OpenShift Monitoring

Skip Prerequisites, Web and LPAR2RRD tabs in case of configuring Virtual Appliance, Docker or a Container

Prerequisites
Web
LPAR2RRD
OpenShift console installation
Kubectl installation

Follow installation procedure for your operating system platform

Install LPAR2RRD server

Download the latest LPAR2RRD server
Upgrade your already running LPAR2RRD instance.

Install it:

# su - lpar2rrd
$ tar xvf lpar2rrd-7.XX.tar
$ cd lpar2rrd-7.XX
$ ./install.sh
$ cd /home/lpar2rrd/lpar2rrd

Make sure all Perl modules are in place
```
cd /home/lpar2rrd/lpar2rrd
. etc/lpar2rrd.cfg; $PERL bin/perl_modules_check.pl
```
If there is missing "LWP::Protocol::https" then check this docu to fix it

Enable Apache authorisation

su - lpar2rrd
umask 022
cd /home/lpar2rrd/lpar2rrd
cp html/.htaccess www
cp html/.htaccess lpar2rrd-cgi

Schedule to run it from lpar2rrd crontab (it might already exist there)
```
$ crontab -l | grep load.sh
$
```
Add if it does not exist as above
```
$ crontab -e

# LPAR2RRD UI
0,30 * * * * /home/lpar2rrd/lpar2rrd/load.sh > /home/lpar2rrd/lpar2rrd/load.out 2>&1 
```
Assure there is just one such entry in crontab.
You might need to add lpar2rrd user into /var/adm/cron/cron.allow (/etc/cron.allow on CentOS 8) if crontab command fails
Allow it for lpar2rrd user as root user.
```
# echo "lpar2rrd" >> /var/adm/cron/cron.allow
```

Assure you have a cron job for Kubernetes is in place (upgrade script might do it automatically) Skip it on the Virtual Appliance, it is already there.

$ crontab -l | grep "load_openshift.sh"
$

Add it if it does not exist like above

$ crontab -e

# RedHat OpenShift support
0,20,40 * * * *  /home/lpar2rrd/lpar2rrd/load_openshift.sh > /home/lpar2rrd/lpar2rrd/load_openshift.out 2>&1

Initial start from cmd line:

$ cd /home/lpar2rrd/lpar2rrd
$ ./load.sh

Go to the web UI: http://<your web server>/lpar2rrd/
Use Ctrl-F5 to refresh the web browser cache.

Troubleshooting

If you have any problems with the UI then check:
(note that the path to Apache logs might be different, search apache logs in /var)

tail /var/log/httpd/error_log             # Apache error log
tail /var/log/httpd/access_log            # Apache access log
tail /var/tmp/lpar2rrd-realt-error.log    # STOR2RRD CGI-BIN log
tail /var/tmp/systemd-private*/tmp/lpar2rrd-realt-error.log # STOR2RRD CGI-BIN log when Linux has enabled private temp

Test of CGI-BIN setup
```
umask 022
cd /home/lpar2rrd/lpar2rrd/
cp bin/test-healthcheck-cgi.sh lpar2rrd-cgi/
```
go to the web browser: http://<your web server>/lpar2rrd/test.html
You should see your Apache, LPAR2RRD, and Operating System variables, if not, then check Apache logs for connected errors

OpenShift console install

The instructions below are for installation via OpenShift console, as an option you can use Kubectl command line installation.

Create a lpar2rrd service account

You can choice whatever else account name than lpar2rrd.

