Jupyter PDF export not working

[egonw]

.. bc pandoc is not installed.

Reproduce by making a simple python 3 notebook and selecting Export as PDF.

[GrahamDumpleton]

Installation of pandoc requires a docker build phase to install since need to use system package.

Have done this before like:

        {
            "kind": "ImageStream",
            "apiVersion": "v1",
            "metadata": {
                "name": "${APPLICATION_NAME}-nb-s2i",
                "labels": {
                    "app": "${APPLICATION_NAME}"
                }
            }
        },
        {
            "kind": "BuildConfig",
            "apiVersion": "v1",
            "metadata": {
                "name": "${APPLICATION_NAME}-nb-s2i",
                "labels": {
                    "app": "${APPLICATION_NAME}"
                }
            },
            "spec": {
                "triggers": [
                    {
                        "type": "ConfigChange"
                    },
                    {
                        "type": "ImageChange"
                    }
                ],
                "source": {
                    "type": "Git",
                    "git": {
                        "uri": "https://github.com/jupyter-on-openshift/jupyter-notebooks.git",
                        "ref": "1.0.1"
                    },
                    "contextDir": "minimal-notebook"
                },
                "strategy": {
                    "type": "Source",
                    "sourceStrategy": {
                        "from": {
                            "kind": "ImageStreamTag",
                            "name": "${PYTHON_IMAGE_NAME}",
                            "namespace": "openshift"
                        },
                        "env": [
                            {
                                "name": "UPGRADE_PIP_TO_LATEST",
                                "value": "true"
                            },
                            {
                                "name": "JUPYTER_INSTALL_LAB",
                                "value": "${JUPYTERHUB_ENABLE_LAB}"
                            }
                        ]
                    }
                },
                "output": {
                    "to": {
                        "kind": "ImageStreamTag",
                        "name": "${APPLICATION_NAME}-nb-s2i:latest"
                    }
                },
                "resources": {
                    "limits": {
                        "memory": "3Gi"
                    }
                }
            }
        },
        {
            "kind": "ImageStream",
            "apiVersion": "v1",
            "metadata": {
                "name": "${APPLICATION_NAME}-nb-bld",
                "labels": {
                    "app": "${APPLICATION_NAME}"
                }
            }
        },
        {
            "kind": "BuildConfig",
            "apiVersion": "v1",
            "metadata": {
                "name": "${APPLICATION_NAME}-nb-bld",
                "labels": {
                    "app": "${APPLICATION_NAME}"
                }
            },
            "spec": {
                "triggers": [
                    {
                        "type": "ConfigChange"
                    },
                    {
                        "type": "ImageChange"
                    }
                ],
                "source": {
                    "type": "Git",
                    "git": {
                        "uri": "https://github.com/jupyter-on-openshift/poc-hub-singapore-ntu.git"
                    },
                    "contextDir": "notebook"
                },
                "strategy": {
                    "type": "Docker",
                    "dockerStrategy": {
                        "from": {
                            "kind": "ImageStreamTag",
                            "name": "${APPLICATION_NAME}-nb-s2i:latest"
                        }
                    }
                },
                "output": {
                    "to": {
                        "kind": "ImageStreamTag",
                        "name": "${APPLICATION_NAME}-nb-bld:latest"
                    }
                },
                "resources": {
                    "limits": {
                        "memory": "3Gi"
                    }
                }
            }
        },
        {
            "kind": "ImageStream",
            "apiVersion": "v1",
            "metadata": {
                "name": "${APPLICATION_NAME}-nb-img",
                "labels": {
                    "app": "${APPLICATION_NAME}"
                }
            }
        },
        {
            "kind": "BuildConfig",
            "apiVersion": "v1",
            "metadata": {
                "name": "${APPLICATION_NAME}-nb-img",
                "labels": {
                    "app": "${APPLICATION_NAME}"
                }
            },
            "spec": {
                "triggers": [
                    {
                        "type": "ConfigChange"
                    },
                    {
                        "type": "ImageChange"
                    }
                ],
                "source": {
                    "type": "Git",
                    "git": {
                        "uri": "${NOTEBOOK_REPOSITORY_URL}",
                        "ref": "${NOTEBOOK_REPOSITORY_REFERENCE}"
                    },
                    "contextDir": "${NOTEBOOK_REPOSITORY_CONTEXT_DIR}"
                },
                "strategy": {
                    "type": "Source",
                    "sourceStrategy": {
                        "from": {
                            "kind": "ImageStreamTag",
                            "name": "${APPLICATION_NAME}-nb-bld:latest"
                        },
                        "env": [
                            {
                                "name": "JUPYTER_MASTER_FILES",
                                "value": "/opt/app-root/master"
                            }
                        ]
                    }
                },
                "output": {
                    "to": {
                        "kind": "ImageStreamTag",
                        "name": "${APPLICATION_NAME}-nb-img:latest"
                    }
                },
                "resources": {
                    "limits": {
                        "memory": "3Gi"
                    }
                }
            }
        }

The repo for the docker build phase can then install extra system packages from the Dockerfile.

I know a long time ago I was installing pandoc when building my own images using docker on CentOS images. I can't remember if had issues. Probably more a case I didn't know what it was in there for. Either way, wasn't being installed when doing S2I builds as can't install extra system packages and thus why need docker build phase.

[tdudgeon]

I tried enabling PDF export for a notebook and it seemed to required adding a huge number of packages which make the images size much bigger. A whole lot of things like LaTex support was added. I'm not sure if there is a more lightweight approach to this.

[egonw]

Okay, so not a bug, but a feature.