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kubernetes | Production-Grade Container Scheduling and Management | Continuous Deployment library

 by   kubernetes Go Version: v1.24.0-rc.0 License: Apache-2.0

 by   kubernetes Go Version: v1.24.0-rc.0 License: Apache-2.0

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kandi X-RAY | kubernetes Summary

kubernetes is a Go library typically used in Devops, Continuous Deployment, Docker applications. kubernetes has no bugs, it has no vulnerabilities, it has a Permissive License and it has medium support. You can download it from GitHub, GitLab.
Kubernetes, also known as K8s, is an open source system for managing containerized applications across multiple hosts. It provides basic mechanisms for deployment, maintenance, and scaling of applications. Kubernetes builds upon a decade and a half of experience at Google running production workloads at scale using a system called Borg, combined with best-of-breed ideas and practices from the community. Kubernetes is hosted by the Cloud Native Computing Foundation (CNCF). If your company wants to help shape the evolution of technologies that are container-packaged, dynamically scheduled, and microservices-oriented, consider joining the CNCF. For details about who's involved and how Kubernetes plays a role, read the CNCF announcement.
Support
Support
Quality
Quality
Security
Security
License
License
Reuse
Reuse

kandi-support Support

  • kubernetes has a medium active ecosystem.
  • It has 87661 star(s) with 32157 fork(s). There are 3259 watchers for this library.
  • There were 10 major release(s) in the last 12 months.
  • There are 1631 open issues and 39065 have been closed. On average issues are closed in 258 days. There are 670 open pull requests and 0 closed requests.
  • It has a neutral sentiment in the developer community.
  • The latest version of kubernetes is v1.24.0-rc.0
kubernetes Support
Best in #Continuous Deployment
Average in #Continuous Deployment
kubernetes Support
Best in #Continuous Deployment
Average in #Continuous Deployment

quality kandi Quality

  • kubernetes has 0 bugs and 0 code smells.
kubernetes Quality
Best in #Continuous Deployment
Average in #Continuous Deployment
kubernetes Quality
Best in #Continuous Deployment
Average in #Continuous Deployment

securitySecurity

  • kubernetes has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.
  • kubernetes code analysis shows 0 unresolved vulnerabilities.
  • There are 0 security hotspots that need review.
kubernetes Security
Best in #Continuous Deployment
Average in #Continuous Deployment
kubernetes Security
Best in #Continuous Deployment
Average in #Continuous Deployment

license License

  • kubernetes is licensed under the Apache-2.0 License. This license is Permissive.
  • Permissive licenses have the least restrictions, and you can use them in most projects.
kubernetes License
Best in #Continuous Deployment
Average in #Continuous Deployment
kubernetes License
Best in #Continuous Deployment
Average in #Continuous Deployment

buildReuse

  • kubernetes releases are available to install and integrate.
  • Installation instructions are not available. Examples and code snippets are available.
  • It has 1909213 lines of code, 86980 functions and 9795 files.
  • It has high code complexity. Code complexity directly impacts maintainability of the code.
kubernetes Reuse
Best in #Continuous Deployment
Average in #Continuous Deployment
kubernetes Reuse
Best in #Continuous Deployment
Average in #Continuous Deployment
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kubernetes Key Features

Production-Grade Container Scheduling and Management

To start developing K8s

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mkdir -p $GOPATH/src/k8s.io
cd $GOPATH/src/k8s.io
git clone https://github.com/kubernetes/kubernetes
cd kubernetes
make

Microk8s dashboard using nginx-ingress via http not working (Error: `no matches for kind "Ingress" in version "extensions/v1beta1"`)

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error: unable to recognize "ingress.yaml": no matches for kind "Ingress" in version "extensions/v1beta1"
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: minimal-ingress
  annotations:
    nginx.ingress.kubernetes.io/rewrite-target: /
spec:
  rules:
  - http:
      paths:
      - path: /testpath
        pathType: Prefix
        backend:
          service:
            name: test
            port:
              number: 80
error: unable to recognize "ingress.yaml": no matches for kind "Ingress" in version "extensions/v1beta1"
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: minimal-ingress
  annotations:
    nginx.ingress.kubernetes.io/rewrite-target: /
spec:
  rules:
  - http:
      paths:
      - path: /testpath
        pathType: Prefix
        backend:
          service:
            name: test
            port:
              number: 80
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  annotations:
    nginx.ingress.kubernetes.io/rewrite-target: /$2
    nginx.ingress.kubernetes.io/configuration-snippet: |
      rewrite ^(/dashboard)$ $1/ redirect;
    nginx.ingress.kubernetes.io/backend-protocol: "HTTPS"
    kubernetes.io/ingress.class: public
  name: dashboard
  namespace: kube-system
spec:
  rules:
  - http:
      paths:
      - path: /dashboard(/|$)(.*)
        pathType: Prefix
        backend:
          service:
            name: kubernetes-dashboard
            port:
              number: 443

