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faas | OpenFaaS - Serverless Functions | Function As A Service library

 by   openfaas Go Version: 0.21.3 License: MIT

 by   openfaas Go Version: 0.21.3 License: MIT

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kandi X-RAY | faas Summary

faas is a Go library typically used in Serverless, Function As A Service, Docker, Prometheus applications. faas has no bugs, it has no vulnerabilities, it has a Permissive License and it has medium support. You can download it from GitHub.
Conceptual architecture and stack, more detail available in the docs.
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kandi-support Support

  • faas has a medium active ecosystem.
  • It has 20981 star(s) with 1712 fork(s). There are 496 watchers for this library.
  • There were 2 major release(s) in the last 12 months.
  • There are 25 open issues and 734 have been closed. On average issues are closed in 23 days. There are 4 open pull requests and 0 closed requests.
  • It has a neutral sentiment in the developer community.
  • The latest version of faas is 0.21.3
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quality kandi Quality

  • faas has 0 bugs and 0 code smells.
faas Quality
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securitySecurity

  • faas has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.
  • faas code analysis shows 0 unresolved vulnerabilities.
  • There are 0 security hotspots that need review.
faas Security
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license License

  • faas is licensed under the MIT License. This license is Permissive.
  • Permissive licenses have the least restrictions, and you can use them in most projects.
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  • faas releases are available to install and integrate.
  • Installation instructions, examples and code snippets are available.
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faas Key Features

OpenFaaS - Serverless Functions Made Simple

Code samples

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"use strict"

module.exports = async (event, context) => {
    return context
        .status(200)
        .headers({"Content-Type": "text/html"})
        .succeed(`
        <h1>
            👋 Hello World 🌍
        </h1>`);
}

Enable use of images from the local library on Kubernetes

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containers:
  - name: test-container
    image: testImage:latest
    imagePullPolicy: Never
# Start minikube and set docker env
minikube start
eval $(minikube docker-env)

# Build image
docker build -t foo:1.0 .

# Run in minikube
kubectl run hello-foo --image=foo:1.0 --image-pull-policy=Never
    image: wm/hello-openfaas2:0.1
    imagePullPolicy: Always

Running eleventy build (via npm run) as AWS Lambda function

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const Eleventy = require('@11ty/eleventy');

const elev = new Eleventy('./input', './output');

elev.init();
elev.write();

console.log('done');

Nomad and consul setup

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a93c5cb46a3e   image-name bash   2 hours ago    Up 2 hours  10.0.47.2:21435->8000/tcp, 10.0.47.2:21435->8000/udp foo-bar

SAS Viya 3.4 Manipulation of a table in memory

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data causer.mytable;
    set caslib.mytable;
    where date < '06FEB2021'd;
run;

proc casutil;
    droptable casdata="mytable" incaslib="caslib" outcaslib="caslib";
    promote casdata="mytable" incaslib="casuser" outcaslib="caslib";
run;

How to reuse AWS Lambda functions?

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exports.handler = function(event, context) {
    const dbname = event.stageVariables.dbname
    var conn = "postgres://username:password@url.region.amazonaws.com:port/" + dbname;
    var client = new pg.Client(conn);
}

Serializing object with list of object arrays throws NullReferenceException using Json.NET

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List<FooData[]> foo = new List<FooData[]>()
{
    new FooData[]
    {
        new FooData() { FooString1 = "foo string 1" , FooString2 = "foo string 2", FooString3 = "foo string 3" },
        new FooData() {FooString1 = "foo string 4" , FooString2 = "foo string 5", FooString3 = "foo string 6" }
    },
    new FooData[]
    {
        new FooData() { FooString1 = "foo string 1" , FooString2 = "foo string 2", FooString3 = "foo string 3" },
        new FooData() {FooString1 = "foo string 4" , FooString2 = "foo string 5", FooString3 = "foo string 6" }
    }
};

