Added Travis CI scripts

Author: Wagner Franchin

.travis.yml

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+language: bash
+services:
+  - docker
+script:
+  - docker-compose up -d
+  - docker-compose ps
+  - sleep 120
+  - docker-compose ps
+  - docker logs node1
+  - bash ./travis-ci/create_gr.sh
+  - bash ./travis-ci/test_gr.sh
+after_script:
+  - docker-compose down
+

travis-ci/create_gr.sh

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+#!/bin/bash
+
+docker-compose exec node1 mysql -uroot -pmypass \
+  -e "SET @@GLOBAL.group_replication_bootstrap_group=1;" \
+  -e "create user 'repl'@'%';" \
+  -e "GRANT REPLICATION SLAVE ON *.* TO repl@'%';" \
+  -e "flush privileges;" \
+  -e "change master to master_user='root' for channel 'group_replication_recovery';" \
+  -e "START GROUP_REPLICATION;" \
+  -e "SET @@GLOBAL.group_replication_bootstrap_group=0;" \
+  -e "SELECT * FROM performance_schema.replication_group_members;"
+
+for N in 2 3
+do docker-compose exec node$N mysql -uroot -pmypass \
+  -e "change master to master_user='repl' for channel 'group_replication_recovery';" \
+  -e "START GROUP_REPLICATION;"
+done

travis-ci/test_gr.sh

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+#!/bin/bash
+
+RESULT_FILE="test.txt"
+
+docker-compose exec node1 mysql -uroot -pmypass \
+  -e "SHOW VARIABLES WHERE Variable_name = 'hostname';" \
+  -e "SELECT * FROM performance_schema.replication_group_members;" > $RESULT_FILE
+
+CODE=$(egrep -c 'ONLINE' $RESULT_FILE)
+
+cat $RESULT_FILE
+rm $RESULT_FILE
+
+if [[ $CODE == 3 ]]; then
+    echo "Test check passed, 3 nodes ONLINE"
+    exit 0
+else
+    echo "Test check failed"
+    exit 1
+fi