I recently add #2936 to help users diagnose this problem, doesn't address the question of changing the behavior but should make it easier for operators to diagnose and recover. Can you show log files where a pod decides to restart because it is not ready? I'll change to the recommendations you reported and get back to you with the details. 3 probes per container every second create a 3 TCP connections per second (it has to wait 60 second on TIME-WAIT state holding the socket) that consume an ephemeral port (we have 28231 per tuple) and a conntrack entry. S3). You could try running kubelet at a higher log level to get more details on what is happening. If no -config.file argument is specified, Loki will look up the config.yaml in the @thockin Conntrack shows hardly 2 or 3 errors. Are you sure you want to create this branch? By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. The supported CLI flags used to reference this configuration block are: The gcs_backend block configures the connection to Google Cloud Storage object storage backend. but after rebooting a worker node, it just keeping ready 0/1 and not working. K8s primitives that manage pods, such . The compactor block configures the compactor component. You switched accounts on another tab or window. Kill the run or debug attempt (look for a red square) and start the emulator from the AVD manager, then wait for it to get to the home screen before trying to run or debug your app. Steps to reproduce the behavior: Expected behavior You will then be prompted to updated the password for the admin account which you can do or skip. I have to leave 1 out, the results are very confusing and not Thank you! Here are a few configuration settings in the ingester_config that are important to maintain Loki's uptime and durability guarantees. The storage_config block configures one of many possible stores for both the index and chunks. to your account. Option 1 is the "right" answer, but may be harder. Well demo all the highlights of the major release: new and updated visualizations and themes, data source improvements, and Enterprise features. After that, memory consumption starts to increase, until the node shuts down. It has to make a connection through CRI, so it should be at least as much. Advice Column: How To Wait For A Woman Who Isn't Ready Is anyone found any solution for auto-healing the Ingester in Cortex? Cpu usage on pod was around 0.001 All targets are marked as "not ready". depending on which mode Loki is launched in. Loki will accept data for that stream as far back in time as 7:00. Note: By signing up, you agree to be emailed related product-level information. Options for runtime configuration reload can also be configured via YAML: Since the beginning of Loki, log entries had to be written to Loki in order The query_scheduler block configures the query-scheduler. I explained that I'm having a great time with him, and I've starting to develop feelings for him. Verify the plugin was install successfully by running the following command. We tend to favor scaling more horizontal vs vertical with our clusters. Email update@grafana.com for help. To disable out-of-order writes for all tenants, Checked that there weren't any cpu aur memory usage spikes also. There was a problem preparing your codespace, please try again. command line. not yet ready. not being prepared. A restart would fix this. 5K 64 64 comments Best Add a Comment queencuntpunt 4 yr. ago Top yikes, that app needs a rework. I have so many people who expect things from me, I'm the oldest sibling and grandchild of my quite religious family. I think almost every instance in this ticket relates to having insufficient network bandwidth for flushing chunks to storage, or sending too much data into too few ingesters. Having read a bit more, I don't think this would materially change things, just move the discussion from "why isn't it ready" to "why hasn't it started"? OS - Centos 7. I increased the flush_op_timeout ingester config from the default 10s, to 10m, and that seems to have fixed it, took a while for it to flush the data but eventually it completed without getting those timeouts while flushing data. Only applies if the selected kvstore is consul. based on the documentation mentioned here - https://cortexmetrics.io/docs/architecture/#query-frontend i have added the CLI flag to querier regarding front end address. is especially useful in making sure your config files and flags are being read and loaded properly. The table_manager block configures the table manager for retention. privacy statement. HTTP API | Cortex Last events for the pod after the restart: There's no event published when the pod is healthy meaning we're missing a liveness probe. if we just scale 3 pods up from 0 it cannot handle the situation. If someone in the thread with a reproducer can get a kubelet pprof of cpu that will help to clarify things, pprof shows a considerable amount of time dialing/http probing, I have to compare against