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What is Convertigo Low Code Platform ?

Convertigo is an open source fullstack Low Code & No Code platform. The platform is used to build Enterprise Web & Mobile apps in a few days. Convertigo platform is composed of several components:

  1. Convertigo Server: The back-end server part. Handles back-end connectors, micro-services execution, offline data device synchronization and serves Web & Mobile Web apps. Runs as a Docker container with the convertigo image
  2. Convertigo Studio: Runs on a Windows or a MacOS workstation, Eclipse based IDE, used to program Back-end micro-services workflows and use the "Mobile Builder" edition to build Mobile & Web apps UIs in a MXDP (Multi eXperience Development Platform) Low code mode. Can be directly downloaded from Sourceforge.net
  3. Convertigo SDKs: Can be used with third party Client Web & Mobile development tools such as Xcode (iOS) Android Studio (Android) Angualr, Vue.js or plain js . SDKS are available on each platform standard repository (Bintray for Android, Cocoapods for iOS and Nuget for .NET)
  4. Convertigo Forms: The No Code App Builder to build form based apps as PWAs or Web applications with a Web Based NoCode studio intented for non technical developpers (Citizen Developpers)

Convertigo Community edition brought to you by Convertigo SA (Paris & San Francisco). The platform is currently used by more than 100K developers worldwide, building enterprise class mobile apps.

www.convertigo.com

%%LOGO%%

How to use this image

Quick start

$ docker run --name C8O -d -p 28080:28080 %%IMAGE%%

This will start a container running the minimum Convertigo server. Convertigo uses images' /workspace directory to store configuration file and deployed projects as an Docker volume.

You can access the Server admin console on http://[dockerhost]:28080/convertigo and login using the default credentials: admin / admin

Link Convertigo to a CouchDB database for FullSync (Convertigo EE only)

Convertigo FullSync module uses Apache CouchDB 2.3.1 as NoSQL repository. You can use the couchdb docker image and link to it convertigo this way

Launch CouchDB container and name it 'fullsync'

$ docker run -d --name fullsync couchdb:2.3.1

Then launch Convertigo and link it to the running 'fullsync' container. Convertigo Low Code sever will automatically use it as its fullsync repository.

$ docker run -d --name C8O --link fullsync:couchdb -p 28080:28080 %%IMAGE%%

Link Convertigo Low Code Server to a Billing & Analytics database

MySQL

MySQL is the recommended database for holding Convertigo MBaaS server analytics. You can use this command to run convertigo and link it to a running MySQL container. Change [mysql-container] to the container name, and [username for the c8oAnalytics db], [password for specified db user] with the values for your MySQL configuration.

$ docker run -d --name C8O --link [mysql-container]:mysql -p 28080:28080                             \
    -e JAVA_OPTS="-Dconvertigo.engine.billing.enabled=true                                           \ 
            -Dconvertigo.engine.billing.persistence.jdbc.username=[username for the c8oAnalytics db] \
            -Dconvertigo.engine.billing.persistence.jdbc.password=[password for specified db user]   \
            -Dconvertigo.engine.billing.persistence.jdbc.url=jdbc:mysql://mysql:3306/c8oAnalytics"   \
%%IMAGE%%

Where is Convertigo Low Code server storing deployed projects

Projects are deployed in the Convertigo workspace, a simple file system directory. You can map the docker container /workspace to your physical system by using :

$ docker run --name C8O -v $(pwd):/workspace -d -p 28080:28080 %%IMAGE%%

You can share the same workspace by all Convertigo containers. In this case, when you deploy a project on a Convertigo container, it will be seen by others. This is the best way to build multi-instance load balanced Convertigo server farms.

Be sure to have a really fast file sharing between instances !!! We have experienced that Azure File Share is not fast enough

To avoid log and cache mixing, you have to add 2 variables for instance specific paths:

-Dconvertigo.engine.cache_manager.filecache.directory=/workspace/cache/[instance name]
-Dconvertigo.engine.log4j.appender.CemsAppender.File=/workspace/logs/[instance name]/engine.log

Make image with pre-deployed projects

If you want to make a vertical image ready to start with your application inside, you have to have your built projects .car files next to your Dockerfile:

FROM %%IMAGE%%
COPY myProject.car /usr/local/tomcat/webapps/convertigo/WEB-INF/default_user_workspace/projects/
COPY myDependency.car /usr/local/tomcat/webapps/convertigo/WEB-INF/default_user_workspace/projects/

Migrate from an earlier version of Convertigo Low Code Platform

  • Stop the container to perform a backup. And just back the workspace directory. This will backup all the projects definitions and some project data.
  • Start a new Convertigo docker container mapping the workspace
  • All the workspace (Projects) will be automatically migrated to the new Convertigo MBaaS version

Security

The default administration account of a Convertigo server is admin / admin and the testplatform is anonymous.

