Patroni exclusion for Postgres

This PS removes the previously put in place HA clustering support Patroni provided. Change-Id: I03ed11282413a454062ab34b8594ba60ac2175aa
2020-04-24 22:36:21 +00:00 · 2020-04-24 22:36:21 +00:00 · 96369491cb
commit 96369491cb
parent 303d5e3108
12 changed files with 82 additions and 665 deletions
--- a/postgresql/templates/bin/_patroni_conversion.sh.tpl
+++ b/postgresql/templates/bin/_patroni_conversion.sh.tpl
@ -1,121 +0,0 @@
-#!/bin/bash
-
-{{/*
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-   http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
-*/}}
-
-# This script creates the patroni replication user if it doesn't exist.
-# This is only needed for brownfield upgrade scenarios, on top of sites that
-# were greenfield-deployed with a pre-patroni version of postgres.
-#
-# For greenfield deployments, the patroni-enabled postgresql chart will
-# create this user automatically.
-#
-# If any additional conversion steps are found to be needed, they can go here.
-
-set -ex
-
-function patroni_started() {
-    HOST=$1
-    PORT=$2
-    STATUS=$(timeout 10 bash -c "exec 3<>/dev/tcp/${HOST}/${PORT};
-      echo -e \"GET / HTTP/1.1\r\nConnection: close\r\n\" >&3;
-      cat <&3 | tail -n1 | grep -o \"running\"")
-
-    [[ x${STATUS} == "xrunning" ]]
-}
-
-PGDATABASE=${PGDATABASE:-'postgres'}
-PGHOST=${PGHOST:-'127.0.0.1'}
-PGPORT={{- tuple "postgresql" "internal" "postgresql" . | include "helm-toolkit.endpoints.endpoint_port_lookup" }}
-PSQL="psql -h ${PGHOST} -p ${PGPORT} -d ${PGDATABASE}"
-
-PVC_MNT={{- .Values.storage.mount.path }}
-FILE_MADE_BY_POSTGRES=${PVC_MNT}/pgdata/pg_xlog
-FILE_MADE_BY_PATRONI=${PVC_MNT}/pgdata/patroni.dynamic.json
-
-TIMEOUT=0
-
-# Only need to add the user once, on the first replica
-if [ "x${POD_NAME}" != "xpostgresql-0" ]; then
-  echo "Nothing to do on ${POD_NAME}"
-  exit 0
-fi
-
-# Look for a file-based clue that we're migrating from vanilla pg to patroni.
-# This is lighter-weight than checking in the database for the user, since
-# we have to fire up the database at this point to do the check.
-if [[ -e "${FILE_MADE_BY_POSTGRES}" && ! -e "${FILE_MADE_BY_PATRONI}" ]]
-then
-  echo "We are upgrading to Patroni -- checking for replication user"
-
-  # Fire up a temporary postgres
-  /docker-entrypoint.sh postgres &
-  while ! $PSQL -c "select 1;"; do
-    sleep 1
-    if [[ $TIMEOUT -gt 120 ]]; then
-      exit 1
-    fi
-    TIMEOUT=$((TIMEOUT+1))
-  done
-  TIMEOUT=0
-
-  # Add the replication user if it doesn't exist
-  USER_COUNT=$(${PSQL} -qt -c \
-                  "SELECT COUNT(*) FROM pg_roles \
-                   WHERE rolname='${PATRONI_REPLICATION_USERNAME}'")
-
-  if [ ${USER_COUNT} -eq 0 ]; then
-    echo "The patroni replication user ${PATRONI_REPLICATION_USERNAME} doesn't exist yet; creating:"
-    # CREATE ROLE defaults to NOLOGIN not to allow password based login.
-    # Replication user uses SSL Cert to connect.
-    ${PSQL} -c "CREATE ROLE ${PATRONI_REPLICATION_USERNAME} \
-                WITH REPLICATION;"
-    echo "done."
-  else
-    echo "The patroni replication user ${PATRONI_REPLICATION_USERNAME} already exists: nothing to do."
-  fi
-
-  # Start Patroni to assimilate the postgres
-  sed "s/POD_IP_PATTERN/${PATRONI_KUBERNETES_POD_IP}/g" \
-      /tmp/patroni-templated.yaml > /tmp/patroni.yaml
-
-  READY_FLAG="i am the leader with the lock"
-  PATRONI_LOG=/tmp/patroni_conversion.log
-  /usr/bin/python3 /usr/local/bin/patroni /tmp/patroni-templated.yaml &> ${PATRONI_LOG} &
-
-  # Sleep until patroni is running
-  while ! grep -q "${READY_FLAG}" ${PATRONI_LOG}; do
-    sleep 5
-    if [[ $TIMEOUT -gt 24 ]]; then
-      echo "A timeout occurred.  Patroni logs:"
-      cat ${PATRONI_LOG}
-      exit 1
-    fi
-    TIMEOUT=$((TIMEOUT+1))
-  done
-  TIMEOUT=0
-
-  # Gracefully stop postgres and patroni
-  while pkill INT --uid postgres; do
-    sleep 5
-    if [[ $TIMEOUT -gt 24 ]]; then
-      echo "A timeout occurred.  Patroni logs:"
-      cat ${PATRONI_LOG}
-      exit 1
-    fi
-    TIMEOUT=$((TIMEOUT+1))
-  done
-else
-  echo "Patroni is already in place: nothing to do."