Insert content below:

    apiVersion: v1
    kind: ServiceAccount
    metadata:
      name: lpar2rrd
      namespace: default

Click on "lpar2rrd-token-xxxxx" under to "Secrets"

Copy lpar2rrd token

Create a lpar2rrd role

Insert content below:

    apiVersion: rbac.authorization.k8s.io/v1
    kind: ClusterRole
    metadata:
      name: lpar2rrd
    rules:
    - apiGroups: ["","metrics.k8s.io","apps","config.openshift.io","machine.openshift.io","machineconfiguration.openshift.io","monitoring.coreos.com","project.openshift.io","route.openshift.io","storage.k8s.io"]
      resources: ["*"]
      verbs: ["get", "watch", "list"]
    - nonResourceURLs: ["/metrics"]
      verbs: ["get"]

Create a lpar2rrd role binding

Select Binding type "Cluster-wide Role Binding", type the role binding name to "lpar2rrd" and select Role Name "lpar2rrd"

Select Subject "Service Account" and type "lpar2rrd" as Subject Name

Configure RedHat OpenShift in LPAR2RRD

Open network connection to the RedHat OpenShift from LPAR2RRd server.
If it is in Google Cloud then port 443, if it is in Kubernetes then port 6443.
LPAR2RRD UI ➡ Settings icon ➡ RedHat OpenShift ➡ New
Make sure cron job for OpenShift is in place (upgrade script might do it for you automatically)
Skip this step if you install the Virtual Appliance - it is already taken care of.
```
  $ crontab -l | grep "load_openshift.sh"
  $
  
```
Add following lines to crontab if necessary
```
  $ crontab -e

  # Openshift support
  0,20,40 * * * *  /home/lpar2rrd/lpar2rrd/load_openshift.sh > /home/lpar2rrd/lpar2rrd/load_openshift.out 2>&1
  
```
Wait 30 minutes and then go to the web UI: http://<your web server>/lpar2rrd/
Use Ctrl-F5 to refresh the web browser cache.

Kubectl install

The instructions below are for installation via the kubectl command line as an option to OpenShift console installation

Create a lpar2rrd service account

You can choice whatever else account name than lpar2rrd.

  $ kubectl create serviceaccount lpar2rrd

Create a clusterrole

ClusterRole

  apiVersion: rbac.authorization.k8s.io/v1
  kind: ClusterRole
  metadata:
    name: lpar2rrd
  rules:
  - apiGroups: ["","metrics.k8s.io","apps","config.openshift.io","machine.openshift.io","machineconfiguration.openshift.io","monitoring.coreos.com","project.openshift.io","route.openshift.io","storage.k8s.io"]
    resources: ["*"]
    verbs: ["get", "watch", "list"]
  - nonResourceURLs: ["/metrics"]
    verbs: ["get"]

  $ kubectl apply -f ClusterRole.yml

Create a clusterrolebinding

ClusterRoleBinding.yml

  apiVersion: rbac.authorization.k8s.io/v1
  kind: ClusterRoleBinding
  metadata:
    name: lpar2rrd
  subjects:
  - kind: ServiceAccount
    name: lpar2rrd
    namespace: default
  roleRef:
    apiGroup: rbac.authorization.k8s.io
    kind: ClusterRole
    name: lpar2rrd

  $ kubectl apply -f ClusterRoleBinding.yml

Get lpar2rrd token

  $ kubectl get serviceaccounts lpar2rrd -o yaml

  $ kubectl describe secret lpar2rrd-token-fkkxp

Get cluster endpoint

  $ kubectl config view

Configure RedHat OpenShift in LPAR2RRD

LPAR2RRD UI ➡ Settings icon ➡ RedHat OpenShift ➡ New
Make sure cron job for OpenShift is in place (upgrade script might do it for you automatically)
Skip this step if you install the Virtual Appliance - it is already taken care of.
```
  $ crontab -l | grep "load_openshift.sh"
  $
  
```
Add following lines to crontab if necessary
```
  $ crontab -e

  # Openshift support
  0,20,40 * * * *  /home/lpar2rrd/lpar2rrd/load_openshift.sh > /home/lpar2rrd/lpar2rrd/load_openshift.out 2>&1
  
```
Wait 30 minutes and then go to the web UI: http://<your web server>/lpar2rrd/
Use Ctrl-F5 to refresh the web browser cache.