Etcd snapshots are not consistent Copy link Space quota. KubeBackup: Automates The resources will be recreated next time S3 is reconciled (the next time snapshots are saved/deleted/pruned) but this does cause a temporary mismatch between what shows up in kubectl get etcdsnapshotfile and kubectl get configmap -n kube-system k3s-etcd-snapshots and what shows up in k3s etcd-snapshot ls (and what's actually in S3). this may be propagating up to the performance we then see in etcd. It always fails on checking the checksum with the following: "sh", I'm running rke etcd snapshot-restore --config rancher-cluster. one of cluster run "etcdctl cluster-health" getting cluseter status is health, but another "etcdctl cluster-health" getting cluster status is unhealth. etcd is a consistent and highly-available key value store used as Kubernetes' backing store for all cluster data. Automating Backups with Tools. Navigate to local cluster and delete the snapshots from the local cluster as follows: This architecture shows the disaster recovery (DR) system's topology for the Kubernetes cluster. The --etcd-disable-snapshots flag does not function as expected. 3 are available to the cluster Before starting an upgrade, read through the rest of this guide to prepare. The description of the flag from the CLI is as follows:--etcd-disable-snapshots (db) Disable automatic etcd snapshots so one would expect the usage of this flag (along with server) to disable automatic snapshot creation. or when etcd is not coming up properly. 11. 0; Downgrading. 0; Benchmarking etcd v2. steps which i followed:-taken etcdctl said restoring snapshots is deprecated, but the etcdutl command that it points to doesn't work either. yaml、rke、kubctl and db file to mathine(10) extra mathine to use etcd snapshot-restore(10)：rke etcd snapshot-restore - So the cluster is running, but I keep getting the message “Etcd snapshots are not consistent” and the snapshot was not recovered (Some deployments I made after taking the I have taken backup of rancher cluster etcd node using rke and tried to restore the backup snapshot. For example, NAMESPACE NAME It must maintain a consistent and “as up-to-date as possible” copy of your primary system in a secondary location that can resume workloads should a disaster cause downtime in the primary region. A snapshot is a consistent view of the etcd store at a specific point in time. Created a downstream rke1 cluster with 2 worker , 1 etcd + cp with s3 details added for etcd snapshots This is sometimes seen on AWS provider and consistently seen on DO providers. frit0-rb asked this question in Q&A. RKE v0. 0. 0-rc; Benchmarking etcd v2. Downgrading etcd clusters and applications; Downgrade etcd from 3. So we need Hi. You can also look into Kubernetes architecture. 运行已经启用etcd-snapshot的集群时，您可以在命令行工具中输入docker logs etcd-rolling-snapshots，查看etcd-rolling-snapshots日志，确认集群是否已开启定时快照功能。 Troubleshooting. 23. yml --name snapshot-name 2. frit0-rb Sep 27, 2024 · 0 In the general case, upgrading from etcd 3. area/etcd-snapshot-restore. Restore of etcd snapshots across different Kubernetes versions may lead to inconsistencies and unstable etcd clusters. Observation: When creating the cluster (with 3 control plane, etcd nodes), the etcd-rolling-snapshot container starts and it tries to use rancher/rke-tools:v0. Unanswered. 5; Upgrade etcd from 3. 4 and 1. Labels. Etcd stores the all details like an object, its state, and cluster To me it sounds like you have a version mismatch between your client and the API. Benchmarking etcd v3; Benchmarking etcd v2. If looking for end-to-end cluster service discovery, etcd will not have enough features; choose Kubernetes, Consul, or SmartStack. Common issues include: Increased Latency: etcd might take This reduces the frequency at which snapshots are taken, allowing etcd to function efficiently without Testing the backups and snapshots. etcdctl is the command line utility that interacts with etcd for ubuntu@ip-172-31-28-49:~$ kubectl get configmap -n kube-system rke2-etcd-snapshots -o yaml apiVersion: v1 data: local-on-demand-ip-172-31-28-49-1701491902: '{"name": leader-elected etcd controllers not consistently functional when leader election/lease mismatches occur #5866. It's a matter of rancher's dev team to implement the etcd snapshot-save to S3 without SSL which I think will never gonna happen since this issue was opened in May 23, 2019 and closed by stale-bot in Oct 9, 2021. Upgrading etcd clusters and applications; Upgrade etcd from 3. RKE 集群可以自动备份 etcd 节点的快照。