omc: OpenShift Must-Gather Client
omc tool has been created to allow engineers to inspect resources from a must-gather in the same way as they are retrieved with the oc command.
Installation
Download the latest binary
OS=Linux # or Darwin
curl -sL https://github.com/gmeghnag/omc/releases/latest/download/omc_${OS}_x86_64.tar.gz| tar xzf - omc
chmod +x ./omc
Build from source
$ git clone https://github.com/gmeghnag/omc.git
$ cd omc/
$ go install
Upgrade
Starting with v2.1.0 it's possible to upgrade the tool by running omc upgrade --to=<version>
Usage
Point it to an extracted must-gather:
$ omc use </path/to/must-gather/>
Use it like oc:
$ omc get clusterversion
$ omc get pods -o wide -l app=etcd -n openshift-etcd
Examples
- Retrieving master nodes by label:
$ omc get node -l node-role.kubernetes.io/master= -o name
node/ip-10-0-132-49.eu-central-1.compute.internal
node/ip-10-0-178-163.eu-central-1.compute.internal
node/ip-10-0-202-187.eu-central-1.compute.internal
- Retrieving etcd pod name from node name:
$ omc get pod -l app=etcd -o jsonpath="{.items[?(@.spec.nodeName=='ip-10-0-132-49.eu-central-1.compute.internal')].metadata.name}"
etcd-ip-10-0-132-49.eu-central-1.compute.internal
- Check the ETCD status:
$ omc etcd status
+---------------------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+
| ENDPOINT | ID | VERSION | DB SIZE | IS LEADER | IS LEARNER | RAFT TERM | RAFT INDEX | RAFT APPLIED INDEX | ERRORS |
+---------------------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+
| https://10.0.202.187:2379 | 9f38784f0a8ae43 | 3.4.14 | 147 MB | false | false | 24 | 5682273 | 5682273 | |
| https://10.0.132.49:2379 | 83b81478d4b02409 | 3.4.14 | 148 MB | false | false | 24 | 5682423 | 5682423 | |
| https://10.0.178.163:2379 | dd17c7ce8efc0349 | 3.4.14 | 147 MB | true | false | 24 | 5682537 | 5682537 | |
+---------------------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+
- Retrive the prometheus alerts in
firingorpendingstate:
$ omc alert rule -s firing,pending -o wide
GROUP RULE STATE AGE ALERTS ACTIVE SINCE
cluster-version UpdateAvailable firing 11s 1 27 Jan 22 14:32 UTC
logging_fluentd.alerts FluentdQueueLengthIncreasing pending 27s 1 29 Jan 22 11:48 UTC
general.rules Watchdog firing 11s 1 25 Jan 22 08:50 UTC
openshift-kubernetes.rules AlertmanagerReceiversNotConfigured firing 5s 1 25 Jan 22 08:51 UTC
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