-fi
--- a/postgresql/templates/bin/_readiness.sh.tpl
+++ b/postgresql/templates/bin/_readiness.sh.tpl
@ -16,8 +16,4 @@ limitations under the License.

 set -ex

-if [ -f /tmp/postgres-disable-liveness-probe ]; then
-  exit 0
-else
-  pg_isready -U ${PATRONI_SUPERUSER_USERNAME}
-fi
+pg_isready -U ${POSTGRES_USER}
--- a/postgresql/templates/bin/_set_password.sh.tpl
+++ b/postgresql/templates/bin/_set_password.sh.tpl
@ -1,43 +0,0 @@
-#!/usr/bin/env bash
-
-{{/*
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-   http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
-*/}}
-
-PGDATABASE=${PGDATABASE:-'postgres'}
-PGHOST=${PGHOST:-'127.0.0.1'}
-PGPORT={{ tuple "postgresql" "internal" "postgresql" . | include "helm-toolkit.endpoints.endpoint_port_lookup" }}
-
-# These are passed in via the Patroni callback interface
-action="$1"
-role="$2"
-cluster="$3"
-
-# Note: this script when rendered is stored in a secret and encrypted to disk.
-PATRONI_SUPERUSER_USERNAME={{ .Values.endpoints.postgresql.auth.admin.username }}
-PATRONI_SUPERUSER_PASSWORD={{ .Values.endpoints.postgresql.auth.admin.password }}
-PATRONI_REPLICATION_USERNAME={{ .Values.endpoints.postgresql.auth.replica.username }}
-
-if [[ x${role} == "xmaster" ]]; then
-  echo "I have become the patroni master: updating superuser and replication passwords"
-
-  # It can take a few seconds for a freshly promoted leader to become read/write.
-  sleep 10
-  if [[ ! -z "$PATRONI_SUPERUSER_PASSWORD" && ! -z "$PATRONI_SUPERUSER_USERNAME" ]]; then
-    psql -U $PATRONI_SUPERUSER_USERNAME -p "$PGPORT" -d "$PGDATABASE" -c "ALTER ROLE $PATRONI_SUPERUSER_USERNAME WITH PASSWORD '$PATRONI_SUPERUSER_PASSWORD';"
-  else
-    echo "WARNING: Did not set superuser password!!!"
-  fi
-
-  echo "password update complete"
-fi
--- a/postgresql/templates/bin/_start.sh.tpl
+++ b/postgresql/templates/bin/_start.sh.tpl
@ -14,62 +14,25 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */}}

-set -ex
+# Disable echo mode while setting the password
+# unless we are in debug mode
+{{- if .Values.conf.debug }}
+set -x
+{{- end }}
+set -e

-function patroni_started() {
-  HOST=$1
-  PORT=$2
-  STATUS=$(timeout 10 bash -c "exec 3<>/dev/tcp/${HOST}/${PORT};
-    echo -e \"GET / HTTP/1.1\r\nConnection: close\r\n\" >&3;
-    cat <&3 | tail -n1 | grep -o \"running\"")
+POSTGRES_DB=${POSTGRES_DB:-"postgres"}

-  [[ x${STATUS} == "xrunning" ]]
-}
-SVC_FQDN='{{ tuple "postgresql-restapi" "internal" . | include "helm-toolkit.endpoints.hostname_fqdn_endpoint_lookup" }}'
-SVC_PORT='{{ tuple "postgresql-restapi" "internal" "restapi" . | include "helm-toolkit.endpoints.endpoint_port_lookup" }}'
+# Check if the Postgres data directory exists before attempting to
+# set the password
+if [[ -d "$PGDATA" && -s "$PGDATA/PG_VERSION" ]]
+then
+  postgres --single -D "$PGDATA" "$POSTGRES_DB" <<EOF
+ALTER ROLE $POSTGRES_USER WITH PASSWORD '$POSTGRES_PASSWORD'
+EOF

-# This is required because the declarative values.yaml config doesn't
-# know the dynamic podIP.  TODO: something more elegant.
-sed "s/POD_IP_PATTERN/${PATRONI_KUBERNETES_POD_IP}/g" \
-    /tmp/patroni-templated.yaml > \
-    /tmp/patroni.yaml
-
-FILE_MADE_BY_PATRONI=${PGDATA}/patroni.dynamic.json
-if [[ ! $POD_NAME -eq "postgresql-0" ]]; then
-
-  echo "I am not postgresql pod zero: disabling liveness probe temporarily"
-  # disable liveness probe as it may take some time for the pod to come online
-  touch /tmp/postgres-disable-liveness-probe
-
-  # During normal upgrades, we just need to turn liveness probes off temporarily
-  # for the sake of password rotation - need to bounce all pods at once
-  # (overriding RollingUpdate) to avoid deadlock.  This accounts for that.
-  sleep 60
-
-  # During initial bootstrapping, we need to sequence 0,1,2
-  if [[ ! -e "${FILE_MADE_BY_PATRONI}" ]]; then
-    echo "patroni has not been initialized on this node"
-    # NOTE: this boolean forces a second check after a delay.  This accounts for a
-    # scenario during initial vanilla postgres -> patroni conversion, where
-    # a temporary master is brought up, killed off, and then restarted.
-    # This can be safely removed in the future, once all clusters are converted.
