kubernetes
Apache ZooKeeper
kubernetes | Apache ZooKeeper | |
---|---|---|
12 | 36 | |
90,038 | 11,937 | |
- | 0.4% | |
10.0 | 8.3 | |
almost 2 years ago | 2 days ago | |
Go | Java | |
Apache License 2.0 | Apache License 2.0 |
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
kubernetes
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Installing Kubernetes on mac with vagrant and virtualbox
This is my first attempt to install and use Kubernetes. I am trying to install an environment on Mac for developing my own apps and deploying them for test locally with Kubernetes. I am familiar with using Vagrant, VirtualBox and Docker for the same purpose. When I saw this page https://github.com/GoogleCloudPlatform/kubernetes/blob/master/docs/getting-started-guides/vagrant.md I assumed it would be trivial. I executed these lines:
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How can I specify persistent volumes when defining a Kubernetes replication controller in Google Cloud?
I see in the docs how do do this for pods, but I want to use a replication controller to manage my pods, ensuring that there is always one up at all times.
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Kubernetes API Server: Unable to listen for secure
kube-apiserver.service - Kubernetes API Server Loaded: loaded (/usr/lib/systemd/system/kube-apiserver.service; enabled) Active: active (running) since Mon 2015-08-24 15:03:07 UTC; 5min ago Docs: https://github.com/GoogleCloudPlatform/kubernetes Main PID: 13663 (kube-apiserver) CGroup: /system.slice/kube-apiserver.service └─13663 /usr/bin/kube-apiserver --logtostderr=true --v=0 --etcd\_servers=http://127.0.0.1:4001 --address=0.0.0.0 --port=8080 --kubelet\_port=10250 --allow\_privileged=false --service-cluster-ip-range=10.254.0.0/16 --admission\_control=NamespaceAutoProvision,LimitRanger,SecurityContextDeny,ServiceAccount,ResourceQuota --service\_account\_key\_file=/etc/kubernetes/certs/serviceaccount.key How can i fix this error?
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Does AWS support Kubernetes?
I've read that AWS does not support Kubernetes and builds their own Docker orchestration engine EC2 Container Service. However, on Kubernetes getting-started -page there is a guide on how to run Kubernetes on AWS: https://github.com/GoogleCloudPlatform/kubernetes/blob/master/docs/getting-started-guides/aws.md
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What is the recommended way to upgrade a kubernetes cluster as new versions are released?
I heard here it may be https://github.com/kubernetes/kubernetes/blob/master/cluster/kube-push.sh. If that is the case how does kube-push.sh relate to https://github.com/GoogleCloudPlatform/kubernetes/blob/master/cluster/gce/upgrade.sh?
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Can pods in Kubernetes see/access the processes of other containers running in the same pod?
On this page in the Kubernetes docs Pods, it states
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Reading streaming http response with Python "requests" library
I am trying to consume an event stream provided by the Kubernetesapi using the requests module. I have run into what looks like abuffering problem: the requests module seems to lag by one event.
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What does edge-based and level-based mean?
I read "In other words, the system's behavior is level-based rather than edge-based" from kubernetes documentation:https://github.com/GoogleCloudPlatform/kubernetes/blob/master/docs/api-conventions.md
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kubernetes pod status always "pending"
I am following the Fedora getting started guide (https://github.com/GoogleCloudPlatform/kubernetes/blob/master/docs/getting-started-guides/fedora/fedora_ansible_config.md) and trying to run the pod fedoraapache. But kubectl always shows fedoraapache as pending:
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Pod in Kubernetes always in pending state
systemctl status -l kubelet● kubelet.service - Kubernetes Kubelet Server Loaded: loaded (/usr/lib/systemd/system/kubelet.service; enabled; vendor preset: disabled) Active: active (running) since lun 2016-04-04 08:08:59 CEST; 9min ago Docs: https://github.com/GoogleCloudPlatform/kubernetes Main PID: 2112 (kubelet) Memory: 39.3M CGroup: /system.slice/kubelet.service └─2112 /usr/bin/kubelet --logtostderr=true --v=0 --api-servers=http://kubernetes-master:8080 --address=0.0.0.0 --allow-privileged=false --pod-infra-container-image=registry.access.redhat.com/rhel7/pod-infrastructure:latestapr 04 08:13:33 kubernetes-minion1 kubelet[2112]: W0404 08:13:33.877859 2112 kubelet.go:1690] Orphaned volume "167d0ead-fa29-11e5-bddc-064278000020/default-token-0dci1" found, tearing down volumeapr 04 08:13:53 kubernetes-minion1 kubelet[2112]: W0404 08:13:53.887279 2112 kubelet.go:1690] Orphaned volume "9f772358-fa2b-11e5-bddc-064278000020/default-token-0dci1" found, tearing down volumeapr 04 08:14:35 kubernetes-minion1 kubelet[2112]: I0404 08:14:35.341994 2112 provider.go:91] Refreshing cache for provider: *credentialprovider.defaultDockerConfigProviderapr 04 08:14:35 kubernetes-minion1 kubelet[2112]: E0404 08:14:35.397168 2112 manager.go:1867] Failed to create pod infra container: impossible: cannot find the mounted volumes for pod "wildfly-rc-oroab\_default"; Skipping pod "wildfly-rc-oroab\_default"apr 04 08:14:35 kubernetes-minion1 kubelet[2112]: E0404 08:14:35.401583 2112 pod\_workers.go:113] Error syncing pod 167d0ead-fa29-11e5-bddc-064278000020, skipping: impossible: cannot find the mounted volumes for pod "wildfly-rc-oroab\_default"apr 04 08:14:58 kubernetes-minion1 