petabridge / akkadotnet-bootstrap Goto Github PK

I followed all steps given in readme file of akkadotnet-bootstrap but I am getting an error
Step 1/16 : FROM microsoft/dotnet:2.0-sdk AS build-env
---> 331b8f314522
Step 2/16 : WORKDIR /app
---> Using cache
---> 49f0b8ee57a5
Step 3/16 : ENV CLUSTER_SEEDS "[]"
---> Using cache
---> b647d400006b
Step 4/16 : ENV CLUSTER_IP ""
---> Using cache
---> d30a5852fe16
Step 5/16 : ENV CLUSTER_PORT "5011"
---> Using cache
---> 068d47bdb21d
Step 6/16 : COPY . ./
---> Using cache
---> 98ed09828702
Step 7/16 : RUN dotnet restore
---> Running in dca31f8ea870
C:\Program Files\dotnet\sdk\2.1.202\NuGet.targets(928,5): warning MSB3202: The project file "C:\AlertProcessorPortal\AlertProcessorPortal.csproj" was not found. [C:\app\MessageGateway.csproj]
C:\Program Files\dotnet\sdk\2.1.202\NuGet.targets(928,5): warning MSB3202: The project file "C:\DeviceManagerPortal\DeviceManagerPortal.csproj" was not found. [C:\app\MessageGateway.csproj]
C:\Program Files\dotnet\sdk\2.1.202\NuGet.targets(928,5): warning MSB3202: The project file "C:\ReportPortal\ReportProcessorPortal.csproj" was not found. [C:\app\MessageGateway.csproj]
C:\Program Files\dotnet\sdk\2.1.202\NuGet.targets(1019,5): warning MSB3202: The project file "C:\AlertProcessorPortal\AlertProcessorPortal.csproj" was not found. [C:\app\MessageGateway.csproj]
C:\Program Files\dotnet\sdk\2.1.202\NuGet.targets(1019,5): warning MSB3202: The project file "C:\DeviceManagerPortal\DeviceManagerPortal.csproj" was not found. [C:\app\MessageGateway.csproj]
C:\Program Files\dotnet\sdk\2.1.202\NuGet.targets(1019,5): warning MSB3202: The project file "C:\ReportPortal\ReportProcessorPortal.csproj" was not found. [C:\app\MessageGateway.csproj]
Restoring packages for C:\app\MessageGateway.csproj...
C:\Program Files\dotnet\sdk\2.1.202\NuGet.targets(114,5): error : Unable to load the service index for source https://api.nuget.org/v3/index.json. [C:\app\MessageGateway.csproj]
C:\Program Files\dotnet\sdk\2.1.202\NuGet.targets(114,5): error : An error occurred while sending the request. [C:\app\MessageGateway.csproj]
C:\Program Files\dotnet\sdk\2.1.202\NuGet.targets(114,5): error : The server name or address could not be resolved [C:\app\MessageGateway.csproj]
The command 'powershell -Command $ErrorActionPreference = 'Stop'; $ProgressPreference = 'SilentlyContinue'; dotnet restore' returned a non-zero code: 1

It fails on step-7. Do you have any solution to this problem?

In order to properly bootstrap a Docker container / PCF cell / etc, we really need to add support for the bind-port option to Akka.Net, which is in progress here: akkadotnet/akka.net#3358

It currently prints out the System.List type:

[Docker-Bootstrap] SEEDS=System.Collections.Generic.List1[System.String]`

Should probably be something like SEEDS=["akka:tcp//host:5055", "akka:tcp//host:5055"]

When calling BootstrapFromDocker setting the assignDefaultHostName parameter has no effect, the code always sets the hostname using Dns.GetHostName()

Is this production ready or is just for testing. Your approach doesn't actually need to perform a DNS resolution on startup. Ans special reason why?

See https://github.com/Aaronontheweb/Akka.Cluster.SBRDemo for full reproduction and demo

Affects version 0.5.1 and previous

Cluster formation will be broken, randomly as a result of environment variable randomization, if we quote CLUSTER_SEEDS:

