Questions tagged [healthcheck]
The healthcheck tag has no usage guidance.
108
questions
0
votes
0
answers
70
views
Most lightweight manner (healthcheck) without logging to see if a Linux/macOS system is up?
I've been setting up a HAproxy before two systems that both run postfix and dovecot. As I have it now, I have three public services (one for each port: 25, 587, 993) behind which there are three ...
- 161
0
votes
1
answer
265
views
Can't set up the GCP's external load balancer to work correctly with Terraform
Using Terraform, I want to build an infrastructure that consists of an external load balancer (LB) and a MIG with 3 VMs. Each VM within the MIG should run a server that listens on 80. Furthermore, I ...
google-cloud-platform
0
votes
0
answers
222
views
Kuberhealthy deployment health check fails frequently saying cluster ClusterUnhealthy kuberhealthy
Steps to reproduce:
kuberhealthy runs a deployment check regularly
While the deployment seems to complete it fails to report the status on kuberhealthy service
$ k get events -nkuberhealthy | grep ...
0
votes
0
answers
85
views
AWS set ec2 instance as unhealthy if specific service is down
I have couple of instances part of ASG, these are worker ec2 instances not exposed to the public, there is a systemctl service initialized via user-data, sometimes initializing the service fails for a ...
- 101
1
vote
0
answers
325
views
Instance refresh: "insufficient data to evaluate its health with Amazon EC2"
The instance refreshes for my autoscaling group are taking a very long time due to instances having "insufficient data to evaluate its health with Amazon EC2."
However, the instances are ...
- 317
1
vote
0
answers
161
views
How can I make sure that AWS does not kill tasks before auto scaling kicks in?
I work on an AWS Fargate service which has a health check configured as well as an autoscaling policy set.
The application needs about 30 - 45 seconds to start.
The application does receive traffic ...
- 1,558
1
vote
0
answers
58
views
Programmatically (SH Script) check which server is traffic routed too by HA Proxy
I have 2 HA Proxy servers with Keepalived configured with them, and have 2 backend servers to which traffic is routed by HA Proxy, am writing a shell script that will sync a directory between backend ...
- 111
0
votes
0
answers
125
views
Restarting PM2 when the latency of the API it's serving becomes high
I have an EC2 instance running which is housing a nodeJS/GraphQL based API application. The application is managed via PM2.
I want to have a setup/configuration which can continuously ping one ...
- 117
0
votes
0
answers
31
views
Strange Apache CustomLog behavior
I'm adding a Docker healthcheck function which I've successfully done in one container, but adding the same code to a different container is behaving strangely.
Essentially, I'm simply trying to not ...
- 169
1
vote
1
answer
526
views
How to perform healthcheck on NFS clients connectivity from the NFS-Server?
I have three Debian 11 servers let's call them nfs-server which is the NFS server, nfs1, and nfs2 which are the NFS clients.
I want to perform some sort of health check from the NFS server to ensure ...
- 75
0
votes
1
answer
138
views
Apache httpd: mod_proxy_hcheck URL based HTTP basic authentication
I am trying to use mode_proxy_hcheck to do health checks and failover for an application that requires HTTP Basic authentication.
<proxy balancer://serverpool>
BalancerMember http://username:...
- 101
1
vote
1
answer
916
views
AWS NLB HTTPs health check using mTLS
Is it possible to do a AWS NLB HTTPs health check using mTLS?
I tried setting up a TLS listener, loaded my cert, setup a TLS target group with HTTPs health check, but the health checks are still ...
- 133
0
votes
1
answer
540
views
Keepalived: Transitioning to backup node not happening when check script on master server finds service is down for an applicaiton
I am trying to configure keepalived in such a way that if any application or service running on master node fails, keepalived should consider it as fault and backup node should act as master and take ...
1
vote
1
answer
1k
views
ECS restarts due to health_check failure when multiple other requests are slow to return
We noticed that our ECS Fargate backend services restart due to a health check response timeout:
(service our-site-com-stack-BackendApiServiceStack...) (port 8000) is unhealthy in (target-group arn:...
- 111
0
votes
2
answers
249
views
docker health check for disk space not working as intended
I've got an nginx container which ends up with a full disk after it's been running for about 10 days. So if a new version of the app isn't released, errors start to occur that look like;
2022/01/15 22:...
- 141
0
votes
0
answers
143
views
How to health check a distributed NAT gateway?
I am using Google Cloud Platform and have manually setup a NAT gateway to peer two networks A and B so that workloads in network A have a default gateway which routes packets into network B. The ...
