Compact and Defragment etcd to Reclaim Disk Space
etcd's disk usage grows over time because it keeps old versions of keys, and unless you tell it otherwise, it will keep them forever.
Etcd Articles
48 articles
Configure etcd Database Quota to Prevent Storage Exhaustion
etcd's storage quota is surprisingly easy to hit, and when it does, it can bring down your entire Kubernetes cluster because etcd is the single source o.
Schedule Regular etcd Defragmentation to Maintain Performance
etcd defragmentation is a background maintenance task that reclaims space on disk and improves read performance by reorganizing its underlying key-value.
Recover an etcd Cluster from Quorum Loss
etcd's primary failure mode is losing quorum, meaning a majority of its members can no longer communicate with each other.
Bootstrap an etcd Cluster with Discovery Service
Bootstrapping an etcd cluster with a discovery service means you're setting up a distributed key-value store where new nodes can automatically find and .
Why etcd Requires Low-Latency SSD Storage
etcd, the distributed key-value store that Kubernetes relies on for cluster state, is not just sensitive to storage latency; it's fundamentally designed.
Implement Leader Election in Your App with etcd
etcd's leader election is surprisingly more about distributed consensus than just picking one node. Let's say you have a distributed system where you ne.
Embed etcd Directly into a Go Application
You can embed etcd directly into a Go application, which sounds like a neat trick to avoid managing a separate etcd cluster for development or small dep.
How Kubernetes Uses etcd as Its State Store
Kubernetes doesn't just use etcd; it's fundamentally built on etcd's ability to reliably store and serve distributed state.
Check etcd Endpoint Health and Status with etcdctl
Check etcd Endpoint Health and Status with etcdctl — practical guide covering etcd setup, configuration, and troubleshooting with real-world examples.
etcd Commands Every Operator Should Know
etcd, the distributed key-value store, is the beating heart of Kubernetes, and understanding its command-line tools is crucial for any operator.
Access etcd Over HTTP with the gRPC Gateway
Access etcd Over HTTP with the gRPC Gateway — practical guide covering etcd setup, configuration, and troubleshooting with real-world examples.
Monitor etcd Health with Prometheus Metrics and Alerts
Monitor etcd Health with Prometheus Metrics and Alerts. Prometheus doesn't actually monitor etcd; it collects metrics from etcd that describe its health.
Configure etcd Initial Cluster with Static Bootstrap
The most surprising thing about etcd's static bootstrap is that it's not about "bootstrapping" in the sense of dynamically discovering peers; it's about.
Read, Write, and Delete Keys in etcd with etcdctl and API
etcd's powerful, distributed key-value store is the backbone of many critical systems, but understanding how to manipulate its data is key to managing t.
Run an External etcd Cluster for Kubernetes High Availability
An external etcd cluster for Kubernetes isn't just a backup; it’s the primary data store for your entire cluster, and running it externally offers a mor.
Tune etcd Heartbeat and Election Timeouts to Reduce Latency
Tuning etcd's heartbeat and election timeouts can dramatically improve cluster responsiveness, but it’s not about making things "faster" in a vacuum; it.
How etcd Leader Election Works with Raft Consensus
The most surprising thing about etcd's leader election is that it's not a competition, but a coordinated dance where a leader volunteers and the rest of.
Add Learner Members to etcd for Safe Cluster Expansion
etcd's membership is static by default, meaning you have to manually add new members and then tell existing members about them.
Manage Short-Lived Keys in etcd with Leases and TTL
etcd leases are the unsung heroes of ephemeral state management, ensuring that critical information doesn't linger indefinitely, hogging resources or be.
Build Distributed Locks in Your App with etcd Mutexes
etcd's distributed mutexes allow you to build robust distributed locking directly into your application logic, bypassing the need for external coordinat.
Use the etcd Maintenance API for Defrag and Snapshots
The etcd Maintenance API is your secret weapon for keeping your cluster healthy and recoverable, letting you reclaim space and create point-in-time back.
Add and Remove etcd Members Without Downtime
etcd members can be added or removed without downtime by leveraging its distributed consensus protocol to maintain quorum and data consistency throughou.
Stretch an etcd Cluster Across Multiple Regions
etcd's quorum requirement means that a majority of nodes must be available for the cluster to operate, and this doesn't change when you stretch it acros.