在灾难场景下，您可以使用这些快照恢复集群。 Then, create snapshots on various nodes i. Started this morning, new on-demand backups and automatic etcd-snapshots are "0" sized and can not be addressed to, even though existent on the servers. 在本节中，你将学习如何创建 K3s 嵌入式 etcd 数据存储的备份，以及如何使用备份恢复集群。 创建快照 . Before you begin Before you follow steps in this page to deploy, This architecture shows the disaster recovery (DR) system's topology for the Kubernetes cluster. This architecture shows the disaster recovery (DR) system's topology for the Kubernetes cluster. Config. k3s etcd-snapshot save Observe that k3s-etcd-snapshots configmap has a corresponding number of snapshots, i. zip $ grep encryptionConfig cluster. zip. 10:53: etcd is a consistent and highly-available key value store used as Kubernetes’ backing store for all cluster data. Comments. You can run etcdctl version to see what version you're using and make sure the client doesn't As of v0. To Reproduce. Basically, Etcd is a very important part of Kubernetes. In fact, it is much more important to take regular snapshots of the etcd database in single control plane node 概述#. YAML 快照是 (YAML) 文件的时间点 You signed in with another tab or window. Works well with S3-compatible storage. 3 to 3. Simple API for working with key-value data. This can lead to removing all etcd snapshots if the issue is not noticed within the retention period. This issue is caused by the incorrect inclusion of the . 90. 8 and below, the rke-bundle-cert container is left over from a failed etcd restore. volume-etcd. Restore of etcd snapshots across different kubernetes versions may lead to inconsistencies and unstable etcd clusters. Set embed. This is because the rolling snapshot container uses the image from the RKEDefaultK8sVersions and not the one from the version being installed. 您可以使用此解决方案手册附带的过程和脚本在主 Kubernetes 集群中创建 etcd 快照，并在另一个（辅助）Kubernetes Kubernetes clusters restore based on etcd snapshots. ETCD snapshots defaults #6885. The space quota in etcd ensures the cluster operates in a reliable fashion. . It works on the raft protocol. 0+git Git SHA: Not provided (use . Reload to refresh your session. Add a verification (at least in tests, i. All runtime, configuration, and metadata information residing in the primary database is replicated from Region 1 to Region 2 with Oracle Autonomous Data Guard. Designed for highly available and consistent storage of shared configuration and service discovery. etcd supports restoring from snapshots that are taken from an etcd process. 2. If you are having an issue with restoring an etcd snapshot then you can do the following on each etcd Version: Master K8s version: 1. Debug field to true to enable gRPC server logs. Projects. This flag will be completely useless in 3. 1 uses a Kubernetes Operator for NetBackup and Velero backup and restore hooks which easily orchestrates the backup and restore of the application on the Kubernetes cluster, so you can focus on your applications and not worry if your data is protected. I am getting error while restoring backup. 0 之前的版本#. ETCD_VERIFY='snapshots') that: the snapshot being produced has consistent cindex with it's expected WAL-log position Kubernetes clusters restore based on etcd snapshots; Configure for Disaster Recovery; (to bring it to a consistent state) At the end of the restore, a report displays the status of the pods and etcd subsystem. etcd has its own built-in snapshot mechanism. It must maintain a consistent and “as up-to-date as possible” copy of your primary system in a secondary location that can resume workloads should a disaster cause downtime in the primary region. If you are having an issue with restoring an etcd snapshot then you can do the following on each 如果您的 Kubernetes 集群发生了灾难，您可以使用rke etcd snapshot-restore来恢复您的 etcd。这个命令可以将 etcd 恢复到特定的快照，应该在遭受灾难的特定集群的 etcd 节点上运行。 当您运行该命令时，将执行以下操作： 移除旧的 etcd 集群; 使用本地快照重建 etcd 集群。 leader-elected etcd controllers not consistently functional when leader election/lease mismatches occur #5866. yml --name mysnapshot NetBackup 9. Development [DEPRECATED] Milestone. Clustering requires manual configuration and management. yml by executing following command: ``` rke etcd snapshot-save --config cluster. For reference: https://github. They have the same name, but they differ slightly in size among the nodes. 