These accounts can be configured through the administration console and saved in the workspace.

CONVERTIGO_ADMIN_USER and CONVERTIGO_ADMIN_PASSWORD Environment variables

You can change the default administration account :

$ docker run -d --name C8O -e CONVERTIGO_ADMIN_USER=administrator -e CONVERTIGO_ADMIN_PASSWORD=s3cret -p 28080:28080 %%IMAGE%%

CONVERTIGO_TESTPLATFORM_USER and CONVERTIGO_TESTPLATFORM_PASSWORD Environment variables

You can lock the testplatform by setting the account :

$ docker run -d --name C8O -e CONVERTIGO_TESTPLATFORM_USER=tp_user -e CONVERTIGO_TESTPLATFORM_PASSWORD=s3cret -p 28080:28080 %%IMAGE%%

JAVA_OPTS Environment variable

Convertigo is based on a Java process with some defaults JVM options. You can override our defaults JVM options with you own.

Add any Java JVM options such as -D[something] :

$ docker run -d --name C8O -e JAVA_OPTS="-DjvmRoute=server1" -p 28080:28080 %%IMAGE%%

Here the list of convertigo specific properties (don't forget the -Dconvertigo.engine. prefix).

JXMX Environment variable

Convertigo tries to allocate this amount of memory in the container and will automatically reduce it until the value is compatible for the Docker memory constraints. Once the best value found, it is used as -Xmx=${JXMX}m parameter for the JVM.

The default JXMX value is 2048 and can be defined :

$ docker run -d --name C8O -e JXMX="4096" -p 28080:28080 %%IMAGE%%

COOKIE_PATH Environment variable

Convertigo generates a JSESSIONID to maintain the user session and stores in a cookie. The cookie is set for the server path / by default. In case of a front server with multiple services for different paths, you can set a path restriction for the cookie with the JSESSIONID. Just define the COOKIE_PATH environment variable with a compatible path.

The default COOKIE_PATH value is / and can be defined :

$ docker run -d --name C8O -e COOKIE_PATH="/convertigo" -p 28080:28080 %%IMAGE%%

COOKIE_SECURE Environment variable

Convertigo use a cookie to maintain sessions. Requests on port 28080 are HTTP but we advice to use an HTTPS front for production (nginx, kubenetes ingress, ...). In this case, you can secure yours cookies to be used only with secured connections by adding the Secure flag.

The Secure flag can be enabled by setting the COOKIE_SECURE environment variable to true. Once enabled, cookies and sessions aren't working through an HTTP connection.

The default COOKIE_SECURE value is false and can be defined :

$ docker run -d --name C8O -e COOKIE_SECURE="true" -p 28080:28080 %%IMAGE%%

COOKIE_SAMESITE Environment variable

Allow to configure the SameSite parameter for generated cookies. Can be empty, none, lax or strict.

The default COOKIE_SAMESITE value is empty and can be defined this way:

$ docker run -d --name C8O -e COOKIE_SAMESITE=lax -p 28080:28080 %%IMAGE%%

SESSION_TIMEOUT Environment variable

Allow to configure the default Tomcat session-timeout in minutes. This value is used for non-project calls (Administration console, Fullsync...). This value is overridden by each projects' calls (Sequence, Transaction ...).

The default SESSION_TIMEOUT value is 30 and can be defined this way:

$ docker run -d --name C8O -e SESSION_TIMEOUT=5 -p 28080:28080 %%IMAGE%%

DISABLE_SUDO Environment variable

The image include sudo command line, configured to allow the convertigo user to use it without password and to perform some root action inside the container. This variable allow to disable this permission.

The default DISABLE_SUDO value is empty and can be defined this way:

$ docker run -d --name C8O -e DISABLE_SUDO=true -p 28080:28080 %%IMAGE%%

Pre configurated Docker compose stack

You can use this stack to run a complete Convertigo Low Code server with FullSync repository and MySQL analytics in a few command lines.

$ mkdir c8oMBaaS
$ cd c8oMBaaS
$ wget https://raw.githubusercontent.com/convertigo/docker/master/compose/mbaas/docker-compose.yml
$ docker-compose up -d