-    WAITED_EXTRA="false"
-
-    while [ ${WAITED_EXTRA} = "false" ]; do
-      while ! patroni_started "${SVC_FQDN}" "${SVC_PORT}"; do
-        echo "Waiting until a Leader is elected..."
-        sleep 5
-      done
-      # See note above: this code can be removed once all clusters are Patroni.
-      if [ ${WAITED_EXTRA} = "false" ]; then
-        echo "Leader is up; sleeping to ensure it gets through restarts..."
-        sleep 10
-        WAITED_EXTRA="true"
-      fi
-    done
-  fi
-
-  rm -fv /tmp/postgres-disable-liveness-probe
 fi

-exec /usr/bin/python3 /usr/local/bin/patroni /tmp/patroni.yaml
+set -x
+
+exec /docker-entrypoint.sh postgres -c config_file=/tmp/postgresql.conf
--- a/postgresql/templates/configmap-bin.yaml
+++ b/postgresql/templates/configmap-bin.yaml
@ -38,6 +38,4 @@ data:
 {{- if .Values.manifests.job_ks_user }}
  ks-user.sh: {{ include "helm-toolkit.scripts.keystone_user" . | b64enc }}
 {{- end }}
-  set_password.sh: {{ tuple "bin/_set_password.sh.tpl" . | include "helm-toolkit.utils.template" | b64enc }}
-  patroni_conversion.sh: {{ tuple "bin/_patroni_conversion.sh.tpl" . | include "helm-toolkit.utils.template" | b64enc }}
 {{- end }}
--- a/postgresql/templates/configmap-etc.yaml
+++ b/postgresql/templates/configmap-etc.yaml
@ -17,10 +17,14 @@ limitations under the License.

 ---
 apiVersion: v1
-kind: Secret
+kind: ConfigMap
 metadata:
  name: postgresql-etc
-type: Opaque
 data:
-{{- include "helm-toolkit.snippets.values_template_renderer" (dict "envAll" $envAll "template" .Values.conf.patroni "key" "patroni.yaml" "format" "Secret") | indent 2 }}
+  postgresql.conf: |
+{{- range $key, $value := default dict .Values.conf.postgresql }}
+    {{ $key | snakecase }} = '{{ $value }}'
+{{- end }}
+  pg_hba.conf: |
+{{ .Values.conf.pg_hba | indent 4 }}
 {{- end }}
--- a/postgresql/templates/secret-replica.yaml
+++ b/postgresql/templates/secret-replica.yaml
@ -1,25 +0,0 @@
-{{/*
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-   http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
-*/}}
-
-{{- if .Values.manifests.secret_replica }}
---
-apiVersion: v1
-kind: Secret
-metadata:
-  name: {{ .Values.secrets.postgresql.replica }}
-type: Opaque
-data:
-{{ include "helm-toolkit.utils.tls_generate_certs" (dict "params" .Values.secrets.pki.replication "encode" true) | indent 2  }}
-...
-{{- end }}
--- a/postgresql/templates/secret-server.yaml
+++ b/postgresql/templates/secret-server.yaml
@ -1,25 +0,0 @@
-{{/*
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-   http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
-*/}}
-
-{{- if .Values.manifests.secret_server }}
---
-apiVersion: v1
-kind: Secret
-metadata:
-  name: {{ .Values.secrets.postgresql.server }}
-type: Opaque
-data:
-{{ include "helm-toolkit.utils.tls_generate_certs" (dict "params" .Values.secrets.pki.server "encode" true) | indent 2 }}
-...
-{{- end }}
--- a/postgresql/templates/service-postgres.yaml
+++ b/postgresql/templates/service-postgres.yaml
@ -21,6 +21,8 @@ metadata:
  name: {{ tuple "postgresql" "internal" . | include "helm-toolkit.endpoints.hostname_short_endpoint_lookup" }}
 spec:
  ports:
-    - name: postgresql
+    - name: db
      port: {{ tuple "postgresql" "internal" "postgresql" . | include "helm-toolkit.endpoints.endpoint_port_lookup" }}
+  selector:
+{{ tuple $envAll "postgresql" "server" | include "helm-toolkit.snippets.kubernetes_metadata_labels" | indent 4 }}
 {{- end }}
--- a/postgresql/templates/statefulset.yaml
+++ b/postgresql/templates/statefulset.yaml
@ -35,9 +35,6 @@ rules:
      - patch
      - update
      - watch
-      # delete and deletecollection are required only for 'patronictl remove'
-      - delete
-      - deletecollection
  - apiGroups:
      - ""
    resources:
@ -50,9 +47,6 @@ rules:
      - create
      - list
      - watch
-      # delete and deletecollection are required only for 'patronictl remove'
-      - delete
-      - deletecollection
  - apiGroups:
      - ""
    resources:
@ -122,7 +116,6 @@ spec:
        configmap-etc-hash: {{ tuple "configmap-etc.yaml" . | include "helm-toolkit.utils.hash" }}
 {{ dict "envAll" $envAll "podName" "postgresql" "containerNames" (list "postgresql" "set-volume-perms" "init") | include "helm-toolkit.snippets.kubernetes_mandatory_access_control_annotation" | indent 8 }}
        configmap-admin-hash: {{ tuple "secret-admin.yaml" . | include "helm-toolkit.utils.hash" }}
-        configmap-replica-hash: {{ tuple "secret-replica.yaml" . | include "helm-toolkit.utils.hash" }}
        configmap-secrets-etc-hash: {{ tuple "secrets-etc.yaml" . | include "helm-toolkit.utils.hash" }}
    spec:
      serviceAccountName: {{ $serviceAccountName }}
@ -144,132 +137,13 @@ spec:
              /bin/chown {{ .Values.pod.security_context.server.pod.runAsUser }} {{ .Values.storage.mount.path }};
              /bin/chmod 700 {{ .Values.storage.mount.path }};
              /bin/chmod 700 {{ .Values.storage.mount.path }}/*;
-              /bin/cp {{ .Values.secrets.pki.client_cert_path }}_temp/* {{ .Values.secrets.pki.client_cert_path }}/.;