List<FaaData[]> faa = new List<FaaData[]>()
{
    new FaaData[]
    {
        new FaaData() { FaaString1 = "faa string 1" , FaaString2 = "faa string 2", FaaString3 = "faa string 3" },
        new FaaData() {FaaString1 = "faa string 4" , FaaString2 = "faa string 5", FaaString3 = "faa string 6" }
    },
    new FaaData[]
    {
        new FaaData() { FaaString1 = "faa string 1" , FaaString2 = "faa string 2", FaaString3 = "faa string 3" },
        new FaaData() {FaaString1 = "faa string 4" , FaaString2 = "faa string 5", FaaString3 = "faa string 6" }
    }
};

var JsonThis = new 
{
    Foo = foo.ToArray(),
    Faa = faa.ToArray()
};

string JsonString = JsonConvert.SerializeObject(JsonThis, Formatting.Indented,
                    new JsonSerializerSettings { PreserveReferencesHandling = PreserveReferencesHandling.Objects });

var result = JsonConvert.DeserializeObject<MyJsonObject>(JsonString);
public class MyJsonObject
{
    public FooData[][] Foo { get; set; }
    public FaaData[][] Faa { get; set; }
}

public class FooData
{
    public string FooString1 { get; set; }
    public string FooString2 { get; set; }
    public string FooString3 { get; set; }
}

public class FaaData
{
    public string FaaString1 { get; set; }
    public string FaaString2 { get; set; }
    public string FaaString3 { get; set; }
}
List<FooData[]> foo = new List<FooData[]>()
{
    new FooData[]
    {
        new FooData() { FooString1 = "foo string 1" , FooString2 = "foo string 2", FooString3 = "foo string 3" },
        new FooData() {FooString1 = "foo string 4" , FooString2 = "foo string 5", FooString3 = "foo string 6" }
    },
    new FooData[]
    {
        new FooData() { FooString1 = "foo string 1" , FooString2 = "foo string 2", FooString3 = "foo string 3" },
        new FooData() {FooString1 = "foo string 4" , FooString2 = "foo string 5", FooString3 = "foo string 6" }
    }
};

List<FaaData[]> faa = new List<FaaData[]>()
{
    new FaaData[]
    {
        new FaaData() { FaaString1 = "faa string 1" , FaaString2 = "faa string 2", FaaString3 = "faa string 3" },
        new FaaData() {FaaString1 = "faa string 4" , FaaString2 = "faa string 5", FaaString3 = "faa string 6" }
    },
    new FaaData[]
    {
        new FaaData() { FaaString1 = "faa string 1" , FaaString2 = "faa string 2", FaaString3 = "faa string 3" },
        new FaaData() {FaaString1 = "faa string 4" , FaaString2 = "faa string 5", FaaString3 = "faa string 6" }
    }
};

var JsonThis = new 
{
    Foo = foo.ToArray(),
    Faa = faa.ToArray()
};

string JsonString = JsonConvert.SerializeObject(JsonThis, Formatting.Indented,
                    new JsonSerializerSettings { PreserveReferencesHandling = PreserveReferencesHandling.Objects });

var result = JsonConvert.DeserializeObject<MyJsonObject>(JsonString);
public class MyJsonObject
{
    public FooData[][] Foo { get; set; }
    public FaaData[][] Faa { get; set; }
}

public class FooData
{
    public string FooString1 { get; set; }
    public string FooString2 { get; set; }
    public string FooString3 { get; set; }
}

public class FaaData
{
    public string FaaString1 { get; set; }
    public string FaaString2 { get; set; }
    public string FaaString3 { get; set; }
}

Creating a Node.js REST API using Firebase Cloud Functions, without Express?

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exports.date = functions.https.onRequest((req, res) => {
  // ...
});

Community Discussions

Trending Discussions on faas
  • Enable use of images from the local library on Kubernetes
  • Running eleventy build (via npm run) as AWS Lambda function
  • Nomad and consul setup
  • SAS Viya 3.4 Manipulation of a table in memory
  • What is the difference between WCF and Azure Function?
  • openfaas deployment.kubernetes.io/max-replicas vs com.openfaas.scale.max
  • How to reuse AWS Lambda functions?
  • Start container instance on web request to FQDN
  • Serializing object with list of object arrays throws NullReferenceException using Json.NET
  • Is a WSGI container relevant on AWS Lambda?
Trending Discussions on faas

QUESTION

Enable use of images from the local library on Kubernetes

Asked 2022-Mar-20 at 13:23

I'm following a tutorial https://docs.openfaas.com/tutorials/first-python-function/,

currently, I have the right image

$ docker images | grep hello-openfaas
wm/hello-openfaas                                     latest                          bd08d01ce09b   34 minutes ago      65.2MB
$ faas-cli deploy -f ./hello-openfaas.yml 
Deploying: hello-openfaas.
WARNING! You are not using an encrypted connection to the gateway, consider using HTTPS.

