Go? Bash! Meet the Shell-operator

by flant

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Go? Bash! Meet the Shell-operator Go? Bash! Meet the Shell-operator Andrey Klimentyev & Dmitry Stolyarov

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Go? Bash! Meet the Shell-operator Kubernetes API Basics

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Go? Bash! Meet the Shell-operator backend-689bc4d4d5-rv4rq.yaml Deployment ReplicaSet Pod GET backend.yaml frontend.yaml …. .yaml backend-689bc4d4d5.yaml backend-cf789746c.yaml frontend-66544df5ff.yaml frontend-7b5f97db64.yaml frontend-65d68fd554.yaml …. .yaml backend-cf789746c-qqbmn.yaml backend-cf789746c-l9sfr.yaml frontend-66544df5ff-dtnhn.yaml frontend-65d68fd554-twl85.yaml …. .yaml Simple HTTP API

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Go? Bash! Meet the Shell-operator backend-689bc4d4d5-rv4rq.yaml Deployment ReplicaSet Pod PUT backend.yaml frontend.yaml …. .yaml backend-689bc4d4d5.yaml backend-cf789746c.yaml frontend-66544df5ff.yaml frontend-7b5f97db64.yaml frontend-65d68fd554.yaml …. .yaml backend-cf789746c-qqbmn.yaml backend-cf789746c-l9sfr.yaml frontend-66544df5ff-dtnhn.yaml frontend-65d68fd554-twl85.yaml …. .yaml GET Simple HTTP API

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Go? Bash! Meet the Shell-operator okay backend-689bc4d4d5-rv4rq.yaml Deployment ReplicaSet Pod PUT backend.yaml frontend.yaml …. .yaml backend-689bc4d4d5.yaml backend-cf789746c.yaml frontend-66544df5ff.yaml frontend-7b5f97db64.yaml frontend-65d68fd554.yaml …. .yaml backend-cf789746c-qqbmn.yaml backend-cf789746c-l9sfr.yaml frontend-66544df5ff-dtnhn.yaml frontend-65d68fd554-twl85.yaml …. .yaml GET Simple HTTP API

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Go? Bash! Meet the Shell-operator NO! backend-689bc4d4d5-rv4rq.yaml Deployment ReplicaSet Pod PUT backend.yaml frontend.yaml …. .yaml backend-689bc4d4d5.yaml backend-cf789746c.yaml frontend-66544df5ff.yaml frontend-7b5f97db64.yaml frontend-65d68fd554.yaml …. .yaml backend-cf789746c-qqbmn.yaml backend-cf789746c-l9sfr.yaml frontend-66544df5ff-dtnhn.yaml frontend-65d68fd554-twl85.yaml …. .yaml GET Simple HTTP API

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Go? Bash! Meet the Shell-operator backend-689bc4d4d5-rv4rq.yaml Deployment ReplicaSet Pod WATCH backend.yaml frontend.yaml …. .yaml backend-689bc4d4d5.yaml backend-cf789746c.yaml frontend-66544df5ff.yaml frontend-7b5f97db64.yaml frontend-65d68fd554.yaml …. .yaml backend-cf789746c-qqbmn.yaml backend-cf789746c-l9sfr.yaml frontend-66544df5ff-dtnhn.yaml frontend-65d68fd554-twl85.yaml …. .yaml GET PUT Simple HTTP API

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Go? Bash! Meet the Shell-operator GET PUT backend-cf789746c-qqbmn.yaml backend-cf789746c-l9sfr.yaml frontend-66544df5ff-dtnhn.yaml frontend-65d68fd554-twl85.yaml …. .yaml backend-689bc4d4d5-rv4rq.yaml Deployment ReplicaSet Pod WATCH backend.yaml frontend.yaml …. .yaml backend-689bc4d4d5.yaml backend-cf789746c.yaml frontend-66544df5ff.yaml frontend-7b5f97db64.yaml frontend-65d68fd554.yaml …. .yaml Simple HTTP API