-              /bin/cp {{ .Values.secrets.pki.server_cert_path }}_temp/* {{ .Values.secrets.pki.server_cert_path }}/.;
-              /bin/chown {{ .Values.pod.security_context.server.pod.runAsUser }} {{ .Values.secrets.pki.client_cert_path }};
-              /bin/chown {{ .Values.pod.security_context.server.pod.runAsUser }} {{ .Values.secrets.pki.client_cert_path }}/*;
-              /bin/chown {{ .Values.pod.security_context.server.pod.runAsUser }} {{ .Values.secrets.pki.server_cert_path }};
-              /bin/chown {{ .Values.pod.security_context.server.pod.runAsUser }} {{ .Values.secrets.pki.server_cert_path }}/*;
-              /bin/chmod 700 {{ .Values.secrets.pki.client_cert_path }};
-              /bin/chmod 600 {{ .Values.secrets.pki.client_cert_path }}/*;
-              /bin/chmod 700 {{ .Values.secrets.pki.server_cert_path }};
-              /bin/chmod 600 {{ .Values.secrets.pki.server_cert_path }}/*;
 {{ dict "envAll" $envAll "application" "server" "container" "set_volume_perms" | include "helm-toolkit.snippets.kubernetes_container_security_context" | indent 10 }}
          volumeMounts:
            - name: pod-tmp
              mountPath: /tmp
            - name: postgresql-data
              mountPath: {{ .Values.storage.mount.path }}
-            - name: server-certs
-              mountPath: {{ .Values.secrets.pki.server_cert_path }}
-              # server-cert-temp mountpoint is temp storage for secrets. We copy the
-              # secrets to server-certs folder and set owner and permissions.
-              # This is needed because the secrets are always created readonly.
-            - name: server-certs-temp
-              mountPath: {{ .Values.secrets.pki.server_cert_path }}_temp
-            - name: postgresql-pki
-              subPath: crt
-              mountPath: {{ .Values.secrets.pki.server_cert_path }}_temp/server.crt
-            - name: postgresql-pki
-              subPath: key
-              mountPath: {{ .Values.secrets.pki.server_cert_path }}_temp/server.key
-            - name: replication-pki
-              subPath: ca
-              mountPath: {{ .Values.secrets.pki.server_cert_path }}_temp/ca.crt
-            - name: replication-pki
-              subPath: caKey
-              mountPath: {{ .Values.secrets.pki.server_cert_path }}_temp/ca.key
-              # client-certs is the permanent folder for the client secrets
-            - name: client-certs
-              mountPath: {{ .Values.secrets.pki.client_cert_path }}
-              # client-certs-temp is temporary folder for the client secrets, before they a copied to their permanent folder
-            - name: client-certs-temp
-              mountPath: {{ .Values.secrets.pki.client_cert_path }}_temp
-            - name: replication-pki
-              subPath: crt
-              mountPath: {{ .Values.secrets.pki.client_cert_path }}_temp/client.crt
-            - name: replication-pki
-              subPath: key
-              mountPath: {{ .Values.secrets.pki.client_cert_path }}_temp/client.key
-            - name: postgresql-pki
-              subPath: ca
-              mountPath: {{ .Values.secrets.pki.client_cert_path }}_temp/ca.crt
-            - name: postgresql-pki
-              subPath: caKey
-              mountPath: {{ .Values.secrets.pki.client_cert_path }}_temp/ca.key
-        # This is for non-HA -> Patroni conversion and can be removed in the future
-        - name: patroni-conversion
-{{ tuple $envAll "postgresql" | include "helm-toolkit.snippets.image" | indent 10 }}
-{{ tuple $envAll $envAll.Values.pod.resources.server | include "helm-toolkit.snippets.kubernetes_resources" | indent 10 }}
-          env:
-            - name: PGDATA
-              value: "{{ .Values.storage.mount.path }}/pgdata"
-            - name: PATRONI_KUBERNETES_POD_IP
-              valueFrom:
-                fieldRef:
-                  fieldPath: status.podIP
-            - name: PATRONI_KUBERNETES_NAMESPACE
-              valueFrom:
-                fieldRef:
-                  fieldPath: metadata.namespace
-            - name: KUBERNETES_NAMESPACE
-              valueFrom:
-                fieldRef:
-                  fieldPath: metadata.namespace
-            - name: PATRONI_NAME
-              valueFrom:
-                fieldRef:
-                  fieldPath: metadata.name
-            - name: POD_NAME
-              valueFrom:
-                fieldRef:
-                  fieldPath: metadata.name
-            - name: PATRONI_KUBERNETES_POD_IP
-              valueFrom:
-                fieldRef:
-                  fieldPath: status.podIP
-            - name: PATRONI_SUPERUSER_USERNAME
-              valueFrom:
-                secretKeyRef:
-                  name: {{ .Values.secrets.postgresql.admin }}
-                  key: 'POSTGRES_USER'
-            - name: PATRONI_SUPERUSER_PASSWORD
-              valueFrom:
-                secretKeyRef:
-                  name: {{ .Values.secrets.postgresql.admin }}
-                  key: 'POSTGRES_PASSWORD'
-            - name: PATRONI_REPLICATION_USERNAME
-              value: {{ index .Values.secrets.pki.replication.hosts.names 0 | quote }}
