b83ce91f1e
* complete docs refactor * replaces /data references in favor of /var/lib/localkube - fixes #95 * additional layout changes * additional operations layout * readme updates and versioning updates to multinode doc * remove dragons * project goal clarity * remove 'magic' * clean up container image concerns * slight verbiage change * charts not hard coded * small change requested * reconfiguration * updates to minikube docs
67 lines
3.5 KiB
Markdown
67 lines
3.5 KiB
Markdown
# Troubleshooting - Database Deployments
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This guide is to help users debug any general storage issues when deploying Charts in this repository.
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# Galera Cluster
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**CHART:** openstack-helm/mariadb (when `developer-mode: false`)
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MariaDB is a `StatefulSet` (`PetSets` have been retired in Kubernetes v1.5.0). As such, it initiates a 'seed' which is used to deploy MariaDB members via [affinity/anti-affinity](http://kubernetes.io/docs/user-guide/node-selection/) features. Ceph uses this as well. So what you will notice is the following behavior:
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```
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openstack mariadb-0 0/1 Running 0 28s 10.25.49.199 kubenode05
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openstack mariadb-seed-0ckf4 1/1 Running 0 48s 10.25.162.197 kubenode01
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NAMESPACE NAME READY STATUS RESTARTS AGE IP NODE
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openstack mariadb-0 1/1 Running 0 1m 10.25.49.199 kubenode05
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openstack mariadb-1 0/1 Pending 0 0s <none>
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openstack mariadb-1 0/1 Pending 0 0s <none> kubenode04
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openstack mariadb-1 0/1 ContainerCreating 0 0s <none> kubenode04
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openstack mariadb-1 0/1 Running 0 3s 10.25.178.74 kubenode04
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```
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What you're seeing is the output of `kubectl get pods -o wide --all-namespaces`, which is used to monitor the seed host preparing each of the MariaDB/Galera members in order: mariadb-0, then mariadb-1, then mariadb-2. This process can take up to a few minutes, so be patient.
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To test MariaDB, do the following:
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```
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admin@kubenode01:~/projects/openstack-helm$ kubectl exec mariadb-0 -it -n openstack -- mysql -h mariadb.openstack -uroot -ppassword -e 'show databases;'
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+--------------------+
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| Database |
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+--------------------+
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| information_schema |
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| keystone |
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| mysql |
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| performance_schema |
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+--------------------+
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admin@kubenode01:~/projects/openstack-helm$
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```
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Now you can see that MariaDB is loaded, with databases intact! If you're at this point, the rest of the installation is easy. You can run the following to check on Galera:
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```
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admin@kubenode01:~/projects/openstack-helm$ kubectl describe po/mariadb-0 -n openstack
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Name: mariadb-0
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Namespace: openstack
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Node: kubenode05/192.168.3.25
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Start Time: Fri, 23 Dec 2016 16:15:49 -0500
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Labels: app=mariadb
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galera=enabled
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Status: Running
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IP: 10.25.49.199
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Controllers: StatefulSet/mariadb
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...
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...
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...
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FirstSeen LastSeen Count From SubObjectPath Type Reason Message
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--------- -------- ----- ---- ------------- -------- ------ -------
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5s 5s 1 {default-scheduler } Normal Scheduled Successfully assigned mariadb-0 to kubenode05
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3s 3s 1 {kubelet kubenode05} spec.containers{mariadb} Normal Pulling pulling image "quay.io/stackanetes/stackanetes-mariadb:newton"
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2s 2s 1 {kubelet kubenode05} spec.containers{mariadb} Normal Pulled Successfully pulled image "quay.io/stackanetes/stackanetes-mariadb:newton"
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2s 2s 1 {kubelet kubenode05} spec.containers{mariadb} Normal Created Created container with docker id f702bd7c11ef; Security:[seccomp=unconfined]
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2s 2s 1 {kubelet kubenode05} spec.containers{mariadb} Normal Started Started container with docker id f702bd7c11ef
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```
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So you can see that galera is enabled.
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