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Go? Bash! Meet the Shell-operator backend-689bc4d4d5-rv4rq.yaml Deployment ReplicaSet Pod GET PUT WATCH backend.yaml frontend.yaml …. .yaml backend-689bc4d4d5.yaml backend-cf789746c.yaml frontend-66544df5ff.yaml frontend-7b5f97db64.yaml frontend-65d68fd554.yaml …. .yaml backend-cf789746c-qqbmn.yaml backend-cf789746c-l9sfr.yaml frontend-66544df5ff-dtnhn.yaml frontend-65d68fd554-twl85.yaml …. .yaml Simple HTTP API

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Go? Bash! Meet the Shell-operator backend-689bc4d4d5-rv4rq.yaml Deployment ReplicaSet Pod backend.yaml frontend.yaml …. .yaml backend-689bc4d4d5.yaml backend-cf789746c.yaml frontend-66544df5ff.yaml frontend-7b5f97db64.yaml frontend-65d68fd554.yaml …. .yaml backend-cf789746c-qqbmn.yaml backend-cf789746c-l9sfr.yaml frontend-66544df5ff-dtnhn.yaml frontend-65d68fd554-twl85.yaml …. .yaml External world type #1 type #2

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Go? Bash! Meet the Shell-operator User backend.yaml Deployment

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Go? Bash! Meet the Shell-operator User Deployment Controller backend.yaml Deployment

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Go? Bash! Meet the Shell-operator User Deployment Controller backend.yaml backend-689bc4d4d5.yaml Deployment ReplicaSet

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Go? Bash! Meet the Shell-operator Deployment Controller User backend.yaml backend-689bc4d4d5.yaml Deployment ReplicaSet ReplicaSet Controller

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Go? Bash! Meet the Shell-operator Deployment Controller User backend-689bc4d4d5-rv4rq.yaml backend-689bc4d4d5-qqbmn.yaml backend.yaml backend-689bc4d4d5.yaml Deployment ReplicaSet Pod ReplicaSet Controller

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Go? Bash! Meet the Shell-operator ReplicaSet Controller Deployment Controller User Scheduler backend-689bc4d4d5-rv4rq.yaml backend-689bc4d4d5-qqbmn.yaml backend.yaml backend-689bc4d4d5.yaml Deployment ReplicaSet Pod

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Go? Bash! Meet the Shell-operator ReplicaSet Controller Deployment Controller User Scheduler node-x node-y backend-689bc4d4d5-rv4rq.yaml backend-689bc4d4d5-qqbmn.yaml backend.yaml backend-689bc4d4d5.yaml Deployment ReplicaSet Pod

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Go? Bash! Meet the Shell-operator ReplicaSet Controller Scheduler node-x node-y Deployment Controller User backend-689bc4d4d5-rv4rq.yaml backend-689bc4d4d5-qqbmn.yaml backend.yaml backend-689bc4d4d5.yaml Deployment ReplicaSet Pod Kubelet Kubelet

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Go? Bash! Meet the Shell-operator Kubelet Kubelet Docker Docker Scheduler node-x node-y Deployment Controller User backend-689bc4d4d5-rv4rq.yaml backend-689bc4d4d5-qqbmn.yaml backend.yaml backend-689bc4d4d5.yaml Deployment ReplicaSet Pod ReplicaSet Controller

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Go? Bash! Meet the Shell-operator User Kubelet Kubelet Docker Docker ReplicaSet Controller Scheduler node-x node-y Deployment Controller backend-689bc4d4d5-rv4rq.yaml backend-689bc4d4d5-qqbmn.yaml backend.yaml backend-689bc4d4d5.yaml Deployment ReplicaSet Pod

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Go? Bash! Meet the Shell-operator Kubelet Kubelet Docker Docker ReplicaSet Controller Scheduler node-x node-y Deployment Controller backend-689bc4d4d5-rv4rq.yaml backend-689bc4d4d5-qqbmn.yaml backend.yaml backend-689bc4d4d5.yaml Deployment ReplicaSet Pod User

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Go? Bash! Meet the Shell-operator default foo qux quux garply mysecret secret:yes secret:yes secret:yes kubernetes