PRECONDITION_FAILED: Delivery Acknowledge Timeout on Celery & RabbitMQ with Gevent and concurrency

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rabbitmq.conf: |
  consumer_timeout = 31622400000

Github Actions Failing

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steps:
 - id: gcloud
-  uses: GoogleCloudPlatform/github-actions/setup-gcloud@master
+  uses: google-github-actions/setup-gcloud@master
name: Build and Deploy

on:
  push:
    branches: [dev]

permissions:
  id-token: write
  contents: read

jobs:
  build-and-publish:
    steps:

    - name: Checkout
      uses: actions/checkout@v2

    - name: test local call from steps # this do not work
      if: github.ref_name == 'dev'       
      uses: ./.github/workflows/deploy.yml # this is from steps level
        with:
          devops-bucket: bucket-name
          role: iam role for the job

  dev: # this worked well
    if: github.ref_name == 'dev'
    uses: ./.github/workflows/deploy.yml # this is jobs level
    with:
      devops-bucket: bucket-name
      role: iam role for the job

Add Kubernetes scrape target to Prometheus instance that is NOT in Kubernetes

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- job_name: kubernetes
  kubernetes_sd_configs:
  - role: node
    api_server: https://kubernetes-cluster-api.com
    tls_config:
      insecure_skip_verify: true
      bearer_token: "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
  bearer_token: "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
  scheme: https
  tls_config:
    insecure_skip_verify: true
  relabel_configs:
  - separator: ;
    regex: __meta_kubernetes_node_label_(.+)
    replacement: $1
    action: labelmap
- job_name: 'kubelet-cadvisor'
  scheme: https

  kubernetes_sd_configs:
  - role: node
    api_server: https://api-server.example.com

    # TLS and auth settings to perform service discovery
    authorization:
      credentials_file: /kube/token  # the file with your service account token
    tls_config:
      ca_file: /kube/CA.crt  # the file with the CA certificate

  # The same as above but for actual scrape request.
  # We're going to send scrape requests back to the API-server
  # so the credentials are the same.
  bearer_token_file: /kube/token
  tls_config:
    ca_file: /kube/CA.crt

  relabel_configs:
  # This is just to drop this long __meta_kubernetes_node_label_ prefix
  - action: labelmap
    regex: __meta_kubernetes_node_label_(.+)

  # By default Prometheus goes to /metrics endpoint.
  # This relabeling changes it to /api/v1/nodes/[kubernetes_io_hostname]/proxy/metrics/cadvisor
  - source_labels: [kubernetes_io_hostname]
    replacement: /api/v1/nodes/$1/proxy/metrics/cadvisor
    target_label: __metrics_path__

  # This relabeling defines that Prometheus should connect to the
  # API-server instead of the actual instance. Together with the relabeling
  # from above this will make the scrape request proxied to the node kubelet.
  - replacement: api-server.example.com
    target_label: __address__
❯ kubectl config view --raw
apiVersion: v1
clusters:
- cluster:                      # you need this ⤋ long value 
    certificate-authority-data: LS0tLS1CRUdJTiBDRVJUSUZJ...
    server: https://api-server.example.com
  name: default
...
echo LS0tLS1CRUdJTiBDRVJUSUZJ... | base64 -d > CA.crt
- job_name: 'kubelet-cadvisor'
  scheme: https

  kubernetes_sd_configs:
  - role: node
    api_server: https://api-server.example.com

    # TLS and auth settings to perform service discovery
    authorization:
      credentials_file: /kube/token  # the file with your service account token
    tls_config:
      ca_file: /kube/CA.crt  # the file with the CA certificate

