hi all - any tips/inspiration for how to reconcile dbt tags vs dagster asset groups when it comes to asset selection? Each asset can only belong to one group whereas a dbt model may have many tags.

If i wanted to add tags to just backfills launched from dagit by default, where would I need to add the tags in the job definition code?

does dagster have startup hooks/init hooks? for running database migrations and such? (i guess that would just go in the repository function?)

Hi everyone, Is there a limit to the pipeline duration in dagster?

Hello 👋, I am quite new to dagster and was wondering whether is it possible to pass values to

k8s_job_op

dynamically: https://docs.dagster.io/_apidocs/libraries/dagster-k8s#ops For example my op would look something like this:

make_magic = k8s_job_op.configured(
    {
        "image": "my_image",
        "args": ["python3", "script.py"],
        "env_vars": [
            "ENV_VAR_1",
            "ENV_VAR_2"
        ]
        "image_pull_secrets": [{"name": "secret1"}],
    },
    name="make_magic",
)

and I would like to reuse this op by somehow passing the

image

,

args

and

env_vars

values. Is it possible to achieve that? Maybe

k8s_job_op

could somehow access

resources

?

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Hi, when I use materialize() results are stored in DagsterInstance.temp_storage. Can this behaviour be changed such that results are stored in local_artifact_storage? [SOLVED]

Hi, question about the DockerRunLauncher. My dagit, dagster, postgresdb and user code server are configured in my docker-compose with a network "docker_network". Communication works fine. My setup is accordingly to the docker-deploy example https://github.com/dagster-io/dagster/tree/master/examples/deploy_docker Now I wanted to use the DockerRunLauncher, but I encounter an error. If i don't specify a network in the dagster.yaml and start a job, the container will be created and starts, but will throw errors because it can't connect to my postgres container. (Cant resolve the hostname because no network) If I specify a network in the dagster.yaml, to ensure that the hostname of my postgres can be resolved, I get following error:

docker.errors.NotFound: 404 Client Error for <http+docker://localhost/v1.41/containers/7d273d70cfca87e7f2e292ff71a4277e64eaeb7f62a963594b2b1bcdb0335912/start>: Not Found ("network docker_network not found")

Why does the networking not work? This is my dagster.yaml

run_launcher:
  module: dagster_docker
  class: DockerRunLauncher
  config:
    env_vars:
      - DAGSTER_POSTGRES_USER
      - DAGSTER_POSTGRES_PASSWORD
      - DAGSTER_POSTGRES_DB
    network: docker_network
    container_kwargs:
      volumes: # Make docker client accessible to any launched containers as well
        - /var/run/docker.sock:/var/run/docker.sock

Hello! As mentioned elsewhere, we encounter an issue while trying to update an ECS cluster with Dagster running on it. The daemon task seems to start, then stop, then restart again in a loop. Sensors and Scheduler are dead. Backfill and Run queue are fine. We can launch individual runs (they are started by the daemon in between restarts). We are running Dagster 1.0.5. Hints : • We push the code using a CI tool that update containers one after the other. Apparently, the daemon container runs just fine up until Dagit is updated. Then sensors and shedules seem to fail. So it might be that the problem occurs between Dagit and the daemon, not within the daemon container by itself. • A rollback to a previous commit runs ok. But adding new work seems to cause the issue. The new work adds three new repositories (10 in total) and ~50 jobs (150 in total). Then we have a sensor and a schedule for each job. Is it possible that there are too many sensors and schedules for the daemon to handle? It seems to be ok in local tough. Daemon is 2 vCPU and 4 Go RAM I can gladly provide more details if necessary

Hi team, Is there a “finally” concept for ops such that regardless whether or not I raise a failure it will run a “cleanup” op? And bit of help is greatly appreciated!

ok here's a twist:

context.job_def.graph.name

returns

sync_all

which is the name of the parent graph. these are all subgraphs

Hello! I'm curious what would be an "idiomatic" way to generate test data with my pipeline, besides the production run? So, basically I would like to run the pipeline on a subset of the source data in order to generate a test set. This test set would be re-generated on each production run, to make sure that we always have a small, up-to-date and complete set for developing the pipeline locally. Should I use a partition for this subset? Or define a separate job with a configuration for the subset? Or a multi-asset? I'm a bit lost here 🙂 Any suggestions?