exec probes too. Experiencing this problem in production level application. Successful Readiness Probe. But I don't see any abnormal numbers on CPU or memory or thread count. After digging around in the flusher code, I have some thoughts: It seems that flush_op_timeout limits the time it takes to flush all flushable chunks within a stream(code ref). What happened: Is an arbitrage trading bot between the Kraken CEX and the Karura Defi Platform. Also figured out few logs where we can see that push api is taking more then 10m. I hit this issue in Loki 2.3.0 today. The alertmanager_storage block configures the alertmanager storage backend. Yes, it's a starting point. I guess readiness probe is enough for Node.js app. The expected was that Loki was able to process all the information and not cause OOM events, where the WAL gets stuck and the nodes do not return to the ring. Write a short description about your experience with Grot, our AI Beta. Ready for exclusivity but he's not. Move on or wait it out? Different modes GET /config?mode=diff @tomwilkie will surely know reasoning here. and be accepted with. I'm opening this PR to have a discussion about it. To say the least, it is not building confidence in the ability to keep this thing stable enough to use in prod there aren't even any docs for what to do about this. Ingester knows how much data is being replayed and checks the ingester.wal-replay-memory-ceiling threshold simultaneously. the beginning of their description. The errors 5XX seen in the chart below refer to the moment the ingester is closed due to the OOM problem. on a cluster or per-tenant basis. I've already emphasized that she's not ready for you and, ultimately, because you've told me this, I know you know that, even if desire is urging you to overlook it. The supported CLI flags used to reference this configuration block are: The period_config block configures what index schemas should be used for from specific time periods. #5011 [FEATURE] Query Frontend/Scheduler: Add a new counter metric cortex_request_queue_requests_total for total requests going to queue. You should not run ingester on spot instances, you can loose fresh data by doing so, but if you really want to go ahead you'll have to find a way to forget ingester in the ring automatically. Screenshots, Promtail config, or terminal output, Post "https://storage.googleapis.com/upload/storage/v1/b/loki-example-logs/o?alt=json&name=fake%2F488038805ca808ed%3A17e82e70caf%3A17e81e752a%3A38fd6636&prettyPrint=false&projection=full&uploadType=multipart": context deadline exceeded, level=error ts=2022-01-28T16:08:38.985959868Z caller=flush.go:221 org_id=fake msg="failed to flush user" err="Post \"https://storage.googleapis.com/upload/storage/v1/b/loki-example-logs/o?alt=json&name=fake%2F488038805ca808ed%3A17e82e70caf%3A17e81e752a%3A38fd6636&prettyPrint=false&projection=full&uploadType=multipart\": context deadline exceeded. When a memberlist config with atleast 1 join_members is defined, kvstore of type memberlist is automatically selected for all the components that require a ring unless otherwise specified in the components configuration section. region: us-west1 has native support in Grafana (needs Grafana v6.0). We recently upgraded from Istio 1.4.4 to 1.5.4 and started seeing the issues described by OP. How feasible is a manned flight to Apophis in 2029 using Artemis or Starship? This is issue is solved for me by changing the disk type used by wal-data PVC. The other pods are running fine. We also have this problem where the ingester set doesn't come back up because of this catch-22 where the first ingester doesn't report readiness since it can't contact the others in the set, and the others are not scheduled to start until the first instance reports readiness. Sign in Sign up for a free GitHub account to open an issue and contact its maintainers and the community. Parameters that are made stable will be classified as either basic or advanced. As well the /var/logs/ folder is empty in Promtail. sending a HTTP POST request to the /reload endpoint (when the --server.enable-runtime-reload flag is enabled). In the example above, we create a connections at a rate of 3 per pod with 100 pods = 300 connections per second, that will be freed after 60 seconds. Where I noticed that this problem started to occur with intake scales greater than 50mb/s, something like 90/100mb/s. Common configuration to be shared between multiple modules. Getting Started with Grafana Loki, Part 1: The Concepts early adopters and Mimir developers to gain confidence with new And since iptables version is 1.4.21, --random-fully is not being implemented. I noticed the ingesters are marked unhealthy: The CI build mentioned in this issue #75 also shows the same behavior. Loki ingester has a parameter that controls how long flush operations can take (flush_op_timeout). I'm afraid the only way to know more is to get something like a tcpdump from both inside and outside the pod, which captures one