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Installation​

wget  https://github.com/flanksource/canary-checker/releases/latest/download/canary-checker_linux_amd64   \
  -O /usr/bin/canary-checker && \
  chmod +x /usr/bin/canary-checker

List all the canaries​

kubectl get canaries -o wide
# NAME                REPLICAS   INTERVAL   STATUS   LAST CHECK   UPTIME 1H        LATENCY 1H   LAST TRANSITIONED  ...
# folder-pass         1          300        Failed   34s          0/35 0%          16ms
# folder-pass-empty   1          300        Passed   34s          37/37 (100.0%)   0ms
# s3-bucket-pass      1          30         Failed   3s           0/358 0%         1s

Scaling​

Canaries can be scaled up or down just like other kubernetes resources. However, scaling to more than one replica is identical to having just one replica. In other words, scaling a canary can be thought of as a mechanism to turn on/off the canary.

1Scaling up (enabling)
kubectl scale --replicas=10 canaries.canaries.flanksource.com folder-pass
# canary.canaries.flanksource.com/folder-pass scaled
kubectl get canaries folder-pass -o wide
# NAME          REPLICAS   INTERVAL   STATUS   LAST CHECK   UPTIME 1H   LATENCY 1H   LAST TRANSITIONED   MESSAGE   ERROR
# folder-pass   1          300        Failed   3m13s        0/35 0%     16ms
2Scale down (disabling)

This effectively stops the canary from running.

kubectl scale --replicas=0 canaries.canaries.flanksource.com folder-pass
# canary.canaries.flanksource.com/folder-pass scaled
kubectl get canaries folder-pass -o wide
# NAME          REPLICAS   INTERVAL   STATUS   LAST CHECK   UPTIME 1H   LATENCY 1H   LAST TRANSITIONED   MESSAGE   ERROR
# folder-pass   0         300        Failed   3m13s        0/35 0%     16ms