4 to 3. seen on k8s 1. etcd stores metadata in a consistent and fault-tolerant way. 24. 6 Steps to reproduce (least amount of steps as possible): Create a DO cluster with 3 nodes having all roles in each Create workloads/ingress Edit the cluster and provide S3 backup config as below: backup It must maintain a consistent and “as up-to-date as possible” copy of your primary system in a secondary location that can resume workloads should a disaster cause downtime in the primary region. One of the key characteristics of etcd snapshots is their consistency. An etcd cluster is meant to provide key-value storage with best of class % etcd --version etcd Version: 3. Data that should have been stored in the snapshot isn't restored to the cluster. 2 Go OS/Arch: linux/amd64 (as packaged by Fedora 30) @spzala No, I don't mean to get snapshots from multiple endpoints. 关于如何为应用开放访问 S3 的权限，请查看 AWS 的文档使用 IAM 角色向在 Amazon EC2 实例上运行的应用程序授予权限。. etcd uses Backend, a design that encapsulates the implementation details of the storage engine and provides a consistent interface to the upper layers. Oats87 opened this issue Apr 29, 2024 · 6 comments Assignees. 4 are available to the cluster Before starting an upgrade, read through the rest of this guide to prepare. 9, the rke-bundle-cert container is removed on both success and failure of a restore. As of v0. The required Kubernetes (K8s) cluster configuration is replicated through ETCD snapshots for control plane protection and Processes, checklists, and notes on upgrading etcd from 3. To ensure backups are consistent and automated, use tools like Velero, Longhorn, and KubeBackup:. the snapshot restore command does not send requests to etcd. the implementation of Backend mainly uses the API provided by BoltDB to add, delete, and check data, so in the following we focus on the implementation of the interface and do not post the code related to Performing snapshots should not result in lost leader heartbeats. If the node reports that the etcd cluster is healthy, a snapshot is created from it and optionally uploaded to S3. What happened? Running etcdctl snapshot restore doesn't actually restore any data to the cluster. All runtime, configuration, and metadata information residing in the primary database is replicated from Region 1 to Region 2 with Oracle $ ls -l /opt/rke/etcd-snapshots/ total 656-rw----- 1 root root 668512 Jun 3 10:43 etcd-snapshot-name. rkestate etcd is designed to reliably store infrequently updated data and provide reliable watch queries. I backkup the etcd, then i copy the cluster. 0-rc-memory; Benchmarking etcd v2. While it does Automatic etcd snapshots not being compressed, while those on demand are compressed #3109. The snapshot can be found in downstream cluster but doesn't exist in the rke2-etcd-snapshots configmap. You signed out in another tab or window. Closed lindhe mentioned this issue Jul 5, 2024. A persistent, multi-version, concurrency-control data model is a good fit for these use cases. If we have multiple endpoints mentioned, I see log below and it consistently happens. 1. Velero: Great for application-level backups and cluster migrations. pkg/flags: recognized and used environment variable ETCD_MAX_SNAPSHOTS=1 rafthttp: health check for peer d5128b7a97976b7a could not connect: dial tcp: lookup volume-etcd-9lxvkk9qzx. It seems that a PUT(key1, val1) on etcd1 timed out, a subsequent put (key1, val2) succeeds, and then it the original PUT(ke etcd and Consul solve different problems. Have not exhausted this avenue yet but certainly can if it's likely to be a Saved searches Use saved searches to filter your results more quickly Part of #12913 This flag isn't needed for v3 store (bbolt), and we are going to bootstrap etcdserver from the consistent_index in v3 store (bbolt). This is mostly because it's signed by an internal CA. chreniuc opened this issue Jun 27, 2022 · 8 comments Assignees. etcd is designed as a general substrate for large scale distributed systems. 7. Also, seen post rancher upgrade, if the details of the s3 are modified. 7+rke2r1. 7 或以上版本可用. 2 to 3. 3. 3 processes and replace them with etcd v3. e. You can find in-depth information about etcd in the official documentation. If your Kubernetes cluster uses etcd as its backing store, make sure you have a back up plan for the data. bak的是宿主机上的（即Volume）路径，而不是容器内部的路径。ETCDCTL_API=3 etcdctl snapshot restore--data-dir ETCDCTL_API=3 etcdctl --endpoints=(注意不要写成K8s内部的IP地址）将该目录移除后各API服务和ETCD服务会停止。 