[COMMON] Allow special characters in postgress passwords

Postgres image that we are currently using uses sed to replace
passwords placeholders with their actual values at startup time.
This apprach is very fragile and leads to issues if & happens to be a
part of password as it has a special meaning in sed.

To fix this issue let's just extract the setup.sql file from the
container and process it on our own in init container using envsubst
and then mount it to the main container to be used.

Issue-ID: OOM-2317
Signed-off-by: Krzysztof Opasiak <k.opasiak@samsung.com>
Change-Id: Ifd51d8f0af0099958caa209185fb7a87a0480bd2

3 files changed, 80 insertions, 3 deletions

diff --git a/kubernetes/common/postgres/configs/setup.sql b/kubernetes/common/postgres/configs/setup.sql
new file mode 100644
index 0000000000..f60b473242
--- /dev/null
+++ b/kubernetes/common/postgres/configs/setup.sql
@@ -0,0 +1,40 @@
+--- System Setup
+SET application_name="container_setup";
+
+CREATE EXTENSION IF NOT EXISTS pg_stat_statements;
+CREATE EXTENSION IF NOT EXISTS pgaudit;
+
+ALTER USER postgres PASSWORD '${PG_ROOT_PASSWORD}';
+
+CREATE USER ${PG_PRIMARY_USER} WITH REPLICATION;
+ALTER USER ${PG_PRIMARY_USER} PASSWORD '${PG_PRIMARY_PASSWORD}';
+
+CREATE USER "${PG_USER}" LOGIN;
+ALTER USER "${PG_USER}" PASSWORD '${PG_PASSWORD}';
+
+CREATE DATABASE ${PG_DATABASE};
+GRANT ALL PRIVILEGES ON DATABASE ${PG_DATABASE} TO "${PG_USER}";
+
+CREATE TABLE IF NOT EXISTS primarytable (key varchar(20), value varchar(20));
+GRANT ALL ON primarytable TO ${PG_PRIMARY_USER};
+
+--- PG_DATABASE Setup
+
+\c ${PG_DATABASE}
+
+CREATE EXTENSION IF NOT EXISTS pg_stat_statements;
+CREATE EXTENSION IF NOT EXISTS pgaudit;
+
+--- Verify permissions via PG_USER
+
+\c ${PG_DATABASE} "${PG_USER}";
+
+CREATE SCHEMA IF NOT EXISTS "${PG_USER}";
+
+CREATE TABLE IF NOT EXISTS "${PG_USER}".testtable (
+	name varchar(30) PRIMARY KEY,
+	value varchar(50) NOT NULL,
+	updatedt timestamp NOT NULL
+);
+
+INSERT INTO "${PG_USER}".testtable (name, value, updatedt) VALUES ('CPU', '256', now());
diff --git a/kubernetes/common/postgres/templates/_deployment.tpl b/kubernetes/common/postgres/templates/_deployment.tpl
index 3777c1b2e4..361e64847e 100644
--- a/kubernetes/common/postgres/templates/_deployment.tpl
+++ b/kubernetes/common/postgres/templates/_deployment.tpl
@@ -40,6 +40,34 @@ spec:
         name: "{{ index $dot.Values "container" "name" $pgMode }}"
     spec:
       initContainers:
+      - command:
+        - sh
+        args:
+        - -c
+        - "cd /config-input && for PFILE in `ls -1 .`; do envsubst <${PFILE} >/config/${PFILE}; done"
+        env:
+        - name: PG_PRIMARY_USER
+          value: primaryuser
+        - name: PG_PRIMARY_PASSWORD
+          {{- include "common.secret.envFromSecret" (dict "global" $dot "uid" (include "common.postgres.secret.primaryPasswordUID" .) "key" "password") | indent 10 }}
+        - name: PG_USER
+          {{- include "common.secret.envFromSecret" (dict "global" $dot "uid" (include "common.postgres.secret.userCredentialsUID" .) "key" "login") | indent 10 }}
+        - name: PG_PASSWORD
+          {{- include "common.secret.envFromSecret" (dict "global" $dot "uid" (include "common.postgres.secret.userCredentialsUID" .) "key" "password") | indent 10 }}
+        - name: PG_DATABASE
+          value: "{{ $dot.Values.config.pgDatabase }}"
+        - name: PG_ROOT_PASSWORD
+          {{- include "common.secret.envFromSecret" (dict "global" $dot "uid" (include "common.postgres.secret.rootPassUID" .) "key" "password") | indent 10 }}
+        volumeMounts:
+        - mountPath: /config-input/setup.sql
+          name: config
+          subPath: setup.sql
+        - mountPath: /config
+          name: pgconf
+        image: "{{ $dot.Values.global.envsubstImage }}"
+        imagePullPolicy: {{ $dot.Values.global.pullPolicy | default $dot.Values.pullPolicy }}
+        name: {{ include "common.name" $dot }}-update-config
+
       - name: init-sysctl
         command:
         - /bin/sh
@@ -98,9 +126,12 @@ spec:
         - name: PG_ROOT_PASSWORD
           {{- include "common.secret.envFromSecret" (dict "global" $dot "uid" (include "common.postgres.secret.rootPassUID" .) "key" "password") | indent 10 }}
         volumeMounts:
-        - name: pool-hba-conf
+        - name: config
           mountPath: /pgconf/pool_hba.conf
           subPath: pool_hba.conf
+        - name: pgconf
+          mountPath: /pgconf/setup.sql
+          subPath: setup.sql
         - mountPath: /pgdata
           name: {{ include "common.fullname" $dot }}-data
         - mountPath: /backup
@@ -129,7 +160,10 @@ spec:
 {{- else }}
         emptyDir: {}
 {{ end }}
-      - name: pool-hba-conf
+      - name: config
         configMap:
           name: {{ include "common.fullname" $dot }}
-{{- end -}}
\ No newline at end of file
+      - name: pgconf
+        emptyDir:
+          medium: Memory
+{{- end -}}
diff --git a/kubernetes/common/postgres/values.yaml b/kubernetes/common/postgres/values.yaml
index 7aff189ba9..10f9405de6 100644
--- a/kubernetes/common/postgres/values.yaml
+++ b/kubernetes/common/postgres/values.yaml
@@ -21,6 +21,9 @@ global:
   readinessRepository: oomk8s
   readinessImage: readiness-check:2.0.0
 
+  # envsusbt
+  envsubstImage: dibi/envsubst
+
 #################################################################
 # Secrets metaconfig
 #################################################################