes with MiniShift. When MiniShift is currently stopped start it up: dwe@box:~$ minishift start dwe@box:~$ eval $(minishift oc-env) dwe@box:~$ which oc /home/dwe/.minishift/cache/oc/v3.9.0/linux/oc With OpenShift everything is…
Currently we have many requests to support customers in running PostgreSQL in Docker containers. Some of those use redhat OpenShift as the management platform for their Docker deployments. Setting up an OpenShift cluster requires quite some resources and is nothing you want to do on your workstation usually. To overcome that you can use MiniShift which launches a one node…
Puh, that last post in this series is already half a year old. Time is moving too fast 🙁 Today, while being at a customer again, this question came up: Can I do something comparable in PostgreSQL to what I can do in Oracle, which is: Create a user and provide the hashed password so that the password is the…
Finally I am home from pgconf.de in Berlin at the beautiful Müggelsee. Beside meeting core PostreSQL people such Devrim and Bruce, Andreas and joining Jan again for great discussions and some beers, joking with Anja, being at the dbi services booth, discussing with people, kidding with Hans: was it worth the effort? Yes, it was, and here is why. We…
I was working on MySQL upgrades to version 5.7 at a customer, when I found out that for my instance, time in the error log file didn’t correspond to local system time: mysql@test1:/u01/app/mysql/admin/mysqld1/log/ [mysqld1] mysql -uroot -p Enter password: ERROR 1045 (28000): Access denied for user ‘root’@’localhost’ (using password: YES) mysql@test1:/u01/app/mysql/admin/mysqld1/log/ [mysqld1] ls -ltr mysqld1.err -rw-r—–. 1 mysql mysql 13323…