Hi! I have another question...I don't have a very good understanding of loggers. I'm locally testing a job in a jupyter notebook, and right now it prints the logs into the notebook. How do I send those to a file? Thanks!

👋 Potential terrible question. I’m looking to deploy Dagster via Helm chart, and curious on the method and format of the user/local code that gets deployed alongside the application. Based on the docs, I update the Dagster template values to include my user deployment, which seems to insinuate that my dag code should be built as a Docker image separate from the application. Therefore, is the correct method to do this: 1. Define a new Dockerfile that simply adds the local DAG code to the image 2. Build, tag, and push to ECR 3. Reference that image/tag in the

dagster-user-deployments

config?

Hello all! I'm running Dagster on Kubernetes to train ML models using sometimes GPUs. I have a graph where some ops never require a GPU and some ops sometimes do. Is there a from the run config to configure (maybe using tags?) k8s resource requests and limits at the op level? The goal would be too use GPUs only on ops requiring them, when they're required at all.

hello, i'm trying a thing where i'm setting io manager configurations for each asset using

with_resources

, but when I try to materialize the asset from dagit i get an error that says

__ASSET_JOB cannot be executed with the provided config. Please fix the following errors: Missing required config entry "ops" at the root

, if i shift-click and have it scaffold the job, i can tell that it knows all the configs needed, but the ones I set during asset definition aren't being respected. Any ideas what's going on?

Hello! I've started using software-defined assets. For assets that need specific resources, I've figured out I can create a job out of them, and specify resources in the job. However, is there a way to specify "default resources" for when using the "Materialize" buttons in Dagit directly on the assets? Although I can use a job, the ability to directly materialize from the asset graph sound great, but it fails if you do not provide resource definitions. Thanks!

Hello. When trying to define a graph input as an

Optional[Dict[str, str]]

like this:

@graph
def my_graph(my_dict: Optional[Dict[str, str]]):
    pass

I'm getting the following error:

dagster/core/workspace/context.py:554: UserWarning: Error loading repository location repo.py:TypeError: Optional[t] requires a single type. Got <dagster.core.types.python_dict._TypedPythonDict object at 0x7fbb4a0662b0>.

Is there any way around this? Thank you.

Hey guys, had a quick question regarding the run_retries dagster instance option from https://docs.dagster.io/deployment/run-retries - I was wondering if there was a way to configure retry_strategy on an instance level rather than having to specify it on a per-job basis.

I was wondering what the difference between

HookContext

and

OpExecutionContext

is? It seems like there is some overlap there, but wanted to see what the experts say.

Are there any examples about how to mock patch a resource or an asset so fake data is returned? The docs give examples for testing that contain mock objects, but have not figured out how or where to set the mock patch return value.

Hey folks! I’m having troubles with the materialization of a SDA using an IOManager: I have a SDA that takes a very large table as input (bigger than my memory I mean) and I want to stream the output of my SDA to an other table in my database. I’m trying to use generators to handle streaming like this (simplified version) :

class PandasIOManager(IOManager):
    def __init__(self, con_string: str):
        self._con = con_string

    def handle_output(self, context, obj: Iterator[pd.DataFrame]):
        obj.to_sql(table, con=self._con, if_exists="append")

    def load_input(self, context) -> Iterator[pd.DataFrame]:
        """Load the contents of a table as a pandas DataFrame."""
        return pd.read_sql(f"SELECT * FROM {table}", con=self._con, chunksize=10)

@asset(
    ins={"my_model": AssetIn(input_manager_key="pandas_df_manager")},
    io_manager_key="pandas_df_manager",
)
def downstream_asset(upstream_asset):
    for chunk in upstream_asset:
        # do stuff
        yield pd.Dataframe(result)