or more failing requests. I couldn't even get a size=1 ingester ring to come up it just flaps between PENDING, ACTIVE, and LEAVING, the same as a much larger one. Grafana for querying and displaying the logs. I believe Cortex has this for store-gateway, ruler and alertmanager. On MacOS go to the whale in the taskbar > Preferences > Docker Engine. In our case, timeouts were not related to application but related to specific nodes in cluster. However, I think the main use case for people is having Cortex self-healing. re-use the connection when it can? Here are more details of what I've been investigating about loki ingester. You switched accounts on another tab or window. -print-config-stderr is nice when running Loki directly e.g. Can you copy/paste the configuration(s) that you are having problems with? What are you trying to achieve? Calling exec should eat MORE cpu time than an HTTP probe, I think. The TIME_WAIT period for the socket is a constant of the kernel, however, users can override it per socket using the SO_LINGER options. on Feb 23, 2021 Hi, i am close to get cortex block storage cluster together. At this point we are still seeing it and not sure what the root cause is. It seems that the problem starts to occur when the flush queue is greater than > 0 over a period. Migrate from single zone to zone-aware replication For non-list parameters the Grafana Labs uses cookies for the normal operation of this website. go to the /config HTTP API endpoint. @slim-bean, @kavirajk The store_gateway block configures the store-gateway component. Does ECDH on secp256k produce a defined shared secret for two key pairs, or is it implementation defined? the command-line flags take precedence over values in a YAML file. For example, if you see the above get pods, readiness probe of one pod is failing almost every day. Now I'm about to remove liveness probe after finding out this comment. This seems like it would cause unbounded memory growth and eventually an OOM kill. And it is still happening. which contains information on the Loki server and its individual components, Write Ahead Log | Grafana Loki documentation I think this is the same issue reported here, and the issue is closed. In Loki I have no logs. favorite On Mon, Jan 16, 2023 at 3:37 PM Antonio Ojea ***@***. Only applies if the selected kvstore is etcd. @derekwaynecarr have you heard any other reports of this? Example: Maybe a distinct process from kubelet? I think we need to figure out what context is getting canceled, i'm not sure there is much you can do to find this other than maybe enable debug logs?? We read every piece of feedback, and take your input very seriously. I also didn't see any errors in grafana or Loki, as the logs were never pushed to Loki. Sign up for a free GitHub account to open an issue and contact its maintainers and the community. Ingesters don't flush series to blocks at shutdown by default. I'm not sure what the bottleneck is though, is your upload connection to the cloud storage sufficiently large? The grpc_client block configures the gRPC client used to communicate between two Mimir components. Were you able to figure it out? You switched accounts on another tab or window. the beginning of their description. Do we need to find a way to give the probers more CPU scheduling time? Query front end not working with querier #3866 - GitHub Configures the querier. I changed concurrent_flush to 4 (default value is 16), but I didn't notice any real improvement on the identified problem. Dec 23, 2017. Note: By signing up, you agree to be emailed related product-level information. that the order of configs reads correctly top to bottom when viewed in Grafanas Explore. This is the password to encrypt your credentials. There are strong use cases for altered values. Is there any way you can help boil down a simpler reproduction? The ingester_client block configures how the distributor will connect to ingesters. View the bot's Grafana Dashboard by navigating to localhost:3000. 4GB is not a small number, so it's better to check whether the default setting fits. but not kubelet cpu time :) , I think the kubelet is the bottleneck, since and the stream {foo="bar"} has one entry at 8:00, Still valid. Previously i had pd-standard disk type in gcp and saw that I/O Utilization is reaching 100%. Including disabling FIFO cache and changing index_cache_validity. See that it seems that the checkpoints present in the WAL are locked and it seems that it is not possible to release them, due to the errors present in the message: failed to flush user, thanks @marcusteixeira. Memory consumption is 60-65% per node. In Loki I have no logs. If you configure Mimir with a removed parameter, Mimir will fail to start. To see all available qualifiers, see our documentation. This config is what Loki will use to run, it can be invaluable for debugging issues related to configuration and And in logs of that pod with nginx I didn't find the request generated by this probe: If I restart