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Allow configuration of patroni's replication mode (zalando#869)
* Add patroni parameters for `synchronous_mode` * Update complete-postgres-manifest.yaml, removed quotation marks * Update k8sres_test.go, adjust result for `Patroni configured` * Update k8sres_test.go, adjust result for `Patroni configured` * Update complete-postgres-manifest.yaml, set synchronous mode to false in this example * Update pkg/cluster/k8sres.go Does the same but is shorter. So we fix that it if you like. Co-Authored-By: Felix Kunde <[email protected]> * Update docs/reference/cluster_manifest.md Co-Authored-By: Felix Kunde <[email protected]> * Add patroni's `synchronous_mode_strict` * Extend `TestGenerateSpiloConfig` with `SynchronousModeStrict` Co-authored-by: Felix Kunde <[email protected]>
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‎charts/postgres-operator/crds/postgresqls.yaml‎

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@@ -218,6 +218,10 @@ spec:
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type: integer
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retry_timeout:
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type: integer
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synchronous_mode:
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type: boolean
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synchronous_mode_strict:
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type: boolean
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maximum_lag_on_failover:
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type: integer
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podAnnotations:

‎docs/reference/cluster_manifest.md‎

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@@ -217,6 +217,12 @@ explanation of `ttl` and `loop_wait` parameters.
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automatically created by Patroni for cluster members and permanent replication
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slots. Optional.
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* **synchronous_mode**
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Patroni `synchronous_mode` parameter value. The default is set to `false`. Optional.
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* **synchronous_mode_strict**
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Patroni `synchronous_mode_strict` parameter value. Can be used in addition to `synchronous_mode`. The default is set to `false`. Optional.
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## Postgres container resources
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Those parameters define [CPU and memory requests and limits](https://kubernetes.io/docs/concepts/configuration/manage-compute-resources-container/)

‎manifests/complete-postgres-manifest.yaml‎

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@@ -67,6 +67,8 @@ spec:
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ttl: 30
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loop_wait: &loop_wait 10
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retry_timeout: 10
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synchronous_mode: false
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synchronous_mode_strict: false
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maximum_lag_on_failover: 33554432
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# restore a Postgres DB with point-in-time-recovery

‎manifests/postgresql.crd.yaml‎

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type: integer
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maximum_lag_on_failover:
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type: integer
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synchronous_mode:
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type: boolean
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synchronous_mode_strict:
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type: boolean
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podAnnotations:
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type: object
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additionalProperties:

‎pkg/apis/acid.zalan.do/v1/crds.go‎

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@@ -358,6 +358,12 @@ var PostgresCRDResourceValidation = apiextv1beta1.CustomResourceValidation{
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"maximum_lag_on_failover": {
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Type: "integer",
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},
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"synchronous_mode": {
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Type: "boolean",
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},
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"synchronous_mode_strict": {
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Type: "boolean",
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},
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},
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},
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"podAnnotations": {

‎pkg/apis/acid.zalan.do/v1/postgresql_type.go‎

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@@ -118,13 +118,15 @@ type Resources struct {
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// Patroni contains Patroni-specific configuration
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type Patroni struct {
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InitDB map[string]string `json:"initdb"`
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PgHba []string `json:"pg_hba"`
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TTL uint32 `json:"ttl"`
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LoopWait uint32 `json:"loop_wait"`
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RetryTimeout uint32 `json:"retry_timeout"`
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MaximumLagOnFailover float32 `json:"maximum_lag_on_failover"` // float32 because https://github.com/kubernetes/kubernetes/issues/30213
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Slots map[string]map[string]string `json:"slots"`
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InitDB map[string]string `json:"initdb"`
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PgHba []string `json:"pg_hba"`
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TTL uint32 `json:"ttl"`
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LoopWait uint32 `json:"loop_wait"`
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RetryTimeout uint32 `json:"retry_timeout"`
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MaximumLagOnFailover float32 `json:"maximum_lag_on_failover"` // float32 because https://github.com/kubernetes/kubernetes/issues/30213
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Slots map[string]map[string]string `json:"slots"`
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SynchronousMode bool `json:"synchronous_mode"`
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SynchronousModeStrict bool `json:"synchronous_mode_strict"`
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}
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//StandbyCluster

