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  • KubeDB

    Run Production-Grade Databases on Kubernetes

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    Stash

    Backup and Recovery Solution for Kubernetes

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    KubeVault

    Run Production-Grade Vault on Kubernetes

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    Voyager

    Secure HAProxy Ingress Controller for Kubernetes

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    ConfigSyncer

    Kubernetes Configuration Syncer

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    Guard

    Kubernetes Authentication WebHook Server

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    KubeDB

    KubeDB simplifies Provision, Upgrade, Scaling, Volume Expansion, Monitor, Backup, Restore for various Databases in Kubernetes on any Public & Private Cloud

    • task_altLower administrative burden
    • task_altNative Kubernetes Support
    • task_altPerformance
    • task_altAvailability and durability
    • task_altManageability
    • task_altCost-effectiveness
    • task_altSecurity
    Stash

    A complete Kubernetes native disaster recovery solution for backup and restore your volumes and databases in Kubernetes on any public and private clouds.

    • task_altDeclarative API
    • task_altBackup Kubernetes Volumes
    • task_altBackup Database
    • task_altMultiple Storage Support
    • task_altDeduplication
    • task_altData Encryption
    • task_altVolume Snapshot
    • task_altPolicy Based Backup
    KubeVault

    KubeVault is a Git-Ops ready, production-grade solution for deploying and configuring Hashicorp's Vault on Kubernetes.

    • task_altVault Kubernetes Deployment
    • task_altAuto Initialization & Unsealing
    • task_altVault Backup & Restore
    • task_altConsume KubeVault Secrets with CSI
    • task_altManage DB Users Privileges
    • task_altStorage Backend
    • task_altAuthentication Method
    • task_altDatabase Secret Engine
    Voyager

    Secure HAProxy Ingress Controller for Kubernetes

    • task_altHTTP & TCP
    • task_altSSL
    • task_altPlatform support
    • task_altHAProxy
    • task_altPrometheus
    • task_altLet's Encrypt
    configsyncer

    Kubernetes Configuration Syncer

    • task_altConfiguration Syncer
    Guard

    Kubernetes Authentication WebHook Server

    • task_altIdentity Providers
    • task_altCLI
    • task_altRBAC
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You are looking at the documentation of a prior release. To read the documentation of the latest release, please visit here.

New to KubeDB? Please start here.

MongoDB Hidden node

Hidden node is a member of MongoDB ReplicaSet. It maintains a copy of the primary’s data set but is invisible to client applications. Hidden members are good for workloads with different usage patterns from the other members in the replica set. For example, You are using an inMemory Mongodb database server, but in the same time you want your data to be replicated in a persistent storage, in that case, Hidden node is a smart choice.

Hidden members must always be priority 0 members and so cannot become primary. The db.hello() method does not display hidden members. Hidden members, however, may vote in elections.

  hidden-node

Considerations

There are some important considerations that should be taken care of by the Database administrators when deploying MongoDB.

Voting

Hidden members may vote in replica set elections. If you stop a voting hidden member, ensure that the set has an active majority or the primary will step down. [reference]

Multiple hosts

Always try to avoid scenarios where hidden-node is deployed on the same host as the primary of the replicaset.

Write concern

As non-voting replica set members (i.e. members[n].votes is 0) cannot contribute to acknowledge write operations with majority write concern, hidden-members have to be voting capable in majority write-concern scenario.

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