forked from hswaw/hscloud
748 lines
21 KiB
Jsonnet
748 lines
21 KiB
Jsonnet
// Generic library of Kubernetes objects (https://github.com/bitnami-labs/kube-libsonnet)
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//
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// Objects in this file follow the regular Kubernetes API object
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// schema with two exceptions:
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//
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// ## Optional helpers
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//
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// A few objects have defaults or additional "helper" hidden
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// (double-colon) fields that will help with common situations. For
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// example, `Service.target_pod` generates suitable `selector` and
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// `ports` blocks for the common case of a single-pod/single-port
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// service. If for some reason you don't want the helper, just
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// provide explicit values for the regular Kubernetes fields that the
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// helper *would* have generated, and the helper logic will be
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// ignored.
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//
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// ## The Underscore Convention:
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//
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// Various constructs in the Kubernetes API use JSON arrays to
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// represent unordered sets or named key/value maps. This is
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// particularly annoying with jsonnet since we want to use jsonnet's
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// powerful object merge operation with these constructs.
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//
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// To combat this, this library attempts to provide more "jsonnet
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// native" variants of these arrays in alternative hidden fields that
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// end with an underscore. For example, the `env_` block in
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// `Container`:
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// ```
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// kube.Container("foo") {
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// env_: { FOO: "bar" },
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// }
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// ```
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// ... produces the expected `container.env` JSON array:
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// ```
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// {
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// "env": [
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// { "name": "FOO", "value": "bar" }
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// ]
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// }
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// ```
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//
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// If you are confused by the underscore versions, or don't want them
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// in your situation then just ignore them and set the regular
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// non-underscore field as usual.
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//
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//
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// ## TODO
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//
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// TODO: Expand this to include all API objects.
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//
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// Should probably fill out all the defaults here too, so jsonnet can
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// reference them. In addition, jsonnet validation is more useful
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// (client-side, and gives better line information).
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{
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// resource contructors will use kinds/versions/fields compatible at least with version:
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minKubeVersion: {
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major: 1,
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minor: 9,
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version: "%s.%s" % [self.major, self.minor],
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},
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// Returns array of values from given object. Does not include hidden fields.
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objectValues(o):: [o[field] for field in std.objectFields(o)],
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// Returns array of [key, value] pairs from given object. Does not include hidden fields.
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objectItems(o):: [[k, o[k]] for k in std.objectFields(o)],
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// Replace all occurrences of `_` with `-`.
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hyphenate(s):: std.join("-", std.split(s, "_")),
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// Convert an octal (as a string) to number,
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parseOctal(s):: (
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local len = std.length(s);
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local leading = std.substr(s, 0, len - 1);
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local last = std.parseInt(std.substr(s, len - 1, 1));
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assert last < 8 : "found '%s' digit >= 8" % [last];
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last + (if len > 1 then 8 * $.parseOctal(leading) else 0)
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),
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// Convert {foo: {a: b}} to [{name: foo, a: b}]
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mapToNamedList(o):: [{ name: $.hyphenate(n) } + o[n] for n in std.objectFields(o)],
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// Return object containing only these fields elements
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filterMapByFields(o, fields): { [field]: o[field] for field in std.setInter(std.objectFields(o), fields) },
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// Convert from SI unit suffixes to regular number
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siToNum(n):: (
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local convert =
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if std.endsWith(n, "m") then [1, 0.001]
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else if std.endsWith(n, "K") then [1, 1e3]
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else if std.endsWith(n, "M") then [1, 1e6]
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else if std.endsWith(n, "G") then [1, 1e9]
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else if std.endsWith(n, "T") then [1, 1e12]
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else if std.endsWith(n, "P") then [1, 1e15]
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else if std.endsWith(n, "E") then [1, 1e18]
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else if std.endsWith(n, "Ki") then [2, std.pow(2, 10)]
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else if std.endsWith(n, "Mi") then [2, std.pow(2, 20)]
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else if std.endsWith(n, "Gi") then [2, std.pow(2, 30)]
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else if std.endsWith(n, "Ti") then [2, std.pow(2, 40)]
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else if std.endsWith(n, "Pi") then [2, std.pow(2, 50)]
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else if std.endsWith(n, "Ei") then [2, std.pow(2, 60)]
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else error "Unknown numerical suffix in " + n;
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local n_len = std.length(n);
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std.parseInt(std.substr(n, 0, n_len - convert[0])) * convert[1]
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),
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local remap(v, start, end, newstart) =
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if v >= start && v <= end then v - start + newstart else v,
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local remapChar(c, start, end, newstart) =
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std.char(remap(
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std.codepoint(c), std.codepoint(start), std.codepoint(end), std.codepoint(newstart)
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)),
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toLower(s):: (
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std.join("", [remapChar(c, "A", "Z", "a") for c in std.stringChars(s)])
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),
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toUpper(s):: (
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std.join("", [remapChar(c, "a", "z", "A") for c in std.stringChars(s)])
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),
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boolXor(x, y):: ((if x then 1 else 0) + (if y then 1 else 0) == 1),