-            - name: PATRONI_RESTAPI_CONNECT_ADDRESS
-              value: $(PATRONI_KUBERNETES_POD_IP):{{ tuple "postgresql-restapi" "internal" "restapi" . | include "helm-toolkit.endpoints.endpoint_port_lookup" }}
-            - name: PATRONI_RESTAPI_LISTEN
-              value: 0.0.0.0:{{ tuple "postgresql-restapi" "internal" "restapi" . | include "helm-toolkit.endpoints.endpoint_port_lookup" }}
-            - name: PATRONI_POSTGRESQL_CONNECT_ADDRESS
-              value: $(PATRONI_KUBERNETES_POD_IP):{{ tuple "postgresql" "internal" "postgresql" . | include "helm-toolkit.endpoints.endpoint_port_lookup" }}
-            - name: PATRONI_POSTGRESQL_LISTEN
-              value: 0.0.0.0:{{ tuple "postgresql" "internal" "postgresql" . | include "helm-toolkit.endpoints.endpoint_port_lookup" }}
-            - name: PATRONI_admin_PASSWORD
-              value: $(PATRONI_SUPERUSER_PASSWORD)
-            - name: PATRONI_admin_OPTIONS
-              value: 'createrole,createdb'
-          command:
-            - /tmp/patroni_conversion.sh
-{{ dict "envAll" $envAll "application" "server" "container" "patroni_conversion" | include "helm-toolkit.snippets.kubernetes_container_security_context" | indent 10 }}
-          volumeMounts:
-            - name: pod-tmp
-              mountPath: /tmp
-            - name: patroni-conversion-tmp
-              mountPath: /var/run/postgresql
-            - name: postgresql-bin
-              mountPath: /tmp/patroni_conversion.sh
-              subPath: patroni_conversion.sh
-              readOnly: true
-            - name: postgresql-data
-              mountPath: {{ .Values.storage.mount.path }}
-            - name: postgresql-etc
-              mountPath: /tmp/patroni-templated.yaml
-              subPath: patroni.yaml
-              readOnly: true
+              subPath: {{ .Values.storage.mount.subpath }}
      containers:
        - name: postgresql
 {{ tuple $envAll "postgresql" | include "helm-toolkit.snippets.image" | indent 10 }}
@ -283,72 +157,24 @@ spec:
          env:
            - name: PGDATA
              value: "{{ .Values.storage.mount.path }}/pgdata"
-            - name: PATRONI_KUBERNETES_POD_IP
-              valueFrom:
-                fieldRef:
-                  fieldPath: status.podIP
-            - name: PATRONI_KUBERNETES_NAMESPACE
-              valueFrom:
-                fieldRef:
-                  fieldPath: metadata.namespace
            - name: KUBERNETES_NAMESPACE
              valueFrom:
                fieldRef:
                  fieldPath: metadata.namespace
-            - name: PATRONI_NAME
-              valueFrom:
-                fieldRef:
-                  fieldPath: metadata.name
            - name: POD_NAME
              valueFrom:
                fieldRef:
                  fieldPath: metadata.name
-            - name: PATRONI_KUBERNETES_POD_IP
-              valueFrom:
-                fieldRef:
-                  fieldPath: status.podIP
-            - name: PATRONI_SUPERUSER_USERNAME
-              valueFrom:
-                secretKeyRef:
-                  name: {{ .Values.secrets.postgresql.admin }}
-                  key: 'POSTGRES_USER'
-            - name: PATRONI_SUPERUSER_PASSWORD
+            - name: 'POSTGRES_PASSWORD'
              valueFrom:
                secretKeyRef:
                  name: {{ .Values.secrets.postgresql.admin }}
                  key: 'POSTGRES_PASSWORD'
-            - name: PATRONI_REPLICATION_USERNAME
-              value: {{ index .Values.secrets.pki.replication.hosts.names 0 | quote }}
-            - name: PATRONI_RESTAPI_CONNECT_ADDRESS
-              value: $(PATRONI_KUBERNETES_POD_IP):{{ tuple "postgresql-restapi" "internal" "restapi" . | include "helm-toolkit.endpoints.endpoint_port_lookup" }}
-            - name: PATRONI_RESTAPI_LISTEN
-              value: 0.0.0.0:{{ tuple "postgresql-restapi" "internal" "restapi" . | include "helm-toolkit.endpoints.endpoint_port_lookup" }}
-            - name: PATRONI_POSTGRESQL_CONNECT_ADDRESS
-              value: $(PATRONI_KUBERNETES_POD_IP):{{ tuple "postgresql" "internal" "postgresql" . | include "helm-toolkit.endpoints.endpoint_port_lookup" }}
-            - name: PATRONI_POSTGRESQL_LISTEN
-              value: 0.0.0.0:{{ tuple "postgresql" "internal" "postgresql" . | include "helm-toolkit.endpoints.endpoint_port_lookup" }}
-            - name: PATRONI_{{ .Values.endpoints.postgresql.auth.admin.username }}_PASSWORD
-              value: $(PATRONI_SUPERUSER_PASSWORD)
-            - name: PATRONI_{{ .Values.endpoints.postgresql.auth.admin.username }}_OPTIONS
-              value: 'createrole,createdb'
-{{- if .Values.manifests.secret_audit }}
-            - name: AUDIT_PASSWORD
+            - name: 'POSTGRES_USER'
              valueFrom:
                secretKeyRef:
-                  name: {{ .Values.secrets.postgresql.audit }}
-                  key: AUDIT_PASSWORD
-            # Adding the audit user with no options just adds the user without
-            # any GRANTs. This means the user gets to do only what default
-            # PUBLIC permissions allow, which is only to SELECT from tables.