I get

dagster._core.errors.DagsterInvariantViolationError: Compute function for op "downstream_asset" yielded a value of type <class 'pandas.core.frame.DataFrame'> rather than an instance of Output, AssetMaterialization, or ExpectationResult. Values yielded by ops must be wrapped in one of these types. If your op has a single output and yields no other events, you may want to use `return` instead of `yield` in the body of your op compute function. If you are already using `return`, and you expected to return a value of type <class 'pandas.core.frame.DataFrame'>, you may be inadvertently returning a generator rather than the value you expected.

an tried wrapping my output without success 🙃 I made some research across issues and messages from this slack but everyone is using

@op

and

DynamicOutput

which I can’t do since I’m using SDAs produces by the

dagster-dbt

integration 🤯 . I found some people saying that SDA were not meant to be dynamic (outputs must be known when building the graph or something...) but then I don’t know how to do! Maybe I should use a different dagster API to achieve what I’m trying to do? help me out!

I'm sure this has already been asked before but is there a way to store schedules in a database rather than the codebase? If I need to create several schedules - it can get pretty messy.

Hey all. Not sure if this is a bug on your end regarding the package, or Poetry, but I figured I would note in here that Poetry and PDM are having a particularly hard time handling dependency conflicts between dagster and dagster-postgres. Does this have to do with dagster-postgres 1.0.5 being yanked on PyPi? I have 0 experience with publishing packages, so not sure what can go wrong there. Here is terminal output for what used to work without a hitch when specifying package dependencies:

wh git:(master) ✗ poetry add dagster dagster-postgres
Using version ^1.0.10 for dagster
Using version ^1.0.5 for dagster-postgres

Updating dependencies
Resolving dependencies... (0.0s)

  SolverProblemError

  Because no versions of dagster-postgres match >1.0.5,<2.0.0
   and dagster-postgres (1.0.5) depends on dagster (1.0.5), dagster-postgres (>=1.0.5,<2.0.0) requires dagster (1.0.5).
  So, because wh depends on both dagster (^1.0.10) and dagster-postgres (^1.0.5), version solving failed.

UPDATE: Updating Poetry to the latest version fixes this. Feel free to delete if this is too irrelevant. 🙂

Hey everyone, having an issue with the dagster and dagit CLIs. I'm on Mac M1 and just ran this fresh install from the docs:

pipenv install dagster dagit requests

Upon trying to run any command with either the

dagster

or

dagit

CLIs, I get this error:

ImportError: dlopen(/Users/papi/.local/share/virtualenvs/dagster-oVuOtnKT/lib/python3.10/site-packages/google/protobuf/pyext/_message.cpython-310-darwin.so, 0x0002): symbol not found in flat namespace (__ZN6google8protobuf15FieldDescriptor12TypeOnceInitEPKS1_)

I saw in an earlier message a few months ago about an issue with the

grpcic

library on Mac M1s. I tried installing with the

--no-binary

flag but it didn't change anything. Would love some help here!

Hello, I am new to Dagster. I am following along with this tutorial and running into issues when attempting to materialize assets. I receive several errors, including STEP_FAILURE ("STEP_FAILURE - Execution of step "cereal_ratings_csv" failed") and RUN_FAILURE errors ("RUN_FAILURE - Execution of run for "__ASSET_JOB" failed. Steps failed: ['cereal_ratings_csv']"). I'm also seeing a FileNotFoundError ("[Errno 2] No such file or directory: 'cereal.ratings.csv.zip'"). My code is exactly as shown in the tutorial. Have attempted to troubleshoot, including providing full path name for location of zip file (which is being downloaded and placed into my working directory correctly) to no avail. No issues with previous tutorial steps.

Hey Ismael - the start argument to that function is actually a datetime object, not a string. You'll want to turn it into a string within that function (by calling str(start)) or start.strftime for a particular date format)

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This 30-min auto job run failure happens a lot