I have created a routes for my service in the OpenShift,
oc get routes
NAME HOST/PORT PATH SERVICES PORT
simplewebserver simpleweb.apps.devcluster.os.fly.com simplewebserver 9999
When I ran command: curl http://simpleweb.apps.devcluster.os.fly.com/world
it failed to access my web service. I suspect my route has some problem, but I could not see any route debug information.
My question is, how to find the route pod in the OpenShift Or how to find some route activity information when I access route?
You can check the router logs in logs container of router pods. in our OCP cluster i could see router pods in openshift-ingress namespace.
oc get pods -n openshift-ingress
NAME READY STATUS RESTARTS AGE
router-default-5f9c4b6cb4-12121a 2/2 Running 0 40h
router-default-5f9c4b6cb4-12133a 2/2 Running 0 40h
To get the logs, use below command,
oc -n openshift-ingress -c logs logs -f <router_pod_name>
Also make sure haproxy logs are enabled to find out urls getting hit via router.
https://access.redhat.com/solutions/3397701
As there is limited information about your problem. Here are few things you can try.
Try to curl using a port
curl -kv http://simpleweb.apps.devcluster.os.fly.com:9999
Access the pod logs for which the route was created. Check the service simplewebserver is using the correct selector to route the traffic to the pod.
Do a oc describe service simplewebserver to see the selectors being used.
Check if any network policy is blocking the external traffic.
Check if you can access the target pod using that service from within the same namespace. You can do that by rsh to a pod and then access the service using:
curl -kv http://servicename.projectname.svc.cluster.local
Related
My structure
Kubernetes cluster on GKE
Ingress controller deployed using helm
An application which will return list of IP ranges note: it will get updated periodically
curl https://allowed.domain.com
172.30.1.210/32,172.30.2.60/32
Secured application which is not working
What I am trying to do?
Have my clients IPs in my API endpoint which is done
curl https://allowed.domain.com
172.30.1.210/32,172.30.2.60/32
Deploy my example app with ingress so it can pull from the https://allowed.domain.com and allow people to access to the app
What I tried and didn't work?
Deploy the application with include feature of nginx
nginx.ingress.kubernetes.io/configuration-snippet: |
include /tmp/allowed-ips.conf;
deny all;
yes its working but the problem is when /tmp/allowed-ips.conf gets updated the ingress config doesn't
I tried to use if condition to pull the IPs from the endpoint and deny if user is not in the list
nginx.ingress.kubernetes.io/configuration-snippet: |
set $deny_access off;
if ($remote_addr !~ (https://2ce8-73-56-131-204.ngrok.io)) {
set $deny_access on;
}
I am using nginx.ingress.kubernetes.io/whitelist-source-range annotation but that is not what I am looking for
None of the options are working for me.
From the official docs of ingress-nginx controller:
The goal of this Ingress controller is the assembly of a configuration file (nginx.conf). The main implication of this requirement is the need to reload NGINX after any change in the configuration file. Though it is important to note that we don't reload Nginx on changes that impact only an upstream configuration (i.e Endpoints change when you deploy your app)
After the nginx ingress resource was initially created, the ingress controller assembles the nginx.conf file and uses it for routing traffic. Nginx web server does not auto-reload its configuration if the nginx.conf and other config files were changed.
So, you can work around this problem in several ways:
update the k8s ingress resource with new IP addresses and then apply changes to the Kubernetes cluster (kubectl apply / kubectl patch / smth else) / for your options 2 and 3.
run nginx -s reload inside an ingress Pod to reload nginx configuration / for your option 1 with include the allowed list file.
$ kubectl exec ingress-nginx-controller-xxx-xxx -n ingress-nginx -- nginx -s reload
try to write a Lua script (there is a good example for Nginx+Lua+Redis here and here). You should have a good understanding of nginx and lua to estimate if it is worth trying.
Sharing what I implemented at my workplace. We had a managed monitoring tool called Site24x7. The tool pings our server from their VMs with dynamic IPs and we had to automate the whitelisting of the IPs at GKE.
nginx.ingress.kubernetes.io/configuration-snippet allows you to set arbitrary Nginx configurations.
Set up a K8s CronJob resource on the specific namespace.
The CronJob runs a shell script, which
fetches the list of IPs to be allowed (curl, getent, etc.)
generates a set of NGINX configurations (= the value for nginx.ingress.kubernetes.io/configuration-snippet)
runs a kubectl command which overwrites the annotation of the target ingresses.