2
votes
1
answer
2k
views
Health Tests on NVMe
On the servers I have, with HDD or SSD, I have a cron that periodically runs:
/usr/sbin/smartctl --test=short/long /dev/sd1
(for each disk)
While it runs, it just looks at the output of /usr/sbin/...
- 533
0
votes
1
answer
47
views
Is there any monitoring tools to create scenarios/dependencies check? [closed]
My team and I got the project to test a new monitoring solution that allow us to :
Perform classical monitoring checks (through SNMP, ping, sensor status, vendor librairies etc...)
Perform checks in ...
- 153
0
votes
2
answers
747
views
Google cloud loadbalancer health checks cause a load on servers
I have configured a load balancer https on google cloud with a health check having following parameters:
healthcheck :
Interval : 30 seconds
Timeout : 15 seconds
Healthy threshold: 1 success
...
0
votes
1
answer
175
views
Using SSH in check of Consul
I have a server with a dockerized Consul Agent (CA). In this CA, I want to run a script from the host who checks how many disk space left in a service check.
For this, I created a service in the CA :
{...
- 121
0
votes
1
answer
2k
views
Ceph Cluster - Reduced data availability: 96 pgs inactive And All OSD Nodes Are Down
I set up my Ceph Cluster by following this document. I have one Manager Node, one Monitor Node, and three OSD Nodes. The problem is that right after I finished setting up the cluster, the ceph health ...
0
votes
2
answers
212
views
How to stop requests on PHP server while it is running cron job sheduled PHP script?
I have a situation when some DDOS attacks are putting my PHP server down. Occasionally.
I'm using AWS with auto scaling groups, so it is not a problem.
The problems start when this server is going ...
-2
votes
1
answer
83
views
Is there an online service for checking the health of online services? [closed]
I have a web service in Amazon WS on port 443. Is there an online service that can monitor my service and email me if, for example, https://myservice.org returns an error?
- 119
0
votes
0
answers
204
views
Implementing Health Check for Websites Hosted Behind a Shared LB
we host 4 web servers behind a shared load balancer. We don't have control over this Citrix NetScaler load balancer. We submit tickets to make changes as needed.
Recently, one of the web servers ...
- 1
0
votes
0
answers
35
views
Check health of my system such as database connections, mainframe connections, messaging services etc
I am so new to this topic that I am not even sure I am asking it correctly but I will give my best. We have number of applications talking to databases such as Oracle and Mainframe and uses messaging ...
- 101
1
vote
1
answer
58
views
AWS autoscaling and ELB, use different health checking mechanism
I need some advice about AWS autoscaling, loadbalancers and health checks:
is it possible to distinguish two health checking mechanism, one is when to send or do not send traffic to an instance (but ...
- 113
0
votes
1
answer
64
views
Proxy HTTPS requests internally to the internet
Due to security reasons, one of our hosts HOST-B doesn't have a connection to the internet. But I need to set up HTTPS traffic to healthchecks.io to monitor cron jobs. All incoming traffic is proxied ...
- 1,473
1
vote
1
answer
831
views
GCP HTTPS LB health check is working but no real traffic getting in, what could explain this?
If the health check is working and the backend service is marked as green (i.e. I do have a firewall rule for the LB hc/traffic), would could explain that no real traffic can get in (I'm getting a 502 ...
0
votes
1
answer
148
views
Creating memory check via nagios core
How to check memory and incoming/outgoing connections of host.
I have created memory usage i am getting error as below.
Name of service:Memory Usage
Status:UNKNOWN
Last Check:03-13-2020 04:05:45
...
- 19
1
vote
1
answer
143
views
Managed instance group autohealing without external IP
I can not seem to find any information on this topic, auto-healing health checks is performed by instances in a google external IP range of 130.211.0.0/22, 35.191.0.0/16.
I'm using a Cloud NAT setup ...
3
votes
1
answer
638
views
How do I exclude health checks from Google Cloud Stackdriver traces
I'm running my app in Google Kubernetes Engine, and the Stackdriver Traces are very useful to determine the health and speed of my app.
However the large majority of request coming into my app are ...
0
votes
1
answer
76
views
App Engine health check not working
This is my app.yaml
runtime: go112
instance_class: B1
manual_scaling:
instances: 1
liveness_check:
path: "/health"
check_interval_sec: 5
timeout_sec: 1
failure_threshold: 1
...
0
votes
1
answer
399
views
How to get loadbalancer reach instance's local service at 8080, AWS
A very green networking person here; working in the AWS environment, and have the following:
EC2 instance up and running; I
AWS Classic loadbalancer (I guess ELB) up and running; LB
LB includes I
LB ...
- 101
0
votes
1
answer
719
views
Does Readiness check keep running after a pod has been marked unready?