  # The same as above but for actual scrape request.
  # We're going to send scrape requests back to the API-server
  # so the credentials are the same.
  bearer_token_file: /kube/token
  tls_config:
    ca_file: /kube/CA.crt

  relabel_configs:
  # This is just to drop this long __meta_kubernetes_node_label_ prefix
  - action: labelmap
    regex: __meta_kubernetes_node_label_(.+)

  # By default Prometheus goes to /metrics endpoint.
  # This relabeling changes it to /api/v1/nodes/[kubernetes_io_hostname]/proxy/metrics/cadvisor
  - source_labels: [kubernetes_io_hostname]
    replacement: /api/v1/nodes/$1/proxy/metrics/cadvisor
    target_label: __metrics_path__

  # This relabeling defines that Prometheus should connect to the
  # API-server instead of the actual instance. Together with the relabeling
  # from above this will make the scrape request proxied to the node kubelet.
  - replacement: api-server.example.com
    target_label: __address__
❯ kubectl config view --raw
apiVersion: v1
clusters:
- cluster:                      # you need this ⤋ long value 
    certificate-authority-data: LS0tLS1CRUdJTiBDRVJUSUZJ...
    server: https://api-server.example.com
  name: default
...
echo LS0tLS1CRUdJTiBDRVJUSUZJ... | base64 -d > CA.crt
- job_name: 'kubelet-cadvisor'
  scheme: https

  kubernetes_sd_configs:
  - role: node
    api_server: https://api-server.example.com

    # TLS and auth settings to perform service discovery
    authorization:
      credentials_file: /kube/token  # the file with your service account token
    tls_config:
      ca_file: /kube/CA.crt  # the file with the CA certificate

  # The same as above but for actual scrape request.
  # We're going to send scrape requests back to the API-server
  # so the credentials are the same.
  bearer_token_file: /kube/token
  tls_config:
    ca_file: /kube/CA.crt

  relabel_configs:
  # This is just to drop this long __meta_kubernetes_node_label_ prefix
  - action: labelmap
    regex: __meta_kubernetes_node_label_(.+)

  # By default Prometheus goes to /metrics endpoint.
  # This relabeling changes it to /api/v1/nodes/[kubernetes_io_hostname]/proxy/metrics/cadvisor
  - source_labels: [kubernetes_io_hostname]
    replacement: /api/v1/nodes/$1/proxy/metrics/cadvisor
    target_label: __metrics_path__

  # This relabeling defines that Prometheus should connect to the
  # API-server instead of the actual instance. Together with the relabeling
  # from above this will make the scrape request proxied to the node kubelet.
  - replacement: api-server.example.com
    target_label: __address__
❯ kubectl config view --raw
apiVersion: v1
clusters:
- cluster:                      # you need this ⤋ long value 
    certificate-authority-data: LS0tLS1CRUdJTiBDRVJUSUZJ...
    server: https://api-server.example.com
  name: default
...
echo LS0tLS1CRUdJTiBDRVJUSUZJ... | base64 -d > CA.crt

Docker standard_init_linux.go:228: exec user process caused: no such file or directory

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FROM golang:1.17 as builder

# first (build) stage

WORKDIR /app
COPY . .
RUN go mod download
RUN CGO_ENABLED=0 go build -o k8s-for-beginners

# final (target) stage

FROM alpine:3.10
COPY --from=builder /app/k8s-for-beginners /
CMD ["/k8s-for-beginners"]
go mod init k8sapp     # creates a `go.mod`
module k8sapp

go 1.17
FROM golang:1.17 as builder

# first (build) stage

WORKDIR /app
COPY . .
RUN go mod download
RUN CGO_ENABLED=0 go build -o k8s-for-beginners

# final (target) stage

FROM alpine:3.10
COPY --from=builder /app/k8s-for-beginners /
CMD ["/k8s-for-beginners"]
go mod init k8sapp     # creates a `go.mod`
module k8sapp

go 1.17
FROM golang:1.17 as builder

# first (build) stage

WORKDIR /app
COPY . .
RUN go mod download
RUN CGO_ENABLED=0 go build -o k8s-for-beginners