Example shell/bash script:
#!/bin/bash
site24x7_ip_lookup_url="site24x7.enduserexp.com"
site247_ips=$(getent ahosts $site24x7_ip_lookup_url | awk '{print "allow "$1";"}' | sort -u)
ip_whitelist=$(cat <<-EOT
# ---------- Default whitelist (Static IPs) ----------
# Office
allow vv.xx.yyy.zzz;
# VPN
allow aa.bbb.ccc.ddd;
# ---------- Custom whitelist (Dynamic IPs) ----------
$site247_ips # Here!
deny all;
EOT
)
for target_ingress in $TARGET_INGRESS_NAMES; do
kubectl -n $NAMESPACE annotate ingress/$target_ingress \
--overwrite \
nginx.ingress.kubernetes.io/satisfy="any" \
nginx.ingress.kubernetes.io/configuration-snippet="$ip_whitelist" \
description="*** $(date '+%Y/%m/%d %H:%M:%S') NGINX annotation 'configuration-snippet' updated by cronjob $CRONJOB_NAME ***"
done
The shell/bash script can be stored as ConfigMap to be mounted on the CronJob resource.
I am trying to follow the istio gateway and Virtual Service guide at - https://istio.io/docs/tasks/traffic-management/ingress/ingress-control/#determining-the-ingress-ip-and-ports
I can see that these resources (Gateway & VS) are created from Kiali and also from command line. When I try to access my endpoint at curl -I -HHost:httpbin.example.com http://$INGRESS_HOST:$INGRESS_PORT/status/200 I get a 403 Forbidden error.
I am looking at the istio-proxy logs at
k logs httpbin-pod -c istio-proxy -n my-bookinfo
and dont see much there. I am trying to figure out where I can start to debug the issue. Any ideas? (edited)
I guess the HTTP 403 issue might be connected with Istio Authorization or Authentication mesh configurations, assuming that you've successfully injected Envoy sidecar into the particular Pod or widely across related namespaces.
The logs inspection might be most issue explainable task, confirming that Envoy's Access Logs are already enabled, you can look through relevant istio-proxy sidecar and istio-ingressgateway Pod logs; whereas you can fetch Envoy proxy response flags and traffic path workflow:
$ kubectl logs -l app=httpbin -c istio-proxy
[2019-03-06T09:31:27.360Z] "GET /status/418 HTTP/1.1" 418 - "-" 0 135
5 2 "-" "curl/7.60.0" "d209e46f-9ed5-9b61-bbdd-43e22662702a"
"httpbin:8000" "127.0.0.1:80"
inbound|8000|http|httpbin.default.svc.cluster.local - 172.30.146.73:80
172.30.146.82:38618 outbound_.8000_._.httpbin.default.svc.cluster.local
Check Authentication Policies within a mesh, that can affect sidecars proxy behavior and revise a global mesh policy in terms of mTLS authentication, Permissive mode is enabled by default:
$ kubectl get policies.authentication.istio.io --all-namespaces
$ kubectl get meshpolicy.authentication.istio.io default -oyaml
If you launched Authorization rules within a mesh, verify all the corresponded RBAC policies:
$ kubectl get clusterrbacconfigs.rbac.istio.io --all-namespaces
$ kubectl get authorizationpolicies.rbac.istio.io,rbacconfigs.rbac.istio.io,servicerolebindings.rbac.istio.io,serviceroles.rbac.istio.io --all-namespaces
Find more related information about troubleshooting steps in the official Istio documentation.
I have an application running in Openshift Online starter, which worked for the last 5 months. A single pod behind a service with a route defined that does edge tls termination.
Since Saturday, when trying to access the application, I get the error message
Application is not available
The application is currently not serving requests at this endpoint. It may not have been started or is still starting.
Possible reasons you are seeing this page:
The host doesn't exist. Make sure the hostname was typed correctly and that a route matching this hostname exists.
The host exists, but doesn't have a matching path. Check if the URL path was typed correctly and that the route was created using the desired path.
Route and path matches, but all pods are down. Make sure that the resources exposed by this route (pods, services, deployment configs, etc) have at least one pod running.
The pod is running, I can exec into it and check this, I can port-forward to it and access it.
checking the different components with oc:
$ oc get po -o wide
NAME READY STATUS RESTARTS AGE IP NODE
taboo3-23-jt8l8 1/1 Running 0 1h 10.128.37.90 ip-172-31-30-113.ca-central-1.compute.internal
$ oc get svc
NAME CLUSTER-IP EXTERNAL-IP PORT(S) AGE
taboo3 172.30.238.44 <none> 8080/TCP 151d
$ oc describe svc taboo3
Name: taboo3
Namespace: sothawo
Labels: app=taboo3
Annotations: openshift.io/generated-by=OpenShiftWebConsole
Selector: deploymentconfig=taboo3
Type: ClusterIP
IP: 172.30.238.44
Port: 8080-tcp 8080/TCP
Endpoints: 10.128.37.90:8080
Session Affinity: None
Events: <none>
$ oc get route
NAME HOST/PORT PATH SERVICES PORT TERMINATION WILDCARD
taboo3 taboo3-sothawo.193b.starter-ca-central-1.openshiftapps.com taboo3 8080-tcp edge/Redirect None
I tried to add a new route as well (with or without tls), but am getting the same error.
Does anybody have an idea what might be causing this and how to fix it?
Addition April 17, 2018: Got an email from Openshift Online support:
It looks like you may be affected by this bug.
