Etcd helper

A helper tool for getting OpenShift/Kubernetes data directly from Etcd.

How to build

$ go build .

Basic Usage

This requires setting the following flags:

• -key - points to master.etcd-client.key
• -cert - points to master.etcd-client.crt
• -cacert - points to ca.crt

Once these are set properly, one can invoke the following actions:

• ls - list all keys starting with prefix
• get - get the specific value of a key
• put - put the specific value of a key
• dump - dump the entire contents of the etcd

Sample Usage

Get etcd information.

    export ETCDCTL_CACERT="/etc/kubernetes/static-pod-resources/etcd-certs/configmaps/etcd-serving-ca/ca-bundle.crt"
    export ETCDCTL_KEY="/etc/kubernetes/static-pod-certs/resources/etcd-certs/secrets/etcd-all-certs/etcd-peer-mmcn.openlab.red.key"
    export ETCDCTL_KEY="/etc/kubernetes/static-pod-resources/etcd-certs/secrets/etcd-all-certs/etcd-peer-mmcn.openlab.red.key"
    export ETCDCTL_CERT="/etc/kubernetes/static-pod-resources/etcd-certs/secrets/etcd-all-certs/etcd-peer-mmcn.openlab.red.crt"

List all keys starting with /openshift.io:

./etcdhelper -key $ETCDCTL_KEY -cert $ETCDCTL_CERT -cacert $ETCDCTL_CACERT ls /openshift.io

Get JSON-representation of /kubernetes.io/clusterrolebindings/system-bootstrap-node-bootstrapper:

./etcdhelper -key $ETCDCTL_KEY -cert $ETCDCTL_CERT -cacert $ETCDCTL_CACERT get /kubernetes.io/clusterrolebindings/system-bootstrap-node-bootstrapper

Put value (JSON or YAML) to /kubernetes.io/clusterrolebindings/system-bootstrap-node-bootstrapper:

./etcdhelper -key $ETCDCTL_KEY -cert $ETCDCTL_CERT -cacert $ETCDCTL_CACERT put /kubernetes.io/clusterrolebindings/system-bootstrap-node-bootstrapper '<your value>'

Dump the contents of etcd to stdout:

./etcdhelper -key $ETCDCTL_KEY -cert $ETCDCTL_CERT -cacert $ETCDCTL_CACERT dump

Reference

• https://github.com/openshift/origin/tree/master/tools/etcdhelper