# final (target) stage

FROM alpine:3.10
COPY --from=builder /app/k8s-for-beginners /
CMD ["/k8s-for-beginners"]
go mod init k8sapp     # creates a `go.mod`
module k8sapp

go 1.17
RUN dos2unix /entrypoint.sh
# For Alpine Linux:
RUN apk add dos2unix
# For Ubuntu:
RUN apt-get install dos2unix
RUN dos2unix /entrypoint.sh
# For Alpine Linux:
RUN apk add dos2unix
# For Ubuntu:
RUN apt-get install dos2unix
#include <cstdio>
int main(void)
{
    printf("Hello World!\n");
    return 0;
}
$ g++ test.cpp
$ readelf -l a.out | grep -i interpreter
      [Requesting program interpreter: /lib64/ld-linux-x86-64.so.2]
$ ldd file | grep "=> /" | awk '{print $3}' | xargs -I '{}' cp -v '{}' /image_root/lib
$ cp a.out image_root/bin/a.out
$ tar -C image_root -cvjSf image_root.tar.bz2 bin lib
FROM scratch
ADD image_root.tar.bz2 /
ENTRYPOINT ["/bin/a.out"]
$ podman build -t test -f Containerfile .
$ podman run --rm test
standard_init_linux.go:228: exec user process caused: no such file or directory
#include <cstdio>
int main(void)
{
    printf("Hello World!\n");
    return 0;
}
$ g++ test.cpp
$ readelf -l a.out | grep -i interpreter
      [Requesting program interpreter: /lib64/ld-linux-x86-64.so.2]
$ ldd file | grep "=> /" | awk '{print $3}' | xargs -I '{}' cp -v '{}' /image_root/lib
$ cp a.out image_root/bin/a.out
$ tar -C image_root -cvjSf image_root.tar.bz2 bin lib
FROM scratch
ADD image_root.tar.bz2 /
ENTRYPOINT ["/bin/a.out"]
$ podman build -t test -f Containerfile .
$ podman run --rm test
standard_init_linux.go:228: exec user process caused: no such file or directory
#include <cstdio>
int main(void)
{
    printf("Hello World!\n");
    return 0;
}
$ g++ test.cpp
$ readelf -l a.out | grep -i interpreter
      [Requesting program interpreter: /lib64/ld-linux-x86-64.so.2]
$ ldd file | grep "=> /" | awk '{print $3}' | xargs -I '{}' cp -v '{}' /image_root/lib
$ cp a.out image_root/bin/a.out
$ tar -C image_root -cvjSf image_root.tar.bz2 bin lib
FROM scratch
ADD image_root.tar.bz2 /
ENTRYPOINT ["/bin/a.out"]
$ podman build -t test -f Containerfile .
$ podman run --rm test
standard_init_linux.go:228: exec user process caused: no such file or directory
#include <cstdio>
int main(void)
{
    printf("Hello World!\n");
    return 0;
}
$ g++ test.cpp
$ readelf -l a.out | grep -i interpreter
      [Requesting program interpreter: /lib64/ld-linux-x86-64.so.2]
$ ldd file | grep "=> /" | awk '{print $3}' | xargs -I '{}' cp -v '{}' /image_root/lib
$ cp a.out image_root/bin/a.out
$ tar -C image_root -cvjSf image_root.tar.bz2 bin lib
FROM scratch
ADD image_root.tar.bz2 /
ENTRYPOINT ["/bin/a.out"]
$ podman build -t test -f Containerfile .
$ podman run --rm test
standard_init_linux.go:228: exec user process caused: no such file or directory
#include <cstdio>
int main(void)
{
    printf("Hello World!\n");
    return 0;
}
$ g++ test.cpp
$ readelf -l a.out | grep -i interpreter
      [Requesting program interpreter: /lib64/ld-linux-x86-64.so.2]
$ ldd file | grep "=> /" | awk '{print $3}' | xargs -I '{}' cp -v '{}' /image_root/lib
$ cp a.out image_root/bin/a.out
$ tar -C image_root -cvjSf image_root.tar.bz2 bin lib
FROM scratch
ADD image_root.tar.bz2 /
ENTRYPOINT ["/bin/a.out"]
$ podman build -t test -f Containerfile .
$ podman run --rm test
standard_init_linux.go:228: exec user process caused: no such file or directory
#include <cstdio>
int main(void)
{
    printf("Hello World!\n");
    return 0;
}
$ g++ test.cpp
$ readelf -l a.out | grep -i interpreter
      [Requesting program interpreter: /lib64/ld-linux-x86-64.so.2]
$ ldd file | grep "=> /" | awk '{print $3}' | xargs -I '{}' cp -v '{}' /image_root/lib
$ cp a.out image_root/bin/a.out
$ tar -C image_root -cvjSf image_root.tar.bz2 bin lib
FROM scratch
ADD image_root.tar.bz2 /
ENTRYPOINT ["/bin/a.out"]
$ podman build -t test -f Containerfile .
$ podman run --rm test
standard_init_linux.go:228: exec user process caused: no such file or directory

Does docker-compose support init container?