My understanding is that after waiting for 45 seconds, Kubernetes is going to hit /heartbeat and wait for the response for 5 seconds. If it doesn't get the response, it is going to try 5 times(every ...
2
votes
1
answer
1k
views
How to configure an AWS ECS health check for a non web app container
I understand that usually for web app containers there needs to be an HTTP endpoint which responds with 200 for a succesful healthcheck.
However, in my case I would have a non web app (a python ...
- 21
-1
votes
1
answer
51
views
Is there a way to setup ping check for remote host in Azure? [closed]
I'm trying to find a way in Azure to setup some service to be able to do ping check on remote host not hosted in Azure and alert when it is not reachable. For example On-Premises server with PIP.
2
votes
1
answer
9k
views
AWS Elastic Load Balancer and target group health check fail for no apparent reason
I have completed my AWS ELB architecture for our website and successfully created the Launch Configuration and Target Groups for which instances are created behind the Load Balancer.
My configuration ...
- 131
1
vote
2
answers
609
views
How to avoid duplicate health-check for the real same server in Haproxy?
Following config file work as expect but do duplicate health-check for the real same proxy-server, how can I avoid such duplicate health-check? (I still want do health-check but not duplicate health-...
- 149
1
vote
1
answer
643
views
HTTP Health Check For Elastic Beanstalk App Triggers Scale / Capacity rules
I have an Elastic Beanstalk application that is running a wordpress application, and I would like some monitoring and scaling triggers for when the health check, the homepage, returns an HTTP response ...
- 111
5
votes
2
answers
3k
views
Verify internal NTP server is sending the correct time?
I have two NTP stratum 3 servers running and wanted to create a simple check that I could tell if either of the servers time drifted and alert that it's not synced properly with the public stratum 2 ...
- 387
0
votes
1
answer
860
views
Veeam target | How to detect CRC errors in time?
A custumer uses Veeam and a NAS as primary backup target. The backups for last days were performed without any errors. Now they cannot restore due to CRC errors. Obviously, the writing to the NAS ...
- 2,105
1
vote
0
answers
289
views
How are load balancers, health checks, and autoscalers supposed to handle surges?
I have a service which looks like: Internet -> Load Balancer -> Instances
What seems to be happening in my service is the following scenario:
A large surge of user traffic comes in, more than the ...
0
votes
1
answer
4k
views
What happens when a pod fails for readiness health check?
I was tracking down an unknown timeout problem in our cluster and found something interesting.
We currently have 30 pods for a service. When I run kubectl get event Those 30 pods have been failing ...
- 2,123
2
votes
0
answers
210
views
Elastic Beanstalk environment and security group config for ELB health checker?
I have an Elastic Beanstalk environment that I can't get Health Checks to work on.
Here's my Elastic Beanstalk's Load Balancer configuration:
My healthcheck URL is /status/
My EC2 security group (...
- 121
3
votes
1
answer
10k
views
Apache load balancer: health check with long timeout
I'm using Apache HTTP Server as a reverse proxy for a couple of Tomcat instances. I've setup load balancing as follows:
<Proxy "balancer://tomcat-app">
BalancerMember "http://10.0.0.1:8080" ...
- 1,085
0
votes
1
answer
136
views
AWS health check and respawn if issue
I have some instances in AWS which I need only one of them, no scaling.
Of course we monitor those instances as well, but before alerting someone. I checked if there's a way in AWS to check for the ...
- 113
2
votes
2
answers
257
views
DNS layer with service discover as resolver not SRV
I need to know is there any solution for solving my problem.
I have a BIND DNS server and consul as service discoverer.
This is what i want as simple diagram:
How can I configure this sample setup ...
- 461
0
votes
0
answers
458
views
Kubernetes Influx DB - Backend Unhealthy
I am trying to deploy Influx DB on Kubernetes. Using the official Influx DB Helm chart.
I am deploying this Helm chart with the following values file:
persistence:
enabled: true
size: 5Gi
...
4
votes
2
answers
11k
views
Configuring correct firewall settings for GCP HTTP load balancer
I have two VMs running HTTP servers on port 8545 as shown in the figure and placed in an instance group.
I created a HTTP load balancer in GCP to balance HTTP requests from end users. However, with ...
2
votes
1
answer
1k
views
Determine load balancer health check timeout
How do you determine reasonable health check timeouts for load balancers?
My application is failing load balancer health checks. I'm using the default health check timeout of 5 seconds, but I've ...
Related Tags
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amazon-web-services × 26
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monitoring × 8
autoscaling × 6
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nginx × 5
aws-fargate × 4
apache-2.4 × 4
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