How etcd MVCC Versioning Stores and Retrieves History
etcd doesn't actually store historical versions of your data; it stores the current version and a compact index representing the start of the current tr.
Recover an etcd Cluster After a Network Partition
Recover an etcd Cluster After a Network Partition — practical guide covering etcd setup, configuration, and troubleshooting with real-world examples.
Configure etcd Peer-to-Peer TLS Authentication
etcd peers don't actually verify each other's identity by default when talking TLS, which is a bit like letting people into your house without checking .
Benchmark etcd Performance with the Official Tool
The most surprising thing about benchmarking etcd is that it's not just about measuring how fast it is; it's about understanding its consistency under l.
Query etcd Keys by Prefix and Range
You can actually query etcd keys not just by prefix, but also by a specific range, which is incredibly useful for understanding and managing your cluste.
Monitor etcd with Prometheus and Grafana Dashboards
Monitor etcd with Prometheus and Grafana Dashboards — practical guide covering etcd setup, configuration, and troubleshooting with real-world examples.
How etcd Raft Consensus Keeps Cluster State Consistent
etcd's Raft consensus algorithm is the unsung hero that prevents your distributed system from devolving into a chaotic, inconsistent mess.
Create etcd Users and Roles for Fine-Grained Access Control
etcd doesn't actually enforce fine-grained access control based on users and roles out of the box; you have to enable it.
Debug etcd Slow Followers Falling Behind the Leader
The etcd leader is dropping heartbeats to followers, causing them to fall behind and potentially triggering a leader election, which is a major disrupti.
Back Up and Restore etcd Data with Snapshots
The most surprising thing about etcd backups is that you're not just backing up data, you're backing up the entire distributed state machine in a way th.
Bootstrap an etcd Cluster Statically Without Discovery
The most surprising thing about bootstrapping an etcd cluster statically is that it's actually less complex than you'd think, even without a discovery s.
Understand etcd Storage Limits and How to Stay Under Them
etcd storage is designed to be a tiny, highly consistent, distributed key-value store that powers Kubernetes, and its limits are far tighter than you'd .
Generate and Configure TLS Certificates for etcd
The most surprising thing about TLS certificates for etcd is that they aren't just for encryption; they're primarily for authentication and authorizatio.
Build Atomic Operations in etcd with Compare-and-Swap Transactions
etcd's compare-and-swap CAS transactions are the bedrock for building robust, distributed state machines, not just simple key-value storage.
Perform a Rolling etcd Cluster Upgrade Safely
The most surprising thing about etcd upgrades is that they are designed to be non-disruptive, even though etcd is the beating heart of Kubernetes.
Use the etcd v3 gRPC API Directly
The most surprising thing about using etcd's v3 gRPC API directly is how much simpler it makes distributed consensus for many applications, despite the .
Watch for Key Changes in etcd with the Watch API
etcd's watch API doesn't just tell you that something changed; it tells you precisely what changed, down to the key-value pair and its revision number.
Handle etcd Watcher Reconnects in Your Application
An etcd watcher reconnecting isn't a failure, it's a feature designed to keep your application state synchronized even when network hiccups occur.
Manage etcd Alarms and Quota Exceeded Errors
etcdserver: mvcc: database space exceeded is the alarm you're seeing, which means the etcd database has grown too large and is preventing new writes.
Enable Authentication and RBAC in etcd
etcd authentication and RBAC is enabled by configuring TLS certificates for both the client and server, and then defining Role-Based Access Control RBAC.
Authenticate to etcd from the CLI with TLS and Tokens
Authenticate to etcd from the CLI with TLS and Tokens — practical guide covering etcd setup, configuration, and troubleshooting with real-world examples.
Configure etcd Client-to-Server TLS Authentication
etcd's TLS authentication is fundamentally about ensuring that only authorized clients can talk to your etcd cluster, and that the clients are certain t.
Set Up a Production etcd Cluster with TLS and HA
An etcd cluster's primary role is to be the single source of truth for distributed system state, and its availability is paramount because it's the linc.
Size Your etcd Cluster: 3 vs 5 vs 7 Nodes Explained
Adding more nodes to etcd doesn't always make it faster or more reliable; it's a trade-off between write throughput and fault tolerance, and the sweet s.