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_Object(apiVersion, kind, name):: {
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local this = self,
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apiVersion: apiVersion,
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kind: kind,
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metadata: {
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name: name,
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labels: { name: std.join("-", std.split(this.metadata.name, ":")) },
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annotations: {},
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},
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},
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List(): {
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apiVersion: "v1",
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kind: "List",
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items_:: {},
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items: $.objectValues(self.items_),
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},
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Namespace(name): $._Object("v1", "Namespace", name) {
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},
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Endpoints(name): $._Object("v1", "Endpoints", name) {
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Ip(addr):: { ip: addr },
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Port(p):: { port: p },
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subsets: [],
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},
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Service(name): $._Object("v1", "Service", name) {
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local service = self,
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target_pod:: error "service target_pod required",
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port:: self.target_pod.spec.containers[0].ports[0].containerPort,
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// Helpers that format host:port in various ways
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host:: "%s.%s.svc" % [self.metadata.name, self.metadata.namespace],
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host_colon_port:: "%s:%s" % [self.host, self.spec.ports[0].port],
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http_url:: "http://%s/" % self.host_colon_port,
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proxy_urlpath:: "/api/v1/proxy/namespaces/%s/services/%s/" % [
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self.metadata.namespace,
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self.metadata.name,
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],
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// Useful in Ingress rules
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name_port:: {
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serviceName: service.metadata.name,
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servicePort: service.spec.ports[0].port,
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},
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spec: {
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selector: service.target_pod.metadata.labels,
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ports: [
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{
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port: service.port,
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name: service.target_pod.spec.containers[0].ports[0].name,
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targetPort: service.target_pod.spec.containers[0].ports[0].containerPort,
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},
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],
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type: "ClusterIP",
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},
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},
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PersistentVolume(name): $._Object("v1", "PersistentVolume", name) {
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spec: {},
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},
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// TODO: This is a terrible name
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PersistentVolumeClaimVolume(pvc): {
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persistentVolumeClaim: { claimName: pvc.metadata.name },
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},
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StorageClass(name): $._Object("storage.k8s.io/v1beta1", "StorageClass", name) {
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provisioner: error "provisioner required",
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},
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PersistentVolumeClaim(name): $._Object("v1", "PersistentVolumeClaim", name) {
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local pvc = self,
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storageClass:: null,
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storage:: error "storage required",
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metadata+: if pvc.storageClass != null then {
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annotations+: {
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"volume.beta.kubernetes.io/storage-class": pvc.storageClass,
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},
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} else {},
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spec: {
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resources: {
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requests: {
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storage: pvc.storage,
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},
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},
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accessModes: ["ReadWriteOnce"],
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[if pvc.storageClass != null then "storageClassName"]: pvc.storageClass,
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},
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},
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Container(name): {
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name: name,
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image: error "container image value required",
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imagePullPolicy: if std.endsWith(self.image, ":latest") then "Always" else "IfNotPresent",
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envList(map):: [
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if std.type(map[x]) == "object"
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then {
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name: x,
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valueFrom: map[x],
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} else {
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// Let `null` value stay as such (vs string-ified)
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name: x,
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value: if map[x] == null then null else std.toString(map[x]),
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}
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for x in std.objectFields(map)
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],
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env_:: {},
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env: self.envList(self.env_),
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args_:: {},
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args: ["--%s=%s" % kv for kv in $.objectItems(self.args_)],
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ports_:: {},
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ports: $.mapToNamedList(self.ports_),
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volumeMounts_:: {},
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volumeMounts: $.mapToNamedList(self.volumeMounts_),
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stdin: false,
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tty: false,
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assert !self.tty || self.stdin : "tty=true requires stdin=true",
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},
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PodDisruptionBudget(name): $._Object("policy/v1beta1", "PodDisruptionBudget", name) {
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local this = self,
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target_pod:: error "target_pod required",
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spec: {
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assert $.boolXor(
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std.objectHas(self, "minAvailable"),
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std.objectHas(self, "maxUnavailable")
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) : "PDB '%s': exactly one of minAvailable/maxUnavailable required" % name,
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selector: {
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matchLabels: this.target_pod.metadata.labels,
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},
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},
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},
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Pod(name): $._Object("v1", "Pod", name) {
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spec: $.PodSpec,
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},
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PodSpec: {
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// The 'first' container is used in various defaults in k8s.