the kubelet - the error don't disappear. Why is kubelet opening new connections for every probe? msg="found an existing instance(s) with a problem in the ring, this instance cannot become ready until this problem is resolved. New ingesters not ready if there's a faulty ingester in the ring. Hi Guys, Experimental parameters will remain experimental until they are either made stable or removed. Once updated, you have to restart Docker. not that far. Promtail can reload its configuration at runtime. If loki fails then it has to be manually scaled to 0 and spinned 1 by 1. The frontend block configures the query-frontend. I think that option 2 for probes is the best option, less disruptive and Your message has been received! I've noticed that ingesters are being impacted with OOM events, which kills all the nodes in the ring, until most of the nodes are in an unhealthy state.After that, the WAL process is activated, but the node is stuck in this process and with that there is no return to the ring. It does. Couple Nginx+PHP Pods running on huge instances in parallel with couple other small applications. I deployed a daemonset: Then i started to listen events on all pods of this daemonset. endpoint: s3://foo-bucket The etcd block configures the etcd client. Only way to get this ingester to ready state is to delete the PVC and restart the pod. After a couple of time i received next events: Those events where on ~50% of pods of this daemonset. StartupProbe was added as Alpha in K8s 1.16 and on by default from 1.18. Grafana Labs uses cookies for the normal operation of this website. Thank you for your contributions. If you specify both the command-line flags and YAML configuration parameters, The supported CLI flags used to reference this configuration block are: The bos_storage_config block configures the connection to Baidu Object Storage (BOS) object storage backend. Waiting to be "ready" for dating since about 15 years now Brackets indicate that a parameter is optional. If so, this would multiply the amount of data each ingester processes by the replication_factor. The flusher block configures the WAL flusher target, used to manually run one-time flushes when scaling down ingesters. In our 13 node cluster, node 1 to 4 had some kind of issue wherein the pods running on these nodes had random failures due to timeouts. In a new terminal setup a port-forward to access pod ingester-2 and started curling the ready endpoint: Basically, the ingester pod is waiting to connect to the other ingesters. I am currently facing issue with respect to connecting query front end with queriers. Run the arbitrage bot with Docker by running the following command. Loki ingester is unhealthy, readiness probe returns 503, https://buildkite.com/opstrace/prs/builds/3171#91fe0b5b-aa9f-4ad4-ad14-49b54a383dbb/3971-4749, https://buildkite.com/opstrace/prs/builds/3165#6357df46-61ad-4aa0-bda7-881c7c8b0b14/2261-4062. Sign in Configures the server of the launched module(s). replication_factor The replication factor, which has already been mentioned, is how many copies of the log data Loki should make to prevent losing it before flushing to storage. Grafana-Loki: Loki Grafana Labs - Gitee Before this OOM Issue i was running 3 ingester with 30G of Memory and after this OOM issue i am running 5 ingester with 40G of memory. Create a free account to get started, which includes free forever access to 10k metrics, 50GB logs, 50GB traces, 500VUh k6 testing & more. What you expected to happen: He said he doesn't want to close the dating door yet. store-1: what is the resolution for this? Not ingester. As well the /var/logs/ folder is empty in Promtail. The aws_storage_config block configures the connection to dynamoDB and S3 object storage. I think that option 2 for probes is the best option, less disruptive and the results I obtained locally are very promising. Named store from this example can be used by setting object_store to store-1 in period_config. Connection refused with Loki and Promtail setup I run ingesters in a Deployment and I don't think I've observed that. Each variable reference is replaced at startup by the value of the environment variable. Each variable reference is replaced at startup by the value of the environment variable. The ingester block configures the ingester and how the ingester will register itself to a key value store. Also: net.netfilter.nf_conntrack_tcp_timeout_time_wait = 120 - isn't that the TIME_WAIT period? Your message has been received! You are required to have balances on both platforms to cover transaction fees. Scaling down A running ingester holds several hours of time series data in memory, before they're flushed to the long-term storage. Increasing the flush_op_timeout can reduce the likelyhood of this happening but it's more of a crude workaround than a fix. All the evidence above is related to the moment we had the memory leak problem. A configuration reload is triggered by sending a SIGHUP to the Promtail process or If a waiting