Deployed. 202 Accepted.
URL: http://IP:8099/function/hello-openfaas

there is a step that forewarns me to do some setup(My case is I'm using Kubernetes and minikube and don't want to push to a remote container registry, I should enable the use of images from the local library on Kubernetes.), I see the hints

see the helm chart for how to set the ImagePullPolicy

I'm not sure how to configure it correctly. the final result indicates I failed.

Unsurprisingly, I couldn't access the function service, I find some clues in https://docs.openfaas.com/deployment/troubleshooting/#openfaas-didnt-start which might help to diagnose the problem.

$ kubectl logs -n openfaas-fn deploy/hello-openfaas
Error from server (BadRequest): container "hello-openfaas" in pod "hello-openfaas-558f99477f-wd697" is waiting to start: trying and failing to pull image

$ kubectl describe -n openfaas-fn deploy/hello-openfaas
Name:                   hello-openfaas
Namespace:              openfaas-fn
CreationTimestamp:      Wed, 16 Mar 2022 14:59:49 +0800
Labels:                 faas_function=hello-openfaas
Annotations:            deployment.kubernetes.io/revision: 1
                        prometheus.io.scrape: false
Selector:               faas_function=hello-openfaas
Replicas:               1 desired | 1 updated | 1 total | 0 available | 1 unavailable
StrategyType:           RollingUpdate
MinReadySeconds:        0
RollingUpdateStrategy:  0 max unavailable, 1 max surge
Pod Template:
  Labels:       faas_function=hello-openfaas
  Annotations:  prometheus.io.scrape: false
  Containers:
   hello-openfaas:
    Image:      wm/hello-openfaas:latest
    Port:       8080/TCP
    Host Port:  0/TCP
    Liveness:   http-get http://:8080/_/health delay=2s timeout=1s period=2s #success=1 #failure=3
    Readiness:  http-get http://:8080/_/health delay=2s timeout=1s period=2s #success=1 #failure=3
    Environment:
      fprocess:  python3 index.py
    Mounts:      <none>
  Volumes:       <none>
Conditions:
  Type           Status  Reason
  ----           ------  ------
  Available      False   MinimumReplicasUnavailable
  Progressing    False   ProgressDeadlineExceeded
OldReplicaSets:  <none>
NewReplicaSet:   hello-openfaas-558f99477f (1/1 replicas created)
Events:
  Type    Reason             Age   From                   Message
  ----    ------             ----  ----                   -------
  Normal  ScalingReplicaSet  29m   deployment-controller  Scaled up replica set hello-openfaas-558f99477f to 1

hello-openfaas.yml

version: 1.0
provider:
  name: openfaas
  gateway: http://IP:8099
functions:
  hello-openfaas:
    lang: python3
    handler: ./hello-openfaas
    image: wm/hello-openfaas:latest
    imagePullPolicy: Never

I create a new project hello-openfaas2 to reproduce this error

$ faas-cli new --lang python3 hello-openfaas2 --prefix="wm"
Folder: hello-openfaas2 created.
# I add `imagePullPolicy: Never` to `hello-openfaas2.yml`
$ faas-cli build -f ./hello-openfaas2.yml 
$ faas-cli deploy -f ./hello-openfaas2.yml 
Deploying: hello-openfaas2.
WARNING! You are not using an encrypted connection to the gateway, consider using HTTPS.