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local container_names = std.objectFields(self.containers_),
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default_container:: if std.length(container_names) > 1 then "default" else container_names[0],
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containers_:: {},
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local container_names_ordered = [self.default_container] + [n for n in container_names if n != self.default_container],
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containers: (
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assert std.length(self.containers_) > 0 : "Pod must have at least one container (via containers_ map)";
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[{ name: $.hyphenate(name) } + self.containers_[name] for name in container_names_ordered if self.containers_[name] != null]
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),
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// Note initContainers are inherently ordered, and using this
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// named object will lose that ordering. If order matters, then
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// manipulate `initContainers` directly (perhaps
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// appending/prepending to `super.initContainers` to mix+match
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// both approaches)
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initContainers_:: {},
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initContainers: [{ name: $.hyphenate(name) } + self.initContainers_[name] for name in std.objectFields(self.initContainers_) if self.initContainers_[name] != null],
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volumes_:: {},
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volumes: $.mapToNamedList(self.volumes_),
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imagePullSecrets: [],
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terminationGracePeriodSeconds: 30,
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assert std.length(self.containers) > 0 : "Pod must have at least one container (via containers array)",
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// Return an array of pod's ports numbers
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ports(proto):: [
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p.containerPort
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for p in std.flattenArrays([
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c.ports
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for c in self.containers
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])
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if (
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(!(std.objectHas(p, "protocol")) && proto == "TCP")
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||
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((std.objectHas(p, "protocol")) && p.protocol == proto)
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)
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],
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},
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EmptyDirVolume(): {
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emptyDir: {},
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},
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HostPathVolume(path, type=""): {
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hostPath: { path: path, type: type },
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},
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GitRepoVolume(repository, revision): {
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gitRepo: {
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repository: repository,
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// "master" is possible, but should be avoided for production
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revision: revision,
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},
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},
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SecretVolume(secret): {
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secret: { secretName: secret.metadata.name },
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},
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ConfigMapVolume(configmap): {
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configMap: { name: configmap.metadata.name },
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},
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ConfigMap(name): $._Object("v1", "ConfigMap", name) {
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data: {},
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// I keep thinking data values can be any JSON type. This check
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// will remind me that they must be strings :(
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local nonstrings = [
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k
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for k in std.objectFields(self.data)
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if std.type(self.data[k]) != "string"
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],
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assert std.length(nonstrings) == 0 : "data contains non-string values: %s" % [nonstrings],
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},
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// subtype of EnvVarSource
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ConfigMapRef(configmap, key): {
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assert std.objectHas(configmap.data, key) : "ConfigMap '%s' doesn't have '%s' field in configmap.data" % [configmap.metadata.name, key],
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configMapKeyRef: {
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name: configmap.metadata.name,
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key: key,
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},
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},
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Secret(name): $._Object("v1", "Secret", name) {
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local secret = self,
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type: "Opaque",
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data_:: {},
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data: { [k]: std.base64(secret.data_[k]) for k in std.objectFields(secret.data_) },
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},
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// subtype of EnvVarSource
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SecretKeyRef(secret, key): {
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assert std.objectHas(secret.data, key) : "Secret '%s' doesn't have '%s' field in secret.data" % [secret.metadata.name, key],
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secretKeyRef: {
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name: secret.metadata.name,
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key: key,
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},