How Snapshots Work For each etcd node in the cluster, the etcd cluster health is checked. kubectl get configmap -n kube-system with the DATA figure matching the number of expected snapshots. I've just created a new RKE2 downstream cluster leader-elected etcd controllers not consistently functional when leader election/lease mismatches occur rke2#5866; Recovery. Automatic snapshots are created in all nodes. In the general case, upgrading from etcd 3. If the keyspace’s backend database for any member exceeds the space quota, etcd I have several problems: Frequent timeouts: (header timeout is 10 seconds) still seems to occur around snapshots. 2, So the cluster is running, but I keep getting the message “Etcd snapshots are not consistent” and the snapshot was not recovered (Some deployments I made after taking the snapshot were still there) So I decided to recover the snapshot “the hardway”: 1 Enhancement Result: It appears Rancher continues to delete snapshots even if a creation is unsuccessful. If the directory is configured on the nodes as a shared mount, it will be overwritten. We can easily backup snapshots from all 3 etcd nodes. 21. The required Kubernetes (K8s) cluster configuration is replicated through ETCD snapshots for control plane protection and understand in what situation a generated snapshot (that is produced within Apply goroutine) is not reflecting the most recent cindex and fix. How can we reproduce it (as minimally and precisely as variable IO can be seen when vmware snapshots are used. F87213-02. Note that in v3. It always fails on checking the checksum with the following: INFO[0015] Waiting for [etcd-checksum-checker] contain basically the restore will restore the snapshot in a temporary location which is /opt/rke/etcd-snapshots-restore/ but if it found this directory not empty then it will exit with an error, also you may have an old etcd-restore container on the host that is preventing a new etcd restore to run correctly, can you delete the directory and the container on all three hosts and try again. We have custom cluster created from Rancher UI with 3 etcd nodes. To test that we can retrieve the state of the K3s cluster we can create a nginx pod. To debug any issues, you will need to look at the logs generated from rke. Supports optional persistence to disk through snapshots and the AOF log. Before starting a disaster recovery procedure, make sure that etcd cluster can’t be recovered:. v1. Upgrade checklists NOTE: When Deleting snapshots from the local cluster, retains the snapshot on the etcd node. v0. root@etcd01:~# docker run -it --net host -v /etc/kubernete It must maintain a consistent and “as up-to-date as possible” copy of your primary system in a secondary location that can resume workloads should a disaster cause downtime in the primary region. I noticed this while trying to restore an ectd snapshot using rke etcd snapshot-restore --name 2022-06-29T10:11:10Z_etcd. restore the above taken backup using rke and same cluster. Previously, [endpoint]:[client-port]/health returned manually marshaled JSON value. zip file extension to In this kubernetes tutorial, you will learn how to backup etcd and restore on Kubernetes cluster with an etcd snapshot. Changed /health endpoint response. etcd stores data in a 注意：因为我的etcd集群是部署在K8s内部，通过VolumeMounts的形式做持久化存储，所以此时需要. 4 processes, new features in v3. 12. yaml --name 202008091207. In Kubernetes architecture, Etcd is a distributed key-value store that So today we will see how we can take a snapshot of the etcd and how to restore this in Kubernetes. These are systems that will never tolerate split-brain operation and are willing to sacrifice availability to achieve this end. 4 can be a zero-downtime, rolling upgrade: one by one, stop the etcd v3. etcd exposes previous versions of key-value pairs to support inexpensive snapshots and watch history events (“time travel queries”). 打开命令行工具，输入rke etcd snapshot-save命令，运行后即可保存 cluster config 文件内每个 etcd 节点的快照。. 文章浏览阅读966次，点赞2次，收藏6次。etcd 作为 Kubernetes 集群的元数据存储，是被业界广泛使用的强一致性 KV 存储，但近日被挖掘出一个存在 3 年之久的数据不一致 bug——client 写入后无法在异常节_etcd snapshots are not consistent You signed in with another tab or window. Take an etcd snapshot from the cluster management page. 默认情况下，快照在系统时间 00:00 和 12:00 启用，会保留 5 个快照。 