-            - name: PATRONI_{{ .Values.endpoints.postgresql.auth.audit.username }}_PASSWORD
-              value: $(AUDIT_PASSWORD)
-{{- end }}
-            - name: PGSSLROOTCERT
-              value: {{ .Values.secrets.pki.client_cert_path }}/ca.crt
-            - name: PGSSLCERT
-              value: "/home/postgres/.postgresql/postgresql.crt"
-            - name: PGSSLKEY
-              value: "/home/postgres/.postgresql/postgresql.key"
+                  name: {{ .Values.secrets.postgresql.admin }}
+                  key: 'POSTGRES_USER'
          command:
            - /tmp/start.sh
          livenessProbe:
@ -370,10 +196,6 @@ spec:
              mountPath: /tmp
            - name: pg-run
              mountPath: /var/run/postgresql
-            - name: postgresql-bin
-              mountPath: /tmp/set_password.sh
-              subPath: set_password.sh
-              readOnly: true
            - name: postgresql-bin
              mountPath: /tmp/start.sh
              subPath: start.sh
@ -383,25 +205,16 @@ spec:
              subPath: readiness.sh
              readOnly: true
            - name: postgresql-etc
-              mountPath: /tmp/patroni-templated.yaml
-              subPath: patroni.yaml
+              mountPath: /tmp/postgresql.conf
+              subPath: postgresql.conf
+              readOnly: true
+            - name: postgresql-etc
+              mountPath: /tmp/pg_hba.conf
+              subPath: pg_hba.conf
              readOnly: true
            - name: postgresql-data
              mountPath: {{ .Values.storage.mount.path }}
-            - name: server-certs
-              mountPath: {{ .Values.secrets.pki.server_cert_path }}
-            - name: client-certs
-              mountPath: {{ .Values.secrets.pki.client_cert_path }}
-            - name: postgres-home-config
-              mountPath: "/home/postgres/.postgresql"
-            - name: client-certs
-              subPath: "client.crt"
-              mountPath: "/home/postgres/.postgresql/postgresql.crt"
-              readOnly: true
-            - name: client-certs
-              subPath: "client.key"
-              mountPath: "/home/postgres/.postgresql/postgresql.key"
-              readOnly: true
+              subPath: {{ .Values.storage.mount.subpath }}
      volumes:
        - name: pod-tmp
          emptyDir: {}
@ -410,32 +223,13 @@ spec:
        - name: pg-run
          emptyDir:
            medium: "Memory"
-        # This is for non-HA -> Patroni conversion and can be removed in the future
-        - name: patroni-conversion-tmp
-          emptyDir: {}
        - name: postgresql-bin
          secret:
            secretName: postgresql-bin
            defaultMode: 0555
-        - name: client-certs-temp
-          emptyDir: {}
-        - name: server-certs-temp
-          emptyDir: {}
-        - name: client-certs
-          emptyDir: {}
-        - name: server-certs
-          emptyDir: {}
-        - name: replication-pki
-          secret:
-            secretName: {{ .Values.secrets.postgresql.replica }}
-            defaultMode: 0640
-        - name: postgresql-pki
-          secret:
-            secretName: {{ .Values.secrets.postgresql.server }}
-            defaultMode: 0640
        - name: postgresql-etc
-          secret:
-            secretName: postgresql-etc
+          configMap:
+            name: postgresql-etc
            defaultMode: 0444
 {{- if not .Values.storage.pvc.enabled }}
        - name: postgresql-data
--- a/postgresql/values.yaml
+++ b/postgresql/values.yaml
@ -40,10 +40,6 @@ pod:
        postgresql:
          readOnlyRootFilesystem: true
          allowPrivilegeEscalation: false
-        patroni_conversion:
-          runAsUser: 999
-          allowPrivilegeEscalation: false
-          readOnlyRootFilesystem: true
    postgresql_backup:
      pod:
        runAsUser: 65534
@ -73,7 +69,8 @@ pod:
      weight:
        default: 10
  replicas:
-    server: 3
+    # only 1 replica currently supported