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},
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// subtype of EnvVarSource
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FieldRef(key): {
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fieldRef: {
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apiVersion: "v1",
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fieldPath: key,
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},
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},
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// subtype of EnvVarSource
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ResourceFieldRef(key, divisor="1"): {
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resourceFieldRef: {
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resource: key,
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divisor: std.toString(divisor),
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},
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},
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Deployment(name): $._Object("apps/v1", "Deployment", name) {
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local deployment = self,
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spec: {
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template: {
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spec: $.PodSpec,
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metadata: {
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labels: deployment.metadata.labels,
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annotations: {},
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},
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},
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selector: {
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matchLabels: deployment.spec.template.metadata.labels,
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},
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strategy: {
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type: "RollingUpdate",
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local pvcs = [
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v
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for v in deployment.spec.template.spec.volumes
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if std.objectHas(v, "persistentVolumeClaim")
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],
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local is_stateless = std.length(pvcs) == 0,
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// Apps trying to maintain a majority quorum or similar will
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// want to tune these carefully.
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// NB: Upstream default is surge=1 unavail=1
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rollingUpdate: if is_stateless then {
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maxSurge: "25%", // rounds up
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maxUnavailable: "25%", // rounds down
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} else {
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// Poor-man's StatelessSet. Useful mostly with replicas=1.
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maxSurge: 0,
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maxUnavailable: 1,
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},
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},
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// NB: Upstream default is 0
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minReadySeconds: 30,
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// NB: Regular k8s default is to keep all revisions
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revisionHistoryLimit: 10,
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replicas: 1,
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},
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},
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CrossVersionObjectReference(target): {
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apiVersion: target.apiVersion,
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kind: target.kind,
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name: target.metadata.name,
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},
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HorizontalPodAutoscaler(name): $._Object("autoscaling/v1", "HorizontalPodAutoscaler", name) {
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local hpa = self,
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target:: error "target required",
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spec: {
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scaleTargetRef: $.CrossVersionObjectReference(hpa.target),
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minReplicas: hpa.target.spec.replicas,
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maxReplicas: error "maxReplicas required",
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assert self.maxReplicas >= self.minReplicas,
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},
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},
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StatefulSet(name): $._Object("apps/v1", "StatefulSet", name) {
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local sset = self,
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|
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spec: {
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serviceName: name,
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updateStrategy: {
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type: "RollingUpdate",
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rollingUpdate: {
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partition: 0,
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},
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},
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template: {
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spec: $.PodSpec,
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metadata: {
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labels: sset.metadata.labels,
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annotations: {},
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},
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|
},
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selector: {
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|
matchLabels: sset.spec.template.metadata.labels,
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},
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|
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|
volumeClaimTemplates_:: {},
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|
volumeClaimTemplates: [
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// StatefulSet is overly fussy about "changes" (even when
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// they're no-ops).
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|
// In particular annotations={} is apparently a "change",
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// since the comparison is ignorant of defaults.
