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Applying cpu, memory and disk quotas. (#22)

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CPU and memory quotas using cgroups.
Disk quotas using userquota.
Limiting max allowed hp instances.
This commit is contained in:
Chalith Desaman
2021-07-08 17:18:01 +05:30
committed by GitHub
parent 5545e032f4
commit b51633563b
14 changed files with 188 additions and 66 deletions
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29
src/sqlite.cpp
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@@ -37,6 +37,8 @@ namespace sqlite
constexpr const char *IS_CONTAINER_EXISTS = "SELECT username, status, peer_port, user_port FROM instances WHERE name = ?";
constexpr const char *GET_ALOCATED_INSTANCE_COUNT = "SELECT COUNT(name) FROM instances WHERE status != ?";
constexpr const char *GET_RUNNING_INSTANCE_NAMES = "SELECT name FROM instances WHERE status = ?";
constexpr const char *GET_RUNNING_INSTANCE_USER_AND_NAME_LIST = "SELECT username,name FROM instances WHERE status = ?";
@@ -330,7 +332,7 @@ namespace sqlite
return 0;
}
LOG_ERROR << "Error inserting hp instance record. " << sqlite3_errmsg(db);
LOG_ERROR << errno << ": Error inserting hp instance record. " << sqlite3_errmsg(db);
return -1;
}
@@ -516,4 +518,29 @@ namespace sqlite
// Finalize and distroys the statement.
sqlite3_finalize(stmt);
}
/**
* Get count of running instances
* @param db Database connection.
* @return Count on success -1 on error.
*/
int get_allocated_instance_count(sqlite3 *db)
{
sqlite3_stmt *stmt;
std::string_view destroyed_status(hp::CONTAINER_STATES[hp::STATES::DESTROYED]);
if (sqlite3_prepare_v2(db, GET_ALOCATED_INSTANCE_COUNT, -1, &stmt, 0) == SQLITE_OK && stmt != NULL &&
sqlite3_bind_text(stmt, 1, destroyed_status.data(), destroyed_status.length(), SQLITE_STATIC) == SQLITE_OK &&
sqlite3_step(stmt) == SQLITE_ROW)
{
const uint64_t count = sqlite3_column_int64(stmt, 0);
// Finalize and distroys the statement.
sqlite3_finalize(stmt);
return count;
}
// Finalize and distroys the statement.
sqlite3_finalize(stmt);
return -1;
}
}