kubelet[2112]: E0404 08:14:58.076530 2112 manager.go:1867] Failed to create pod infra container: impossible: cannot find the mounted volumes for pod "wildfly-rc-1aimv\_default"; Skipping pod "wildfly-rc-1aimv\_default"apr 04 08:14:58 kubernetes-minion1 kubelet[2112]: E0404 08:14:58.078292 2112 pod\_workers.go:113] Error syncing pod 9f772358-fa2b-11e5-bddc-064278000020, skipping: impossible: cannot find the mounted volumes for pod "wildfly-rc-1aimv\_default"apr 04 08:15:23 kubernetes-minion1 kubelet[2112]: W0404 08:15:23.879138 2112 kubelet.go:1690] Orphaned volume "56257e55-fa2c-11e5-bddc-064278000020/default-token-0dci1" found, tearing down volumeapr 04 08:15:28 kubernetes-minion1 kubelet[2112]: E0404 08:15:28.574574 2112 manager.go:1867] Failed to create pod infra container: impossible: cannot find the mounted volumes for pod "wildfly-rc-43b0f\_default"; Skipping pod "wildfly-rc-43b0f\_default"apr 04 08:15:28 kubernetes-minion1 kubelet[2112]: E0404 08:15:28.581467 2112 pod\_workers.go:113] Error syncing pod 56257e55-fa2c-11e5-bddc-064278000020, skipping: impossible: cannot find the mounted volumes for pod "wildfly-rc-43b0f\_default" Could someone, kindly, help me?Thanks in advance.
Apache ZooKeeper
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On Implementation of Distributed Protocols
Apache ZooKeeper — a distributed coordination, synchronization, and configuration service (written in Java);
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Easy Guide to Integrating Kafka: Practical Solutions for Managing Blob Data
To use Kafka, we also need to deploy a service that keeps configuration informations such as Zookeeper.
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Fault Tolerance in Distributed Systems: Strategies and Case Studies
Failure Detection and Recovery It’s not enough to have backup systems. It’s also crucial to detect failures quickly. Modern systems employ monitoring tools and rely on distributed coordination systems such as Zookeeper or etcd to identify faults in real-time: once detected, recovery mechanisms are triggered to restore the service.
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Reddit System Design/Architecture
zookeeper: is (was?) used for secrets management. it was also used as a basic health check, but has been since been replaced.
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Analysing Github Stars - Extracting and analyzing data from Github using Apache NiFi®, Apache Kafka® and Apache Druid®
You can install Kafka from https://kafka.apache.org/quickstart. Because Druid and Kafka both use Apache Zookeeper, I opted to use the Zookeeper deployment that comes with Druid, so didn’t start it with Kafka. Once running, I created two topics for me to post the data into, and for Druid to ingest from:
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Use AWS CloudFormation to create ShardingSphere HA clusters
Please note that we use Zookeeper as the Governance Center.
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How to choose the right API Gateway
Next, review deployment complexity such as DB-less versus database-backed deployments. For example, Kong does require running Cassandra or Postgres. Apigee requires Cassandra, Zookeeper, and Postgres to run, while other solutions like Express Gateway and Tyk only require Redis. Apache APISIX uses etcd as its data store, it stores and manages routing-related and plugin-related configurations in etcd in the Data Plane.
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In One Minute : Hadoop
ZooKeeper, a system for coordinating distributed nodes, similar to Google's Chubby
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To study Apache Kafka Architecture in details, and how to install, deploy configure Apache kafka.
[Unit] Description=Apache Zookeeper server Documentation=http://zookeeper.apache.org Requires=network.target remote-fs.target After=network.target remote-fs.target [Service] Type=simple ExecStart=/usr/local/kafka/bin/zookeeper-server-start.sh /usr/local/kafka/config/zookeeper.properties ExecStop=/usr/local/kafka/bin/zookeeper-server-stop.sh Restart=on-abnormal [Install] WantedBy=multi-user.target
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ElasticJob 3.0.2 is released including failover optimization, scheduling stability, and Java 19 compatibility
ElasticJob achieves distributed coordination through ZooKeeper. In practical scenarios, users may start multiple jobs in the same project simultaneously, all of which use the same Apache Curator client. There are certain risks due to the nature of ZooKeeper and the callback method of Curator in a single event thread.
What are some alternatives?
kine - Run Kubernetes on MySQL, Postgres, sqlite, dqlite, not etcd.
Hazelcast - Hazelcast is a unified real-time data platform combining stream processing with a fast data store, allowing customers to act instantly on data-in-motion for real-time insights.
config-syncer - 🛡️ Kubernetes Config Syncer (previously kubed)
kubernetes - Production-Grade Container Scheduling and Management
echoip - IP address lookup service
Zuul - Zuul is a gateway service that provides dynamic routing, monitoring, resiliency, security, and more.
kobofileserver - Run it on Kobo device, then use browser to transfer file to device.
JGroups - The JGroups project
Portainer - Making Docker and Kubernetes management easy.
Akka - Build highly concurrent, distributed, and resilient message-driven applications on the JVM
yandex-cloud-controller-manager - Kubernetes Cloud Controller Manager for Yandex.Cloud
etcd - Distributed reliable key-value store for the most critical data of a distributed system