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---
x-common-env: &cenv
    MYSQL_ROOT_PASSWORD: totopipobingo

services:
    db:
        image: mysql:8.0
        command: --default-authentication-plugin=mysql_native_password
        environment:
            <<: *cenv
    init-db:
        image: mysql:8.0
        command: /initproject.sh
        environment:
            <<: *cenv
        volumes:
            - ./initproject.sh:/initproject.sh
        depends_on:
            db:
                condition: service_started
    my_app:
        build:
            context: ./php
        environment:
            <<: *cenv
        volumes:
            - ./index.php:/var/www/html/index.php
        ports:
            - 9999:80
        depends_on:
            init-db:
                condition: service_completed_successfully
#! /usr/bin/env bash

# Test we can access the db container allowing for start
for i in {1..50}; do mysql -u root -p${MYSQL_ROOT_PASSWORD} -h db -e "show databases" && s=0 && break || s=$? && sleep 2; done
if [ ! $s -eq 0 ]; then exit $s; fi

# Init some stuff in db before leaving the floor to the application
mysql -u root -p${MYSQL_ROOT_PASSWORD} -h db -e "create database my_app"
mysql -u root -p${MYSQL_ROOT_PASSWORD} -h db -e "create table my_app.test (id int unsigned not null auto_increment primary key, myval varchar(255) not null)"
mysql -u root -p${MYSQL_ROOT_PASSWORD} -h db -e "insert into my_app.test (myval) values ('toto'), ('pipo'), ('bingo')"
---
x-common-env: &cenv
    MYSQL_ROOT_PASSWORD: totopipobingo

services:
    db:
        image: mysql:8.0
        command: --default-authentication-plugin=mysql_native_password
        environment:
            <<: *cenv
    init-db:
        image: mysql:8.0
        command: /initproject.sh
        environment:
            <<: *cenv
        volumes:
            - ./initproject.sh:/initproject.sh
        depends_on:
            db:
                condition: service_started
    my_app:
        build:
            context: ./php
        environment:
            <<: *cenv
        volumes:
            - ./index.php:/var/www/html/index.php
        ports:
            - 9999:80
        depends_on:
            init-db:
                condition: service_completed_successfully
#! /usr/bin/env bash

# Test we can access the db container allowing for start
for i in {1..50}; do mysql -u root -p${MYSQL_ROOT_PASSWORD} -h db -e "show databases" && s=0 && break || s=$? && sleep 2; done
if [ ! $s -eq 0 ]; then exit $s; fi

# Init some stuff in db before leaving the floor to the application
mysql -u root -p${MYSQL_ROOT_PASSWORD} -h db -e "create database my_app"
mysql -u root -p${MYSQL_ROOT_PASSWORD} -h db -e "create table my_app.test (id int unsigned not null auto_increment primary key, myval varchar(255) not null)"
mysql -u root -p${MYSQL_ROOT_PASSWORD} -h db -e "insert into my_app.test (myval) values ('toto'), ('pipo'), ('bingo')"

set git configuration in gitlab CI for default branch to prevent hint message

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test:
  stage: test
  image:
    name: registry.domain.com/project/ci:1.0.0
  before_script:
  script:
    - git config --global init.defaultBranch main
    - echo "something"