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Go? Bash! Meet the Shell-operator kubernetes default foo qux quux garply mysecret mysecret mysecret secret:yes secret:yes mysecret secret:yes

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Go? Bash! Meet the Shell-operator kubernetes default foo qux quux quuz garply waldo fred mysecret mysecret mysecret secret:yes secret:yes mysecret secret:yes

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Go? Bash! Meet the Shell-operator kubernetes default foo qux quux quuz garply waldo fred mysecret mysecret mysecret secret:yes secret:yes secret:yes mysecret secret:yes

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Go? Bash! Meet the Shell-operator kubernetes default foo qux quux quuz garply waldo fred mysecret mysecret mysecret secret:yes secret:yes mysecret secret:yes mysecret secret:yes

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Go? Bash! Meet the Shell-operator kubernetes default foo qux quux quuz garply waldo fred mysecret mysecret mysecret secret:yes secret:yes mysecret secret:yes mysecret secret:yes

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Go? Bash! Meet the Shell-operator kubernetes default foo qux quux quuz garply waldo fred mysecret mysecret mysecret secret:yes secret:yes mysecret secret:yes mysecret

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Go? Bash! Meet the Shell-operator kubernetes default foo qux quux quuz garply waldo fred mysecret mysecret mysecret secret:yes secret:yes mysecret secret:yes mysecret

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Go? Bash! Meet the Shell-operator kubernetes default foo qux quux quuz garply waldo fred mysecret mysecret mysecret secret:yes secret:yes mysecret secret:yes

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Go? Bash! Meet the Shell-operator kubernetes default foo qux quux quuz garply waldo fred mysecret mysecret mysecret secret:yes secret:yes mysecret secret:yes

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Go? Bash! Meet the Shell-operator kubernetes default foo qux quux quuz garply waldo fred mysecret mysecret mysecret mysecret secret:yes secret:yes secret:yes

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Go? Bash! Meet the Shell-operator kubernetes default foo qux quux quuz garply waldo fred mysecret mysecret mysecret secret:yes secret:yes mysecret secret:yes

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Go? Bash! Meet the Shell-operator kubernetes default foo qux quux quuz garply waldo fred mysecret mysecret mysecret secret:yes secret:yes mysecret secret:yes

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Go? Bash! Meet the Shell-operator kubernetes default foo qux quux quuz garply waldo fred mysecret mysecret secret:yes secret:yes mysecret secret:yes

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Go? Bash! Meet the Shell-operator kubernetes default foo qux quux quuz garply waldo fred mysecret mysecret mysecret secret:yes secret:yes mysecret secret:yes

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Go? Bash! Meet the Shell-operator shell-operator

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Go? Bash! Meet the Shell-operator kubernetes #! /hooks/ foo.sh bar.py baz.rb

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Go? Bash! Meet the Shell-operator kubernetes #! #! #! #!

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Go? Bash! Meet the Shell-operator kubernetes Kubernetes API #! #! #! #!

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Go? Bash! Meet the Shell-operator kubernetes Kubernetes API #! #! #! #!

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Go? Bash! Meet the Shell-operator kubernetes Kubernetes API #! #! #! #!

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Go? Bash! Meet the Shell-operator Conﬁguration Hook is executed with --config arg. 1 Hook should output YAML with its conﬁguration. 2 Normal execution Hook is executed with no args. 1 Hook receives binding context. 2 once, on startup many times, on events

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Go? Bash! Meet the Shell-operator #!/bin/bash source /shell_lib.sh function __config__() { } function __main__() { } hook::run "$@"

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Go? Bash! Meet the Shell-operator #!/bin/bash source /shell_lib.sh function __config__() { cat << EOF configVersion: v1 # BINDING CONFIGURATION EOF } function __main__() { #THE LOGIC } hook::run "$@" cat << EOF configVersion: v1 # BINDING CONFIGURATION EOF

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Go? Bash! Meet the Shell-operator #!/bin/bash source /shell_lib.sh function __config__() { cat << EOF configVersion: v1 # BINDING CONFIGURATION EOF } function __main__() { #THE LOGIC } hook::run "$@"