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|
std.prune($.PersistentVolumeClaim($.hyphenate(kv[0])) + { apiVersion:: null, kind:: null } + kv[1])
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for kv in $.objectItems(self.volumeClaimTemplates_)
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],
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replicas: 1,
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assert self.replicas >= 1,
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},
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},
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|
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|
Job(name): $._Object("batch/v1", "Job", name) {
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|
local job = self,
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|
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spec: $.JobSpec {
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template+: {
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metadata+: {
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labels: job.metadata.labels,
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},
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},
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},
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},
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|
CronJob(name): $._Object("batch/v1beta1", "CronJob", name) {
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|
local cronjob = self,
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|
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spec: {
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|
jobTemplate: {
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|
spec: $.JobSpec {
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template+: {
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metadata+: {
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labels: cronjob.metadata.labels,
|
|
},
|
|
},
|
|
},
|
|
},
|
|
schedule: error "Need to provide spec.schedule",
|
|
successfulJobsHistoryLimit: 10,
|
|
failedJobsHistoryLimit: 20,
|
|
// NB: upstream concurrencyPolicy default is "Allow"
|
|
concurrencyPolicy: "Forbid",
|
|
},
|
|
},
|
|
|
|
JobSpec: {
|
|
local this = self,
|
|
|
|
template: {
|
|
spec: $.PodSpec {
|
|
restartPolicy: "OnFailure",
|
|
},
|
|
},
|
|
completions: 1,
|
|
parallelism: 1,
|
|
},
|
|
|
|
DaemonSet(name): $._Object("apps/v1", "DaemonSet", name) {
|
|
local ds = self,
|
|
spec: {
|
|
updateStrategy: {
|
|
type: "RollingUpdate",
|
|
rollingUpdate: {
|
|
maxUnavailable: 1,
|
|
},
|
|
},
|
|
template: {
|
|
metadata: {
|
|
labels: ds.metadata.labels,
|
|
annotations: {},
|
|
},
|
|
spec: $.PodSpec,
|
|
},
|
|
|
|
selector: {
|
|
matchLabels: ds.spec.template.metadata.labels,
|
|
},
|
|
},
|
|
},
|
|
|
|
Ingress(name): $._Object("networking.k8s.io/v1beta1", "Ingress", name) {
|
|
spec: {},
|
|
|
|
local rel_paths = [
|
|
p.path
|
|
for r in self.spec.rules
|
|
for p in r.http.paths
|
|
if !std.startsWith(p.path, "/")
|
|
],
|
|
assert std.length(rel_paths) == 0 : "paths must be absolute: " + rel_paths,
|
|
},
|
|
|
|
ThirdPartyResource(name): $._Object("extensions/v1beta1", "ThirdPartyResource", name) {
|
|
versions_:: [],
|
|
versions: [{ name: n } for n in self.versions_],
|
|
},
|
|
|
|
CustomResourceDefinition(group, version, kind): {
|
|
local this = self,
|
|
apiVersion: "apiextensions.k8s.io/v1beta1",
|
|
kind: "CustomResourceDefinition",
|
|
metadata+: {
|
|
name: this.spec.names.plural + "." + this.spec.group,
|
|
},
|
|
spec: {
|
|
scope: "Namespaced",
|
|
group: group,
|
|
version: version,
|
|
names: {
|
|
kind: kind,
|
|
singular: $.toLower(self.kind),
|
|
plural: self.singular + "s",
|
|
listKind: self.kind + "List",
|
|
},
|
|
},
|
|
},
|
|
|
|
ServiceAccount(name): $._Object("v1", "ServiceAccount", name) {
|
|
},
|
|
|
|
Role(name): $._Object("rbac.authorization.k8s.io/v1beta1", "Role", name) {