‎pkg/cluster/k8sres.go‎

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@@ -49,6 +49,8 @@ type patroniDCS struct {
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LoopWait uint32 `json:"loop_wait,omitempty"`
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RetryTimeout uint32 `json:"retry_timeout,omitempty"`
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MaximumLagOnFailover float32 `json:"maximum_lag_on_failover,omitempty"`
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SynchronousMode bool `json:"synchronous_mode,omitempty"`
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SynchronousModeStrict bool `json:"synchronous_mode_strict,omitempty"`
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PGBootstrapConfiguration map[string]interface{} `json:"postgresql,omitempty"`
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Slots map[string]map[string]string `json:"slots,omitempty"`
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}
@@ -283,6 +285,12 @@ PatroniInitDBParams:
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if patroni.Slots != nil {
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config.Bootstrap.DCS.Slots = patroni.Slots
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}
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if patroni.SynchronousMode {
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config.Bootstrap.DCS.SynchronousMode = patroni.SynchronousMode
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}
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if patroni.SynchronousModeStrict != false {
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config.Bootstrap.DCS.SynchronousModeStrict = patroni.SynchronousModeStrict
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}
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config.PgLocalConfiguration = make(map[string]interface{})
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config.PgLocalConfiguration[patroniPGBinariesParameterName] = fmt.Sprintf(pgBinariesLocationTemplate, pg.PgVersion)

‎pkg/cluster/k8sres_test.go‎

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@@ -65,16 +65,18 @@ func TestGenerateSpiloJSONConfiguration(t *testing.T) {
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"locale": "en_US.UTF-8",
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"data-checksums": "true",
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},
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PgHba: []string{"hostssl all all 0.0.0.0/0 md5", "host all all 0.0.0.0/0 md5"},
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TTL: 30,
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LoopWait: 10,
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RetryTimeout: 10,
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MaximumLagOnFailover: 33554432,
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Slots: map[string]map[string]string{"permanent_logical_1": {"type": "logical", "database": "foo", "plugin": "pgoutput"}},
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PgHba: []string{"hostssl all all 0.0.0.0/0 md5", "host all all 0.0.0.0/0 md5"},
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TTL: 30,
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LoopWait: 10,
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RetryTimeout: 10,
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MaximumLagOnFailover: 33554432,
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SynchronousMode: true,
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SynchronousModeStrict: true,
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Slots: map[string]map[string]string{"permanent_logical_1": {"type": "logical", "database": "foo", "plugin": "pgoutput"}},
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},
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role: "zalandos",
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opConfig: config.Config{},
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result: `{"postgresql":{"bin_dir":"/usr/lib/postgresql/11/bin","pg_hba":["hostssl all all 0.0.0.0/0 md5","host all all 0.0.0.0/0 md5"]},"bootstrap":{"initdb":[{"auth-host":"md5"},{"auth-local":"trust"},"data-checksums",{"encoding":"UTF8"},{"locale":"en_US.UTF-8"}],"users":{"zalandos":{"password":"","options":["CREATEDB","NOLOGIN"]}},"dcs":{"ttl":30,"loop_wait":10,"retry_timeout":10,"maximum_lag_on_failover":33554432,"slots":{"permanent_logical_1":{"database":"foo","plugin":"pgoutput","type":"logical"}}}}}`,
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result: `{"postgresql":{"bin_dir":"/usr/lib/postgresql/11/bin","pg_hba":["hostssl all all 0.0.0.0/0 md5","host all all 0.0.0.0/0 md5"]},"bootstrap":{"initdb":[{"auth-host":"md5"},{"auth-local":"trust"},"data-checksums",{"encoding":"UTF8"},{"locale":"en_US.UTF-8"}],"users":{"zalandos":{"password":"","options":["CREATEDB","NOLOGIN"]}},"dcs":{"ttl":30,"loop_wait":10,"retry_timeout":10,"maximum_lag_on_failover":33554432,"synchronous_mode":true,"synchronous_mode_strict":true,"slots":{"permanent_logical_1":{"database":"foo","plugin":"pgoutput","type":"logical"}}}}}`,
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},
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}
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for _, tt := range tests {

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