Criteria for default garbage collector Hotspot JVM 11/17

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docker run --cpus=1 --rm -it eclipse-temurin:11 java -Xlog:gc* -version
[0.004s][info][gc] Using **Serial**
docker run --cpus=2 --rm -it eclipse-temurin:11 java -Xlog:gc* -version
[0.008s][info][gc     ] Using G1
docker run --cpus=1 --rm -it eclipse-temurin:17 java -Xlog:gc* -version
[0.004s][info][gc] Using Serial
docker run --cpus=2 --rm -it eclipse-temurin:17 java -Xlog:gc* -version
[0.007s][info][gc] Using G1
docker run --cpus=1 --rm -it eclipse-temurin:11 java -Xlog:gc* -version
[0.004s][info][gc] Using **Serial**
docker run --cpus=2 --rm -it eclipse-temurin:11 java -Xlog:gc* -version
[0.008s][info][gc     ] Using G1
docker run --cpus=1 --rm -it eclipse-temurin:17 java -Xlog:gc* -version
[0.004s][info][gc] Using Serial
docker run --cpus=2 --rm -it eclipse-temurin:17 java -Xlog:gc* -version
[0.007s][info][gc] Using G1
docker run --cpus=1 --rm -it eclipse-temurin:11 java -Xlog:gc* -version
[0.004s][info][gc] Using **Serial**
docker run --cpus=2 --rm -it eclipse-temurin:11 java -Xlog:gc* -version
[0.008s][info][gc     ] Using G1
docker run --cpus=1 --rm -it eclipse-temurin:17 java -Xlog:gc* -version
[0.004s][info][gc] Using Serial
docker run --cpus=2 --rm -it eclipse-temurin:17 java -Xlog:gc* -version
[0.007s][info][gc] Using G1
docker run --cpus=1 --rm -it eclipse-temurin:11 java -Xlog:gc* -version
[0.004s][info][gc] Using **Serial**
docker run --cpus=2 --rm -it eclipse-temurin:11 java -Xlog:gc* -version
[0.008s][info][gc     ] Using G1
docker run --cpus=1 --rm -it eclipse-temurin:17 java -Xlog:gc* -version
[0.004s][info][gc] Using Serial
docker run --cpus=2 --rm -it eclipse-temurin:17 java -Xlog:gc* -version
[0.007s][info][gc] Using G1
// This is the working definition of a server class machine:
// >= 2 physical CPU's and >=2GB of memory, with some fuzz
// because the graphics memory (?) sometimes masks physical memory.
// If you want to change the definition of a server class machine
// on some OS or platform, e.g., >=4GB on Windows platforms,
// then you'll have to parameterize this method based on that state,
// as was done for logical processors here, or replicate and
// specialize this method for each platform.  (Or fix os to have
// some inheritance structure and use subclassing.  Sigh.)
// If you want some platform to always or never behave as a server
// class machine, change the setting of AlwaysActAsServerClassMachine
// and NeverActAsServerClassMachine in globals*.hpp.
bool os::is_server_class_machine() {
  // First check for the early returns
  if (NeverActAsServerClassMachine) {
    return false;
  }
  if (AlwaysActAsServerClassMachine) {
    return true;
  }
  // Then actually look at the machine
  bool         result            = false;
  const unsigned int    server_processors = 2;
  const julong server_memory     = 2UL * G;
  // We seem not to get our full complement of memory.
  //     We allow some part (1/8?) of the memory to be "missing",
  //     based on the sizes of DIMMs, and maybe graphics cards.
  const julong missing_memory   = 256UL * M;

  /* Is this a server class machine? */
  if ((os::active_processor_count() >= (int)server_processors) &&
      (os::physical_memory() >= (server_memory - missing_memory))) {
    const unsigned int logical_processors =
      VM_Version::logical_processors_per_package();
    if (logical_processors > 1) {
      const unsigned int physical_packages =
        os::active_processor_count() / logical_processors;
      if (physical_packages >= server_processors) {
        result = true;
      }
    } else {
      result = true;
    }
  }
  return result;
}

Why is ArgoCD confusing GitHub.com with my own public IP?