+    server: 1
    prometheus_postgresql_exporter: 1
  lifecycle:
    upgrades:
@ -144,10 +141,10 @@ pod:
          memory: "1024Mi"
          cpu: "2000m"

-# using dockerhub patroni: https://hub.docker.com/r/openstackhelm/patroni/tags/
+# using dockerhub postgresql: https://hub.docker.com/r/library/postgres/tags/
 images:
  tags:
-    postgresql: "docker.io/openstackhelm/patroni:latest-ubuntu_xenial"
+    postgresql: "docker.io/postgres:9.6"
    dep_check: quay.io/airshipit/kubernetes-entrypoint:v1.0.0
    image_repo_sync: docker.io/docker:17.07.0
    ks_user: docker.io/openstackhelm/heat:stein-ubuntu_bionic
@ -257,133 +254,42 @@ network_policy:

 conf:
  debug: false
+  pg_hba: |
+    host all all 127.0.0.1/32 trust
+    host all all 0.0.0.0/0 md5
+    local all all trust
+
  postgresql:
-    shared_buffers: 128MB
-    max_connections: 100
-  patroni: |
-    scope: {{ tuple "postgresql" "internal" . | include "helm-toolkit.endpoints.hostname_short_endpoint_lookup" }}
-    kubernetes:
-      labels:
-        application: {{ tuple "postgresql" "internal" . | include "helm-toolkit.endpoints.hostname_short_endpoint_lookup" }}
-        component: server
-      use_endpoints: true
-      ports:
-      - name: {{ tuple "postgresql" "internal" . | include "helm-toolkit.endpoints.hostname_short_endpoint_lookup" }}
-        port: {{ tuple "postgresql" "internal" "postgresql" . | include "helm-toolkit.endpoints.endpoint_port_lookup" }}
-    bootstrap:
-      users:
-        {{ .Values.endpoints.postgresql.auth.admin.username }}:
-          password: {{ .Values.endpoints.postgresql.auth.admin.password }}
-          options:
-          - createrole
-          - createdb
-      dcs:
-        ttl: 30
-        loop_wait: 10
-        retry_timeout: 10
-        maximum_lag_on_failover: 1048576
-        postgresql:
-          data_dir: '{{ .Values.storage.mount.path }}/pgdata'
-          pgpass: '{{ .Values.storage.mount.path }}/pgpass'
-          use_pg_rewind: true
-          parameters:
-            archive_mode: 'off'
-            datestyle: 'iso, mdy'
-            external_pid_file: '/tmp/postgres.pid'
-            hot_standby: 'on'
-            log_checkpoints: 'on'
-            log_connections: 'on'
-            log_disconnections: 'on'
-            log_line_prefix: 'postgresql: %t [%p]: [%l-1] %c %x %d %u %a %h %m '
-            log_lock_waits: 'on'
-            log_temp_files: 0
-            log_timezone: 'UTC'
-            max_connections: {{ .Values.conf.postgresql.max_connections }}
-            max_replication_slots: 10
-            max_wal_senders: 10
-            max_worker_processes: 10
-            ssl: 'on'
-            # These relative paths are relative to data_dir
-            ssl_cert_file: {{ .Values.secrets.pki.server_cert_path }}/server.crt
-            ssl_ca_file: {{ .Values.secrets.pki.server_cert_path }}/ca.crt
-            ssl_key_file: {{ .Values.secrets.pki.server_cert_path }}/server.key
-            ssl_ciphers: 'HIGH:+3DES:!aNULL'
-            tcp_keepalives_idle: 900
-            tcp_keepalives_interval: 100
-            timezone: 'UTC'
-            track_commit_timestamp: 'on'
-            track_functions: all
-            wal_keep_segments: 8
-            wal_level: hot_standby
-            wal_log_hints: 'on'
-      initdb:
-      - auth-host: md5
-      - auth-local: trust
-      - encoding: UTF8
-      - locale: en_US.UTF-8
-      - data-checksums
-      pg_hba:
-      - host all all 127.0.0.1/32 trust
-      - host all all 0.0.0.0/0 md5
-      - hostssl replication {{ .Values.endpoints.postgresql.auth.replica.username }} {{ .Values.secrets.pki.pod_cidr }} cert clientcert=1
-      - hostssl replication {{ .Values.endpoints.postgresql.auth.replica.username }} 127.0.0.1/32 cert clientcert=1
-      - local all all trust
-    postgresql:
-      {{/* Note: the postgres pod mounts a volume at /var/lib/postgresql/data,
-           so let's just avoid it and use /var/lib/postgresql/pgdata instead.
