Merge pull request #38 from matter-labs/docs

chore(docs): Update link to EN mainnet DB backup

README.md

@@ -99,10 +99,10 @@ Basic auth secret can be generated by `htpasswd` and `sed` for interpolation:
 2. Prepare the latest database backup on your host. you can download it from our public GCS buckets:
 Skip this step if you are recovering from a snapshot!
 
-* [Era Mainnet latest dump](https://storage.googleapis.com/zksync-era-mainnet-external-node-backups/external_node_latest.pgdump)
+* [Era Mainnet latest dump](https://en-backups.matterlabs.dev/)
 * [Era Sepolia Testnet latest dump](https://storage.googleapis.com/zksync-era-testnet-sepolia-external-node-backups/external_node_latest.pgdump)
 
-Downloaded dump file should be placed into `{{ storage_directory }}/pg_backups` directory (`/usr/src/en/pg_backups` by default)
+Downloaded dump, if needed, should be unarchived and named `external_node_latest.pgdump`. File should be placed into `{{ storage_directory }}/pg_backups` directory (`/usr/src/en/pg_backups` by default).
 
 3. **OPTIONAL**: If you already have running node, you can copy its tree and state directory to a new host's `{{ storage_directory }}/db`. (`/usr/src/en/db` by default)
 Skip this step if you are recovering from a snapshot!

defaults/main.yml

@@ -59,8 +59,14 @@ postgres_arguments:
 enable_postgres_replication: false
 # IP address of the interface replication
 postgres_replications_arguments: []
+postgres_replica_user_name: ""
+postgres_replica_user_password: ""
+postgres_replica_auth_method: "scram-sha-256"
 postgres_replication_bind_address: ""
 postgres_replica_address: ""
+backup_db_user: ""
+backup_db_password: ""
+backup_db_name: ""
 
 # Enable TLS for traefik
 enable_tls: false

example_playbooks/mainnet_with_snapshots_recovery/requirements.yml

@@ -10,3 +10,6 @@ roles:
 collections:
   - name: community.general
     version: 8.4.0
+  # Collection for the replication only.
+  - name: community.postgresql
+    version: 3.7.0

tasks/main.yml

@@ -9,3 +9,7 @@
 
 - name: Prepare configs
   ansible.builtin.include_tasks: provision.yml
+
+- name: Configure replication on main instance
+  ansible.builtin.include_tasks: replication.yml
+  when: enable_postgres_replication

tasks/provision.yml

@@ -46,6 +46,8 @@
     - postgres_replication_bind_address
     - postgres_replica_address
     - postgres_replications_arguments
+    - postgres_replica_user_name
+    - postgres_replica_user_password
 
 - name: Check required en vars empty
   ansible.builtin.fail:

tasks/replication.yml

@@ -0,0 +1,60 @@
+---
+
+- name: Install libpq-dev packages
+  ansible.builtin.apt:
+    update_cache: true
+    name: libpq-dev
+
+- name: Install psycopg2 python package
+  ansible.builtin.pip:
+    name: psycopg2
+
+- name: Grant user replication access for replication.
+  community.postgresql.postgresql_pg_hba:
+    dest: "{{ storage_directory }}/postgres/pg_hba.conf"
+    contype: host
+    users: "{{ postgres_replica_user_name }}"
+    source: "{{ postgres_replica_address }}/32"
+    databases: replication
+    method: "{{ postgres_replica_auth_method }}"
+
+- name: Create postgres replication user
+  community.postgresql.postgresql_user:
+    login_host: "{{ postgres_replication_bind_address }}"
+    login_user: "{{ database_username }}"
+    login_password: "{{ database_password }}"
+    name: "{{ postgres_replica_user_name }}"
+    password: "{{ postgres_replica_user_password }}"
+    role_attr_flags: "REPLICATION"
+
+- name: Create replication slot if doesn't exist
+  community.postgresql.postgresql_slot:
+    login_host: "{{ postgres_replication_bind_address }}"
+    login_user: "{{ database_username }}"
+    login_password: "{{ database_password }}"
+    slot_name: replica
+
+- name: Reload postgres configuration
+  community.postgresql.postgresql_query:
+    login_host: "{{ postgres_replication_bind_address }}"
+    login_user: "{{ database_username }}"
+    login_password: "{{ database_password }}"
+    query: "SELECT pg_reload_conf()"
+
+- name: Create postgres backup user
+  community.postgresql.postgresql_user:
+    login_host: "{{ postgres_replication_bind_address }}"
+    login_user: "{{ database_username }}"
+    login_password: "{{ database_password }}"
+    name: "{{ backup_db_user }}"
+    password: "{{ backup_db_password }}"
+
+- name: Grant role pg_read_all_data to backup user
+  community.postgresql.postgresql_membership:
+    login_host: "{{ postgres_replication_bind_address }}"
+    login_user: "{{ database_username }}"
+    login_password: "{{ database_password }}"
+    group: pg_read_all_data
+    target_roles:
+      - "{{ backup_db_user }}"
+    state: present

templates/consensus_config.yaml.j2

@@ -1,9 +1,10 @@
 server_addr: '0.0.0.0:3054'
 public_addr: '{{ ansible_default_ipv4.address }}:{{ consensus_port }}'
 max_payload_size: 5000000
-gossip_dynamic_inbound_limit: 100
+gossip_dynamic_inbound_limit: 200
-gossip_static_outbound:
+rpc_config:
-{% for item in consensus_outbound %}
+  get_block_rate:
-  - key: {{ item.key }}
+    burst: 5
-    addr: {{ item.addr }}
+    refresh: # 0.2s
-{% endfor %}
+      seconds: 0
+      nanos: 200000000

templates/docker-compose.yaml.j2

@@ -44,8 +44,6 @@ services:
     env_file:
       - postgres.env
 {% if enable_postgres_replication %}
-    environment:
-      POSTGRES_HOST_AUTH_METHOD: "host replication replicator {{ postgres_replica_address }}/32 md5"
     ports:
       - "{{ postgres_replication_bind_address }}:5432:5432"
 {% endif %}