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ingress:
  enabled: true
  annotations:
    kubernetes.io/ingress.class: nginx
    nginx.ingress.kubernetes.io/backend-protocol: HTTP
    nginx.ingress.kubernetes.io/force-ssl-redirect: "true"
    nginx.ingress.kubernetes.io/rewrite-target: /
  path: /argocd
  hosts:
    - www.example.com
containers: 
  - name: argocd-server 
    image: {{ .Values.server.image.repository }}:{{ .Values.server.image.tag }} 
    imagePullPolicy: {{ .Values.server.image.pullPolicy }} 
    command: 
      - argocd-server 
      - --staticassets - /shared/app - --repo-server - argocd-repo-server:8081 - --insecure - --basehref - /argocd
ingress:
  enabled: true
  annotations:
    kubernetes.io/ingress.class: nginx
    nginx.ingress.kubernetes.io/backend-protocol: HTTP
    nginx.ingress.kubernetes.io/force-ssl-redirect: "true"
    nginx.ingress.kubernetes.io/rewrite-target: /
  path: /argocd
  hosts:
    - www.example.com
containers: 
  - name: argocd-server 
    image: {{ .Values.server.image.repository }}:{{ .Values.server.image.tag }} 
    imagePullPolicy: {{ .Values.server.image.pullPolicy }} 
    command: 
      - argocd-server 
      - --staticassets - /shared/app - --repo-server - argocd-repo-server:8081 - --insecure - --basehref - /argocd
domain <my domain>
search <my domain>

How to edit configmap configuration in spring boot kubernetes application during runtime

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kubectl create configmap some-config \
  --from-file=some-key=some-config.yaml \
  -n some-namespace \
  -o yaml \
  --dry-run | kubectl apply -f - 
apiVersion: v1
kind: ConfigMap
metadata:
  name: jksconfig
data:
  config.json: |-
    {{ .Files.Get "config.json" | indent 4 }}
#bin/bash
kubectl get configmap <configmap-name>  -o yaml > cofig.yaml
kubectl create configmap some-config \
  --from-file=some-key=some-config.yaml \
  -n some-namespace \
  -o yaml \
  --dry-run | kubectl apply -f - 
apiVersion: v1
kind: ConfigMap
metadata:
  name: jksconfig
data:
  config.json: |-
    {{ .Files.Get "config.json" | indent 4 }}
#bin/bash
kubectl get configmap <configmap-name>  -o yaml > cofig.yaml
kubectl create configmap some-config \
  --from-file=some-key=some-config.yaml \
  -n some-namespace \
  -o yaml \
  --dry-run | kubectl apply -f - 
apiVersion: v1
kind: ConfigMap
metadata:
  name: jksconfig
data:
  config.json: |-
    {{ .Files.Get "config.json" | indent 4 }}
#bin/bash
kubectl get configmap <configmap-name>  -o yaml > cofig.yaml
apiVersion: v1
kind: ConfigMap
metadata:
  name: application-conf
data: 
  {{- if .Values.global.applicationConfiguration }}
  application.properties: | 
    {{- .Values.global.applicationConfiguration  | nindent 4 }}
   {{- end }}

Community Discussions

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QUESTION

Microk8s dashboard using nginx-ingress via http not working (Error: `no matches for kind &quot;Ingress&quot; in version &quot;extensions/v1beta1&quot;`)

Asked 2022-Apr-01 at 07:26

I have microk8s v1.22.2 running on Ubuntu 20.04.3 LTS.

Output from /etc/hosts:

127.0.0.1 localhost
127.0.1.1 main

Excerpt from microk8s status:

addons:
  enabled:
    dashboard            # The Kubernetes dashboard
    ha-cluster           # Configure high availability on the current node
    ingress              # Ingress controller for external access
    metrics-server       # K8s Metrics Server for API access to service metrics

I checked for the running dashboard (kubectl get all --all-namespaces):

NAMESPACE     NAME                                             READY   STATUS    RESTARTS   AGE
kube-system   pod/calico-node-2jltr                            1/1     Running   0          23m
kube-system   pod/calico-kube-controllers-f744bf684-d77hv      1/1     Running   0          23m
kube-system   pod/metrics-server-85df567dd8-jd6gj              1/1     Running   0          22m
kube-system   pod/kubernetes-dashboard-59699458b-pb5jb         1/1     Running   0          21m
kube-system   pod/dashboard-metrics-scraper-58d4977855-94nsp   1/1     Running   0          21m
ingress       pod/nginx-ingress-microk8s-controller-qf5pm      1/1     Running   0          21m

NAMESPACE     NAME                                TYPE        CLUSTER-IP       EXTERNAL-IP   PORT(S)    AGE
default       service/kubernetes                  ClusterIP   10.152.183.1     <none>        443/TCP    23m
kube-system   service/metrics-server              ClusterIP   10.152.183.81    <none>        443/TCP    22m
kube-system   service/kubernetes-dashboard        ClusterIP   10.152.183.103   <none>        443/TCP    22m
kube-system   service/dashboard-metrics-scraper   ClusterIP   10.152.183.197   <none>        8000/TCP   22m

