docker-base | get process supervision and startup mechanisms | Continuous Deployment library
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kandi X-RAY | docker-base Summary
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QUESTION
I'm trying to create a Windows Docker container using Kaniko/Gitlab.
Here is the Error I see:
ANSWER
Answered 2021-May-21 at 15:00You have the error:
QUESTION
I have both Airflow 2 (the official image) and Apache Spark running in a docker-compose pipeline.
I would like to execute a DAG triggering a Spark script by means of the SparkSubmitOperator
(https://airflow.apache.org/docs/apache-airflow/1.10.14/_api/airflow/contrib/operators/spark_submit_operator/index.html), but I fail; in the Airflow web server, I can see the following log:
ANSWER
Answered 2021-May-16 at 22:14I finally managed to get it running by installing Java on the AirflowWorker container, as suggested by @floating_hammer.
See How to install java in an airflow container using docker-compose.yaml for details.
QUESTION
I want to connect superset with a mysql database, which contains a table with some greek letters (utf8).
When I install superset from scratch it works fine, displaying the greek letters correctly.
When I install I choose the docker installation, it displays ??? where the greek letters are. Notice that in the docker version, I install the the drivers with echo "mysqlclient" >> ./docker/requirements-local.txt
, as it is recommended in the documentation.
The connection string I use in both cases is mysql://:@/
Any idea why this problem with the encoding, only in the docker-based version?
...ANSWER
Answered 2021-Mar-22 at 10:56The encoding problem is solved using mysql-connector-python
drivers, instead of the default mysqlclient
!
- Append
mysql-connector-python
to./docker/requirements-local.txt
- from superset, connect to
mysql
with this driver, using the followingsqlalchemy
urimysql+mysqlconnector://:@[:]/
QUESTION
I have a project that uses Docker Compose to package mysql, Keycloak, and an html front end. The application was originally intended for multiple users but desire has been expressed to use it like a standalone desktop executable application. I was wondering if something like Electron could provide a means to accomplish this.
Does any have any experience packaging a Docker-based web application as a standalone desktop applcation? How feasible and difficult might it be?
...ANSWER
Answered 2021-Jan-29 at 00:11It's not really feasible:
- The end user would have to have the Docker runtime installed, which isn't a normal external dependency for a desktop application;
- The setup to run GUI applications in Docker is complicated and very platform-dependent (on non-Linux you need extra host-side software);
- Running Docker containers requires administrator-level permissions, since you can use a bind mount to edit arbitrary files on the host, but desktop applications don't usually have that.
(In principle you could work around all of these things, but Docker is intended to run as a system daemon and isn't designed to be embedded in other applications.)
The most straightforward packaging approach for this would be to publish the images to Docker Hub or another publicly-accessible repository, and to publish the docker-compose.yml
file that launches the containers. Then an end user would need to install Docker, download the docker-compose.yml
file, run docker-compose up -d
, and point their browser to a specific URL to reach the front-end. That's less user-friendly than a standalone installer, but it is a small specific set of steps to run the application.
If you can restructure the application to use an embedded database like SQLite, and as a desktop application you don't need a federated login system, then you could also probably rebuild this whole thing as a native Electron application, without involving Docker at all.
QUESTION
I try to execute a transactional operation and intentionally throw an exception in order to verify if a rollback is done but the rollback isn't being executed.
The PostgreSQL database version is 12.1-1 and is Docker-based.
Here is the service that contains the @Transactional
annotation:
ANSWER
Answered 2021-Jan-12 at 02:26I examined the architecture that you want to use multiple schemas (data sources, jdbc templates) in a single application. @Transactional
only manages application's default data source that is named HikariPool-1
. When you call the rest method, new hikari pool will be created that is named HikariPool-2
. Your operations are on HikariPool-2
, but @Transactional
manages only HikariPool-1
.
@Transactional
's transaction manager argument can not be changed dynamically. So, you can define a new custom annotation that manages your transactions. Or you can use TransactionTemplate
instead of annotations.
I created a simple custom transaction management aspect. It is working with defined dao's data source and transaction lifecycle.
Test ServiceQUESTION
I used kartoza's docker images for Geoserver and Postgis and started them in two docker containers using the provided docker-compose.yml:
...ANSWER
Answered 2020-Oct-07 at 11:42just add the network_mode
in YAML in db and geoserver and set it to host
QUESTION
My app has a Flask backend and an Angular/Electron frontend. The app runs locally on Mac Catalina. Flask, Celery and Redis are in separate docker containers, while the frontend is outside Docker. The Flask container is listening on port 0.0.0.0:5078. I've set CORS policy to allow messages from "127.0.0.1:4200" only, sent by the frontend. There's no need for internet connections. The backend containers will be launched by the frontend by emulating a terminal command. I'll install the app remotely on non-technical users' Catalina MacBooks.
Question: According to Docker might be exposing ports to the world, Beware of exposing ports in Docker and Docker not blocked by macOS firewall, this use of 0.0.0.0:5078 is a security threat. How can I resolve this threat, eg by block ing any external connections to this port?
Here's some python 3.8 code
...ANSWER
Answered 2020-Sep-12 at 19:14A working solution is based on the David Maze and Matt's comments and on this question. These are the steps:
- Open Docker for Mac, Preferences and Docker Engine. Add
"ip": "127.0.0.1"
to the json config file. - In the docker-compose, set
ports
to"127.0.0.1:5078:5078"
for theweb
service. - Leave the Dockerfile and the python code as before: ie, the flask host is still
0.0.0.0
As I checked, messages from Electron's localhost 4201 went through. Also, running netstat -anvp tcp | awk 'NR<3 || /LISTEN/
shows that the insecure port 0.0.0.0.5078
is no longer exposed to the outside.
`
QUESTION
So I whipped up a docker-based fluentd TCP log collector.
Following the examples here, https://docs.fluentd.org/input/tcp , led to successfully sending a line from my host Win 10 WSL (Debian) by saying
...ANSWER
Answered 2020-Aug-27 at 16:14Try sending a \r\n
or \0
at the end of your message. The message is being sent as bytes over the network so it's probably being stored in buffers and the code reading the buffer needs a way to know the message is over. The regex is also matching on line terminators so will be necessary I think there as well.
QUESTION
Second dependency in goal first-deploy
not executed.
if I execute make first-deploy
, make execute only first dependence - build-proxy-base
with success result and exit.
Makefile:
...ANSWER
Answered 2020-Jun-04 at 18:10Make definitely considered the second dependency. If it didn't "execute" then it means make decided nothing needed to be done to execute it.
I can see this:
QUESTION
I have a configuration where I want to return a custom error from within a named location. However, instead I receive the standard nginx error page. I can get the custom error from a non-named location though.
To reproduce the issue, I created this simple docker-based setup:
Dockerfile:
...ANSWER
Answered 2020-Mar-24 at 07:45While exploring the problem, I found out about recursive_error_pages on;
-- but stupidly left it commented. Naturally it didn't help.
Un-commenting that directive fixes the issue!
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