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Go? Bash! Meet the Shell-operator default foo qux quux quuz garply waldo fred mysecret mysecret mysecret mysecret secret:yes secret:yes secret:yes kubernetes

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Go? Bash! Meet the Shell-operator kubernetes default foo qux quux quuz garply waldo fred mysecret mysecret mysecret mysecret secret:yes secret:yes secret:yes

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Go? Bash! Meet the Shell-operator kubernetes default foo qux quux quuz garply waldo fred mysecret mysecret mysecret mysecret secret:yes secret:yes secret:yes

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Go? Bash! Meet the Shell-operator kubernetes default foo qux quux quuz garply waldo fred mysecret mysecret mysecret mysecret secret:yes secret:yes secret:yes

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Go? Bash! Meet the Shell-operator kubernetes default foo qux quux quuz garply waldo fred mysecret mysecret mysecret mysecret secret:yes secret:yes secret:yes

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Go? Bash! Meet the Shell-operator #!/bin/bash source /shell_lib.sh function __config__() { cat << EOF configVersion: v1 # BINDING CONFIGURATION EOF } function __main__() { } hook::run "$@" cat << EOF configVersion: v1 # BINDING CONFIGURATION EOF Binding conﬁguration

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Go? Bash! Meet the Shell-operator function __config__() { } cat << EOF configVersion: v1 # BINDING CONFIGURATION EOF Binding conﬁguration

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Go? Bash! Meet the Shell-operator function __config__() { } cat << EOF configVersion: v1 kubernetes: - name: src_secret apiVersion: v1 kind: Secret nameSelector: matchNames: - mysecret namespace: nameSelector: matchNames: ["default"] group: main EOF Binding conﬁguration

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Go? Bash! Meet the Shell-operator snapshots: src_secret: - object: apiVersion: v1 kind: Secret metadata: { … } data: { … } function __config__() { } cat << EOF configVersion: v1 kubernetes: - name: src_secret apiVersion: v1 kind: Secret nameSelector: matchNames: - mysecret namespace: nameSelector: matchNames: ["default"] group: main EOF Binding context Binding conﬁguration

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Go? Bash! Meet the Shell-operator kubernetes default foo qux quux quuz garply waldo fred mysecret mysecret mysecret secret:yes secret:yes mysecret secret:yes

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Go? Bash! Meet the Shell-operator - name: namespaces group: main apiVersion: v1 kind: Namespace jqFilter: | { namespace: .metadata.name, hasLabel: ( .metadata.labels // {} | contains({"secret": "yes"}) ) } group: main keepFullObjectsInMemory: false Binding conﬁguration

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Go? Bash! Meet the Shell-operator # kubectl get ns foo -o json | jq '{ > "name": .metadata.name, > "hasLabel": ( .metadata.labels // {} | contains({"secret": "yes"}) ) > }' { "name": "kube-system", "hasLabel": true }

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Go? Bash! Meet the Shell-operator snapshots: namespaces: - filterResult: namespace: foo hasLabel: true - filterResult: namespace: bar hasLabel: false - filterResult: namespace: baz hasLabel: false - filterResult: namespace: quz hasLabel: false - ... - name: namespaces group: main apiVersion: v1 kind: Namespace jqFilter: | { namespace: .metadata.name, hasLabel: ( .metadata.labels // {} | contains({"secret": "yes"}) ) } group: main keepFullObjectsInMemory: false Binding context Binding conﬁguration

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Go? Bash! Meet the Shell-operator snapshots: namespaces: - filterResult: namespace: foo hasLabel: true - filterResult: namespace: bar hasLabel: false - filterResult: namespace: baz hasLabel: false - ... - name: namespaces group: main apiVersion: v1 kind: Namespace jqFilter: | { namespace: .metadata.name, hasLabel: ( .metadata.labels // {} | contains({"secret": "yes"}) ) } group: main keepFullObjectsInMemory: false Binding context Binding conﬁguration

