inspectr

inspectr

this is a binary that, when run in a k8s cluster, gets details of pods in the same cluster (via the k8s master/API), and alerts if certain conditions are met.

currently the only condition that's ever met is "are there any upgrades to the image being run in pod X?"

result grouping

results are unique by cluster/pod-name/container-name/namespace/image

results are stored (and appear in alerts) in a map where the key is cluster:image:pod-name:cluster-name

running/alerting frequency

the binary outputs a full set of results daily or weekly, and new results whenever they're discovered.

the frequency at which the full resultset is outputted can be configered by using the environment variable:

• INSPECTR_SCHEDULE

e.g. "1430" = 14:30 daily

"tuesday|1430" = 14:30 every tuesday

weekday is not case-sensitive

defaults to "1000" (daily)

alert cache

to prevent noise, the binary keeps a cache of the clusters/images that an alert has been produced for

if a cluster/image appears in the cache, it won't get alerted on again until the 'scheduled alert window'

when the binary first runs, the cache is empty, so essentially you'll get a full result alert every time a pod starts/restarts

slack alerts

the binary needs to know the webhook id that you want the alerts going to

it looks for this id in the environment variables:

• INSPECTR_SLACK_WEBHOOK_ID

this id is the string that comes after "https://hooks.slack.com/services/" in your webhook URL

if that's not set, the binary still runs, you just (obviously) won't see any alerts in your Slack channel. Inspectr results are still logged via glog.

jira

the inspectr binary can create a JIRA detailing the image upgrades it finds, or update existing JIRAs that may have been created on previous runs (it will only update if there are any additional new versions found, though).

to enable this functionality, you'll need to set 2 environment variables:

• INSPECTR_JIRA_URL
  • URL of your JIRA instance
• INSPECTR_JIRA_PARAMS
  • Usage: user|pass|project|issueType|otherFieldKey:otherFieldValue,otherFieldKey:otherFieldValue...
  • mandatory: user, pass, project, issueType
  • oauth2 hasn't been integrated yet..
  • optional (as your JIRA instance may require them): otherFieldKey:otherFieldValue
  • otherFieldKey should equal the field names as they appear in your JIRA UI
  • note the sepratators, "|" and "," and ":"

it's recommended to:

• use kubernetes secrets for your environment variables (note if you've got any whitespaces in your otherFieldKeys, you'll have to wrap the environment variable in quotes when you issue the kubectl create command)
• create a new JIRA user for use by inspectr, that has limited access to a single project
• use https
• [obvious advice about passwords]