message is displayed, such as "Ingester not ready: waiting for 15s after being ready" just refresh the page until the ready message is presented. This project was created through Encode Club's Polkadot and Hack Defi Hackathons. In order to simplify Mimir configuration, we categorize parameters by I first successfuly upgraded my ELasticsearch cluster from 6.5.4 to 6.8.13 as a step to move to 7.10.1. These parameters permit Kernel - 4.4.218-1 Well occasionally send you account related emails. In logs of pod there are only message with response code 200 (from my requests and requests of readiness probes): It means that part of probes are successful. if you are running your compute on prem and trying to use a cloud object store you're probably gonna struggle). I'm a beta, not like one of those pretty fighting fish, but like an early test version. The supported CLI flags used to reference this configuration block are: The frontend_worker block configures the worker running within the querier, picking up and executing queries enqueued by the query-frontend or the query-scheduler. -log-config-reverse-order is the flag we run Loki with in all our environments, the config entries are reversed so The ruler_storage block configures the ruler storage backend. How to know when a Kubernetes service is ready after a deployment Running on Azure Kubernetes Service overrides from config file, and second by overrides from flags. Interface not ready, waiting for it to come up | FOG Project Out-of-order writes are enabled globally by default, but can be disabled/enabled #5030 [FEATURE] Build ARM docker images. If we can prove that it was the pod that timed out, at least we can say "we do X, Y, Z to give probes the highest prio on the kubelet side, you need to do A, B, C to make sure you respond to to them" and "look here to see the proof that we sent the request - you didn't respond". Partially generated records are not the same as a partially functional server. The compactor block configures the compactor component, which compacts index shards for performance. Verify the Loki log aggregation service is ready to ingest logs by navigating to localhost:3100/ready. Can a Rogue Inquisitive use their passive Insight with Insightful Fighting? Loki ingester is unhealthy, readiness probe returns 503 #127 - GitHub For Loki: This issue is only resolved when we forget the Ingester ring from Distributor in Cortex. Well demo all the highlights of the major release: new and updated visualizations and themes, data source improvements, and Enterprise features. to set values that need to be configurable during deployment. I am still facing the same issue The supported CLI flags used to reference this configuration block are: The s3_backend block configures the connection to Amazon S3 object storage backend. In particular: The text was updated successfully, but these errors were encountered: My understanding is that it is used to stop rollout in case of any problems in the ring and make operator to investigate and fix (or just "forget" bad entry). It is now read-only. Sign in # CLI flag: -ingester.min-ready-duration [min_ready_duration: <duration> | default = 15s] # Name of network interface to read address from. Successfully merging a pull request may close this issue. The supported CLI flags used to reference this configuration block are: The redis block configures the Redis-based caching backend. Not seen that either. Does that mean I am losing logs ? Log entries with timestamps that are after this earliest time are accepted. So, we'll have a constant number of 59x300 = 17700 sockets in TIME-WAIT and conntrack entries just for having the probes, that doesn't seem to be worrisome if we have 262144 conntrack entries, but it leaves only 28231 - 17700 ephemeral ports for things like DNS and any other hostNetwork stuff. The ingester_client block configures how the distributors connect to the ingesters. The query_range block configures the query splitting and caching in the Loki query-frontend. You signed in with another tab or window. Follow the upgrade instructions for 4.0.0 in the CHANGELOG.md . We have replication > 1 and using snappy. @zetaab your logs say there were two pods not heartbeating. The query_scheduler block configures the Loki query scheduler. K8s Elasticsearch with filebeat is keeping 'not ready' after rebooting Barolo: I Am Not Ready. Wait! - Grape Collective This is segmented into 6 write nodes. rev2023.7.24.43543. #2913) and I'm also not much sure of this logic makes sense when running Cortex chunks storage with WAL or the Cortex blocks storage. Then i stopped the curl script (because the big number of logs). i changed flush_op_timeout to 10m, changed snappy to gzip and also tried to removing PVC and restart Ingester. But it's not a good solution to solve this. A tag already exists with the provided branch name. I applied the changes that were reported, but but were not effective. Ready to be married, not ready for a wedding : r/Waiting_To_Wed