So waiting for it to be resolved.
The problem has been resolved by Openshift Online, the application is working again
I'm trying to setup a private ethereum test network using Puppeth (as Péter Szilágyi demoed in Ethereum devcon three 2017). I'm running it on a macbook pro (macOS Sierra).
When I try to setup the ethstat network component I get an "docker configured incorrectly: bash: docker: command not found" error. I have docker running and I can use it fine in the terminal e.g. docker ps.
Here are the steps I took:
What would you like to do? (default = stats)
1. Show network stats
2. Manage existing genesis
3. Track new remote server
4. Deploy network components
> 4
What would you like to deploy? (recommended order)
1. Ethstats - Network monitoring tool
2. Bootnode - Entry point of the network
3. Sealer - Full node minting new blocks
4. Wallet - Browser wallet for quick sends (todo)
5. Faucet - Crypto faucet to give away funds
6. Dashboard - Website listing above web-services
> 1
Which server do you want to interact with?
1. Connect another server
> 1
Please enter remote server's address:
> localhost
DEBUG[11-15|22:46:49] Attempting to establish SSH connection server=localhost
WARN [11-15|22:46:49] Bad SSH key, falling back to passwords path=/Users/xxx/.ssh/id_rsa err="ssh: cannot decode encrypted private keys"
The authenticity of host 'localhost:22 ([::1]:22)' can't be established.
SSH key fingerprint is xxx [MD5]
Are you sure you want to continue connecting (yes/no)? yes
What's the login password for xxx at localhost:22? (won't be echoed)
>
DEBUG[11-15|22:47:11] Verifying if docker is available server=localhost
ERROR[11-15|22:47:11] Server not ready for puppeth err="docker configured incorrectly: bash: docker: command not found\n"
Here are my questions:
Is there any documentation / tutorial describing how to setup this remote server properly. Or just on puppeth in general?
Can I not use localhost as "remote server address"
Any ideas on why the docker command is not found (it is installed and running and I can use it ok in the terminal).
Here is what I did.
For the docker you have to use the docker-compose binary. You can find it here.
Furthermore, you have to be sure that an ssh server is running on your localhost and that keys have been generated.
I didn't find any documentations for puppeth whatsoever.
I think I found the root cause to this problem. The SSH daemon is compiled with a default path. If you ssh to a machine with a specific command (other than a shell), you get that default path. This does not include /usr/local/bin for example, where docker lives in my case.
I found the solution here: https://serverfault.com/a/585075:
edit /etc/ssh/sshd_config and make sure it contains PermitUserEnvironment yes (you need to edit this with sudo)
create a file ~/.ssh/environment with the path that you want, in my case:
PATH=/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin
When you now run ssh localhost env you should see a PATH that matches whatever you put in ~/.ssh/environment.
We are setting up a test cloud Openshift Origin which we created using the openshift ansible playbook. We are following the documentation at: https://docs.openshift.com/container-platform/latest/install_config/install/advanced_install.html
We have not done anything special concerning the openshift registry or router.
We are pretty new to this topic and we tried since few tags to bring the openshift registry accessible....
We have 3 hosts:
master (unschedulable)
node-1 which is set to the region 'infra' and has the registry and router services
node-2 (other region).
Here the services running on the default project:
NAME CLUSTER-IP EXTERNAL-IP PORT(S) AGE
docker-registry 172.30.78.66 <none> 5000/TCP 3h
kubernetes 172.30.0.1 <none> 443/TCP,53/UDP,53/TCP 3h
registry-console 172.30.190.63 <none> 9000/TCP 3h
router 172.30.197.135 <none> 80/TCP,443/TCP,1936/TCP 3h
When we SSH directly on the node-1 where the registry and router are running, we can access the registry without problem and we can push some images. Exactly what is here described: docs.openshift.org/latest/install_config/registry/accessing_registry.html
Now we cannot access the registry for other hosts (master or node-2) and we really do not understand how we can make the registry accessible.... We have of course read: docs.openshift.org/latest/install_config/registry/securing_and_exposing_registry.html#access-insecure-registry-by-exposing-route
We have used this command:
oc expose service docker-registry --hostname=<hostname> -n default
The documentation says: You must be able to resolve this name externally via DNS to the router’s IP address.
As the router does not have any EXTERNAL-IP address attached to it, we do not understand how to reach it.
Is there any oc or oadm command for exposing the router through an external-ip address?
Thanks a lot in advance
Emmanuel
Based on your stated configuration I would expect the path to your UI/API for Openshift (openshift.yourdomain.com) to be routed to the same IP as your node-1, because that is where you are running the router.
If that is the case then you would point the hostname you are passing via the command in DNS to the same IP, or as a CNAME to that host.
oc expose service docker-registry --hostname=<hostname> -n default
In a larger setup with dedicated set of load balancer (lb) nodes you might have a specific A record for the set. You could then have the hostname be a CNAME to that record.