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Go? Bash! Meet the Shell-operator snapshots: namespaces: - filterResult: namespace: foo hasLabel: true object: apiVersion: v1 kind: Namespace metadata: { … } - filterResult: namespace: bar hasLabel: false - filterResult: namespace: baz hasLabel: false - ... - name: namespaces group: main apiVersion: v1 kind: Namespace jqFilter: | { namespace: .metadata.name, hasLabel: ( .metadata.labels // {} | contains({"secret": "yes"}) ) } group: main keepFullObjectsInMemory: false Binding context Binding conﬁguration

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Go? Bash! Meet the Shell-operator kubernetes default foo qux quux quuz garply waldo fred mysecret mysecret mysecret secret:yes secret:yes mysecret secret:yes

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Go? Bash! Meet the Shell-operator - name: dst_secrets apiVersion: v1 kind: Secret labelSelector: matchLabels: managed-secret: "yes" jqFilter: | { "namespace": .metadata.namespace, "resourceVersion": .metadata.annotations.resourceVersion } group: main keepFullObjectsInMemory: false Binding conﬁguration

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Go? Bash! Meet the Shell-operator snapshots: dst_secrets: - filterResult: namespace: foo resourceVersion: 123456 - name: dst_secrets apiVersion: v1 kind: Secret labelSelector: matchLabels: managed-secret: "yes" jqFilter: | { "namespace": .metadata.namespace, "resourceVersion": .metadata.annotations.resourceVersion } group: main keepFullObjectsInMemory: false Binding context Binding conﬁguration

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Go? Bash! Meet the Shell-operator namespaces: - filterResult: namespace: foo hasLabel: true - filterResult: namespace: bar hasLabel: false - filterResult: namespace: baz hasLabel: false - filterResult: namespace: quz hasLabel: false - ... dst_secrets: - filterResult: namespace: foo resourceVersion: 123456 - filterResult: namespace: corge resourceVersion: 123456 - filterResult: namespace: xyzzy resourceVersion: 123456 src_secret: - object: apiVersion: v1 kind: Secret metadata: { … } spec: { … }

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Go? Bash! Meet the Shell-operator Is in sync with ? do nothing yes kubectl create or replace no dst_secrets: - filterResult: namespace: foo resourceVersion: 123456 - filterResult: namespace: corge resourceVersion: 123456 - filterResult: namespace: xyzzy resourceVersion: 123456 src_secret: - object: apiVersion: v1 kind: Secret metadata: { … } spec: { … } namespaces: - filterResult: namespace: foo hasLabel: true - filterResult: namespace: bar hasLabel: false - filterResult: namespace: baz hasLabel: false - filterResult: namespace: quz hasLabel: false - ...

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Go? Bash! Meet the Shell-operator namespaces: - filterResult: namespace: foo hasLabel: true - filterResult: namespace: bar hasLabel: false - filterResult: namespace: baz hasLabel: false - filterResult: namespace: quz hasLabel: false - ... Does exist? kubectl delete yes do nothing no dst_secrets: - filterResult: namespace: foo resourceVersion: 123456 - filterResult: namespace: corge resourceVersion: 123456 - filterResult: namespace: xyzzy resourceVersion: 123456 src_secret: - object: apiVersion: v1 kind: Secret metadata: { … } spec: { … }

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Go? Bash! Meet the Shell-operator function __main__() { }

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Go? Bash! Meet the Shell-operator function __main__() { for i in $(seq 0 "$(context::jq -r '(.snapshots.namespaces | length) - 1')"); do ns_name="$(context::jq -r '.snapshots.namespaces['"$i"'].filterResult.name')" if context::jq -e '.snapshots.namespaces['"$i"'].filterResult.hasLabel'; then sync_secret "$ns_name" else delete_secret "$ns_name" fi done }

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Go? Bash! Meet the Shell-operator function delete_secret() { if context::jq -e --arg ns "$1" 'select(.snapshots…namespace == $ns)' ; then kubectl -n "$1" delete secret "mysecret" fi }

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Go? Bash! Meet the Shell-operator function delete_secret() { if context::jq -e --arg ns "$1" 'select(.snapshots…namespace == $ns)' ; then kubectl -n "$1" delete secret "mysecret" fi }

