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Chairs in my office Once I was chatting with my teammates... Me : "I wonder why it is always necessary to refer to this source, that source, has anyone done it, is there any research? While no problem is the same, no situation is the same. Why not use our own brains to create a whole new one? Why do we have to be the insiders to consult the outsiders? Isn't that very paradoxical?" My teammate : "I agree with your point that no two situations will be exactly the same and that there is no one size fits all. But there's one like this, I don't think it's all the problems we're dealing with that only we can meet. So of course, if I can find a source to refer to first, it's still better. Just like when implementing a software feature, not every problem is the same. But I still have to go check to see if I'm the only one I've met? Or if someone has met me, I have to see if their method suits me before I decide to try it, but I don't blindly ...

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I have recently been trying to use PSMDB (Percona Server for MongoDB) as an open-source and free alternative for MongoDB Enterprise Server. I encountered an issue that the pod could not be initialized successfully with Persistent Volumes using NFS shares. I got the logs from the failed pod as follow: ------ ++ id -u ++ id -g + install -o 1000730000 -g 0 -m 0755 -D /ps-entry.sh /data/db/ps-entry.sh install: cannot change ownership of '/data/db/ps-entry.sh': Operation not permitted ---- I would like to share the steps how I used for debugging. The PSMD StatefulSet was deployed onto my OpenShift 3 OKD. Check the container mount info Go to a pod I could see the mount info as below mongod-data → /data/db read-write - mongod-data: Persistent volume claim name - /data/db: container mounted directory Check Persistent volume binding Go to the storage, I could know which persistent volume was bound to the corresponding persistent volume claim. Bound to volume psmdb-mongodb-data-0 Check P...

Encryption is the most popular tool for securing data both in transit and at rest. - For protecting data in transit, we can configure to use the TLS connection - For protecting data at rest, we can use Percona Server for MongoDB (PSMDB), an open-source alternative for MongoDB Enterprise. License PSMDB Docker images follow the SSPL license. Therefore, it is not a problem when I only have my containers deployed in on-premises environments. Running MongoDB Replication on OpenShift I have successfully installed the replication by following the guide Install Percona Server for MongoDB on OpenShift . In order to make it work properly with my needs, I disabled some features from the default deployment. See the detail in this change Basically, I needed to create a CRD (Custom Resource Definition) to let OpenShift/Kubernetes what PSMDB is. Then, I deployed the Operator pod. Finally, I deployed the PSMDB StatefulSet. I used NFS shares for Persistent Volumes. Create CRD for PSMDB 2 git clone http...