Learn About Kubernetes Clusters Restore Based on etcd Snapshots It must maintain a consistent and “as up-to-date as possible” copy of your primary system in a secondary location that can resume workloads should a disaster cause downtime in the primary region. Upgrade checklists NOTE: When steps which i followed:- taken backup using rke and cluster. Thanks Unfortunately rancher does not support etcd backups on a S3 server with plain HTTP. Upgrade checklists NOTE: When It must maintain a consistent and “as up-to-date as possible” copy of your primary system in a secondary location that can resume workloads should a disaster cause downtime in the primary region. You switched accounts on another tab or window. 0, v3. October 2024. If looking for a distributed consistent key value store, etcd is a better choice over Consul. Etcd Backup: Basically, We will use etcdctl command line utility to take a snapshot of data. 4; Upgrading. 3 processes after running all v3. svc on 10. 4 It must maintain a consistent and “as up-to-date as possible” copy of your primary system in a secondary location that can resume workloads should a disaster cause downtime in the primary region. This means that all operations that had been committed to the store at the time the snapshot was taken are included in the snapshot. Any operations that were in progress but not yet committed are It is a consistent and distributed and secure key-value store. 1, and v3. The snapshot is stored in /opt/rke/etcd-snapshots. get etcd cluster member list on all healthy control plane nodes with talosctl -n IP etcd members command and compare across all members. /build instead of go build) Go Version: go1. 4 processes after running all v3. etcd: Distributed key-value store. 9. 5 to 3. 3 can be a zero-downtime, rolling upgrade: one by one, stop the etcd v3. the cluster health is ok when etcd sta It must maintain a consistent and “as up-to-date as possible” copy of your primary system in a secondary location that can resume workloads should a disaster cause downtime in the primary region. Additional context / logs: I found the issue rancher/rancher#45141 here, but this issue is not the inconsistent issue for the rke2 and rke2-etcd lease. Longhorn: A distributed block storage system that excels at PVC snapshots and volume backups. While Redis offers replication and persistence options (RDB snapshots, AOF logs) and can achieve some level of fault tolerance, it is not designed as a strongly consistent store. -autoscaler 1 12m rke2-etcd-snapshot-extra-metadata 1 5m45s rke2-etcd-snapshots 5 3m43s rke2-ingress-nginx-controller 1 11m This snapshot might not be fully consistent (if the etcd process is running), but it allows for disaster recovery when latest regular snapshot is not This guide applies to the single control plane clusters as well. My question is, from which etcd node should we use snapshot in case of recovery since they differ in size. 3. Health struct. 3 processes, new features in v3. 3 now defines etcdhttp. NewSQL (Cloud Spanner, CockroachDB, TiDB) What is etcd? etcd is a distributed, consistent key-value store that Kubernetes uses to store all the performance of etcd can degrade if not properly configured. Create a downstream rke2 node driver cluster with 2 nodes. skyman-etcd. Notice how there’s no need to specify any additional parameter in the creation of the pod because the nginx image is by ETCD 备份. Without a space quota, etcd may suffer from poor performance if the keyspace grows excessively large, or it may simply run out of storage space, leading to unpredictable cluster behavior. ; query etcd health across control plane nodes with talosctl -n IP service etcd. 0-rc. Now, force a lease overturn by kubectl edit lease k3s-etcd -n kube-system and change to a I run two members of etcd cluseter on centos7. The snapshot result shows 0B from Rancher UI. yml file by executing the following command: ``` rke etcd snapshot-restore --config cluster. ETCD Backup 是 Kubernetes 控制层的 etcd 组件的备份。etcd 包含所有群集数据的分布式键值存储。创建 ETCD 备份以恢复用于灾难恢复的 Kubernetes 集群非常重要。 YAML 快照. 运行上述命令时，RKE 会创建一个用于备份快照的容器。 It must maintain a consistent and “as up-to-date as possible” copy of your primary system in a secondary location that can resume workloads should a disaster cause downtime in the primary region. 2 processes and replace them with etcd v3. ; If the quorum can be restored, The issue is caused because the container doesn't trust the certificate provided by the S3 server. nhfsyf mnxuoval uta ecvi ruhjfs pomdhm tzslk xbunr jryb uzmfgjcmt owzbo hhjs nzrrid tff vhiz