-           Patroni moves this directory to a backup under the parent directory
-           (/var/lib/postgresql) under certain failure recovery scenarios, so
-           /var/lib/postgres itself must be exposed to the pod as a pvc mount.*/}}
-      authentication:
-        superuser:
-          username: {{ .Values.endpoints.postgresql.auth.admin.username }}
-          password: {{ .Values.endpoints.postgresql.auth.admin.password }}
-      data_dir: '{{ .Values.storage.mount.path }}/pgdata'
-      pgpass: '{{ .Values.storage.mount.path }}/pgpass'
-      callbacks:
-        on_role_change: /tmp/set_password.sh
-        on_start: /tmp/set_password.sh
-      use_pg_rewind: true
-      remove_data_directory_on_rewind_failure: true
-      remove_data_directory_on_diverged_timelines: true
-      parameters:
-        archive_mode: 'off'
-        datestyle: 'iso, mdy'
-        external_pid_file: '/tmp/postgres.pid'
-        hot_standby: 'on'
-        log_checkpoints: 'on'
-        log_connections: 'on'
-        log_disconnections: 'on'
-        log_line_prefix: 'postgresql: %t [%p]: [%l-1] %c %x %d %u %a %h %m '
-        log_lock_waits: 'on'
-        log_temp_files: 0
-        log_timezone: 'UTC'
-        max_connections: {{ .Values.conf.postgresql.max_connections }}
-        max_replication_slots: 10
-        max_wal_senders: 10
-        max_worker_processes: 10
-        ssl: 'on'
-        # These relative paths are relative to data_dir
-        ssl_cert_file: {{ .Values.secrets.pki.server_cert_path }}/server.crt
-        ssl_ca_file: {{ .Values.secrets.pki.server_cert_path }}/ca.crt
-        ssl_key_file: {{ .Values.secrets.pki.server_cert_path }}/server.key
-        ssl_ciphers: 'HIGH:+3DES:!aNULL'
-        tcp_keepalives_idle: 900
-        tcp_keepalives_interval: 100
-        timezone: 'UTC'
-        track_commit_timestamp: 'on'
-        track_functions: all
-        wal_keep_segments: 8
-        wal_level: hot_standby
-        wal_log_hints: 'on'
-      pg_hba:
-      - host all all 127.0.0.1/32 trust
-      - host all all 0.0.0.0/0 md5
-      - hostssl replication {{ .Values.endpoints.postgresql.auth.replica.username }} {{ .Values.secrets.pki.pod_cidr }} cert clientcert=1
-      - hostssl replication {{ .Values.endpoints.postgresql.auth.replica.username }} 127.0.0.1/32 cert clientcert=1
-      - local all all trust
-    watchdog:
-      mode: off  # Allowed values: off, automatic, required
+    archive_mode: 'off'
+    cluster_name: 'postgresql'
+    datestyle: 'iso, mdy'
+    external_pid_file: '/tmp/postgres.pid'
+    fsync: 'on'
+    listen_addresses: '0.0.0.0'
+    log_checkpoints: 'on'
+    log_connections: 'on'
+    log_disconnections: 'on'
+    log_line_prefix: 'postgresql: %t [%p]: [%l-1] %c %x %d %u %a %h %m '
+    log_lock_waits: 'on'
+    log_temp_files: '0'
+    log_timezone: 'UTC'
+    max_connections: '1000'
+    max_locks_per_transaction: '64'
+    max_prepared_transactions: '0'
+    max_wal_senders: '16'
+    max_worker_processes: '10'
+    port: '5432'
+    shared_buffers: '2GB'
+    tcp_keepalives_idle: '900'
+    tcp_keepalives_interval: '100'
+    timezone: 'UTC'
+    track_commit_timestamp: 'on'
+    track_functions: 'all'
+    wal_keep_segments: '16'
+    wal_level: 'hot_standby'
+    wal_log_hints: 'on'
+    hba_file: '/tmp/pg_hba.conf'
+    ident_file: '/tmp/pg_ident.conf'
  backup:
    enabled: false
    base_path: /var/backup
@ -397,16 +303,6 @@ conf:

  exporter:
    queries:
-      pg_replication:
-        query: "SELECT EXTRACT(epoch FROM (now() - pg_last_xact_replay_timestamp()))::int AS lag, CASE WHEN pg_is_in_recovery() THEN 1 ELSE 0 END AS is_replica"
-        master: true
-        metrics:
-          - lag:
-              usage: "GAUGE"
-              description: "Replication lag behind master in seconds"
-          - is_replica:
-              usage: "GAUGE"
-              description: "Indicates if this host is a replica"
      pg_postmaster:
        query: "SELECT pg_postmaster_start_time as start_time_seconds from pg_postmaster_start_time()"
        master: true
@ -416,26 +312,8 @@ conf:
              description: "Time at which postmaster started"

 secrets:
-  pki:
-    client_cert_path: /client_certs
-    server_cert_path: /server_certs
-    pod_cidr: 0.0.0.0/0
-    server:
-      hosts:
-        names:
-          # this name should be the service name for postgresql
-          - postgresql.ucp.svc.cluster.local
-      life: 365
-    replication:
-      hosts:
-        names:
-          # this name needs to be the same as endpoints.postgres.auth.replica.username
-          - standby
-      life: 365
  postgresql:
    admin: postgresql-admin
-    replica: postgresql-replication-pki
-    server: postgresql-server-pki
    exporter: postgresql-exporter
    audit: postgresql-audit
    backup_restore: postgresql-backup-restore
@ -462,8 +340,6 @@ endpoints:
      admin:
        username: postgres
        password: password
-      replica:
-        username: standby
      exporter:
        username: psql_exporter
        password: psql_exp_pass
@ -548,8 +424,6 @@ manifests:
  network_policy: false
  job_ks_user: false
  secret_admin: true
-  secret_replica: true
-  secret_server: true
  secret_etc: true
  secret_audit: true
  secret_backup_restore: false
--- a/tools/deployment/common/postgresql.sh
+++ b/tools/deployment/common/postgresql.sh
@ -26,7 +26,7 @@ helm upgrade --install postgresql ./postgresql \
    --set monitoring.prometheus.enabled=true \
    --set storage.pvc.size=1Gi \
    --set storage.pvc.enabled=true \
-    --set pod.replicas.server=3 \
+    --set pod.replicas.server=1 \
    ${OSH_INFRA_EXTRA_HELM_ARGS} \
    ${OSH_INFRA_EXTRA_HELM_ARGS_POSTGRESQL}