Deployed. 202 Accepted.
URL: http://192.168.1.3:8099/function/hello-openfaas2


$ kubectl logs -n openfaas-fn deploy/hello-openfaas2
Error from server (BadRequest): container "hello-openfaas2" in pod "hello-openfaas2-7c67488865-7d7vm" is waiting to start: image can't be pulled

$ kubectl get pods --all-namespaces
NAMESPACE              NAME                                        READY   STATUS             RESTARTS         AGE
kube-system            coredns-64897985d-kp7vf                     1/1     Running            0                47h
...
openfaas-fn            env-6c79f7b946-bzbtm                        1/1     Running            0                4h28m
openfaas-fn            figlet-54db496f88-957xl                     1/1     Running            0                18h
openfaas-fn            hello-openfaas-547857b9d6-z277c             0/1     ImagePullBackOff   0                127m
openfaas-fn            hello-openfaas-7b6946b4f9-hcvq4             0/1     ImagePullBackOff   0                165m
openfaas-fn            hello-openfaas2-7c67488865-qmrkl            0/1     ImagePullBackOff   0                13m
openfaas-fn            hello-openfaas3-65847b8b67-b94kd            0/1     ImagePullBackOff   0                97m
openfaas-fn            hello-python-554b464498-zxcdv               0/1     ErrImagePull       0                3h23m
openfaas-fn            hello-python-8698bc68bd-62gh9               0/1     ImagePullBackOff   0                3h25m

from https://docs.openfaas.com/reference/yaml/, I know I put the imagePullPolicy in the wrong place, there is no such keyword in its schema.

I also tried eval $(minikube docker-env and still get the same error.


I've a feeling that faas-cli deploy can be replace by helm, they all mean to run the image(whether from remote or local) in Kubernetes cluster, then I can use helm chart to setup the pullPolicy there. Even though the detail is not still clear to me, This discovery inspires me.


So far, after eval $(minikube docker-env)

$ docker images
REPOSITORY                                TAG        IMAGE ID       CREATED             SIZE
wm/hello-openfaas2                        0.1        03c21bd96d5e   About an hour ago   65.2MB
python                                    3-alpine   69fba17b9bae   12 days ago         48.6MB
ghcr.io/openfaas/figlet                   latest     ca5eef0de441   2 weeks ago         14.8MB
ghcr.io/openfaas/alpine                   latest     35f3d4be6bb8   2 weeks ago         14.2MB
ghcr.io/openfaas/faas-netes               0.14.2     524b510505ec   3 weeks ago         77.3MB
k8s.gcr.io/kube-apiserver                 v1.23.3    f40be0088a83   7 weeks ago         135MB
k8s.gcr.io/kube-controller-manager        v1.23.3    b07520cd7ab7   7 weeks ago         125MB
k8s.gcr.io/kube-scheduler                 v1.23.3    99a3486be4f2   7 weeks ago         53.5MB
k8s.gcr.io/kube-proxy                     v1.23.3    9b7cc9982109   7 weeks ago         112MB
ghcr.io/openfaas/gateway                  0.21.3     ab4851262cd1   7 weeks ago         30.6MB
ghcr.io/openfaas/basic-auth               0.21.3     16e7168a17a3   7 weeks ago         14.3MB
k8s.gcr.io/etcd                           3.5.1-0    25f8c7f3da61   4 months ago        293MB
ghcr.io/openfaas/classic-watchdog         0.2.0      6f97aa96da81   4 months ago        8.18MB
k8s.gcr.io/coredns/coredns                v1.8.6     a4ca41631cc7   5 months ago        46.8MB
k8s.gcr.io/pause                          3.6        6270bb605e12   6 months ago        683kB
ghcr.io/openfaas/queue-worker             0.12.2     56e7216201bc   7 months ago        7.97MB
kubernetesui/dashboard                    v2.3.1     e1482a24335a   9 months ago        220MB
kubernetesui/metrics-scraper              v1.0.7     7801cfc6d5c0   9 months ago        34.4MB
nats-streaming                            0.22.0     12f2d32e0c9a   9 months ago        19.8MB
gcr.io/k8s-minikube/storage-provisioner   v5         6e38f40d628d   11 months ago       31.5MB
functions/markdown-render                 latest     93b5da182216   2 years ago         24.6MB
functions/hubstats                        latest     01affa91e9e4   2 years ago         29.3MB
functions/nodeinfo                        latest     2fe8a87bf79c   2 years ago         71.4MB
functions/alpine                          latest     46c6f6d74471   2 years ago         21.5MB
prom/prometheus                           v2.11.0    b97ed892eb23   2 years ago         126MB
prom/alertmanager                         v0.18.0    ce3c87f17369   2 years ago         51.9MB
alexellis2/openfaas-colorization          0.4.1      d36b67b1b5c1   2 years ago         1.84GB
rorpage/text-to-speech                    latest     5dc20810eb54   2 years ago         86.9MB
stefanprodan/faas-grafana                 4.6.3      2a4bd9caea50   4 years ago         284MB