apiVersion: v1
kind: Namespace
metadata:
  name: lighthouse-sbr2
---
apiVersion: v1
kind: Service
metadata:
  name: lighthouse
  namespace: lighthouse-sbr2
  labels:
    app: lighthouse
spec:
  clusterIP: None
  ports:
  - port: 4053
  selector:
    app: lighthouse
---
apiVersion: apps/v1
kind: StatefulSet
metadata:
  namespace: lighthouse-sbr2
  name: lighthouse
  labels:
    app: lighthouse
spec:
  serviceName: lighthouse
  replicas: 2
  selector:
    matchLabels:
      app: lighthouse
  template:
    metadata:
      labels:
        app: lighthouse
    spec:
      terminationGracePeriodSeconds: 35
      containers:
      - name: lighthouse
        image: arkatufus/lighthouse:1.5.2
        lifecycle:
          preStop:
            exec:
              command: ["/bin/sh", "-c", "pbm 127.0.0.1:9110 cluster leave"]
        env:
        - name: ACTORSYSTEM
          value: AkkaTrader
        - name: POD_NAME
          valueFrom:
            fieldRef:
              fieldPath: metadata.name
        - name: CLUSTER_IP
          value: "$(POD_NAME).lighthouse"
        - name: CLUSTER_SEEDS
          value: "akka.tcp://$(ACTORSYSTEM)@lighthouse-0.lighthouse:4053,akka.tcp://$(ACTORSYSTEM)@lighthouse-1.lighthouse:4053,akka.tcp://$(ACTORSYSTEM)@lighthouse-2.lighthouse:4053"
        - name: AKKA__CLUSTER__DOWNING_PROVIDER_CLASS
          value: "Akka.Cluster.SBR.SplitBrainResolverProvider, Akka.Cluster"
        - name: AKKA__CLUSTER__SPLIT_BRAIN_RESOLVER__ACTIVE_STRATEGY
          value: "keep-majority"
        livenessProbe:
          tcpSocket:
            port: 4053
        ports:
        - containerPort: 4053
          protocol: TCP

If I unquote CLUSTER_SEEDS then cluster formation works fine:

apiVersion: v1
kind: Namespace
metadata:
  name: lighthouse-sbr2
---
apiVersion: v1
kind: Service
metadata:
  name: lighthouse
  namespace: lighthouse-sbr2
  labels:
    app: lighthouse
spec:
  clusterIP: None
  ports:
  - port: 4053
  selector:
    app: lighthouse
---
apiVersion: apps/v1
kind: StatefulSet
metadata:
  namespace: lighthouse-sbr2
  name: lighthouse
  labels:
    app: lighthouse
spec:
  serviceName: lighthouse
  replicas: 2
  selector:
    matchLabels:
      app: lighthouse
  template:
    metadata:
      labels:
        app: lighthouse
    spec:
      terminationGracePeriodSeconds: 35
      containers:
      - name: lighthouse
        image: arkatufus/lighthouse:1.5.2
        lifecycle:
          preStop:
            exec:
              command: ["/bin/sh", "-c", "pbm 127.0.0.1:9110 cluster leave"]
        env:
        - name: ACTORSYSTEM
          value: AkkaTrader
        - name: POD_NAME
          valueFrom:
            fieldRef:
              fieldPath: metadata.name
        - name: CLUSTER_IP
          value: "$(POD_NAME).lighthouse"
        - name: CLUSTER_SEEDS
          value: akka.tcp://$(ACTORSYSTEM)@lighthouse-0.lighthouse:4053,akka.tcp://$(ACTORSYSTEM)@lighthouse-1.lighthouse:4053,akka.tcp://$(ACTORSYSTEM)@lighthouse-2.lighthouse:4053
        - name: AKKA__CLUSTER__DOWNING_PROVIDER_CLASS
          value: "Akka.Cluster.SBR.SplitBrainResolverProvider, Akka.Cluster"
        - name: AKKA__CLUSTER__SPLIT_BRAIN_RESOLVER__ACTIVE_STRATEGY
          value: "keep-majority"
        livenessProbe:
          tcpSocket:
            port: 4053
        ports:
        - containerPort: 4053
          protocol: TCP

If we're not running in PCF, the environment variables we need will not be populated. We should signal that via bool on PcfEnvironment to avoid blow-ups when people want to run their app locally even though it's destined for PCF.

#60 - need to add these changes to the README file.

cc @nagytech

k8s support for contact-point-discovery would be great.
Scaling out would be much easier.

Thanks and best regards
Thomas

The cluster IP is not being set correctly. Having looked at both the .cs and DockerFile get-dockerip.sh is never actually executed.

The text in the guidance for using Akka.NET in docker is not great. It has broken links, unfinished sentences and an example that is not very good.

Unfinished sentence: The Dockerfile and get-dockerip.sh

In the latter part you say:
That will create a new docker image you can use. Suppose we called our image foo.
Once our image is created, we can start it via docker run:
PS> docker run -p 5044:5011 -e CLUSTER_SEEDS='akka.tcp://[email protected]:4053' --name dread1 dread.collector

Why do you mention that the name is foo if you do not use it in the docker run command?

Instead, please provide an end-to-end example where you create a running simple demo app, possibly with a command line app that talks to an actor in the container.