Skip to main content

PSMDB - A MongoDB alternative for having Encryption At Rest


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

2git clone https://github.com/percona/percona-server-mongodb-operator 3cd percona-server-mongodb-operator 4 5# create Custom Resource Definition (CRD) with cluster-admin role 6# This task is needed to executed once 7oc apply -f deploy/crd.yaml

Deploy the Operator pod

2oc new-project psmdb 3 4# Add role-based access control (RBAC) 5oc apply -f deploy/rbac.yaml 6 7# deploy operator pod 8oc apply -f deploy/operator.yaml 9 10# Add secret 11oc create -f deploy/secrets.yaml

Create SealedSecret for local keyfile

(Assumed that SealedSecret is installed and ready for use)

By default, the operator generates a normal Kubernetes secret with the name "my-cluster-name-mongodb-encryption-key". This secret is automatically attached to the MongoDB StatefulSet and persisted as a file through volumes. The operator also handles passing the files to "mongod" command in the container entry point. We can replace the secret in the deployment templates "deploy/cr.yaml". For example:

1 security 2 enableEncryption: true 3 encryptionKeySecret: mongodb-encryption-key 4 encryptionCipherMode: AES256-CBC

Here is an example to create a SealedSecret "mongodb-encryption-key" locally and apply it to the project.
1 $ openssl rand -base64 32 > mongodb-keyfile 2$ cat mongodb-keyfile | kubectl create secret generic mongodb-encryption-key \ 3--dry-run=client --from-file=encryption-key=/dev/stdin \ 4-o yaml > mongodb-encryption-secret.yaml 5$ kubeseal < mongodb-encryption-secret.yaml > mongodb-encryption-sealed-secret.yaml 6$ oc create -f mongodb-encryption-sealed-secret.yaml

Install PSMDB StatefulSet

(Assumed that NFS is installed and ready for use)

Create NFS shares: data-0, data-1, and data-2. Here is a sample command for data-0
1$> ssh someuser@files.example.com.local 2$> sudo mkdir /srv/data/psmdb/mongodb/data-0 3$> sudo chown nfsnobody:0 /srv/data/psmdb/mongodb/data-0 4$> sudo chmod go+w /srv/data/psmdb/mongodb/data-0 5$> sudo chmod g+s /srv/data/psmdb/mongodb/data-0

The directory attributes should look like

drwxrwsrwx. 5 nfsnobody root 4096 Jun 24 03:31 data-0

drwxrwsrwx. 5 nfsnobody root 4096 Jun 24 03:30 data-1

drwxrwsrwx. 5 nfsnobody root 4096 Jun 24 03:31 data-2

Create corresponding Persistent Volumes with NFS shares
1kind: PersistentVolume 2apiVersion: v1 3metadata: 4 name: psmdb-mongodb-data-0 5spec: 6 capacity: 7 storage: 2Gi 8 nfs: 9 server: files.example.com.local 10 path: /srv/data/psmdb/mongodb/data-0 11 accessModes: 12 - ReadWriteOnce 13 persistentVolumeReclaimPolicy: Recycle 14 storageClassName: psmdb 15

Install the PSMDB StatefulSet
1 $> oc apply -f deploy/cr.yaml
Labels:

Comments

Post a Comment

Popular posts from this blog

[Snippet] CSS - Child element overlap parent

I searched from somewhere and found that a lot of people says a basic concept for implementing this feature looks like below: HTML code: <div id="parent">  <div id="child">  </div> </div> And, CSS: #parent{   position: relative;   overflow:hidden; } #child{   position: absolute;   top: -1;   right: -1px; } However, I had a lot of grand-parents in my case and the above code didn't work. Therefore, I needed an alternative. I presumed that my app uses Boostrap and AngularJs, maybe some CSS from them affects mine. I didn't know exactly the problem, but I believed when all CSS is loaded into my browser, I could completely handle it. www.tom-collinson.com I tried to create an example to investigated this problem by Fiddle . Accidentally, I just changed: position: parent; to position: static; for one of parents -> the problem is solved. Look at my code: <div class="modal-body dn-placeholder-parent-positi...
Post a Comment
Read more

