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Support for connecting to DB in namespace via TCP port in multi-asic platform. #4779

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merged 5 commits into from
Jun 30, 2020
Merged

Support for connecting to DB in namespace via TCP port in multi-asic platform. #4779

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a9e6c71
Support for connecting to DB in namespace via IP:port ( using docker …
judyjoseph Jun 16, 2020
24a95e8
Updates based on review comments.
judyjoseph Jun 23, 2020
525a97c
Added the default IP as 127.0.0.1 if the IPaddress derivation from in…
judyjoseph Jun 24, 2020
1390649
HOST_IP j2 template argument passed on command line, i.s.o exporting.
judyjoseph Jun 26, 2020
80e77b2
Fix to get a newline after program:
judyjoseph Jun 29, 2020
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2 changes: 1 addition & 1 deletion dockers/docker-database/database_config.json.j2
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Original file line number Diff line number Diff line change
@@ -1,7 +1,7 @@
{
"INSTANCES": {
"redis":{
"hostname" : "127.0.0.1",
"hostname" : "{{HOST_IP}}",
"port" : 6379,
"unix_socket_path" : "/var/run/redis{{NAMESPACE_ID}}/redis.sock",
"persistence_for_warm_boot" : "yes"
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23 changes: 22 additions & 1 deletion dockers/docker-database/docker-database-init.sh
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@@ -1,5 +1,23 @@
#!/usr/bin/env bash

# For linux host namespace, in both single and multi ASIC platform use the loopback interface
# For other namespaces, use eth0 interface which is connected to the docker0 bridge in the host.
if [[ $NAMESPACE_ID == "" ]]
then
INTFC=lo
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else
INTFC=eth0
LOOPBACK_IP=127.0.0.1
fi
local_ip=$(ip -4 -o addr show $INTFC | awk '{print $4}' | cut -d'/' -f1 | head -1)

# if the ip address was not retrieved correctly, put the loopbackIP as the default.
if [[ $local_ip == "" ]]
then
local_ip=127.0.0.1
fi
export HOST_IP=$local_ip

REDIS_DIR=/var/run/redis$NAMESPACE_ID
mkdir -p $REDIS_DIR/sonic-db

Expand All @@ -22,6 +40,9 @@ then
fi

# generate all redis server supervisord configuration file
sonic-cfggen -j /var/run/redis/sonic-db/database_config.json -t /usr/share/sonic/templates/supervisord.conf.j2 > /etc/supervisor/conf.d/supervisord.conf
# Pass the Loopback IP explicitly in case of namespaces other than the linux host namespace.
# This is needed as there are applications who hardcoded host=loopback IP in Connector classes.
# Redis server will then bind on multiple IP addresses viz <loopback ip> , <eth0 ip>
sonic-cfggen -j /var/run/redis/sonic-db/database_config.json -a "{\"LOOPBACK_IP\":\"$LOOPBACK_IP\"}" -t /usr/share/sonic/templates/supervisord.conf.j2 > /etc/supervisor/conf.d/supervisord.conf
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exec /usr/bin/supervisord
2 changes: 1 addition & 1 deletion dockers/docker-database/supervisord.conf.j2
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Expand Up @@ -20,7 +20,7 @@ stderr_logfile=syslog
{% if INSTANCES %}
{% for redis_inst, redis_items in INSTANCES.iteritems() %}
[program: {{ redis_inst }}]
command=/bin/bash -c "{ [[ -s /var/lib/{{ redis_inst }}/dump.rdb ]] || rm -f /var/lib/{{ redis_inst }}/dump.rdb; } && mkdir -p /var/lib/{{ redis_inst }} && exec /usr/bin/redis-server /etc/redis/redis.conf --port {{ redis_items['port'] }} --unixsocket {{ redis_items['unix_socket_path'] }} --pidfile /var/run/redis/{{ redis_inst }}.pid --dir /var/lib/{{ redis_inst }}"
command=/bin/bash -c "{ [[ -s /var/lib/{{ redis_inst }}/dump.rdb ]] || rm -f /var/lib/{{ redis_inst }}/dump.rdb; } && mkdir -p /var/lib/{{ redis_inst }} && exec /usr/bin/redis-server /etc/redis/redis.conf --bind {{ LOOPBACK_IP }} {{ redis_items['hostname'] }} --port {{ redis_items['port'] }} --unixsocket {{ redis_items['unix_socket_path'] }} --pidfile /var/run/redis/{{ redis_inst }}.pid --dir /var/lib/{{ redis_inst }}"
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just wonder is there any case both LOOPBACK_IP and HOST_IP are empty, if there is a case , the --bind without parameter will work or NOT ?

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This case should not happen as the LOOPBACK_IP is hardcoded to 127.0.0.1 , the HOST_IP is either 127.0.0.1 ( in case of linux host namespace ) or the docker0 IP address in case of namespaces. But I can add the the default fallback IP of 127.0.0.1, if this error scenario arises.

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Updated the code, so that if we are not able to get the ip address correctly from interface, it is set to loopback ip 127.0.0.1 as the default.

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@dzhangalibaba let me know it this was ok ?

priority=2
autostart=true
autorestart=false
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