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Go? Bash! Meet the Shell-operator function delete_secret() { if context::jq -e --arg ns "$1" 'select(.snapshots…namespace == $ns)' ; then kubectl -n "$1" delete secret "mysecret" fi }

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Go? Bash! Meet the Shell-operator function delete_secret() { if context::jq -e --arg ns "$1" 'select(.snapshots…namespace == $ns)' ; then kubectl -n "$1" delete secret "mysecret" fi } function sync_secret() { src_resource_version="$(…)" dst_secret_resource_version="$(…)" if [ "$src_resource_version" != "$dst_resource_version" ] ; then new_secret="$(context::jq -r '.snapshots.src_secret[0].object | …)" kubectl -n "$1" replace -f <(echo "$new_secret") || kubectl -n "$1" create -f <(echo "$new_secret") fi }

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Go? Bash! Meet the Shell-operator 35 lines in yaml configVersion: v1 kubernetes: - name: src_secret apiVersion: v1 kind: Secret nameSelector: matchNames: - mysecret namespace: nameSelector: matchNames: ["default"] group: main - name: dst_secrets apiVersion: v1 kind: Secret labelSelector: matchLabels: managed-secret: "yes" jqFilter: | { "namespace": .metadata.namespace, "resourceVersion": .annotations."resourceVersion" } group: main keepFullObjectsInMemory: false - name: namespaces group: main apiVersion: v1 kind: Namespace jqFilter: | { name: .metadata.name, hasLabel: (.metadata.labels // {} | contains({"secret": "yes"})) } group: main keepFullObjectsInMemory: false 20 lines in bash #! + + shell-operator function __main__() { for i in $(seq 0 "$(context::jq -r '(.snapshots.namespaces | length) - 1')"); do ns_name="$(context::jq -r '.snapshots.namespaces['"$i"'].filterResult.name')" if context::jq -e '.snapshots.namespaces['"$i"'].filterResult.hasLabel'; then sync_secret "$ns_name" else delete_secret "$ns_name" fi done } function delete_secret() { if context::jq -e --arg ns "$1" 'select(.snapshots…namespace == $ns)' ; then kubectl -n "$1" delete secret "mysecret" fi } function sync_secret() { src_resource_version="$(…)" dst_secret_resource_version="$(…)" if [ "$src_resource_version" != "$dst_resource_version" ] ; then new_secret="$(context::jq -r '.snapshots.src_secret[0].object | …)" kubectl -n "$1" replace -f <(echo "$new_secret") || kubectl -n "$1" create -f <(echo "$new_secret") fi } kubernetes default foo qux quux quuz garply waldo fred mysecret mysecret mysecret mysecret secret:yes secret:yes secret:yes

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Go? Bash! Meet the Shell-operator kubernetes

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Go? Bash! Meet the Shell-operator kubernetes Config Map

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Go? Bash! Meet the Shell-operator apiVersion: apps/v1 kind: Deployment metadata: name: foo spec: template: spec: containers: - name: bar image: registry.example.com/myapp:v1.0.0 env: - name: DB_USER valueFrom: configMapKeyRef: name: foo key: db_user - name: DB_PASSWORD valueFrom: configMapKeyRef: name: foo key: db_password ENV

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Go? Bash! Meet the Shell-operator apiVersion: apps/v1 kind: Deployment metadata: name: foo spec: template: spec: containers: - name: bar image: registry.example.com/myapp:v1.0.0 volumeMounts: - mountPath: /etc/config name: config volumes: - name: config configMap: name: foo items: - key: config.yaml path: config.yaml Mount

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Go? Bash! Meet the Shell-operator Config Map kubernetes

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Go? Bash! Meet the Shell-operator kubernetes Config Map v.1

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Go? Bash! Meet the Shell-operator kubernetes Config Map v.1 v.1 v.1 v.1

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Go? Bash! Meet the Shell-operator kubernetes Config Map v.2 v.1 v.1 v.1