|
|
rules: [],
|
|
},
|
|
|
|
ClusterRole(name): $.Role(name) {
|
|
kind: "ClusterRole",
|
|
},
|
|
|
|
Group(name): {
|
|
kind: "Group",
|
|
name: name,
|
|
apiGroup: "rbac.authorization.k8s.io",
|
|
},
|
|
|
|
User(name): {
|
|
kind: "User",
|
|
name: name,
|
|
apiGroup: "rbac.authorization.k8s.io",
|
|
},
|
|
|
|
RoleBinding(name): $._Object("rbac.authorization.k8s.io/v1beta1", "RoleBinding", name) {
|
|
local rb = self,
|
|
|
|
subjects_:: [],
|
|
subjects: [{
|
|
kind: o.kind,
|
|
namespace: o.metadata.namespace,
|
|
name: o.metadata.name,
|
|
} for o in self.subjects_],
|
|
|
|
roleRef_:: error "roleRef is required",
|
|
roleRef: {
|
|
apiGroup: "rbac.authorization.k8s.io",
|
|
kind: rb.roleRef_.kind,
|
|
name: rb.roleRef_.metadata.name,
|
|
},
|
|
},
|
|
|
|
ClusterRoleBinding(name): $.RoleBinding(name) {
|
|
kind: "ClusterRoleBinding",
|
|
},
|
|
|
|
// NB: encryptedData can be imported into a SealedSecret as follows:
|
|
// kubectl get secret ... -ojson mysec | kubeseal | jq -r .spec.encryptedData > sealedsecret.json
|
|
// encryptedData: std.parseJson(importstr "sealedsecret.json")
|
|
SealedSecret(name): $._Object("bitnami.com/v1alpha1", "SealedSecret", name) {
|
|
spec: {
|
|
encryptedData: {},
|
|
},
|
|
assert std.length(std.objectFields(self.spec.encryptedData)) != 0 : "SealedSecret '%s' has empty encryptedData field" % name,
|
|
},
|
|
|
|
// NB: helper method to access several Kubernetes objects podRef,
|
|
// used below to extract its labels
|
|
podRef(obj):: ({
|
|
Pod: obj,
|
|
Deployment: obj.spec.template,
|
|
StatefulSet: obj.spec.template,
|
|
DaemonSet: obj.spec.template,
|
|
Job: obj.spec.template,
|
|
CronJob: obj.spec.jobTemplate.spec.template,
|
|
}[obj.kind]),
|
|
|
|
// NB: return a { podSelector: ... } ready to use for e.g. NSPs (see below)
|
|
// pod labels can be optionally filtered by their label name 2nd array arg
|
|
podLabelsSelector(obj, filter=null):: {
|
|
podSelector: std.prune({
|
|
matchLabels:
|
|
if filter != null then $.filterMapByFields($.podRef(obj).metadata.labels, filter)
|
|
else $.podRef(obj).metadata.labels,
|
|
}),
|
|
},
|
|
|
|
// NB: Returns an array as [{ port: num, protocol: "PROTO" }, {...}, ... ]
|
|
// Need to split TCP, UDP logic to be able to dedup each set of protocol ports
|
|
podsPorts(obj_list):: std.flattenArrays([
|
|
[
|
|
{ port: port, protocol: protocol }
|
|
for port in std.set(
|
|
std.flattenArrays([$.podRef(obj).spec.ports(protocol) for obj in obj_list])
|
|
)
|
|
]
|
|
for protocol in ["TCP", "UDP"]
|
|
]),
|
|
|
|
// NB: most of the "helper" stuff comes from above (podLabelsSelector, podsPorts),
|
|
// NetworkPolicy returned object will have "Ingress", "Egress" policyTypes auto-set
|
|
// based on populated spec.ingress or spec.egress
|
|
// See tests/test-simple-validate.jsonnet for example(s).
|
|
NetworkPolicy(name): $._Object("networking.k8s.io/v1", "NetworkPolicy", name) {
|
|
local networkpolicy = self,
|
|
spec: {
|
|
policyTypes: std.prune([
|
|
if networkpolicy.spec.ingress != [] then "Ingress" else null,
|
|
if networkpolicy.spec.egress != [] then "Egress" else null,
|
|
]),
|
|
ingress: $.objectValues(self.ingress_),
|
|
ingress_:: {},
|
|
egress: $.objectValues(self.egress_),
|
|
egress_:: {},
|
|
podSelector: {},
|
|
},
|
|
},
|
|
|
|
VerticalPodAutoscaler(name):: $._Object("autoscaling.k8s.io/v1beta2", "VerticalPodAutoscaler", name) {
|
|
local vpa = self,
|
|
|
|
target:: error "target required",
|
|
|
|
spec: {
|
|
targetRef: $.CrossVersionObjectReference(vpa.target),
|
|
|
|
updatePolicy: {
|
|
updateMode: "Auto",
|
|
},
|
|
},
|
|
},
|
|
// Helper function to ease VPA creation as e.g.:
|
|
// foo_vpa:: kube.createVPAFor($.foo_deploy)
|
|
createVPAFor(target, mode="Auto"):: $.VerticalPodAutoscaler(target.metadata.name) {
|
|
target:: target,
|
|
|
|
metadata+: {
|
|
namespace: target.metadata.namespace,
|
|
labels+: target.metadata.labels,
|
|
},
|
|
spec+: {
|
|
updatePolicy+: {
|
|
updateMode: mode,
|
|
},
|
|
},
|
|
},
|
|
}
|