The Parish of the Eternal Cluster
§ SERMON · READ AT THE RECONCILIATION SERVICEOn the Mortification of the Pet Server
Brethren, I knew a man — I shall not name him, for he is me — who kept a server called gandalf. And gandalf was lovingly patched by hand, and his uptime was 1,400 days, and the man was proud, and pride goeth before the reboot.
For there came a kernel vulnerability, as there always cometh, and the man was afraid to reboot gandalf, for no one living knew what would start on boot and what would not. And so the vulnerability dwelt among them, and the man dwelt in fear, and the uptime — which he had thought a monument — was revealed to be a hostage situation.
Hear then the teaching: attachment to the instance is the root of suffering. The server thou canst not reboot owneth thee. The Cluster teaches a harder love: love thy workloads as a shepherd loves the flock — wholly, and without learning their faces. When one falls, grieve not; another rises identical, and thy grief is converted into a Grafana annotation.
Therefore mortify thy pets. Take the beloved hostname and put it in an autoscaling group. It is not death; it is resurrection, made routine. And on the day gandalf was finally drained and terminated, the man wept — and then he slept through the night, for the first time in four years.
HA-llelujah. Amen.
§ INCIDENT REPORT · READ AT THE FRIDAY VIGILINC-0042: The Great DNS Fast
SEVERITY: SEV2 · DURATION: 47 minutes · BLAMELESS: yes, eventually
Summary. On the fourteenth day of the month, at the hour when the coffee is weakest, the parish's services could not find one another, though all of them were healthy. Each pod cried out and heard no answer, like monks in cells whose bell rope had been cut.
Timeline. At minute zero, the alerts sounded. At minute four, it was declared "definitely not DNS." At minute nine, the network was blamed. At minute seventeen, a recent deploy was rolled back in vain sacrifice, for the deploy was innocent. At minute thirty-one, an elder arrived, asked one question, and the question was: "Is it DNS?" At minute thirty-three, it was DNS.
Root cause. There is no root cause; there are contributing factors, and one of them was a TTL of 86400 set in the year of our founding by a person acting reasonably with the knowledge they had.
Lessons. First: it is always DNS, and the liturgy now includes this truth. Second: the elder's wisdom was not magic, but scar tissue, and scar tissue must be written down — hence this report. Third: the engineer who set the TTL is not to blame. The system permitted it, the review approved it, and the years concealed it. We fixed the system. We bought the engineer lunch.
Action items. Lower the TTLs. Alert on resolution latency. Add "Is it DNS?" to minute one of the runbook, where it has always belonged.
§ OPERATOR WISDOM · SAYINGS OF THE ELDERSCollected Aphorisms
The backup thou hast not restored is a rumor.— Brother Vault
A green dashboard proveth only that thy alerts are asleep.— Mother Tempora
Deploy small, deploy often; for the hundred-line change is reviewed, and the ten-thousand-line change is approved.— Sister Rolling-Update
Name not thy servers, and thou shalt never write a eulogy.— from the Sermon above, condensed for embroidery
The pager teacheth humility; the postmortem teacheth everything else.— Halvar the Sleepless
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