NAMESPACE     NAME                                               DESIRED   CURRENT   READY   UP-TO-DATE   AVAILABLE   NODE SELECTOR            AGE
kube-system   daemonset.apps/calico-node                         1         1         1       1            1           kubernetes.io/os=linux   23m
ingress       daemonset.apps/nginx-ingress-microk8s-controller   1         1         1       1            1           <none>                   22m

NAMESPACE     NAME                                        READY   UP-TO-DATE   AVAILABLE   AGE
kube-system   deployment.apps/calico-kube-controllers     1/1     1            1           23m
kube-system   deployment.apps/metrics-server              1/1     1            1           22m
kube-system   deployment.apps/kubernetes-dashboard        1/1     1            1           22m
kube-system   deployment.apps/dashboard-metrics-scraper   1/1     1            1           22m

NAMESPACE     NAME                                                   DESIRED   CURRENT   READY   AGE
kube-system   replicaset.apps/calico-kube-controllers-69d7f794d9     0         0         0       23m
kube-system   replicaset.apps/calico-kube-controllers-f744bf684      1         1         1       23m
kube-system   replicaset.apps/metrics-server-85df567dd8              1         1         1       22m
kube-system   replicaset.apps/kubernetes-dashboard-59699458b         1         1         1       21m
kube-system   replicaset.apps/dashboard-metrics-scraper-58d4977855   1         1         1       21m

I want to expose the microk8s dashboard within my local network to access it through http://main/dashboard/

To do so, I did the following nano ingress.yaml:

apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  annotations:
    kubernetes.io/ingress.class: public
    nginx.ingress.kubernetes.io/backend-protocol: "HTTPS"
  name: dashboard
  namespace: kube-system
spec:
  rules:
  - host: main
    http:
      paths:
      - backend:
          serviceName: kubernetes-dashboard
          servicePort: 443
        path: /

Enabling the ingress-config through kubectl apply -f ingress.yaml gave the following error:

error: unable to recognize "ingress.yaml": no matches for kind "Ingress" in version "extensions/v1beta1"

Help would be much appreciated, thanks!

Update: @harsh-manvar pointed out a mismatch in the config version. I have rewritten ingress.yaml to a very stripped down version:

apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: dashboard
  namespace: kube-system
spec:
  rules:
  - http:
      paths:
      - path: /dashboard
        pathType: Prefix
        backend:
          service:
            name: kubernetes-dashboard
            port:
              number: 443

Applying this works. Also, the ingress rule gets created.

NAMESPACE     NAME        CLASS    HOSTS   ADDRESS     PORTS   AGE
kube-system   dashboard   public   *       127.0.0.1   80      11m

However, when I access the dashboard through http://<ip-of-kubernetes-master>/dashboard, I get a 400 error.

Log from the ingress controller:

192.168.0.123 - - [10/Oct/2021:21:38:47 +0000] "GET /dashboard HTTP/1.1" 400 54 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/94.0.4606.71 Safari/537.36" 466 0.002 [kube-system-kubernetes-dashboard-443] [] 10.1.76.3:8443 48 0.000 400 ca0946230759edfbaaf9d94f3d5c959a

Does the dashboard also need to be exposed using the microk8s proxy? I thought the ingress controller would take care of this, or did I misunderstand this?

ANSWER

Answered 2021-Oct-10 at 18:29
error: unable to recognize "ingress.yaml": no matches for kind "Ingress" in version "extensions/v1beta1"

it' due to the mismatch in the ingress API version.

You are running the v1.22.2 while API version in YAML is old.

Good example : https://kubernetes.io/docs/tasks/access-application-cluster/ingress-minikube/

you are using the older ingress API version in your YAML which is extensions/v1beta1.

You need to change this based on ingress version and K8s version you are running.

This is for version 1.19 in K8s and will work in 1.22 also

Example :

apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: minimal-ingress
  annotations:
    nginx.ingress.kubernetes.io/rewrite-target: /
spec:
  rules:
  - http:
      paths:
      - path: /testpath
        pathType: Prefix
        backend:
          service:
            name: test
            port:
              number: 80

Source https://stackoverflow.com/questions/69517855

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