Junit - Test fails on French or German string assertion

In my previous post about building a regex to check a text without special characters but allow German and French . I met a problem that the unit test works fine on my machine using Eclipse, but it was fail when running on Jenkins' build job. Here is my test: @Test public void shouldAllowFrenchAndGermanCharacters(){ String source = "ÄäÖöÜüß áÁàÀâÂéÉèÈêÊîÎçÇ"; assertFalse(SpecialCharactersUtils.isExistSpecialCharater(source)); } Production code: public static boolean isExistNotAllowedCharacters(String source){ Pattern regex = Pattern.compile("^[a-zA-Z_0-9_ÄäÖöÜüß áÁàÀâÂéÉèÈêÊîÎçÇ]*$"); Matcher matcher = regex.matcher(source); return !matcher.matches(); } The result likes the following: Failed tests: SpecialCharactersUtilsTest.shouldAllowFrenchAndGermanCharacters:32 null A guy from stackoverflow.com says: "This is probably due to the default encoding used for your Java source files. The ö in the string literal in the J...
5 comments
Read more

Automating deployment and managing apps on OpenShift

Previously, we maintained OpenShift templates for deploying apps in development environments as well as delivering these templates to our customers for their on-prem deployment. Customers who refer to our templates (as well as documentation) have their own configuration management tools to automate the deployment such as ArgoCD and FluxCD. My son's buildings Our developers usually modify templates (YAML) directly on OpenShift for testing and then adjust the corresponding templates stored in the Git repository in Bitbucket. This sometimes causes an issue that delivered templates are incorrect because: - Developers forget to update the templates in Git repositories. - Developers don’t test the templates Therefore, our goal was to integrate a tool into our CI/CD that can automate and manage the configuration of OpenShift apps. The delivered templates should be the ones that are able to run on our OpenShift with the following purposes: - Automate deployment from templated in Git repos...
Post a Comment
Read more

Installing NGINX on macOS

I have heard of a lot of NGINX recently. One of them was it can help for security issues; for sure, it much be more. It so happens that our team has got a ton of user stories from a security audit. It's time to delve into it. What is NGINX? In order to get a basic idea and have some fun , I've just picked some available posts from my favorite Vietnamese blogger communities as below: https://kipalog.com/posts/Cau-hinh-nginx-co-ban---Phan-1 https://viblo.asia/hoang.thi.tuan.dung/posts/ZabG912QGzY6 NGINX (pronounce: Engine-X) is a web server (comparing to IIS, Apache). It can be used as a reverse proxy ( this is what I need for security issues with configuration ), load balancer and more. How to get started? I found the below path for learning NGINX by googling "learn nginx": https://www.quora.com/What-are-some-good-online-resources-to-learn-Nginx In this post, I only went first step. This is installing NGINX on macOS and taking a first look at the confi...
Post a Comment
Read more

Coding Exercise, Episode 1

I have received the following exercise from an interviewer, he didn't give the name of the problem. Honestly, I have no idea how to solve this problem even I have tried to read it three times before. Since I used to be a person who always tells myself "I am not the one good at algorithms", but giving up something too soon which I feel that I didn't spend enough effort to overcome is not my way. Then, I have sticked on it for 24 hours. According to the given image on the problem, I tried to get more clues by searching. Thanks to Google, I found a similar problem on Hackerrank (attached link below). My target here was trying my best to just understand the problem and was trying to solve it accordingly by the Editorial on Hackerrank. Due to this circumstance, it turns me to love solving algorithms from now on (laugh). Check it out! Problem You are given a very organized square of size N (1-based index) and a list of S commands The i th command will follow t...
2 comments
Read more