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Go? Bash! Meet the Shell-operator apiVersion: apps/v1 kind: Deployment metadata: name: foo spec: template: metadata: annotations: config/checksum: b4d6b660fffb798dcaca5b8a spec: containers: - name: bar image: registry.example.com/myapp:v1.0.0 env: - name: DB_USER valueFrom: configMapKeyRef: name: foo key: db_user - name: DB_PASSWORD valueFrom: configMapKeyRef: name: foo key: db_password

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Go? Bash! Meet the Shell-operator kubernetes Config Map

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Go? Bash! Meet the Shell-operator kubernetes Config Map b4d6b6

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Go? Bash! Meet the Shell-operator kubernetes Config Map b4d6b6 b4d6b6 b4d6b6 b4d6b6

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Go? Bash! Meet the Shell-operator kubernetes Config Map b4d6b6 b4d6b6 b4d6b6 b4d6b6

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Go? Bash! Meet the Shell-operator kubernetes Config Map b4d6b6 b4d6b6 b4d6b6 b4d6b6

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Go? Bash! Meet the Shell-operator kubernetes Config Map b4d6b6 b4d6b6 b4d6b6 b4d6b6

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Go? Bash! Meet the Shell-operator kubernetes #! Config Map b4d6b6 b4d6b6 b4d6b6 b4d6b6

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Go? Bash! Meet the Shell-operator kubernetes #! Config Map b4d6b6 b4d6b6 b4d6b6 b4d6b6

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Go? Bash! Meet the Shell-operator kubernetes #! Config Map b4d6b6 b4d6b6 b4d6b6 b4d6b6

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Go? Bash! Meet the Shell-operator backend.yaml Deployment backend-689bc4d4d5.yaml ReplicaSet backend-689bc4d4d5-rv4rq.yaml Pod backend-cf789746c-qqbmn.yaml backend-cf789746c-l9sfr.yaml

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Go? Bash! Meet the Shell-operator backend.yaml Deployment backend-689bc4d4d5.yaml ReplicaSet backend-689bc4d4d5-rv4rq.yaml Pod backend-cf789746c-qqbmn.yaml backend-cf789746c-l9sfr.yaml a-users.yaml MysqlDatabase a-archive.yaml Custom Resource Deﬁnitions

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Go? Bash! Meet the Shell-operator apiVersion: example.com/v1alpha1 kind: MysqlDatabase metadata: name: foo namespace: bar

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Go? Bash! Meet the Shell-operator kubernetes foo main bar main baz main qux main another #!

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Go? Bash! Meet the Shell-operator kubernetes foo main bar main baz main qux main another #! server

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Go? Bash! Meet the Shell-operator kubernetes server foo main bar main baz main qux main another #! foo.main bar.main baz.main baz.another qux.main

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Go? Bash! Meet the Shell-operator configVersion: v1 kubernetes: - name: nodes apiVersion: v1 kind: Node jqFilter: | { name: .metadata.name, ip: ( .status.addresses[] | select(.type == "InternalIP") | .address ) } group: main keepFullObjectsInMemory: false

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Go? Bash! Meet the Shell-operator function __main__() { for i in $(seq 0 "$(context::jq -r '(.snapshots.nodes | length) - 1')"); do node_name="$(context::jq -r '.snapshots.nodes['"$i"'].filterResult.name')" node_ip="$(context::jq -r '.snapshots.nodes['"$i"'].filterResult.ip')" packets_lost=0 if ping -c 1 $node_ip -t 1 ; then packets_lost=1 fi cat <<-END { "name": "node_packets_lost", "add": $packets_lost, "labels": { "node": $node_name, } } END >> $METRICS_PATH done }

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Go? Bash! Meet the Shell-operator #! + shell-operator addon-operator = #! hooks + events + helm = #! hooks + events

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Go? Bash! Meet the Shell-operator Thank you! Like? Try! And don’t forget to star on GitHub Dmitry Stolyarov CTO & Co-founder twitter.com/dmistol linkedin.com/in/distol Flant Running your production 24×7×365 medium.com/flant-com youtube.com/c/flant_com flant.com #! + shell-operator github.com/flant/shell-operator addon-operator github.com/flant/addon-operator Andrey Klimentyev Solutions Engineer