$ kubectl get pods --all-namespaces
NAMESPACE              NAME                                        READY   STATUS             RESTARTS        AGE
kube-system            coredns-64897985d-kp7vf                     1/1     Running            0               6d
kube-system            etcd-minikube                               1/1     Running            0               6d
kube-system            kube-apiserver-minikube                     1/1     Running            0               6d
kube-system            kube-controller-manager-minikube            1/1     Running            0               6d
kube-system            kube-proxy-5m8lr                            1/1     Running            0               6d
kube-system            kube-scheduler-minikube                     1/1     Running            0               6d
kube-system            storage-provisioner                         1/1     Running            1 (6d ago)      6d
kubernetes-dashboard   dashboard-metrics-scraper-58549894f-97tsv   1/1     Running            0               5d7h
kubernetes-dashboard   kubernetes-dashboard-ccd587f44-lkwcx        1/1     Running            0               5d7h
openfaas-fn            base64-6bdbcdb64c-djz8f                     1/1     Running            0               5d1h
openfaas-fn            colorise-85c74c686b-2fz66                   1/1     Running            0               4d5h
openfaas-fn            echoit-5d7df6684c-k6ljn                     1/1     Running            0               5d1h
openfaas-fn            env-6c79f7b946-bzbtm                        1/1     Running            0               4d5h
openfaas-fn            figlet-54db496f88-957xl                     1/1     Running            0               4d19h
openfaas-fn            hello-openfaas-547857b9d6-z277c             0/1     ImagePullBackOff   0               4d3h
openfaas-fn            hello-openfaas-7b6946b4f9-hcvq4             0/1     ImagePullBackOff   0               4d3h
openfaas-fn            hello-openfaas2-5c6f6cb5d9-24hkz            0/1     ImagePullBackOff   0               9m22s
openfaas-fn            hello-openfaas2-8957bb47b-7cgjg             0/1     ImagePullBackOff   0               2d22h
openfaas-fn            hello-openfaas3-65847b8b67-b94kd            0/1     ImagePullBackOff   0               4d2h
openfaas-fn            hello-python-6d6976845f-cwsln               0/1     ImagePullBackOff   0               3d19h
openfaas-fn            hello-python-b577cb8dc-64wf5                0/1     ImagePullBackOff   0               3d9h
openfaas-fn            hubstats-b6cd4dccc-z8tvl                    1/1     Running            0               5d1h
openfaas-fn            markdown-68f69f47c8-w5m47                   1/1     Running            0               5d1h
openfaas-fn            nodeinfo-d48cbbfcc-hfj79                    1/1     Running            0               5d1h
openfaas-fn            openfaas2-fun                               1/1     Running            0               15s
openfaas-fn            text-to-speech-74ffcdfd7-997t4              0/1     CrashLoopBackOff   2235 (3s ago)   4d5h
openfaas-fn            wordcount-6489865566-cvfzr                  1/1     Running            0               5d1h
openfaas               alertmanager-88449c789-fq2rg                1/1     Running            0               3d1h
openfaas               basic-auth-plugin-75fd7d69c5-zw4jh          1/1     Running            0               3d2h
openfaas               gateway-5c4bb7c5d7-n8h27                    2/2     Running            0               3d2h
openfaas               grafana                                     1/1     Running            0               4d8h
openfaas               nats-647b476664-hkr7p                       1/1     Running            0               3d2h
openfaas               prometheus-687648749f-tl8jp                 1/1     Running            0               3d1h
openfaas               queue-worker-7777ffd7f6-htx6t               1/1     Running            0               3d2h


$ kubectl get -o yaml -n openfaas-fn deploy/hello-openfaas2
apiVersion: apps/v1
kind: Deployment
metadata:
  annotations:
    deployment.kubernetes.io/revision: "6"
    prometheus.io.scrape: "false"
  creationTimestamp: "2022-03-17T12:47:35Z"
  generation: 6
  labels:
    faas_function: hello-openfaas2
  name: hello-openfaas2
  namespace: openfaas-fn
  resourceVersion: "400833"
  uid: 9c4e9d26-23af-4f93-8538-4e2d96f0d7e0
spec:
  progressDeadlineSeconds: 600
  replicas: 1
  revisionHistoryLimit: 10
  selector:
    matchLabels:
      faas_function: hello-openfaas2
  strategy:
    rollingUpdate:
      maxSurge: 1
      maxUnavailable: 0
    type: RollingUpdate
  template:
    metadata:
      annotations:
        prometheus.io.scrape: "false"
      creationTimestamp: null
      labels:
        faas_function: hello-openfaas2
        uid: "969512830"
      name: hello-openfaas2
    spec:
      containers:
      - env:
        - name: fprocess
          value: python3 index.py
        image: wm/hello-openfaas2:0.1
        imagePullPolicy: Always
        livenessProbe:
          failureThreshold: 3
          httpGet:
            path: /_/health
            port: 8080
            scheme: HTTP
          initialDelaySeconds: 2
          periodSeconds: 2
          successThreshold: 1
          timeoutSeconds: 1
        name: hello-openfaas2
        ports:
        - containerPort: 8080
          name: http
          protocol: TCP
        readinessProbe:
          failureThreshold: 3
          httpGet:
            path: /_/health
            port: 8080
            scheme: HTTP
          initialDelaySeconds: 2
          periodSeconds: 2
          successThreshold: 1
          timeoutSeconds: 1
        resources: {}
        securityContext:
          allowPrivilegeEscalation: false
          readOnlyRootFilesystem: false
        terminationMessagePath: /dev/termination-log
        terminationMessagePolicy: File
      dnsPolicy: ClusterFirst
      enableServiceLinks: false
      restartPolicy: Always
      schedulerName: default-scheduler
      securityContext: {}
      terminationGracePeriodSeconds: 30
status:
  conditions:
  - lastTransitionTime: "2022-03-17T12:47:35Z"
    lastUpdateTime: "2022-03-17T12:47:35Z"
    message: Deployment does not have minimum availability.
    reason: MinimumReplicasUnavailable
    status: "False"
    type: Available
  - lastTransitionTime: "2022-03-20T12:16:56Z"
    lastUpdateTime: "2022-03-20T12:16:56Z"
    message: ReplicaSet "hello-openfaas2-5d6c7c7fb4" has timed out progressing.
    reason: ProgressDeadlineExceeded
    status: "False"
    type: Progressing
  observedGeneration: 6
  replicas: 2
  unavailableReplicas: 2
  updatedReplicas: 1

In one shell,

docker@minikube:~$ docker run  --name wm -ti wm/hello-openfaas2:0.1
2022/03/20 13:04:52 Version: 0.2.0  SHA: 56bf6aac54deb3863a690f5fc03a2a38e7d9e6ef
2022/03/20 13:04:52 Timeouts: read: 5s write: 5s hard: 0s health: 5s.
2022/03/20 13:04:52 Listening on port: 8080
...

and another shell

docker@minikube:~$ docker ps | grep wm
d7796286641c   wm/hello-openfaas2:0.1             "fwatchdog"              3 minutes ago       Up 3 minutes (healthy)   8080/tcp   wm

ANSWER

Answered 2022-Mar-16 at 08:10

If your image has a latest tag, the Pod's ImagePullPolicy will be automatically set to Always. Each time the pod is created, Kubernetes tries to pull the newest image.

Try not tagging the image as latest or manually setting the Pod's ImagePullPolicy to Never. If you're using static manifest to create a Pod, the setting will be like the following:

containers:
  - name: test-container
    image: testImage:latest
    imagePullPolicy: Never

Source https://stackoverflow.com/questions/71493306

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Here is a screenshot of the API gateway portal - designed for ease of use with the inception function. Deploy OpenFaaS to Kubernetes, OpenShift, or faasd deployment guides.

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